eno mag 4 2013 (englisch)
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ÂTRANSCRIPT
www.eno-energy.com
The magazine for success with wind
| No. 4 / 2013
Let’s move on: How new opportunities emerge in an uncertain environmentThe regulations for the wind industry are once again up for discussion. Nevertheless, eno energy is looking to the future with optimism, since the company has always stood for innovation, flexibility and maximum quality. / from page 4
2
www.eno-energy.com
enovation for efficiency
For maximum efficiency of wind farm
The maximum efficiency of wind farm
is ensured by the eno 114, even at sites
with higher ambient turbulence. 3,500
kW rated power output enables the
eno 114 to be the most powerful
onshore turbine within the 3 MW class.
3.5 MW
3The magazine for success with wind
Content Editorial
Dear Readers,the last parliamentary elections date back quite some time now. Until the new federal government has constituted itself, we are all in a kind of stand-by mode and a lot is being speculated in the wind industry: What will happen with the German Renewable Energy Sources Act (EEG) and the many proposals for its reform? How could a modern electrici-ty market be designed that places rene-wables in greater competition? And will there be a separate area of responsibility within the government that finally steers the energy turnaround in an effective and reliable manner? Given the current political vacuum, our eno mag 04/13 is focussing more on energy policy aspects. We want to look at the ongoing EEG debate in Germany from a foreign perspective and, through an external energy market expert, examine the future development of the German electricity market from the wind energy point of view.In addition, you will also find out the la-test news from all areas of the compa-ny. For instance, the articles on the de-velopment of innovative rotor blades and new electronic components provide us with a foretaste for next year when eno will be increasing its production depth and quality by means of considerable self-developed technology, thus setting a clear example in the industry.We hope you enjoy your reading and we wish you an excellent start to 2014.
Andreas Jessel Head of Marketing + Communication
ImprInt Author eno energy GmbH | Am Strande 2 e | 18055 Rostock | Germany | phone: +49 (0)381 . 20 37 92-0 | fax: +49 (0)381 . 20 37 92-101 | [email protected] | www.eno-energy.com | Editing and Layout Andreas Jessel | Layout WERK3.de | printing Stadtdruckerei Weidner | paper Satimat Green 60 % Recycling, 40 % FSC | Copyright All contributions published in e.n.o. magazine (copy, photos, graphics, tables, logos) are protected by copyright. Reprinting, inclusion in databases, use in online services or Internet pages and reproduction are only permitted with the prior written permission by e.n.o. energy Gmbh. | Despite careful inspection of the publication by the editorial team, eno can accept no liability for its accuracy. | published sporadically | photo WMC . eno energy
04 Energy policy and marketSweden’s quota model, model for Germany?
06Electricity market development from the wind energy perspective
9 Financing and ShareholdingsEvaluation of wind projects today
and with a changed electricity
market design
10 ProjectsRepowering: a broad field but a
great chance for the eno 114
12 Densification and expansionTwo exciting wind projects in
Broderstorf and Suderburg
13 Construction and Technology eno energy increases
production depth
14 Time that things begin to turneno reaches the final straight on
route to achieving its own rotor
blade
16 eno internationaleno team with the new
eno 82 - 1.5 MW in Birmingham;
Office opening in Paris
17 eno mixUnderway with the wind or how
wind energy has taken to the road
18 Rostock Wind Energy ForumSailing close to the wind - right
on the pulse of the industry
19 Corporate Designeno energy in a new dress
4 Energy Policy + Market
red when taking a glimpse at the Vind-bruk Kollen database. Here projects are registered which, should they be rea-lised, would enable well over 30 TWh of electricity to be produced from wind energy.
Our Energy Agency estimates that Swe-den will achieve its target of generating 50 percent of its total electricity produc-tion from renewable energies by 2020.
Your connection to the German parent company enables you to com-pare the situation in both countries, especially regarding the public sub-sidy systems for renewable energies. What are the differences?
Sweden’s system is market-based and utilises green certificates that are not linked to any specific technology but are
mr Holst, you became head of eno energy Sweden AB in 2011. How is the wind energy market currently developing in Sweden?
The Swedish Energy Agency provides regular forecasts on the short- and long-term development of the wind energy market. The latest short-term forecast issued in autumn 2013 estimates that the production of wind power will incre-ase up to 9.3 TWh in 2013 and up to 10.8 TWh in 2014. It is expected to reach an output of 12 TWh in the fol-lowing year in 2015.
The wind industry is far more optimistic about developments in Sweden. Accor-ding to Swedish Wind Energy’s latest forecast from this year, the provision of wind energy is already likely to reach 16 TWh in 2020. Yet another picture is offe-
issued to all renewable energy produ-cers. This system is based on the share of the total electricity consumed by end consumers in Sweden that our legisla-tors have stipulated should be met by renewable energies.
For the year 2013, a share of 13 % has been specified. Our electricity providers must purchase certificates and report each year to the responsible authorities that they have bought the same number of certificates as the quota of renewable energy sold to their customers.
In contrast, Germany has a feed-in tariff system that is not market-based and which guarantees producers definite income security for a period of 20 years.
For years the German renewab-le Energy Sources Act (EEG) was
Quota model in Sweden, model for Germany?Interview with Gert-Olof Holst
Gert-Olof Holst
the graduate electrical engineer has been active in the wind industry since 1996. Before he became mana-ging Director of eno energy Sweden in 2012, Gert-Olof Holst worked for two large wind energy companies as a Sales manager and managing Director. He has now brought almost 100 mW of wind energy onto the Swedish market.
www.eno-energy.com
5The magazine for success with wind
seen as a role model in Europe and in many other countries worldwide. But now the discussion about exploding energy prices, which are often solely attributed to the expansion of rene-wable energies, threatens to jeopar-dise its acceptance in Germany. Do you see an advantage in the Swedish quota model?
There are indeed advantages in the Swedish model. Sweden has seen a relatively large expansion of renewable energy at a low cost to taxpayers.
This system also exerts considerable pressure on landowners, contractors and project developers to use renewable energy. However, it is frequently over-looked in the discussion that our system has not led to the development of a do-mestic Swedish wind energy industry.
In a market-based quota system, only large companies can balance out the considerable fluctuations in remunerati-on that can be achieved for the electrici-ty production as a result of their strong financial resources. This makes it difficult for smaller companies and private ope-rators to participate in this system.
Does the quota model ensure stron-ger competition and lower energy prices ?
Yes, it increases competition and lowers prices but you have to see the big pic-ture. Long-term planning security is re-quired for those who invest in renewable energies, otherwise there will only be limited growth in the wind industry.
This is where incentives need to be created so that there is investment secu-rity and a wind industry can develop in Sweden. This will also lead to great tax revenues and more employment in the long term.
How would you assess the current situation in Germany? Which need for reform do you see?
Ultimately it is difficult to say which mo-del Germany needs. Germany’s clear cut decision to phase out nuclear power
means that it has to be ensured that this loss can be compensated for by other forms of energy production – and hope-fully by renewables. This I think requires more than a purely market-based quota system like the one we have in Sweden.
Perhaps a quota system with a minimum guaranteed compensation would be suitable. It is always about creating good conditions for sustainable investment and financial security. That is difficult to achieve in a purely market-based quota system.
In 2013 you have erected several wind turbines in Sweden. What were your experiences with the licensing autho-
rities and which difficulties did you have to overcome?
We haven’t had any problems obtaining permits and licenses from the authorities for the wind turbines that we have deli-vered in 2013. We have supplied pro-jects where the permits and licenses were already granted. The existing ex-pertise within the company and the Swedish subsidiary company ensured that these projects were able to be rea-lised in a very professional manner.
Although polls show considerab-le approval for expanding renewab-le energies, there are still huge pro-blems in Germany when it comes to
q Construction of the eno 100 in Kulleryd (Sweden, 2013)
6 Energy Policy + Market
accepting new wind farms. What is the situation in Sweden?
My experiences in project develop-ment – and not just in Sweden but also in Finland and Norway – have shown me that the issue of acceptance is more or less the same in all countries.
It seems that people everywhere under-stand that we need to switch to renewa-ble energies – just as long as it doesn’t happen in their own backyard.
In Sweden and other Nordic countries we have a great advantage over Germa-ny in that we have a much lower popula-
tion density and therefore a much more relaxed situation when it comes to loca-tions for renewable energy facilities.
I know that it now sounds like a platitu-de, but we always strive to hold an open dialogue during the very early stages of a project with those who live in the im-mediate vicinity of the planned wind tur-bines and, if possible, find models for shared ownership.
What potential do you see in your country for expanding wind ener-gy and which goals does eno energy Sweden want to achieve during the next few years?
There is considerable potential for rene-wable energies in Sweden. Given that the traditionally large proportion of hyd-ropower offers little potential for expansi-on and that we have ambitious goals such as replacing all fossil fuels with renewables by 2020, wind energy will remain an important component for further expansion.
eno energy Sweden is aiming to achieve a market share of three percent in 2014 and further expand the eno brand.
Guest article
Development of the German electricity market from the perspective of wind energy
Given a new »black-red« grand coalition government, the next steps for shaping the future of the German electricity mar-ket will be redefined. The government is planning to amend the EEG by Easter 2014. What is to be expected?
Almost certain would be the introduction of mandatory direct selling as part of the market bonus for new installations. Initi-ally, this will take place as before via a flexible market bonus. This will later be replaced by a fixed bonus, as a supple-ment to revenue from the direct sale of electricity.
The aim is to achieve demand-driven supply. What this means for supply-de-pendent, fluctuating renewable energy sources like wind and solar energy will be considered below. First, however, it
should be noted that mandatory direct selling in the context of a flexible market bonus involves risks for today’s wind energy sector participants.
This might sound paradoxical because over 80 % of all wind turbines are alrea-
dy marketed via the market bonus mo-del. However, once the security of being able to return to the feed-in tariff at any time falls away, the risks (e.g. insolvency of the direct seller) are assessed far higher by banks. This leads to higher
financing costs and a higher equity ratio. Companies with sufficient capital are therefore preferred along the entire value creation chain, thereby endangering any further market participation of small and medium-sized businesses. However, these effects can be counteracted by
appropriate regulations to minimise risks, in particular the risk of non-payment by the direct seller.
If funding is implemented as a fixed bonus on revenue from the electricity
»What are the prospects of independently selling wind energy regardless
of political decisions and funding?«
7The magazine for success with wind
q Figure 1: merit order (Source: Energy Brainpool)
q Figure 2: Development of extreme prices until 2040 (Source: Energy Brainpool)
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Ele
ctric
ity p
rice
Renewable energies
Market price without CO2
Market price with CO2
Installed capacity (cumulated)
Electricity price effect of the emission trading
Coal PP, old
Gas turbines
CCPP
Ele
ctric
ity re
qu
irem
ent
Lignite PP, new
Coal PP, new
Lignite PP, oldNuclear power plants
CO2 costs for fossil power plants
Variable costs for power plants (without CO2)
8 Energy Policy + Market / Financing + Shareholdings
market, there is a risk that the bonus will be too low or too high. Free-rider effects are possible if the bonus is too high. If the bonus were too low, this would
bear – in addition to the risks mentioned above – the risk that any further expansi-on would grind to a halt since projects are then no longer profitable.
What are the prospects of independently selling wind energy regardless of political decisions and funding? There are excess capacities on the German electricity market, not least caused by the expan-sion of renewable energies. In recent years, this has led to steadily declining electricity prices. In this so-called ener-gy-only market, the use of power plants is determined by the merit order for each individual hour, in which case the plants are sorted by short-term marginal costs. The most expensive plant that has to generate electricity to meet demand determines the price. This price also applies to all other plants in operation at the time (see Figure 1).
Load peaks were previously covered by flexible but expensive gas-fired power plants. However, they are needed to complement renewable energy in the future due to their flexibility.
Wind turbines, in turn, generate elec-tricity at a marginal cost of zero. They therefore lead the merit order (sequence of power plant use determined by marginal costs of electricity generation, and displace more expensive power plants that are rarely used. With only a few hours at full load and with low prices , these conventional power plants are uneconomical.
Wind turbines, however, cannot ge-nerate in a demand-oriented way but are supply-dependent (is there any wind?) in times of high prices. In addi-tion, there is a significant simultaneity
factor, that is, many wind turbines generate electricity at the same time, so power supply is running high and the prices are low. From the current point of
view, it is unlikely that the full costs of wind turbines will be carried on the pure electricity market at least until cost-efficient storage systems or load management systems have been developed .
Looking at the expected long-term deve-lopment of the electricity market, many of the issues raised will be put into per-spective. When nuclear power has been
www.energybrainpool.com
Tobias Huschke
// Graduate industrial engineer with a focus on environmental technology
// 12 years of professional experience in renewable energies: European Sales manager for a medium-sized solar power company; Development of business models for marketing solar power without EEG; Infrastructure projects for feeding renewable energies into the grid
// Since 2013 Senior Consultant at Energy Brainpool, focus on transforming the renewable energy market
Energy Brainpool GmbH & Co. KG
the independent analysis and consulting company for the energy industry. We offer individual training and consultancy services, studies and forecasts, as well as our own energy marketing model (power2Sim) for simulating the electricity and gas markets and the CO2 trade in Europe. In the market transformation of renewable energies field, we produce studies and offer training programmes and in-house seminars on renewable energies in the electricity market. In addition, we also offer a diverse range of services and consultancy products such as business model development and optimisation.
»The most expensive plant that has to generate electricity to meet demand
determines the price.«
phased out by 2022 at the latest, rele-vant excess capacities are expected to disappear.
From this point on, prices will fluctuate much more frequently and stronger, not least caused by the volatile supply of wind and solar energy (see Figure 2). New business models will arise through these price differences – for flexible gas-fired power plants as well as for wind and PV systems and storage and load management systems.
That is why, for example, electricity sales by virtual combined power plants inclu-ding storage systems could be shifted to times of high prices, i.e. high demand and low electricity generation by wind and sun energy.Guest article: Author Tobias Huschke, Energy Brainpool
9The magazine for success with wind
In Germany, both the financing and eva-luation of wind energy projects are large-ly influenced by the German Renewable Energy Sources Act (EEG), which among others provides planning security. Whereas similar regulations are available in other countries, such as France, there are also countries where comple-tely market-based remuneration systems are used.
The type of subsidies available for wind energy, however, has a considerab-le influence on the funding possibilities and realisation of projects. Classic pro-ject funding structures are frequently used in systems with fixed feed-in regi-mes. This is due to the fact that in cont-rast to conventional corporate financing, project financing is conducted exclusi-vely through the project yields and there are generally no possibilities for acces-sing other assets from shareholders and/or any associated third parties, such as holdings. It is therefore necessary to be able to calculate the yields expected in a project as accurately as possible, as is done based on fixed feed-in tariffs and robust wind yield appraisals.
As with companies, wind farms are evaluated on the basis of the yields expected in future. These are discoun-ted taking into account the opportuni-ty costs and the risk aspects, which – to put it simply – leads to the so-called net present value for the yields expec-ted in future. This value, reduced by the proportion of borrowed capital, corre-sponds to the »fair« price for the wind farm. The starting point for evaluating wind farms are the yields expected in
future. The more likely that they occur, the lower the fluctuation range of the company value.
This is due to the risk add-ons with the required discount rate. In a system of market-based remuneration, these are very difficult to forecast across the wind farm’s period of utilisation. This in turn leads to an increase in the risk and ulti-mately to a lower evaluation of the wind farm. Classic project financing with a high proportion of external capital and limited liability rights is likewise difficult to realise.
In addition to evaluating the share rights for a wind farm, it is also possib-le to just evaluate the project rights for a wind farm that is still to be constructed. The basic evaluation here is conducted according to the same model, whereby the evaluation increases as the project progresses.
This is partly due to the increased pro-bability of the future yields occurring: the more construction and planning risks that are overcome, the lower the fluc-tuation range in the evaluation. Evol-ving project rights generally first gain an appreciable value with the issuing of the German Federal Emission Control Act (BImSchG) approval. This increases successively as soon as the financing is secured, the site is secured and the purchase agreements are signed.
All steps including their respective eva-luations and the concluding evaluation are based on reliable framework condi-tions that are provided, amongst others,
Guest article
Evaluation of wind projects today and with a changed electricity market design
by the current German Renewable Ener-gy Sources Act (EEG). In order to be able to complete the energy revolution and the expansion of renewable energies in accordance with plans, it is necessa-ry to take these aims into considerati-on with the forthcoming amendment to the EEG Act. It should be urgently ensu-red that the framework conditions do not endanger the aims. Such a risk is inhe-rent, for example, in considering whe-ther to restrict and/or completely can-cel the precedence given to renewab-le energies.
Furthermore, any changes should be provided with transitional periods that take into account the long and cost-intensive planning process for wind tur-bines.Guest article: Author Joachim Treder, HSH Nordbank AG
www.hsh-nordbank.de
Joachim Treder
Joachim treder has been active in the renewable energy field since 2002. At HSH nordbank – one of the energy industry’s leading financers for wind and solar power projects – he is responsible among other things for project financing in Germany and abroad. In regards to his business relations with eno energy, the financial expert says: »We’re following the development of eno energy GmbH with increasingly growing interest. the collaboration that started a few years ago already resulted in a joint transaction in 2012. We’re interested in intensifying the relationship in future. We value eno’s previous successes both in the project development field as well as in the production of its self-developed wind turbines, combined with the increased foreign focus.«
By Joachim Treder, Senior Vice President Renewable Energy Orgination HSH Nordbank AG
10 Projects
For years now, repowering has been predicted a bright future on the onshore market. However, the big breakthrough in replacing older with new turbines is yet to happen. First, numerous legal approval issues and economic barriers need to be overcome.
For example, old development plans by default do not per-mit repowering projects for wind energy purposes. Even new-ly created regional plans no longer define a number of old sites as suitable areas. According to surveys conducted by the con-sulting company »Deutsche WindGuard«, about 4,500 of the 23,000 existing wind turbines were older than 15 years at the end of 2012. These so-called first generation turbines are often individual systems and are usually operated by private persons who have paid off their systems and now operate them profi-tably.
These individuals often sim-ply lack the equity for expensi-ve repowering measures with lar-ge new machines. Nevertheless, of the approximately 1,000 new-ly installed wind turbines in 2012, about 16 % were repowering projects according to estimates of the »Deutsche WindGuard«.
eno energy implemented a task force some time ago, which deals extensively with the issue of repowering. This team is currently conducting an analysis with a subsequent evaluation at various project developers with potential sites.
Henri Wasnick from eno energy systems GmbH belongs to this group and is confident after reviewing the initial results. »Alt-hough not all sites that are technically viable come into ques-tion because of height restrictions or unrealisable nature con-servation issues,« says the sales manager, »we noted a gro-wing demand with planners and private operators, as the rapid development of technology makes it economically feasible to replace underperforming small older turbines with high-perfor-ming new ones before the end of their technical service life.«
The reason for the company’s pronounced interest in this topic is the eno 114 with its large 3.5-MW generator that boasts an ample power output and the right properties that allow for an implementation of repowering measures even in technically difficult locations, due to turbulences for example.
Wasnick is enthusiastic about the technical possibilities of this machine: »The eno 114 has a gear mechanism as it is normally
used in offshore installations. Due to its low speed, the system runs very quietly and wake buffeting is reduced.«
In addition, there is a four-point suspension with an uncons-trained gearbox mounting instead of the conventional three-point suspension and a newly developed rotor blade design that minimises turbine-induced turbulences with a better rotor profile. The improved aerodynamics shortens the turbulence cone behind the turbine.
All in all, the turbine density in wind farms can be increased thanks to the excellent turbulence properties – both in existing and in new farms. The use of the eno 114 ensures a maximum utilisation of available space while minimising sectoral shut-downs – and thus guarantees highest yields.
The operators’ benefits of repow-ering are obvious: new wind turbi-nes are more reliable and require less maintenance than old ones. They generally achieve more full load hours thanks to technical developments. And abroad, there now is a secondary market for older wind turbines that are being replaced.
When repowering projects meet the legal requirements, such as a minimum age of ten years for the existing turbine, there are additional incentives in the form of higher initial remunerati-on rates and an EEG bonus of 0.5 cents/kWh that, however, is only paid given a double power rating versus the old turbine.
»Many old first and second generation turbines range between 500 kW and 1.5 MW,« says Henri Wasnick and adds, »With the large 3.5 MW generator of the 114 series, we easily meet the bonus requirements. And even if the bonus is cut by an EEG amendment, projects in various locations will be economically justifiable nevertheless.«
It has generally become the rule of thumb for determining the cost effectiveness and efficient use of sites that half the turbine count while double the power output means tripling the yield.
Municipalities can also benefit from repowering measures, and not only in economic terms. Due to the larger installed capa-city, higher yields are generated that in return increase trade taxes for the community. Compared to old wind turbines, new ones are optimised in terms of shading and light reflections. Moreover, they are quieter due to improved rotor blade aerody-
Repowering: a broad field but a great chance for the eno 114
The operators’ benefits of repowering are obvious:
new wind turbines are more reliable and require less maintenance than
old ones.
11The magazine for success with wind
namics and geometry, and they run slower due to lower rota-tion speeds. Finally, a lower number of wind turbines relieves the landscape and old planning errors such as too small dis-tances to residential areas can be corrected.
Regarding the question of acceptance, another advantage might result: approval for a repowering measure may be higher in communities in which local residents have become accus-tomed to turbines over the years, and even view them as new landmarks of their villages and towns.
Several repowering projects are currently in development at eno energy. In addition to the current plans with the eno 114, there are projects with other turbine types, such as the repla-
cement of four old 500 kW turbines manufactured by Nord-wind with three eno 82s in the district of Ludwigslust-Parchim in Mecklenburg-West Pomerania.
»Our customers appreciate our flexibility, which manifests itself in our specific and comprehensive support during all project phases from individual projects to wind farms,« Henri Wasnick summarises the situation in the eno sales department. »Given the technical advantages of our turbines – particularly of the eno 114 for technically challenging locations – and our short delivery times, we are well-equipped for the upcoming repow-ering years.«
3,000
2,700
2,400
2,100
1,800
1,500
1,200
900
600
300
0
-300
30,000
27,000
24,000
21,000
19,000
15,000
12,000
9,000
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0
-3,000
An
nu
al in
crea
se in
the
no
. of
win
d tu
rbin
es
199
2
199
3
199
4
199
5
199
6
1997
199
8
199
9
20
00
20
01
20
02
20
03
20
04
20
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20
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20
09
20
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12
Cu
mu
late
d n
o. o
f w
ind
turb
ines
Reduction in no. of turbines
New onshore projects: no. of turbines
Offshore wind energy: no. of turbines
Repowering: no. of turbines
Cumulated no. of turbines
Wind energy expansion status Capacity in MW No. of wind turbines
Increase in 2012 2,415.16 998
From repowering (trend value, not binding)
From offshore wind energy (initial injection)
Reduction (trend value, not binding)
431.63
80.00
178.56
161
16
252
Cumulated values, 31 December 2012 31,307.60 23,030
From repowering (trend value, not binding)
From offshore wind energy (initial injection)
Reduction (trend value, not binding)
1,442.51
280.30
626.77
626
68
998
q Status of wind energy reduction on 31 December 2012 (data 1992-2011: DEWI)
q Annually installed wind turbines in Germany / Cumulated no. of wind turbines / Status 31.12.2012 (data 1992-2011: DEWI)
12 Projects / Construction + Technology
Densification and expansion: Two exciting wind projects in Broderstorf and Suderburg
Broderstorf
At the Broderstorf wind farm, close to the edge of Rostock, the last gaps are being constructed – sometimes known in the trade as »wind farm densification«. Here it is particular-ly important to get the very best out of the given conditions, i.e. the wind turbines already constructed by various manu-facturers.
The range of issues that have to be taken into account is con-siderable and extends from spacing requirements, construc-tion loads and height limitations to noise emissions and turbu-lence to the farm efficiency and expected yield from the wind turbines.
Since the eno 92 offers excellent performance, all stakehol-ders quickly realised that eno technology should be used at this site. With a measured sound power level of 102.4 dB(A), the two eno 92 turbines being deployed are among the quie-test wind turbines in this segment – which is a particularly decisive criterion when expanding existing wind farms.
The customer, who is an experienced planner and operator, particularly appreciates that eno energy not only supplies wind turbines but, as a general contractor, also looks after the entire infrastructure including the access routes, crane hardstandings, foundations, cable lines and the customer transfer station.
The logistic challenge with each wind energy project is to syn-chronise the delivery phase for the individual components for each wind turbine with the activities on the construction site. The aim is to achieve »just in time« deliveries, whereby the components arrive on the construction site just as they are needed to be installed.
Frank Köhler, Senior Sales Manager of eno energy systems, describes the short delivery time for the two turbines, which usually ranges between 12 and 15 months, as »sensational«. »The contract was signed after extraordinarily constructive nego-tiations in March this year. The financing was already in place by the end of August, which on balance corresponds to a 3-month delivery time. This was achieved above all through the intensive and pragmatic collaboration between eno and our customer.«
q Completion of the Stäbelow wind farm in november 2013
13The magazine for success with wind
Suderburg
Another interesting project in Suderburg (Rural District of Uel-zen in Lower Saxony) resulted from a cooperation begun in spring 2013 between eno energy and the project developer GETproject, which is now starting to come to fruition.
The Suderburg wind farm, which commenced operation in 2010 with four wind turbines, is now being expanded with an eno 92. The preparatory construction work has already com-menced. During the next few weeks the foundation will be poured and the grid connection made.
As with Broderstorf, the unusually short delivery time will enable the 2.2 MW wind turbine to already begin operation in December. »The quick and customer-oriented coopera-tion, but above all the shorter-than-average delivery time for the turbine , has made it possible to already commence operation this year,« praises Neithardt Kempcke, the respon-sible project manager at GETproject, in describing the goal-oriented collaboration with the Rostock manufacturer.
Approval for the fifth wind turbine was granted at the end of 2011. An eno 92 wind turbine will be constructed with a hub height of 103 metres. It was only through the very close collaboration between the sales and project management that it was possible to accord with the high quality stipulations.
Both in contractual and (grid-related) technical terms, eno energy succeeded in meeting the high demands the GETpro-ject placed on it as the contractor.
Neithardt Kempcke was particularly impressed by the coor-dinated construction process at the site: »The very well orga-nised execution by the project management ensures that we can begin operating the wind turbines on schedule.«
With a capacity of 64.5 megawatts, GETproject’s seven wind farms installed in the Rural District of Uelzen can in prin-ciple supply almost the entire area with clean electricity. Further projects are being prepared, for which negotiations are being conducted with eno energy for the delivery of wind turbines.
Staff from almost all areas of the eno energy group are now employed at the Rerik site. This houses parts of the Wind & Site, Research & Development, Accounting, Operations Management, IT and Production Planning areas. Production areas for self-developed electronic components have also been recently established here.
For example, work has begun in one of the production sheds on manufac-turing the top boxes for nacelles as well as switch cabinets for tower feet. The mass production of pitch sys-tems has also begun. With the inno-vative eno pitch.control® rotor con-trol system, ultracapacitors are being used instead of lead batteries, which accordingly lengthens the service life, saves weight and dispenses with the need for heating. In addition, two inver-
ters will be deployed per rotor bla-de. This means that, even if one inver-ter fails, it will still be pos sible to move the blade into a safe feathered posi-tion. The blade drive is powered by maintenance-free, light asynchronous motors – consequently without perma-nent magnets.
eno energy increases production depth
In addition to the economic benefits, eno energy is hoping that the gradual incre-ase in self-production will also impro-ve the service quality. By activating its headquarters in Rerik as an additional production site, eno energy is creating more capacities for the production and further jobs in the region.
q Installing the new switch cabinets
14 Construction + Technology
In the 02/2013 issue, eno mag reported about the introduc-tion of eno’s own rotor blades, the challenges faced with the dimensioning and the special features of the blade design. eno has meanwhile made considerable progress and is on the ver-ge of that exciting moment when the first eno blade 56 set – or EB56 for short – will revolve on a pro-totype of the new 3.5-MW platform.
Tilo Veit, project manager for rotor blade production at eno energy sys-tems GmbH, has accompanied the rotor blade development from the beginning. »Things have really started to move since it was confirmed at the end of April 2013 that the EB56 can be used on a prototype for the eno 114 wind turbine and that produc-tion is up and running.«
Before beginning the extensive testing and certification pro-cess, the test blade was first of all produced from a new mould. As with the blades in the mass production, it is made of glass fibre-reinforced plastic and is manufactured using half-shells as part of a sandwich construction method. The internal structural framework acts as a brace for absorbing compres-
sive and tensile forces and as a stiffening web. Renowned engineering and consultancy companies who work for the most successful German wind turbine manufacturers have continually monitored the overall production and have appro-ved the individual milestones in close coordination with eno,
ranging from the brace approval and the shell bonding to the geometric measurement.
»The test blade was produced in accordance with the blade specifica-tion and meets all mandatory require-
ments,« explains Veit, who is a mechanical engineer. »How-ever, the quality requirements for our own structures go even further. That’s why we’re particularly proud that our blade has turned out so light. In addition to the positive cost effect, this also relieves the weight on the rotor hub and bearings. Further-more, the aero-acoustically optimised blade shape will make the eno 114 one of the quietest wind turbines on the market.«
Germanischer Lloyd Industrial Services/Renewable Energies was commissioned to certify the eno rotor blade. This com-prehensive process includes checking the design and calcu-
Time that things begin to turn: eno reaches the final straight on route to achieving its own rotor blade
q test assembly for the eno blade 56
»We’ve been carrying out tests on rotor blades
for almost 30 years«
15The magazine for success with wind
lation documents, assessing the execution of the structural requirements in the production and assembly (IPE) as well as conducting the blade test.
The blade test forms the central component of the certifica-tion process and is being conducted at WMC in Holland. The renowned institute, founded by the Delft University of Tech-nology (TUD) and the Energy Research Centre of the Nether-lands (ECN), specialises in material research and the testing of glass fibre-reinforced plastic for the wind industry.
»We’ve been carrying out comprehensive tests on rotor bla-des for almost 30 years,« explains Maaik Borst, who works as a research scientist at WMC. »The 56-metre-long eno blades are among the largest blades on the market, which is why a comprehensive test procedure is being conducted.«
An important component of the blade test are the structural tests conducted on the rotor blade in all four directions, whereby the rotor blade is tested in two different directions in both the edge-wise and flapwise directions. These tests will be followed by the fatigue and concluding post-fatigue tests, where the materi-al fatigue will be tested in detail. The entire process is scheduled to be completed by the beginning of 2014 and sealed with the receipt of the certificate from Germanischer Lloyd.
»The rotor blades are subjected to extreme duress during the tests,« explains Maaik Borst. »We operate the blades with 2.5 million load changes so as to simulate the operational ser-
q Delivering the test rotor blade at WmC
vice life.« During the structural test extreme loads are applied, such as only occur with extreme wind gusts or emergency stop procedures. »This causes the rotor blades to bend by up to twelve metres near the rotor tips, which corresponds to a weight of about 30 tonnes on the blades,« adds the scientist. In addition, the strain is measured at more than one hundred strain measurement points distributed along the blade.
Borst’s colleague, John Heijdra, the Technical Project Mana-ger at WMC, praises the excellent cooperation between all the players. »We’re very satisfied with the excellent collabo-ration between eno and WMC in the test preparation phase and the excellent project management from Tilo Veit. An opti-mal test setup has been achieved as part of a step-by-step process between all participants.«
»It was only when transporting the blade from the manufactu-rer to the tester that the coordination didn’t quite go to plan,« says Tilo Veit with a wink. »Unfortunately, a few forgotten steel plates for the lorry wheels meant that the lorry got stuck in the ground just before reaching the WMC site. However, thanks to our Dutch partner’s improvisation skills, the prob-lem was quickly solved.«
About 20 blade sets are scheduled to be produced next year. The next major challenge is expected in the middle of 2014. WMC will then begin testing the even larger EB61.6 rotor bla-de, which has also been developed by eno and will be used with the sistor of eno 114, the eno 126.
16 eno international / eno mix
Outside there is typical British weather – it’s raining – on the inside there are lively discussions with project developers from England, Wales and Scotland. At eno energy’s trade fair stand at the National Exhibition Centre, Birmingham, a five-member eno team presented the new eno 82 – 1.5 MW wind turbine, which has been specially developed for individual sites in the UK with average wind speeds of 8.5 m/s.
eno team with the new eno 82 - 1.5 MW in Birmingham
segment, eno wants to exploit the previously little utilised range between 500 KW and 1.5 MW.
This is because in accordance with the English saying »Don’t put all your eggs in one basket«, project developers and inves-tors are now looking for alternatives to the 100-500 kW tariff class. Here it is not just the uncertainty regarding the reduction in the feed-in remuneration that is playing a role, since in this case the argument fully applies that, despite the lower remune-ration, there are greater yields across a 20-year period in the tariff range between 0.5 and 1.5 MW. The discussions have also shown that project developers have simply not been able to find wind turbines that are technically mature and adapted to the wind conditions here.
Therefore many interested customers praised the fact that the 1.5 MW turbine offers a high annual full-load rating and is available with flexible hub heights. Particularly the tower version with a 59-metre hub height – which is also available with 80 metres – met with considerable interest, since at many sites it is not permitted to build above 100 metres. The wind turbines are equipped with a fully fledged, high quality 1.5 MW generator that secures the tariff accreditation in the UK and ensures one hundred per cent investment security.
The sales team won additional brownie points for the success-ful nacelle design and the service offering. For example, eno energy will also offer to install the wind turbines and, by const-ructing service stations, look after the maintenance of the turbi-nes through trained, on-site service teams.
»One indicator that we are on the right way is that quite a few project developers have several projects in the pipeline with which the 1.5 MW turbine can be deployed. We therefore now have the perfect turbine for this in our portfolio,« sums up eno Sales Manager Helmut Lange, and he adds that, in addition to the 1.5 MW turbine, the very powerful eno 114 with 3.5 MW and a 92-metre steel tower also brings with it the best attribu-tes for the UK market.
Energie Eolienne France (EEF), a subsidiary of the eno energy group, have recently opened a second office in Paris. Eric Sauvaget, French Country Manager, and his team consisting of three employees are currently working on projects in northern France and Belgium. With 60 MW in the pipeline, expanding business activities in the area of project develop ment and implementation are the top priorities. By 2015, EEF plan to build up to ten wind turbines in Brittany. Owing to increased interest in eno technologies, whose benefits are becoming increasingly significant for the French market, the team led by Eric Sauvaget is also set to intensify sales and marketing activities in 2014.
Office opening in Paris eno further expand activities in France
q In interview: Sales manager Helmut Lange
RenewableUK – this year hosted in the old industrial city in the West Midlands – is the leading trade fair for renewable energies in the United Kingdom, which was also reflected by the pre-sence of the market leaders among the wind turbine manufac-turers. In contrast to their focus on large wind farms or the pre-vious focus by other manufacturers on the small wind plant
17The magazine for success with wind
Underway with the wind or how wind energy has taken to the road
It is not true that it always rains in Hamburg: the days are often far too nice to be travelling to meetings by car. That is why many of the sales staff in Hamburg like taking the bike – the eno e-bike to be more precise. This in-house develop-ment has been designed with a considerable love for detail, with particu lar attention paid to the high quality of the compo-nents. For example , the exclusive frame design enables the portable lithium- ion batteries to be integrated harmoniously in the aluminium frame – while also making a visual nod to our company logo , a wind turbine rotor.
»For us as a manufacturer of wind turbines it is important to show that renewable energies can be combined with electro-mobility. We want to drive forward the energy revolution and use electricity in a sustainable manner. For this reason, in sum-mer 2012 eno energy sytems GmbH gave the go-ahead for the development of its own electric bike,« says Frank Riemer, Sa-les Manager at eno energy systems GmbH, in summarising the initial idea to have their own e-bike.
He spends a lot of time underway on the new two-wheeler: »Hamburg is excellent for cycling, although having to stop all the time at the traffic lights is annoying. The additional ener-gy that the e-bike provides when accelerating makes it ideal for quickly and easily weaving through the city’s stop-and-go traffic. Even longer distances that would have been previously
made by public transport or car seem just a stone’s throw away with the e-bike.«
The Streetster Cruise is a real eye-catcher: people turn their heads when you cycle through the city on the bike. This touring version is driven by an infinitely variable NuVinci ge-ar hub combined with a belt drive system and a centrally-mounted, high-performance 36V/250W motor. Via the Ga-tes low-friction belt drive, the power is transferred quietly to the rear wheel where it is child’s play to adjust the gears in all situations. That is particularly impressive when you ride the bike for the first time.
»The eno-bike makes it easy to give a greater emphasis to sustainability. This is how we can also shape tomorrow’s world: simply leave the car at home and use the bike to get to meetings or embark on longer tours in your free time – with the e-bike it’s easy without getting out of breath,« says the delighted 29-year-old.
A small series with almost 40 bikes has already been produced; next year the follow-up series will be launched on the market at a cost of about 3,500 euros per bike. These shall be sold throughout Germany and also raise the profile of the turbine constructor as a brand. Everywhere where the bikes are un-derway, customers ask for a test ride and are thrilled by them.
q riding to work with the eno e-bike
18 eno mix
Sailing close to the wind - right on the pulse of the industryeno establishes Rostock Wind Energy Forum as a key industry event
With more than 300 delegates, the 2nd Rostock Wind Energy Forum was held in the Neptun conference hotel in Rostock-Warnemünde on 9th August 2013. The event therefore surpassed all expectations and has already esta-blished itself in its second year as an important neutral knowledge forum for onshore wind energy in the north that brings together representatives from politics, business, industry and research.
The host and initiator of the event was eno energy. Its project manager, Kath-leen Zander, had her work cut out wel-coming the delegates and organising them into the three knowledge forums on Technology + Innovations, Planning and Funding. In each forum, five spea-kers brought with them highly interes-ting presentations on current issues ranging from new public share partici-
pation models to innovative tower deve-lopments.
The event was opened by the incum-bent Energy Minister for Mecklenburg-Western Pomerania, Volker Schlot-mann. He emphasised the regional government’s particular commitment to the wind energy industry as an impor-tant economic factor and its intention to create favourable underlying condi-tions for the further expansion of wind energy turbines. At the same time, how-ever, he urged that all players active in the industry should involve the public in their activities to a much greater extent than was previously the case and thus improve public acceptance.
In her welcoming address, the Presi-dent of the German Wind Energy Asso-ciation (BWE), Sylvia Pilarsky-Grosch, also referred to the industry’s continu-
q Forum at the 2nd rostock Wind Energy Forum
ally growing importance to the economy: »Wind energy can take on a flagship role for many industrial sectors. Furthermore, when a good economic policy positively supports corporate decisions, the whole country benefits.«
However, when it came to the pub-lic acceptance of wind energy, Syl-via Pilarsky-Grosch threw the ball back into the government’s court. »In gene-ral it can be said for all renewable ener-gies that we wouldn’t need to fear any comparison with conventional fuels if the external costs were at last honestly fac-tored in. Wind turbines can be removed without trace; the everlasting burden of nuclear energy can – as the name sug-gests – never be removed.«
Several of the invited experts also addressed the government’s current approach to handling the energy turna-
19The magazine for success with wind
round, whereby it became clear that the acceptance for the energy turnaround was currently being endangered by spe-cific factors. In particular these inclu-de an EEG Act that will be without any steering effect if no progress is made in regulating the expansion of renewables in conjunction with a reduction in con-ventional power plant capacities.
»Wind energy should be created where it is sensible and is wanted,« said event moderator Stephan Schröder in adding to the acceptance debate. »That’s why the early involvement of all stakeholders in the planning process is essential.« However, the managing director of Notus Energy sees the greatest problem when planning wind farms in the lack of sci-entifically founded nature conservation expertise and demanded: »Species con-servation must be better organised and implemented as a whole. In this regard universities and organisations can provi-de help and contribute to a more factu-ally grounded public dialogue.«
Beyond the discussion on energy policy issues, enough room was provided for presenting funding topics, planning solu-
tions and technical innovations. Project manager Zander was very satisfied with the quality of the symposium: »We had a wealth of highly informative lectures in our three knowledge forums.«
Thorsten Herdan, managing director and energy policy spokesman for the Asso-ciation of German Machinery and Plant Manufacturers (VDMA), is on the whole confident about the future. »The German wind industry is very well placed in a dif-ficult global market. The first six months of 2013 showed a positive trend, not just
Some customers or partners of eno energy might have already noticed: the company is now wearing a fresh, new outfit and has fully revised its corporate design.
The base colour for brochures, busi-ness cards, roll ups and compa-ny cars is now an elegant and bright shade of grey. In addition, there is the well-known bright eno red, which will be used in a more economical and accentuated way in the future.
The logo, no longer with dots and thus is easier to write, is now com-bined with the type designation on
new turbines. Even a layman will be able to distinguish an eno 82 with a high tower from an eno 100.
However, the nacelles will retain their base colour of white, which is spe-cified by the applicable guidelines for day and night marking of aviation obstacles.
One of the first measures in the new design was redesigning the eno website , which has already been ensuring an adequate online repre-sentation for several months now. All other individual measures are being worked on relentlessly so that
the company will be able to present its new dress in 2014.
eno in a new dress
q Sailing cruise on the Baltic Sea
for the German market but also globally. In future it will be particularly impor-tant to increase the quality of wind pow-er. This is where technical solutions are called for that make electricity availab-le on demand. The Wind Energy Forum in Rostock was precisely the right forum for this discussion and I look forward to its continuance in 2014.«
The event came to a glorious end with an evening cruise on the Baltic Sea, which lasted for several hours. All the forum delegates were invited to the event, which was held on two large sailing ships with music and catering and excellent sailing weather. »The mix of current expertise and a certain exclusiveness that fosters personal dis-cussion makes the Rostock Wind Ener-gy Forum unique, particularly in view of the Hanse Sail regatta that is taking place at the same time,« explains Kathleen Zander , who has already scheduled the follow-up event for 8th August 2014. This will coincide with eno energy’s 15th anniversary. »Delega-tes can therefore already look forward to several special surprises,« promises Kathleen Zander.
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