www.renewables-made-in-germany.com

Geothermal - Uses for small buildings, quality standards and trendsLeonhard Thien, EnergyAgency.NRW / North Rhine-Westphalia

AHK Geschäftsreise, Slowenien, 12.05.2015

www.renewables-made-in-germany.com

AGENDA

EnergyAgency.NRW, Geothermal Energy Network

Introduction to the topic

Uses near-surface systems/examples

Quality Assurance / Quality Standards

Trends / Perspectives

Summary

What is the State‘s Energy Agency Offer ?

Information and Communication• Working groups, business contact forum, conferences,• organisation of future energies symposia

International Markets• Participation in national and international conferences and trade fairs,• NRW Energy Conferences E-World Energy & Water (Essen),

Hannover Industry Fair,

Public Relations Work

• Internet, magazine, brochures, news service, press releases• industry atlas for future energies

Projects

• Initiation of projects, looking for project partners, • support in the realisation stage

The Geothermal Energy Network NRW

The Networks objectives are as follows: development and publications an expansion

strategy for Geothermal exchange of information in order to continue the

Development of joint ideas Initiation of projects Development of components in the geothermal energy sector Opening up of new markets The safeguarding and sustainable creation of jobs Settlement of companies Intensification of national and international co-operation

Primary Energy Consumption in GER 2013, Total: 14.000PJ

Import Dependency of German´s Energy Supply

Heat Pump Market in Germany and NRW

2014 in operation:Germany 620.000 NRW 125.000

2014 in operation:Germany 620.000 NRW 125.000

to 20302,0 Mio Heat Pumps in Germany400.000 Heat Pumps in NRW

to 20302,0 Mio Heat Pumps in Germany400.000 Heat Pumps in NRW

Use of shallow geothermal energy

Providing heat• Focus: heating buildings usually using heat pumps• subordinate: Ice prevention of traffic areas, agriculture and fish farming,

swimming pool heating

Providing Cooling• Air conditioning of buildings• direct cooling• Active cooling using heat pump / chiller

Heat and cold storage• seasonal storage• Storage of solar heat or waste heat from industrial and power plant processes

Shallow Geothermal Energy

75% of the heating supplies the earth for free!

Geothermal haet collectors Geothermal heat probes Groundwater heat pumps

Geothermal heat collectors with heat pumps

Collector fielddepth ca. 1.50 m

Brine/Water Heat pump

Buffer store

Design ca. 2.5 x of heated area !

Geothermal Probe Heat Pump

geothermal probe ca. 100 m depth

brine/water-heat pump

buffer store

Closed system

Circulating carrier fluid

usually glycol

Depths ~ 100 m

By far the most

widely used

Groundwater Heat Pump

extraction wellsdepth 10 – 30 m injection wells

depth 10 - 30m

Groundwater flow direction

Buffer store

Note: Whenever you´re in the groundwater zone, you need a water legislation permet!

groundwater heat pump

Alternative Heat Sources

Source rigth: Bilfinger Berger Spezialtiefbau

Source left: erdwaerme-info.de

Family house Wesseling near Cologne:Floor area: 230m²Building renovation with heated floors3 probes a´100m depth10 KW heat pump, JAZ> 5.4Heating cost savings > 1000 €

Examples

Family house in Dortmund, BJ 1960:Living area: 150m²Building renovation with heated floorsKfW Efficiency House 85 (primary energy demand 72.5 kWh / m² a)1 probes 120m depth6 KW heat pump

117 single-family homes in Wuppertal:117 heat pump, output 6 KWEach Houses one probes a´ 80 to 100m depthJAZ 4

28 single-family homes in Dusseldorf:Heat pump output 6-12 KWEach Houses 1 to 2 probes a 70 to 130m depthpassive cooling

Examples

Quality Standards in Germany

Why?

Prevention of groundwater and drinking water pollution

Information base for planning offices, companies, public authorities, consumers,

Planning tool for everyone involved

reduce negative impacts on underground, environmental and plant engineering

Updates are required! (State of the art)

new insights on materials, damage cases, new techniques

Modifications of legal foundations

Development of hydrogeological location information available to authorities and

planners

Quality Standards for Underground, Technique, Human

Geology / Underground

Technology

Human

Geology / Underground

HydrogeologyArtesian Conditions

Pressure DifferencesFlow Rates

GeologyGround Storied Structure

KarstificationDisruptions

hydrochemistrySalt Water

Beton Aggressive GWCO2-Rise

Technology and Operating

InstallationDrilling

PressingFilling

OperatingHeat Input

Cooling EntryProbe Material

Long Term Stability

LeakagePressing MaterialDecommissioning

Human (Design and Execution)

ExperienceTraining

Certification

DesignAvailable Basic Data

Regulations

ExecutionCompetition

Criminal Power

Goals of Quality Standards

Geology

Knowledge of the geological and hydrogeological

conditions

Preferred use of the upper storey goundwater

Adjusting the permission to

geological conditions

Technique

At the underground adapted drilling and

design

Professional dimensioning

Development of pressing materials

Human

Application of technical regulations / standards

Promote certification and training and call

for

Call for preservation of evidence

(Documentation)

Summary and Assessment

Each plant is an interference with the protected

assets: soil, groundwater and stone

It must be defined what impact are disadvantage

and which are acceptable

To the result must be adapted the permit

notifications, the certification procedures, the

Standards and the educational content.

Trends and Perspectives

Promotion program "Marktanreizprogramm " (MAP) of the Federal

Base promotion in existing buildings:

for geothermal systems with geothermal probes: min. € 4500,

other geothermal plants € 4000 (JAZ > 4 in residential buildings

and JAZ > 3.8 in non-residential buildings)

“Innovation-Promotion”: the case of particularly high efficiency

(JAZ: min. 4.5) can be increased by 50% the amount of funding.

“Innovation-Promotion” in new buildings:

At a JAZ of 4.5 and higher, the same funding rate as in the base promotion

in existing buildings (4000 € and above) applies.

Modulated heat pump

Source: Viessmann

Performance of the heat pump so far unregulated

Design capacity

Demand of the building

New: Heat pump Controlled by power demand

outside temperature°C

design temperature Heating limit

Trends and Perspectives

Heat pumps in combination with photovoltaics

Summary

Use of geothermal energy has a future, geothermal energy is a renewable

energy source.

The protection of groundwater has in Germany a general priority position.

A high quality in planning and design, in construction and in operation is very

important for an efficient heat pump system.

The technical progress (research and development) should be promoted.

The market needs new, innovative solutions (combination HP and PV).

Geothermal systems are also suitable as part of storage systems.

Geothermal systems are also suitable for air conditioning of buildings

(cooling).

www.renewables-made-in-germany.com

Überschrift

Leonhard Thien

EnergyAgency.NRW

Lennershofstraße 140

44801 Bochum

Telefon: 0234 / 32 10715

E-Mail: thien@energieagentur.nrw.de

Internet: www.energieagentur.nrw.de

Thanks for your attention!