group project co2 neutral e-mobility

Falera, August 23 - September 5, 2009First International Summer University on Energy: Renewables

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CO2 Neutral E-Mobility

ISUenergy project group no. 2

Sanem Genc (Turkey)Christina Braun (Switzerland)Julius Kühn (Germany)

Evelina Kompare (Slovenia)Cagdas Karakurt (Turkey)Christina Kontaxi (Hellas)


2Overview

The Flyer Bike experience

Ideas and Aims of our Project- Infrastructure- Energy Source- Social Acceptance

PV Integration: Off-Grid and Feed-In

Summary and Ideas for Financing


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Product specifications:

• Autonomy ~ 30km• Engine has pedaling top speed of 25km/h• Price of bike including battery: ~ 2000 EUR

Battery specifications:

• 10 Ah Lithium-Ionen Mangan, 26 V. • Charging time 3-6 h • Weight: ca. 2.6 kg• Life time: ca. 500 charging cycles, 3-4 years

OverviewThe Flyer Bike Experience (1/9/2009)


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Target Group:Mainly targeted to tourists

Summer season (May to September)

Infrastructure:5 flyer rental stations

7 hotels with flyer bikes

15 batteries exchange stations (hotels, restaurants)

Disadvantages: - not always 24hrs/day availability

- charging of batteries is dependent from the grid, at the specific charging

stations

IntroductionCurrent State of Flyer Bike Flims-Laax-Falera


5Flyer Electro Bike map


6Idea and Aim of the Project (1/2)

Build on the existing Infrastructure… … but make it more flexible and cleaner

Expand the Infrastructure:Keep current stations (5 flyer rental stations, 7 hotels with flyer bikes) and expand the 15 battery

exchange stations to a total of 30 stations located at bus stations

Advantages: + Increase of the availability of charging stations

+ Increase of the visibility of the Flyer electrobike

+ Increase of the mobility of the users

Use the Sun as the Source of Energy:Replace the grid dependent charging stations with a dual strategy of PV integrated systems:

1. off-grid charging stations at the bus stops

2. charging stations with PV modules, connected to the grid for the larger charging stations

Advantages: + Clean, CO2 neutral mobility

+ Abundance of energy source

+ For larger stations: possibility of feed-in solar energy to the grid


7Idea and Aim of the Project (2/2)

Expand the Target Group:Make the charging station available for the local population for them to use with their own

electro bikes!

Example: use a card with integrated chip to open the charger stations at the bus stops

Sell subscription to the locals who own an electro bike to use the stations along with the

tourists who rent the bicycles

Value Added to the Region:The Flims-Laax-Falera region has an overcapacity of beds in the summer

Interest to attract more tourists during the summer

Advantages: +The clean mobility concept – powered by the sun – has the potential to

attract more environmentally conscious tourists

+ The clean mobility concept will add to the current commitment of the

region to use more environmental-friendly solutions (see “Grünbünden” on

the bus)

+ The charging stations will increase the mobility of both tourists and the

local community, as well as the number of users!

+ Interesting and innovating solar architecture of PV bus station


8PV Integration I: Off-Grid Charging Stations @ Bus Stop (1/2)

Off-Grid Charging Stations at the Bus StopInstall charging station at the 30 Bus stops in the Flims-Laax-Falera Region with 3 batteries

using Solar Energy only to charge the bike


9PV Integration I: Off-Grid Charging Stations @ Bus Stop (2/2)

Schematic Overview


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Average solar Irridation 408.31 Wm2

PV Cell First Solar 75W Thin Film CdTeEfficiency: 10.7%

Nr of Batteries in Charger

3 batteries

Average charging time 6hrs per battery

Energy needed to charge the System

256 Wh/m2 x 3 batteries = 768Wh

Area needed for PV 2.93m2

Power installed 300W

Total Cost of one Charging Station

3 EUR per Wp installed= 900 EUR + 100 EUR for storage batteryTotal 1000 EURInfrastructure Bus Stop is not included

Cost of 30 charging stations

30´000 EUR

413,24

424,82433,22

405,8

364,49

408,31

Solar Irridation in W/m2 - Falera

Calculations for Off-Grid Charging Stations at Bus Stations (1/2)Estimated global irradiance in Falera by PVGIS*

*http://re.jrc.ec.europa.eu/pvgis/apps3/pvest.php#


11Calculations for Off-Grid Charging Stations at Bus Stations (2/2)

For the system that has 3 charger : Average solar radiation during summer season in Falera : 408.31 (W/m2) We use First Solar 75 W solar panel with %10.7 eff. (120cmx60cm =0.72 m2) Electrical Input : 408.31 (W/m2) x %10.7 = 43.69 (W/m2) Average charging time : 6 hours per battery Energy that we get from sun : 43.69 (W/ m2) x 6 hours = 262.14 (Wh/m2) Energy that we need to charge system : 256 (Wh) x 3 (battery) = 768 (Wh) Area that we need : 768 (Wh) / 262.14 (Wh/m2) = 2.93 (m2) Power that we need : 2.93 m2 x 43.69 W/ m2 = 128.01 W (2 PANELS) Power that we need to install : 2.93 m2 / 0.72 m2 = 4.07 (4 PANELS)4 x 75 W = 300 W


12PV Integration II: Grid-Connected PV Charging Station

Schematic Overview


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413,24

424,82433,22

405,8

364,49

408,31

Solar Irridation in W/m2 - Falera

Calculations for Grid-Connected PV Charging Station (1/2)Estimated global irradiance in Falera by PVGIS*

Average solar Irridation 408.31 Wm2

PV Cell First Solar 75W Thin Film CdTeEfficiency: 10.7%

Nr of Batteries in Charger

10 batteries

Average charging time 6hrs per battery

Energy needed to charge the System

256 Wh x 10 batteries = 2.5 kWh

Area needed for PV 9.77m2

Power installed 1050W

Total Cost of one Charging Station

3 EUR per Wp installed 3000 EUR

Cost of 12 charging stations

36´000 EUR


For the system that has 10 chargers : Average solar radiation during summer season in Falera : 408.31 (W/m2) We use First Solar 75 W solar panel with %10.7 eff. (120cmx60cm) Electrical Input : 408.31 (W/m2) x %10.7 = 43.69 (W/m2) Average charging time : 6 hours per battery Energy that we get from sun : 43.69 (W/ m2) x 6 hours = 262.14 (Wh/m2) Energy that we need to charge system : 256 (Wh) x 10 (battery) = 2560 (Wh) Area that we need : 2560 (Wh) / 262.14 (Wh/m2) = 9.77 (m2) Power that we need : 9.77 m2 x 43.69 W/ m2 = 426.85 W (6 PANELS) Power that we need to install : 9.77 m2 / 0.72 m2 = 13.57 (14 PANELS)14 x 75 W = 1050 W

14Calculations for Grid-Connected PV Charging Station (2/2)


15Summary and Ideas for Financing

Total CostsFor off-grid bus stations: 30´000 EUR

For larger PV modules with feed-in option: 36´000 EUR

Total InstallationsOff-grid bus stations: 30

PV modules with feed-in option: 12

Total CapacityOff-grid bus stations: 9´000 W

PV modules with feed-in option: 12´600 W

Total 21´600 W

Financing Possibilities - Flims Laax Falera Tourismus AG

- Sell subscription for charging stations to the locals

- Generate revenue from feeding-in solar energy to the grid

- Support from the canton Grünbünden?


16Further Ideas

Expand renewable energy sources on the bike

•Integrate dynamo systems for downhill on electro-bikes for the expansion of the off-grid system •PV system on the bike

Expand the Reach

•Study for expansion of the system in remote regions •Expansion of the system introducing larger charging stations

Raise Awareness

•Bus stations as space for rising awareness about solar energy and alternative mobility, e.g. “Waiting for the bus? Use a solar-powered e-bike!”


Thanks for your attention…

… Questions?

17Get on the solar E-Bike!

group project co2 neutral e-mobility

Technology

grid charging stations

charger stations

current stations

charging time3

charging cycles

bus stations advantages

larger stations

flyer rental stations