BIOENAREA regional examples

Transition from fossil fuels to biofuels -Town of Elva district heating network

Martin Kikas, Jaanus UigaTartu Regional Energy Agency

Case study done by project Woodenergy

Kozani, 21 of November 2012

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District Heating in Estonia

• 60% of the population used DH

• 70% of heatenergy consumption in DH

• 151 out of 226 local municipalities

• 287 boiler houses

• >1447 km of DH pipeline

Natural gas 44%

Wood fuels 25%

Data 2010, According to National Audit Office Estoniaand Statistics Estonia

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District Heating in Estonia

Average price of MW·h of heat 60 €/(MW·h)

Median price of MW·h of heat 74,5 €/(MW·h)

For smaller companies – 70% of costs is made on fuels

(natural gas; shale oil)*

Data from august 2012

*Estonian Competition Authority. Aastaraamat 2011.

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District Heating in Elva

• Managed by OÜ Elva Soojus

• Shares 100% owned by town of Elva

• One DH network divided between 3 gridsoNooruseoKirdeoHaigla

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DH in Elva: Boiler Houses

Boiler House Biomass OilBoiler House

Biomass, MW

Oil, MW Annual production, MWh

Nooruse 4 5,8 10400

Kirde 1,3 1,5 + 1,5 3600

Haigla 0,75 0,5 + 0,5 1200

Enics 0,87 + 0,75*

Not known

* only used when it’s not the usual heating period

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DH in Elva: Distributing Network

Boiler House Biomass OilDH Network

Lenght of pipeline, m

Heatable surfaces, m2

Consumption, MWh/year*

Losses, MWh/year*

Kesklinna 2*3432 59817 9502** 940**

Kirde 2*1358 19030 3209 441

Haigla

Total

2*140

2*4930

3202

82049

1092

13803

179

1560 11,3%

* Calculated from the hourly temperature data of 2010, that has been normalized using base degree days** For the Kesklinna heating network, the actual full year data was not available, therefore the estimated values are used.

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The amount of woodchips needed, m3/a

29118,6

The amount of shale oil needed, t/a 25,2

Heat energy production to DH network MWh/a

15362,4

Heat losses, % 11,3

DH in Elva: Energy Production 2010

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Road to efficiency…Major investments

Investment Year of completion

Investment, EUR

Subsidy, %

Kirde DH pipeline I 2005 114 807 0

Kirde boiler plant 2006 327 666 90

Kirde DH pipeline II 2006 150 775 78

Nooruse boiler plant 2007 600 957 54

DH pipeline to Murumuna kindergarten

2008 42 769 0

Kesklinna DH pipeline 2011 703 909 50

Haigla boiler plant (to oil shale)

2000 46 655 41

Haigla boiler plant 2012 268 399 90

Total 2 255 938 60

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Major Investments: Conclusions

• 197,9 EUR per kW of biomass-fired boiler heat power output

• 205,3 EUR per m of DH dual pipeline

• 27,5 EUR per m2 of net heated surface

* The standard expenditures were not taken into account

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Conclusions, price 52,28 EUR/MWh

Conclusion, emission

Pollutant Total emission

t/a OIL-SHALE

Total emisson

t/a

NOx 9,6 7,0

CO2 4940 83+123

Heavy metals 25,5 kg/y 8,5 kg/y

In year 2010 in Elva was avoided 4734 t of CO2 em.

For chiping and transport of fuel emission is 8 kg CO2 /MWh

Conclusion, future perspective

•Different development scenarios to be sustainable:

more consumerscloser involvment in energy suply chain

connecting grids to one network CHPuse other renewable resources (solarenergy, ground –thermal energy etc )

Keep moving! Thank you!