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!
