Good practice examples on heat use of biogas plants in Denmark
Transcript of Good practice examples on heat use of biogas plants in Denmark
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Good practice examples on heat use of biogas plants in Denmark
European Workshop on Heat Use from Biogas Plants –Vienna, Austria, June 12, 2013
Laura Bailón Allegue, Danish Technological Institute
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Biogas in Denmark
Agricultural biogas plants in Denmark:
22 centralized biogas plants ~ 1 – 4.5 MW
60 farm biogas plants ~ 0.25 – 1 MW
Total production in 2011: 4.1 PJ
46% from centralized plants
27% from farm plants
Agricultural biogas plants treat:
2 ½ mill. ton manure (5% total
manure)
½ mill. ton organic waste
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Biogas Heat use in Denmark
In all centralized biogas plants heat is used in internal process and in district heating networks. 2 models:
CHP integrated in the biogas plant – heat sell to DH company
Biogas sell and transported to a district heating CHP plant
In the farm plants heat is used in internal process and in:
District heating networks when possible
Heating the stables or building/houses in the proximities seasonal variation winter/summer
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DH in Denmark
60% population is warmed by district heating. And ~ 80% district heating is produced in combined head and power plants
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Lemvig biogas plant
Built in 1992, major renovation 2008
Owned by a farmer privately owned cooperative
Treats 615 ton/day (82% manure from ~75 farms and 18% organic waste)
Biogas production: 8.5 million m3/ year (2011)
10.2 million m3/ year (2012)
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Lemvig biogas plant
4 digesters with a total capacity of 14,300 m3
RT = 26 days (53 oC)
Hygienization step after the digester
Inlet manure is heated with the hot digestate after the hygienization
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Lemvig biogas plant
Inlet manure Digestate
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Lemvig biogas plant - biogas/heat use
Lemvig DH plantKlinkby DH plant
Lemvig biogas plant
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Lemvig biogas plant - biogas/heat use
Most of the biogas is sold and transported 4.3 km to the Lemvig decentralized heating plant.
CHP Ulstein-Bergen : 2050 kWel (~ 2.2 MWth)
~18.5 mill kWh heat /year is used at the city ofLemvig (~ 1000 houses)
Part of the biogas is used in a 1560 kWel Caterpillar biogas engine to cover the plant heat internal demandUntil 2013 it was used a 836 kWel/968 kWth CHP Jenbacher unit
Internal heat demand: 3,500 – 4,000 MWh
Since 2011 part of the biogas is sent to the Klinkby district heating plant (8 km) and burnt in a 889 kWel Jenbacher CHP at the Klinkbydecentralized heating plant.
In 2012: 5.6 mill kWh heat /year was produced and used at the city of Klinkby ( ~ 300 houses)
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Thanks for you attention!
European Workshop on Heat Use from Biogas Plants –Vienna, Austria, June 12, 2013
Contact:Laura Bailón Allegue, Danish Technological InstituteEmail: [email protected]