Objective
To develop a multi-source energy system so that a community on a Danish island could supply itself with district heating and electricity on a cooperative basis by using renewable energy sources.
The complete plant started operation in November 1988. The plant is now providing 90 % of the district heating requirements at the town of Aeroeskoebing as well as a considerable part of its electricity demand.
During the period December 1988 till July 1989 the plant supplied 5,652 MWh to the district heating network and during the period March 1989-July 1989; 269731 kWh of electricity were sold to the local grid.
The plant provides the local community with cheapper and cleaner energy than that formerly provided by fuel oil. Untill 1st August 1989, the combined plant had substituted 3,572 tons of fuel oil and generated electricity which would have otherwise been produced from coal. This has spared the environment the effet of 3.57 tons of sulphur.
Several renewable energy sources are used in this project to provide the hot water needs of a district heating system. Three windturbines also produce electricity for sale to the local electricity company. The combined energy plant consists of a 1600 kW straw burning boiler, a 325 kW electrically driven heat pump, a 140 kW disel generator, two 200 kW and one 75 kW windturbines, 1000 m2 solar panels and heat accumulation tanks totalling 235 m3. The straw burning boiler is the largest heat producing part of the system and produces approximately 60 % of the plant's total heat production.
The heat sources for the heat pump are : the 1000 m2 solar panels, a flue gas condenser on the straw boiler, flue gas condenser on the diesel generator and a space cooler in the engine room.
The diesel generator is used to provide electricity for the heat pump and ancillary plant during periods when the windturbines are not operating. The diesel generator is also run during periods of peak electricity tariffs to produce electricity for sale to the electricity company.
The three heat accumulation tanks increase the possibilities of running the three main components, straw burning unit, heat pump and generator independently of one another.
An advanced automatically monitoring system controls, regulates and makes daily and monthly reports.
Programme(s)
Topic(s)
Call for proposal
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DEM - Demonstration contractsCoordinator
5970 AEROESKOEBING
Denmark