||Mikrokraftvarme i Danmark : Driftsstrategier og økonomi
||Larsen, Esben (Electric Power Engineering, Department of Electrical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||Many studies of CHP- technology in Denmark have shown that there still is a big potential for installation of such units in isolated regions (without connection to the public district heat system).Heat supply in those areas is today served by individually heating of the houses with oil burners. Electricity is bought from a local energy supply compa-ny. Here, micro combined heat and power production (CHP) gives a possibility for decentralized heat and electricity production, with better usage of energy. The aim of this project is to investigate how we can make CHP technology more economically feasible for owners of ordinary family houses in Denmark. Micro CHP unit from German SenerTec (DACHS) is used in all analyses of this project.
In the first stages of this project there is a short introduction on Micro-CHP, technical specifications of DACHS unit and its installations principles.
In the second part of this project I have made an investigation to find out which taxes should be paid when micro CHP plant is installed, are there any subsidies for electricity generated by combined heat and power plants (CHP), and which low requirements should be fulfilled. I have developed 6 operating strategies for CHP unit, and they have been analyzed. The analyses were carried out to identify the operations strategies that give the highest value for the electricity production from the CHP unit. I found out that the most feasible operating strategy is electricity based operation strategy (CHP unit is always operating when we have highest electricity demand in the house) together with possibility of el accumulation, where (V2G) car is used for the electricity storage. Self- supply of electricity was in the range of 93 %. Simulation results of those strategies where used for economical evaluation of CHP unit.
Those evaluations where compared with economical evaluations of oil burner. A comparison has shown that it is better to invest in oil burner then in a new micro CHP unit. That is because the price of micro CHP unit is higher than a price of oil burner, but also because of a heavy taxation sys-tem in Denmark. But if it was possible to change some of the settlement rules ,like get-ting a support when buying micro CHP unit and getting a good prices for electricity (when selling), then micro CHP unit was be the most feasible technology the user could choose (compared with oil burner). In the end of this rapport I have seen on how I can regulate CHP unit’s electricity production on the basis of price signal. If owner of such units should sell electricity on marked terms and still earn some money, the settlement rules should be changed.
Creation date: 2009-05-07
Update date: 2009-05-07