The final product is a number of energy producing constructions based on the Stirling technique that will serve as demonstration objects. This includes the technical constructions and an economical and technical evaluation of the system. In such a system heat is produced for heating the house and at the same time production of house hold electricity. The need for energy supply varies over the year. Since heating of the house in this case is the regulating factor for the total energy production, there will be a temporary excess of electricity during the cold season and during the summer the Stirling is turned of and electricity has to imported.
The Sterling, which is the core of this concept, is an old construction but has some advantages compared to other systems. For example:
- It can produce heat (75%) and electricity (25%) simultaneously (CHP, combined heat and power generator). The basic Sterling technology can also be used to produce cool (a cryo-cooler) provided that mechanical energy is added to run the engine.
- All kinds of fuels can be used e.g. wood pellets, peat, methane gas, solar irradiation, etc. which makes it possible to use local resources. Particularly systems driven by solar radiation are developed.
- Low emissions of air pollutants.
- The engine is silent which makes it possible to use in urban areas if needed.
- Few moving parts and little need for maintenance.
The disadvantages are mainly that the units are expensive due to small production series and quite heavy in relation to other comparable energy systems.
The idea is to implement this technique in a number of situations (demonstration objects) where we believe that the concept (the Stirling) has certain advantages compared to other energy solutions. With this we mean that it can preferably be used in cold climate, in remote places for combined production of electricity and heat using local energy recourses.
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