What is referred to as “CHP” is often still unclear. For most people this abbreviation for a combined heat and power plant is a collective term known by the media. In the technical sense, this means a system that provides energy in the form of heat and electricity. This is also meant by the so-called “cogeneration”, which is also often mentioned in the media. The coupled generation of power and heat significantly increases the efficiency compared to conventional energy conversion processes, e.g. in gas power plant, the waste heat generated in the process is dissipated into the environment and the potential for generating power or electricity remains unused in a pure heating plant.
Expressed in a simple way, a cogeneration unit is a unit of e.g. powered by (bio) fuel engine, which drives a power generator and its waste heat is used.
Basically, one could imagine an ordinary car, whose drive does not come from the tires but a by a power generator rotating, the hot cooling water is cooled at the hot water tank in the basement and heat its exhaust gases like a boiler in a heat exchanger heating water.
However, it could, for example, a gas turbine used as a combined heat and power plant, it is just a collective term for the generation of electricity and heat from one technical unit.
The GreenEnergyFirst project uses an aggregate by the manufacturer and project partner Viessmann, which includes a 4-cylinder gasoline engine and provides 50 kW of electrical and 81 kW of thermal power. The CHP plant is heat-managed, as its thermal output supports the district heating supply of the quarter The resulting electrical energy can be used directly in the neighborhood by the residential units. If there is no use for it, the generated electricity is fed into the public grid. The generation-related use of electricity and heat serves the purpose of keeping transmission losses as low as possible.