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Glossary of Terms
Plate heat-exchanger
In plate-type heat exchangers, the heat is fed into or removed from the water through heat exchange. They consist of wave-shaped molded plates that are put together so that first the water that is to be heated and cooled off flows in each of the series of intermediate spaces.
Primary energy
Primary energies are the naturally-occurring energy sources such as coal, oil, natural gas, solar energy or natural uranium.