Abstract
Cogeneration Cogeneration, also known as combined heat and power (CHP), describes the simultaneous production of both mechanical energy and useful heat from various sources of energy by a thermodynamic process in a technical plant [1, 2]. Combined heat and power plant (CHP Plant) A combined heat and power plant (CHP plant) or cogeneration plant provides simultaneously electricity and useful heat. Electricity generation efficiency Electricity generation efficiency or electrical efficiency is the ratio between the electricity output and the energy input of an energy conversion system.Whereas small-scale CHP plants with combustion engines feature electricity generation efficiencies of roughly 30%, large-scale CHP plants obtain up to 45% [3, 4]. Energy conversion efficiency Energy conversion efficiency or overall conversion efficiency is the ratio between the useful energy output and the energy input of an energy conversion system. For CHP plants, energy conversion efficiency is the sum of electricity conversion efficiency and heat conversion efficiency. Electrical and thermal auxiliary
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