- CHP (also known as cogeneration) is the name applied to energy systems that produce both useful heat and electricity in a single process.
Electrical energy is also lost in the transmission and distribution of power to buildings and this energy can also be saved if the CHP generates electricity more locally. - Combined heat and power (CHP), also known as cogeneration as well as several other names, is the simultaneous production of heat and the generation of power
- Combined cooling heating and power (CCHP) or trigeneration, is the process in which cooling is also generated by waste heat in a CHP plant.