Co-generation (also combined heat and power, CHP) is the use of a heat engine or a power station to make both electricity and useful heat at the same time.

Conventional power plants emit the heat created as a byproduct of electricity generation into the environment through cooling towers, as flue gas, or by other means. Combined heat and power captures the byproduct heat for domestic or industrial heating purposes, either very close to the plant, or for distribution through pipes to heat local housing.

Byproduct heat at moderate temperatures (100 to 180°C) can also be used in absorption chillers for cooling. In this case, such plant producing electricity, heat and cold is called tri-generation plant.

CBIS INTERNATIONAL GROUP is able to construct the co-generation and tri-generation systems as turn-key. CBIS INTERNATIONAL GROUP is invited to participate into the tenders for constructing the tri-generation systems of six city hospitals in Turkey.