1. The simultaneous generation of electricity and useful heating and cooling from the combustion of a fuel or a solar heat collector.
2. Trigeneration or combined cooling, heat and power (CCHP), is the process by which some of the heat produced by a cogeneration plant is used to generate chilled water for air conditioning or refrigeration. An absorption chiller is linked to the combined heat and power (CHP) to provide this functionality.
- high efficiency production electricity and heat
- reduced fuel and energy costs
- lower electrical usage during peak summer demand
- engine heat can be used to produce steam of hot water for onsite use
- significant reductions in greenhouse gas emissions
- no harmful chemical pollutants since water is used as the refrigerant
- beneficial for improving building's energy efficiency ratings
https://en.wikipedia.org/wiki/Cogeneration (1.); https://www.clarke-energy.com/gas-engines/trigeneration/ (2.)