Combined Heat and Power (CHP) is an efficient way to generate
electricity and heat by utilizing the waste heat from the electric generator
in place of heat from a separate boiler. Currently, most electricity is
purchased from a central utility company that generates power at 35%
efficiency; the balance of fuel input energy is lost as heat. With CHP some
of the electricity is generated onsite and the waste heat from the generator
(water jacket and exhaust) is used for space and water heating and other
industrial processes that require heat. This reduces the fuel requirements
to the boiler which also reduces emissions of Green House Gases (GHG) and
other pollutants. Overall CHP efficiencies can make upwards to 85%. CHP is
also known as Buildings Cooling, Heating & Power (BCHP), CHP for
buildings (CHPB), Integrated Energy Systems (IES), Total Energy System
(TES), Tri-generation (Trigen) and Cogeneration. CHP is best fit where there
is demand for heat (or cooling load) and electricity is simultaneous e.g.
hospitals, the hotel industry, educational institutes. Exhaust heat can be
applied to support cooling loads with absorption chillers.