CHP can make significant fuel and emissions savings over conventional, separate forms of power generation and heat-only boliers. The generation of electricity from power stations is generally at efficiencies in the range 30-5 %, based on the Net Calorific Value (NCV) or Lower Heating Value (LHV) of the fuel. Further losses occur in the transmission and distribution of electricity to costumers. This means that 45-70 % of the energy content of the fuel is not usefully employed. This unutilised energy content is rejected as heat directly to the atmosphere or into seas or rivers. The generation of electricity and the recovery of heat in CHP plants typically ach
DS/CWA 45547:2004 history
2004DS/CWA 45547:2004 Manual for determination of combined heat and power (CHP)