Cogeneration through combined heat and power (CHP) is the simultaneous production of electricity with the utilisation of heat. Cogeneration is a highly efficient form of energy conversion and it can achieve primary energy savings of approximately 40% by compared to the separate purchase of electricity from the national electricity grid and a gas boiler for onsite heating. Combined heat and power plants are typically for end users and industrial processes and therefore help reduce losses, improving the overall performance of the electricity and increase of efficiency (more than 90%) of the plant. For customers where security of supply is an important factor for their selection of power production equipment and gas is available, gas-based cogeneration systems are perfect systems.

System Efficiency
Gas engine combined heat and power systems are measured based upon the efficiency of conversion of the fuel gas to useful outputs.

Firstly the energy in the fuel gas input is converted into mechanical energy through combustion of the fuel gas in the engine. The mechanical energy is in turn used to turn the engine’s alternator in order to produce electricity. There is a small amount of loss in this process and in this example the electrical efficiency of the engine is <40%.

The thermal heat of the engine is produced through mechanical friction and the exhaust gas which produced a thermal efficiency of <45%.
Combination of electrical- and thermal energy sources of engines the efficiency can be more than 90 %.

The main task is to increase efficiency of power plants and provide tailor made solutions for all applications to customers in all industry segments.