• HOME
  • POWER & ENERGY
  • CO-GENERATION

CO-GENERATION

CLEAN ENERGY SOLUTIONS

CO-GENERATION / COMBINED HEAT AND POWER (CHP)

Co-Generation or Combined Heat and Power (CHP) is the simultaneous production of electricity with the recovery and utilisation heat. Our advanced Natural Gas Co-Generation system is a thermodynamically efficient use of fuel and can decrease primary energy costs by up to 40% and CO2 emissions by up to 60% as compared to the separate purchase of electricity from the national electricity grid which includes for cooling and/or a gas boiler for onsite heating. The current national electricity grids are spread out over long distances causing transmission losses. In order to improve the overall performance of the electricity transmission and distribution network, CHP plants are typically installed close to the end user and therefore help reduce transportation and distribution losses.


For power users where security of supply is an important factor for their selection of power production equipment and gas is abundant, gas-based Co-Generation systems are ideally suited as captive power plants (i.e. power plants located at site of use). Furthermore, Natural Gas has one of the lowest CO2 emission values of fossil fuels and with its well-developed supply system (network grid), this natural resource has enormous potential to increase efficiency in the energy sector. A compact CHP design with integrated controls – and switchgear, thermal energy distribution system and advanced enclosure options.


Basically during the electricity generation, heat is released via the generator to the environment from 5 core sections:-


  1. Engine jacket cooling water
  2. Engine lubrication oil cooling
  3. First stage air intake intercooler
  4. Engine exhaust gases
  5. Engine generator radiated heat, second stage intercooler

The Co-Generation system captures the above waste heat and converts into various solutions for customers. In terms of the waste heat above, (i), (ii) and (iii) are recoverable in the form of hot water, typically on a 70/90˚C flow return basis and can be interfaced with the site for multiple usages. An example would be for the hospitality industry whereby hot water is needed for baths or even cooking.


The engine exhaust gases are generally used directly for drying, in a Heat Recovery boiler to generate steam, or via an exhaust gas heat exchanger combining with the heat from the cooling circuits. These gases typically leave the engine at between 400 and 500˚C. The heat from the second stage intercooler is also available for recovery as a lower grade heat.


Another solution would be to convert the waste heat into chilled water via an Absorption Chiller for cooling purposes which will be Combined Cooling and Power (CCP).