Combined Heat and Power Focus

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Prime Movers and Electrical Generators: A Summary

The following table compares the two main types of CHP package and provides details of typical capacities and dimensions.

 

CHP Packages: outline data
  Gas-engine CHP
 Small-scale gas turbine CHP
Electrical output
60kW100kW 300kW
600kW
1,000kW
60kW
100kW
Heat output
 115kW130kW
430kW
880kW
1,300kW
100kW
150kW
Fuel consumption
 215kW310kW
990kW
1,950kW
3,000kW
280kW
350kW
Electrical efficiency27.9%
32.3%
30.3%
30.8%
33.3%

21.4%¹

28.6%
Heat efficiency
53.5%

41.9%

43.4%
45.1%
43.3%
35.7%
42.9%
Overall efficiency
81.4%
74.2%
73.7%
75.9%
76.6%
57.1%
71.5%
Package length (metres)
2.92.9
4.0
6.5
8.0
2.0
2.9
Package width (metres)
0.8
1.3
2.0
3.5
4.0
0.9
0.9
Package height (metres)
1.8
1.95
2.4
2.6
3.5
1.6
1.9
Package weight (tonnes)
2.5
4.0
8.0
12.0
16.0
1.0
2.0
¹Small-scale gas turbines with recuperators have higher electrical efficiencies - typically 26-28%.

 

The table below summarises prime mover/electrical generator characteristics.

 

Summary of prime mover/electrical generator characteristics
Type of plant
Typical output range Typical fuels
Typical heat to power ratioGrade of heat output
 Gas engine50-1,000kW 

Natural gas, Landfill gas, Biomass or Mine gas 

 1.5:1

 Low or Low/High 

 Small-scale gas turbine
 30-1,000kW

Natural gas, Landfill gas, Biogas or Mine Gas 

 1.5:1 (up to 3:1 for some units)

 Low or High


Other Topics

 

Previous: Heat Recovery
 

What's New

UK CHP Development Map

UK CHP Development Map

UK CHP Development Map

UK CHP Development Map Screenshot

The UK CHP Development Tool is the latest version of the map, originally developed as a tool aimed at assisting power station developers consider the opportunities for supplying heat and development of combined heat and power (CHP) as required under planning policy. However, it can also be used by both small and large organisations to help identify the locations where the supply of CHP heat would have the greatest potential, and therefore the largest positive environmental impact.

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