The Liverpool University CHP plant

A gas turbine CHP. scheme which operates at Liverpool University, UK, consists of a Centrax 4 MW (nominal) gas turbine with an overall efficiency of about 0.27, exhausting to a WHB. The plant meets a major part of the University s heat load of about 7 MW on a mild winter s day. Supplementary firing of the WHB (to about 15 MW) is possible on a cold day. Provision is al.so made for by-passing the WHB when the heat load is light, in spring and autumn,. so that the plant can operate very flexibly, in three modes viz., power only, recuperative and supplementary firing. 

The major performance parameters at design operating conditions are as follows  

Electrical power output Heat output (normal load) (with supplementary firing) Gas fuel energy supply Thermal efficiency 

Chapter 9. The gas turbine as a cogeneration (combined heat and power) plant 

A full description of the economics of operating this plant over a complete year is given by Horlock [1]. 

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