Range of operation for a gas turbine CHP plant

We now illustrate numerically the full range of operation of a gas turbine CHP plant, 

A gas turbine plant with an overall efficiency t]cq = 0.25 matching a heat load Acc, = 2.25 is again considered as the basic CHP plant also implied is a non-useful heat rejection ratio (Cnu)cg( cg = [1 ( cg)( g + 1)1 =. 3/16. For FESR calculations, we again take the conventional plant efficiency as 0.4 and the conventional boiler efficiency as 0.9. At the fully matched condition the.se assumptions previously led to EUF = 0.8125 and FESR = 0.2. 

We next calculate EUF and FESR over a range of heat to power ratios Ap = A g. 

For the plant with a WHR only, for Ap A g. the power is taken via the grid from a conventional power plant. Thus Eqs. (9.17) and (9.18) yield 

EUF and FESR are plotted against A on the left hand side of Fig. 9.5. (Gnu)cg( cg is constant at 3/16 over the range from A = 0 to 2.25, since the operation of the CG plant remains the same. 

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