Cogeneration Combined Heat and Power Generation

More complex utility options are encountered when combined heat and power generation (or cogeneration) is exploited. Here the heat rejected by a heat engine such as a steam turbine, gas turbine or diesel engine is used as hot utility. 

Now consider the two most commonly used heat engines (steam and gas turbines) in more detail to see whether 

The process requires (Qhp + Qlp) to satisfy its enthalpy imbalance above the pinch. If there were no losses from 

Example 16.5 The stream data for a heat recovery problem are given in Table 16.7 below. 

A problem table analysis for ATmin = 20°C results in the heat 

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Combined heat and power cogeneration). Combined heat and power generation can have a very significant effect on the generation of utility waste. However, great care must be taken to assess the effects on the correct basis. 

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