Abstract
An alternative to coal technology in regions with a significant share of gas in the fuel balance can be the transition to dual-fuel combined cycle gas turbine plants. The article considers five technological profiles of cogeneration combined cycle gas turbine power unit: with a low-pressure steam generator; with coal gasification; with gas line heater; with gas line heater and freon thermotransformer; dump type with a binary coefficient equal to one. A comprehensive analysis of cogeneration plants was carried out. The perfection of the thermal design of a combined cycle gas turbine power unit of each type is evaluated by the exergy structural coefficient. An analysis the criterion of technical and economic efficiency, exergy efficiency for the supply of electricity and thermal power for combined cycle power plants in comparison with traditional cogeneration power units in the power range of 50 … 250 MW are also given.
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