METHOD OF COMBINED HEAT AND POWER PLANT OPERATION Russian patent published in 2009 - IPC F01K23/06 

FIELD: power production.

SUBSTANCE: method of combined heat and power plant operation is proposed by the invention. The considered combined heat and power plant is overbuilt with steam and gas unit with double-circuit steam recovery heat generator. Part of steam generated in steam boiler is replaced with steam generated in the first circuit of the double circuit steam recovery heat generator. Low-pressure steam from the double circuit steam recovery heat generator is supplied to the heat recovery elements of the combined heat and power plant steam turbine with lesser fuel consumption per the produced power unit. The steam remaining from high-pressure regenerative recoveries and heat recoveries is subject to expansion in steam turbine producing additional action.

EFFECT: reduction of specific fuel consumption for electrical and heat power, increase of cycle economy, use of power reserves available in heat steam turbines and increase of their operating power; power generation at combined heat and power plants at lesser additional capital costs.

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