GAS TURBINE CO-GENERATION POWER PLANT Russian patent published in 2014 - IPC F02C6/18 F02C7/08 

FIELD: power engineering.

SUBSTANCE: gas turbine co-generation power plant comprises compressors of low and high pressure, a combustion chamber, a high pressure gas turbine and a low pressure gas turbine, having a gas connection between each other, a heating device and the main electric generator, connected to the high pressure gas turbine and used as a useful load. The outlet of the low pressure compressor is connected to the inlet of the high pressure compressor. The heating device is installed between gas turbines, is equipped with an internal hot channel, in which moving coolant is placed, representing combustion products partially spent in the gas turbine, and also a cold channel with another moving coolant placed inside it, which removes heat energy produced as a result of heat exchange between hot and cold channels inside the heating device for its use outside the gas turbine power plant. In the gas turbine co-generation power plant there is additionally a heat exchange device installed, comprising hot and cold channels interacting with each other by means of heat exchange. The inlet of the hot channel of the heat exchange device is connected to the outlet from the high pressure gas turbine, and the outlet of the hot channel of the heat exchange device is connected to the inlet of the hot channel of the heating device. The moving coolant of the hot channel of the heat exchange device is represented by partially spent combustion products arriving from the high pressure gas turbine. The inlet of the cold channel of the heat exchange device is connected to the outlet from the high compressor, and the outlet of the cold channel of the heat exchange device is connected to the inlet of the combustion chamber. The moving coolant of the cold channel of the heat exchange device is represented by a gaseous mixture containing oxidant arriving from the high pressure compressor. The heating device is arranged with controlled heat removal. An additional electric generator is connected to the low pressure gas turbine, used as a useful load.

EFFECT: invention is aimed at provision of control over co-generation mode, ie quantity of generated thermal and electric power, and at increase of efficiency ratio.

6 cl, 3 dwg