METHOD TO INCREASE ELECTRICAL EFFICIENCY OF MICROTURBINE UNIT Russian patent published in 2015 - IPC F01K21/04 

FIELD: electricity.

SUBSTANCE: method to increase the efficiency of electric energy production by a microturbine of a combined cycle plant involves the compression of air by a compressor and its supply to the burning zone of a combustion chamber. Simultaneously fuel is supplied to the combustion chamber, mixed with the compressed air and the produced fuel mixture is burnt. The obtained combustion products are mixed with water vapour in a mixing chamber to produce a gas-vapour mixture. The gas-vapour mixture is supplied to the turbine where its energy is converted into the mechanical energy of the turbine rotor rotation. The discharge gas-vapour mixture is supplied to a recuperator where its heat energy is transferred to the counter flow of water turning it into steam. The steam produced in the recuperator is supplied to the external walls of the combustion chamber providing for additional heating of the steam and cooling of the chamber walls. Afterwards the steam is fed into the mixing chamber providing for the return of much of the heat energy from the combustion chamber walls into the operation cycle.

EFFECT: increased efficiency and reduced thermal load on plant elements.

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