Directing against the problem of output capacity of the gas-steam combined cycle unit decreases as the ambient temperature rises

a new type inlet air cooling system of said unit has been designed by using the heat pipe type lithium bromide absorption chiller to recover the residual heat of flue gas dischargel from the waste heat boiler for refrigeration

so as to decrease lnlet air temperature for entering into the gas turbine.The analysis of influence of the flow rate and temperature variation for flue gas discharged from the waste heat boiler upon performance of the combined cycle unit shows that the inlet air cooling system equipped with bromide chiller can make the inler air temperature of the said gas turbine to decrease 10~15 ℃

the net annual electricity generation increases 20 000 MW·h.Under condition of constant ambient temperature

along with increasing of the discharged flue gas temperature

the temperature drop range of the inlet air entering into the gas turbine will also increase.