A New Model of Large Heating Units Deeply Involved in the Peak Regulation of Power Network

Traditional heating mode of large heating units has a prodigious defect in the energy cascade utilization in cold region,and the Heating steam pressure is not reasonable. Leading to reduced unit load and Peaking capacity is not high. A new model is proposed on two heat exchangers were series operation and a small back-pressure turbine was placed before the heat exchanger of first large heating unit heater,so as to increase the generating capacity of heating unit and can reduce the first unit heating extraction steam pressure to a reasonable value. In addition,also can use the samll back pressure turbine driven electric compression type heat pump,so as to increase the external heating capacity and reduce the heating unit power output and improve the regulating ability of power network.