Heating load of a thermal power plant is used for industrial extraction steam heating and civil heat supply.During the non-heating season

the heating load of thermal power plant reduces

resulting in an increase in unit coal consumption and waste of civil heating network.Therefore

the original heat and power cogeneration unit was transformed into combined cooling heating and power(CCHP)unit.Calculation after the retrofitting shows that:energy-saving benefit of the CCHP unit was obvious when the electric refrigerator refrigeration coefficient was less than 3.5;while thermal economy of the CCHP unit under low thermal electricity ratio decreased when the electric refrigerator refrigeration coefficient was larger than 4.So

ways of improving the thermal coefficient of lithium bromide-water refrigerator

reducing industrial extraction steam load and increasing cooling load were suggested to be adopted to improve the economic benefits of the CCHP system.