Analysis and conceiving of year-round air conditioning with a closed cooling water system

Presents a cold and heat source scheme for the central air conditioning system that can use water-cooled chillers for cooling in summer and heating in winter. It has advantages of high performance coefficient of water-cooled chillers in summer and working as heat pump in winter. Primary analyses indicate that its annual energy consumption is less than that of the air-source heat pump units in Middle and South China.