Application analysis of large temperature difference of chilled water in air conditioning systems

 By analysing the characteristics of water chillers, air conditioning terminal surface coolers and chilled water pumps under different inlet and outlet water temperatures and temperature differences, combined with a case, calculates the total input power of air conditioning system when the terminal surface coolers are air conditioning units or fan-coil units, the outlet water temperatures of water chillers are 5 ℃, 6 ℃ and 7 ℃, and the temperature-differences are 5 ℃, 6 ℃, 7 ℃ and 8 ℃. Suggests that the refrigeration system should be optimized according to the project scale, investment, transmission radius of air conditioning water system, building height, cold source form, etc., and the appropriate temperature and temperature difference of chilled water supply and return water should be selected after technical and economic comparison.