Application of large temperature difference technique of air conditioning chilled water to engineering

Taking an example of the energy efficiency reformation of a hotel air conditioning system, analyses qualitatively the effect of the large temperature difference system on the energy consumption of chilled water pumps, and the heat exchange performance of water chillers and terminal devices. Finds that the COP of the unit will decrease as water flow rate and the heat exchange coefficient at water side of evaporators decrease after adopting the system though chilled water quantity delivered, the energy consumption of pumps and the initial investment of water system are decreased. Considers that to increase the row number of surface air coolers and the heat-transfer area and to change the tube pass number of surface air coolers can ensure the operation performance of the large temperature difference units in order to obtain best energy saving effect in hotel reformation.