冷卻水循環(huán)系統(tǒng)主要以水作為冷卻介質(zhì)，并循環(huán)使用的一種冷卻水系統(tǒng)。主要由冷卻設(shè)備、水泵和管道組成。冷水流過需要降溫的生產(chǎn)設(shè)備（常稱換熱設(shè)備，如換熱器、冷凝器、反應(yīng)器）后，溫度上升，如果即行排放，冷水只用一次（稱直流冷卻水系統(tǒng)）。使升溫冷水流過冷卻設(shè)備則水溫回降，可用泵送回生產(chǎn)設(shè)備再次使用，冷水的用量大大降低，常可節(jié)約95%以上。冷卻水占工業(yè)用水量的70%左右，因此，循環(huán)冷卻水系統(tǒng)起了節(jié)約能耗作用。

    A cooling water system in which water is used as cooling medium and is recycled.It is mainly composed of cooling equipment, water pump and pipeline. After cold water flows through production equipment that requires cooling (often referred to as heat exchanger, condenser, reactor), the temperature rises and, if discharged immediay, cold water is used only once (called a direct current cooling water system).If the temperature and cold water flow through the cooling equipment, the water temperature will drop back and the production equipment can be pumped back to use again.The amount of cold water is greatly reduced，It often saves more than 95%.Cooling water accounts for about 70% of the industrial water consumption. Therefore, the recirculating cooling water system has the function of saving energy.