Analysis of recoverable waste heat of circulating cooling water in hot-stamping power system

Abstract

This article studies the possibility of using heat pump instead of cooling tower to decrease temperature and recover waste heat of circulating cooling water of power system. Making use of heat transfer theory the article carried on analysis and calculation about recoverable waste heat of circulating cooling water in hot-stamping power system which includes hot-stamping, closing-in and extrusion intermediate frequency induction furnace. The results show that the whole process can recover a calorie which is 2.642 × 106 kJ per hour. Using the recycled calories can make 15.82 tons hot water per hour which is 60 °C. So it can reduce burning capacity of coal 180.29 kg/h. The hot water can provide the needed water for production and workers bathing. This research shows that using heat pump to recover the waste heat of circulating cooling water is effectual. Realizing the use of waste heat, it can reduce pollution of condensing heat, reduce operating cost and noise of cooling tower, reduce site and the occupation of equipment, improve the production efficiency, and can also save the natural resources (fossil fuel-coal) and reduce the cost of needed hot water production.