Optimization of Subway Indirect Evaporative Cooler Water Distribution Methods
Liu Shan,He Yecong,Fu Junping,Cao Jinzhou and Shi Pei
DOI:10.11835/j.issn.1674-4764.2014.05.002
Received January 14, 2014,Revised , Accepted , Available online July 01, 2015
Volume ,2014,Pages 11-15
- Abstract
In conventional indirect evaporative cooler, the lack of uniformity and integrity of water film surface results in low thermal efficiency. To solve the problem,an indirect evaporative cooler with rotating water on both sides is put forward. The experiment was carried out to explore the heat transfer performance of heat exchanger under three types of arrangement and the factors influence the performance were studied by orthogonal experiment. The study results show that when the hole is on the direction of air flow, the thermal performance of heat exchanger is optimal and the recommended rate of rotating water distribution installation 76 r/min. Heat exchange increases with the increase of water spray quantity, air velocity, cooling water flow rate, cooling water inlet temperature and decrease with increase of water temperature, air temperature cooling water inlet temperature has the most significant effect on the performance of heat transfer. And when the temperature increases form 35 ℃ to 39 ℃, the heat transfer improved 37.62%, Heat transfer in per unit area is about 1.14 kW. The heat exchanger can be installed in exhaust tunnel of underground stations, which can effectively solve the subway station cooling tower installation location problem.