Indexed by:Journal Papers
Date of Publication:2020-07-25
Journal:APPLIED THERMAL ENGINEERING
Included Journals:SCIE
Volume:176
Issue:,SI
ISSN No.:1359-4311
Key Words:Recirculating cooling water system; Counter flow cooling tower; Heat dissipation model; Heat dissipation efficiency; Optimum determination method; Water flow rate
Abstract:The variation of water and air flow are effective measures for reducing the energy consumption of recirculating cooling water systems. In this paper, a simplified heat dissipation model of a cooling tower was developed. Combining the heat dissipation model with the power models of the power devices, a determination method was proposed to judge the optimality of the current operation state according to the heat dissipation efficiency of the cooling tower. In order to prove the validity of the optimum determination method, an experimental setup of a recirculating cooling system was established, and tests were performed under different conditions. The experimental results show that the heat dissipation calculated by the simplified model is consistent with that obtained from the experimental data, and that the empirical flow rate of water at the optimal point is in accordance with the flow rate of water the optimal point obtained by the optimum determination method. It was revealed that even with a variation of operation parameters of as low as 5.56%, the determination method can effectively identify the state of optimization. The method was able to give an insight into the trend of regulation of the water flow in recirculating cooling water system.
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