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论文类型：会议论文

发表时间：2011-01-01

收录刊物：CPCI-S

页面范围：396-399

关键字：absorption heat-transformer; falling film; spiral tube; ABSIM simulation

摘要：In this paper, a new AHT with falling film of aqueous LiBr solution inside vertical spiral tubes is installed in our laboratory. The variations of coefficient of performance (COP), thermal efficiency (Eth) and the heat transfer coefficient of the absorber at different falling film flow rate, hot water flow rate and operating temperature are investigated experimentally. The results demonstrated that the coefficient of performance and thermal efficiency of the system decrease with increase in the flow rate of LiBr solution, and the effect of flow rate of hot water on COP and Eth is very small. The available COP in our experiments is higher than 0.4. The heat and mass transfer coefficient of the absorber increase with increase of the flow rate of solution, up to 400W/(m(2) . K) and 0.013 kg/(m(2) . s) (temperature of waste heat is 90 degrees C); The heat transfer coefficient of absorber increases with increase of the temperature of waste heat, and decreases with increase of the cooling water temperature. Meanwhile, the computer code ABSIM (Absorption Simulation) is used to siniulate the AHT systems.