Computer Simulation of an Ammonia-Water Absorption Cycle for Refrigeration: Using a Distillation Tower to Replace the Generator
Computer Simulation of an Ammonia-Water Absorption Cycle for Refrigeration: Using a Distillation Tower to Replace the Generator作者机构：Department of Chemical Engineering Tunghai University Taiwan Department of Chemical Engineering California State University Long Beach CA USA
出 版 物：《Energy and Power Engineering》 (能源与动力工程（英文）)
年 卷 期：2020年第12卷第6期
页 面：237-256页
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
主 题：Simulation Ammonia-Water Absorption Refrigeration
摘 要：By using a distillation tower as the regenerator, the coefficient of performance (COP) of the ammonia-water absorption refrigeration cycle is calculated in this work. Two types of distillation towers, namely an equilibrium-stage tower with a total condenser and a packed-bed tower with a partial condenser, are used in the cycle. From the simulation results, it is found that both types of distillation towers can successfully increase the COP of the cycle due to increased ammonia concentration in the vapor phase of the ammonia-water refrigerant. It was also found that the tower equipped with a partial condenser provides higher COP than that of the tower equipped with a total condenser. The value of COP can be further increased when the generator is replaced by the packed-bed tower in this water-ammonia absorption cycle. The effects of the mass flow rate ratio of NH3/H2O, stage number, reflux ratio and energy duty of the tower on the COP of the cycle are also studied in the present paper.
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