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Steady state numerical simulation and studying performance of a modified diffusion absorption refrigeration cycle
Alexandria Engineering Journal ( IF 6.8 ) Pub Date : 2021-07-30 , DOI: 10.1016/j.aej.2021.07.027
Mohamed Elsayed 1 , Abdelhamid Attia 1 , Sameh Tawfeek 2
Affiliation  

In this paper, numerical simulations of Diffusion Absorption Refrigeration – DAR cycle were conducted in order to study the performance of two configurations in steady state mode and use ammonia, water, hydrogen as working fluids. The two configurations were numerically simulated using models developed with the commercial flow sheet Aspen HYSYS V10 software. The first configuration where the main simple DAR cycle components were simulated and validated the experimental results. The second configuration where the modified DAR cycle was simulated which has an auxiliary heat exchanger added to the main simple DAR cycle as a modification. It was found that for the same input assumptions and heat applied, the modified DAR cycle shows higher cooling load. Therefore, higher COP than the simple DAR cycle. The optimal operation of the modified cycle is 36 W applied to the generator to achieve a COP of 0.235 instead of 0.209 for simple DAR cycle. The Simulation results show that by using the modified cycle, the COP improves by 12.4%.



中文翻译:

改进型扩散吸收制冷循环的稳态数值模拟及性能研究

在本文中,为了研究两种配置在稳态模式下的性能,并使用氨、水、氢作为工作流体,进行了扩散吸收制冷 - DAR 循环的数值模拟。使用商业流程表 Aspen HYSYS V10 软件开发的模型对这两种配置进行了数值模拟。第一种配置,其中主要的简单 DAR 循环组件被模拟并验证了实验结果。第二种配置,其中模拟了修改后的 DAR 循环,其中将辅助热交换器添加到主要的简单 DAR 循环中作为修改。发现对于相同的输入假设和施加的热量,修改后的 DAR 循环显示出更高的冷却负载。因此,COP 比简单的 DAR 循环更高。修改后循环的最佳运行是将 36 W 应用于发电机以实现 0.235 的 COP,而不是简单 DAR 循环的 0.209。仿真结果表明,通过使用改进的循环,COP 提高了 12.4%。

更新日期:2021-07-30
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