An effective and simplified method to select the working fluid for waste heat recovery based Organic Rankine Cycle

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY

TECCIENCIA Pub Date : 2022-08-08 DOI:10.18180/tecciencia.2022.33.3

Asad A. Naqvi, Ahsan Ahmed, T. Nadeem, M. Talha, Muhammad Hamza Tariq, M. Siddiqui, Rayyan Ahmed Abbasi

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引用次数: 1

Abstract

Organic Rankine Cycle (ORC) is an attractive option to utilize the low-grade waste heat for power generation. The selection of working fluid for ORC is a challenging task because of environmental constraints as most of the organic fluids has the capacity to damage the environment. In this research, a method for the selection of an optimum working fluid for the operation low grade waste heat is determined. The selection of the optimum working fluids depends upon the thermal efficiency, Global Warming Potential (GWP), Ozone Depletion Potential (ODP) and Atmospheric Lifetime of the fluid. Twelve different organic fluids including R134a, butene, R22, R152a, R245fa, R290, R161a, isobutene, isobutane, dimethyl ether, R600 and R124 are selected for the study. The ORC is analyzed by using EES at 2 MPa, 2.5 MPa and 3 MPa. The thermal efficiency of ORC is determined and is found that high operating pressure is favorable for the operation of ORC. At 2.5 MPa, the top three working fluids are R-245fa, R-600 and Iso-butene with an efficiency of 12.7%, 12% and 11.3% respectively. On the basis of thermal efficiency, R-245fa is the best but it has the highest GWP and atmospheric life of 1050 and 7.7 years. R-600 has GWP and atmospheric life of just 20 and 0.018 years. On the basis of environmental constraints, R-600 is found to be more beneficial than R-245fa. It is concluded that R-600 is the optimum working fluid for the operation of low-grade waste heat ORC.

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基于废热回收的有机朗肯循环工质选择的一种有效简化方法

有机朗肯循环（ORC）是一种利用低品位废热发电的有吸引力的选择。由于环境限制，ORC工作流体的选择是一项具有挑战性的任务，因为大多数有机流体都有破坏环境的能力。在本研究中，确定了一种为低品位余热运行选择最佳工作流体的方法。最佳工作流体的选择取决于流体的热效率、全球变暖潜能值、臭氧消耗潜能值和大气寿命。选择12种不同的有机流体进行研究，包括R134a、丁烯、R22、R152a、R245fa、R290、R161a、异丁烯、异丁烷、二甲醚、R600和R124。通过在2MPa、2.5MPa和3MPa下使用EES对ORC进行分析。确定了ORC的热效率，发现高工作压力有利于ORC的运行。在2.5MPa下，前三种工作流体分别为R-245fa、R-600和异丁烯，效率分别为12.7%、12%和11.3%。就热效率而言，R-245fa是最好的，但其全球升温潜能值最高，大气寿命分别为1050年和7.7年。R-600的全球升温潜能值和大气寿命分别只有20年和0.018年。在环境限制的基础上，发现R-600比R-245fa更有益。结果表明，R-600是低品位余热ORC运行的最佳工质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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TECCIENCIA ENGINEERING, MULTIDISCIPLINARY-

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