Parametric evaluation of solar integrated combined partial cooling supercritical CO2 cycle and Organic Rankine Cycle using low global warming potential fluids

IF 1.1 Q3 Engineering

Journal of Thermal Engineering Pub Date : 2023-10-17 DOI:10.18186/thermal.1370699

Yunis KHAN, Radhey Shyam MISHRA, Roshan RAMAN, Abdul Wahab HASHMI

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Abstract

In this study, the performance of the organic Rankine cycle combined with the partial cooling supercritical CO2 cycle as the bottoming cycle for recovering the low grade heat powered by a solar power tower was evaluated. Ecofriendly fluids were taken into consideration. To simulate the model under consideration, a computer programme was created in engineering equation solver software. The impacts of solar radiation, concentration ratio, solar incidence angle, CO2 turbine inlet temperature, heat exchanger effectiveness and main compressor inlet tempera-ture were investigated. Based on working fluid R1224yd(Z), it was determined that the com-bined cycle’s thermal efficiency, exergy efficiency, and power output improved from 35.16% to 55.43%, 37.73% to 59.42%, and 188 kW to 298.5 kW, respectively, as solar irradiation raised from 0.4 kW/m2 to 0.95 kW/m2. Lower the solar incidence angle and higher the concentration ratio can enhance the combined system’s performance. Amongst the working fluids that were taken into account, R1224yd(Z) was suggested as having superior performance.

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利用低全球变暖势流体的太阳能集成部分冷却超临界CO2循环和有机朗肯循环的参数评价

本研究对有机朗肯循环结合部分冷却超临界CO2循环作为底循环回收太阳能发电塔低品位热能的性能进行了评价。环保液体被考虑在内。为了模拟所考虑的模型，在工程方程求解软件中编写了计算机程序。研究了太阳辐射、浓度比、太阳入射角、CO2涡轮进口温度、换热器效率和主压气机进口温度的影响。基于工作流体R1224yd(Z)，确定当太阳辐照量从0.4 kW/m2提高到0.95 kW/m2时，联合循环的热效率、火用效率和输出功率分别从35.16%提高到55.43%、37.73%提高到59.42%、188 kW提高到298.5 kW。降低太阳入射角和提高聚光比可以提高组合系统的性能。在考虑的工质中，R1224yd(Z)被认为具有较好的性能。

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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来源期刊

Journal of Thermal Engineering THERMODYNAMICS-

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

4 weeks

期刊介绍： Journal of Thermal Enginering is aimed at giving a recognized platform to students, researchers, research scholars, teachers, authors and other professionals in the field of research in Thermal Engineering subjects, to publish their original and current research work to a wide, international audience. In order to achieve this goal, we will have applied for SCI-Expanded Index in 2021 after having an Impact Factor in 2020. The aim of the journal, published on behalf of Yildiz Technical University in Istanbul-Turkey, is to not only include actual, original and applied studies prepared on the sciences of heat transfer and thermodynamics, and contribute to the literature of engineering sciences on the national and international areas but also help the development of Mechanical Engineering. Engineers and academicians from disciplines of Power Plant Engineering, Energy Engineering, Building Services Engineering, HVAC Engineering, Solar Engineering, Wind Engineering, Nanoengineering, surface engineering, thin film technologies, and Computer Aided Engineering will be expected to benefit from this journal’s outputs.