Performance Assessment of Direct Vapor Generation Solar Organic Rankine Cycle System Coupled with Heat Storage

Jahan Zeb Alvi, Yu Jinghu (), Yongqiang Feng (), Muhammad Asim, Wang Qian and Gang Pei
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Jahan Zeb Alvi: School of Mechanical Engineering, Jiangnan University, Wuxi 214024, China
Yu Jinghu: School of Mechanical Engineering, Jiangnan University, Wuxi 214024, China
Yongqiang Feng: School of Energy and Power Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
Muhammad Asim: School of Professional Education & Executive Development, The Hong Kong Polytechnic University, Kowloon, Hong Kong
Wang Qian: School of Energy and Power Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
Gang Pei: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China

Sustainability, 2022, vol. 14, issue 22, 1-18

Abstract: Phase change materials employed as thermal energy storage can aid in maximizing the use of stored solar energy. The current research examined the impact of three kinds of phase change materials (PCMs) on the dynamic performance of a solar organic Rankine cycle (ORC) system based on a direct vapor production. A number of evacuated flat plate collectors, a condenser, an expander, and an organic fluid pump make up this system. The thermodynamic cycle model of the direct vapor generation (DVG) solar ORC system was combined with the finite difference model of a phase change material heat storage tank created in MATLAB. The effect of PCMs (Organic, Inorganic and Eutectic PCMs) on the collector, ORC, and system efficiency, net power output, PCM temperature, and heat stored was studied weekly, monthly, and annually. Among the selected PCMs, Mg(NO3) 2 .6H 2 O had the highest system efficiency at 9.34%; KNO 3 -NaNO 2 had the highest net power output at 33.80 kW; and MgCl 2 .6H 2 O stored the maximum energy of 20.18 MJ annually. Under the given operational and boundary conditions, the spring and fall were preferable to the summer and winter months for storing heat from phase change materials.

Keywords: phase change material; organic Rankine cycle; heat stored; direct vapor generation; net power; output efficiency (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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