Optimization of Cooling Channel Structure and Numerical Simulation of Heat Transfer with Flow for CPC Collector

doi:10.11930/j.issn.1004-9649.202210093

Abstract

Abstract: It is an effective way of comprehensive utilization of solar energy to realize the integrated application of photovoltaic and photothermal by using compound parabolic concentrator. Aiming at the core problem of surface cooling of photovoltaic components, this paper conducted theoretical simulation from the perspectives of cooling channel layout and inlet section optimization. Two different cooling channel modes of traditional straight pipe and new serpentine elbow were proposed. Combined with the control equation, the temperature field and velocity field in each channel were simulated by using Fluent software. The results showed that under the same boundary conditions, the comprehensive heat transfer performance of coiled tubes was better than that of traditional straight tubes. On this basis, three kinds of inlet section schemes with different shapes, namely, rectangular, semicircular and trapezoidal inner tubes, were proposed, and the heat transfer flow characteristics of channels with different inlet sections and the thermoelectric efficiency of the system were compared. The results showed that the comprehensive performance of rectangular section was better when the mass flow rate was small. While when the mass flow rate was large, the semicircular section was better.

Key words: solar energy, CPC collector, photovoltaic-photothermal integration, heat transfer enhancement, structural optimization, performance analysis

GENG Zhi, LU Xiangwu, WANG Jianli, SHI Tianqing, CHANG Xucheng, GU Yujiong. Optimization of Cooling Channel Structure and Numerical Simulation of Heat Transfer with Flow for CPC Collector[J]. Electric Power, 2023, 56(9): 206-214.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202210093

https://www.electricpower.com.cn/EN/Y2023/V56/I9/206

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