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基于特斯拉阀的太阳能光伏/光热系统数值研究

Numerical study on solar photovoltaic/thermal system with tesla valve.

作者信息

Du Shuai, Zou Jianxin, Zheng Xinli, Ye Xin, Yang Huazheng, Zhong Ping

机构信息

College of Science, Donghua University, Shanghai, 201620, China.

出版信息

Sci Rep. 2024 May 12;14(1):10836. doi: 10.1038/s41598-024-61785-x.

DOI:10.1038/s41598-024-61785-x
PMID:38735982
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11089045/
Abstract

In recent years, photovoltaic/thermal (PV/T) systems have played a crucial role in reducing energy consumption and environmental degradation, nonetheless, the low energy conversion efficiency presents a considerable obstacle for PV/T systems. Therefore, improving heat conversion efficiency is essential to enhance energy efficiency. In this paper, the PV/T system with the Tesla valve is proposed to solve this problem. Firstly, the cooling effect is simulated and analyzed in the system with four different flow channel structures: semicircle, rectangle, triangle and Tesla valve. The results indicate that the system with the Tesla valve exhibits superior cooling performance. Subsequently, several factors including angle, valve number, valve type, and pipe diameter ratio for the Tesla valve are further studied through numerical and simulation analysis. The results reveal that Tesla valves demonstrate optimal cooling performance when possessing the following structural parameters: complete symmetry, more valves, a 30-degree angle and a pipe diameter ratio of 1. Finally, four different types of fluid are selected to explore the Tesla valve. The conclusion shows that nanofluids with high density, low specific heat, and high thermal conductivity also improve the cooling performance. Thus, the PV/T system with the Tesla valve exhibits good heat dissipation and energy storage efficiency, electrical efficiency can reach 16.32% and thermal efficiency reach 59.65%.

摘要

近年来，光伏/热（PV/T）系统在降低能源消耗和环境恶化方面发挥了关键作用，尽管如此，低能量转换效率对PV/T系统来说是一个相当大的障碍。因此，提高热转换效率对于提高能源效率至关重要。本文提出了带有特斯拉阀的PV/T系统来解决这个问题。首先，在具有四种不同流道结构的系统中对冷却效果进行了模拟和分析：半圆形、矩形、三角形和特斯拉阀。结果表明，带有特斯拉阀的系统表现出卓越的冷却性能。随后，通过数值和模拟分析进一步研究了特斯拉阀的几个因素，包括角度、阀数量、阀类型和管径比。结果表明，当特斯拉阀具有以下结构参数时表现出最佳冷却性能：完全对称、更多阀门、30度角和1的管径比。最后，选择四种不同类型流体来探究特斯拉阀。结论表明，具有高密度、低比热容和高导热率的纳米流体也能提高冷却性能。因此，带有特斯拉阀的PV/T系统表现出良好的散热和储能效率，电效率可达16.32%，热效率可达59.65%。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e5/11089045/ad7e925a1ef6/41598_2024_61785_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e5/11089045/ba652441ce08/41598_2024_61785_Fig10_HTML.jpg

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