Performance Analysis of Photovoltaic Passive Heat Storage System with Microencapsulated Paraffin Wax for Thermoelectric Generation

M. Nazer, M. Rostam, S. Y. E. Noum, M. T. Hajibeigy, K. Shameli
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引用次数: 1

Abstract

The depletion of non-renewable energy sources and negative effects towards the environment push research towards the widespread adoption of renewable energy sources such as solar energy. The main drawback of solar panels is that temperatures above 27°C will result in an efficiency drop of 0.1-0.5%/°C. In previous studies, usage of photovoltaic thermal (PVT) systems was mainly for the purpose of heating water, warming buildings, and drying crops. This research will focus on the usage of a standalone PVT and thermoelectric generator (TEG) system whereby it uses heat extracted from the PVT system for thermoelectric generation. A passive standalone PVT-TEG system design with microencapsulated paraffin wax as a phase change material (PCM) as a heat storage medium was created. The heat stored in the PCM is used as a heat source for thermoelectric generation. To extract the heat from the PV panel, an aluminum heatsink underneath the PV panel is used as a heat absorber to passively extract heat without external power sources. This setup reduces the surface temperature by 22.7°C. Transient thermal analysis and thermoelectric simulation of the system was conducted through Computational Fluid Dynamics (CFD) using ANSYS 2019 software. The error recorded between the experimental and simulation results was 4.2%. This proposed system panel successfully increased the electrical efficiency of the PV panel by approximately 12.8%, where the overall electrical power produced shows a significant increase from 7.7W to 17.7W.
微胶囊化石蜡光伏被动蓄热系统热电性能分析
不可再生能源的枯竭和对环境的负面影响促使研究朝着广泛采用太阳能等可再生能源的方向发展。太阳能电池板的主要缺点是温度高于27°C将导致效率下降0.1-0.5%/°C。在以往的研究中,光伏热(PVT)系统的使用主要用于加热水、加热建筑物和干燥作物。这项研究将集中在一个独立的PVT和热电发电机(TEG)系统的使用上,该系统利用从PVT系统中提取的热量进行热电发电。采用微胶囊化石蜡作为相变材料(PCM)作为储热介质,设计了一种被动式独立PVT-TEG系统。储存在PCM中的热量被用作热电发电的热源。为了从光伏板中提取热量,光伏板下方的铝制散热器被用作吸热器,在没有外部电源的情况下被动地提取热量。这种设置使表面温度降低了22.7°C。利用ANSYS 2019计算流体动力学(CFD)软件对系统进行了瞬态热分析和热电模拟。实验结果与仿真结果的误差为4.2%。该系统面板成功地将PV面板的电效率提高了约12.8%,其中产生的总功率从7.7W显着增加到17.7W。
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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