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首页> 外文期刊>Energy Conversion & Management >Semi-3D transient simulation of a nanofluid-base photovoltaic thermal system integrated with a thermoelectric generator
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Semi-3D transient simulation of a nanofluid-base photovoltaic thermal system integrated with a thermoelectric generator

机译：热电发电机集成的纳米流体基光热系统的半三维瞬态模拟

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摘要

Thermoelectric generators (TEGs) can produce electricity from the temperature gradients. A combination of TEG with photovoltaic thermal (PVT) systems can be a possible solution for the improvement of their electrical performance. To evaluate the feasibility of using TEG in PVT systems, a comparison between only the PVT system and PVT system integrated with TEG (PVT-TEG) is conducted using numerical simulation. A semitransient numerical code is developed by FORTRAN software to simulate both PVT and PVT-TEG systems. The governing equations are solved by Tridiagonal Matrix Algorithm (TDMA) using an implicit formulation discretizing by a center-differencing scheme. In this study, aluminum-oxide/water (Al2O3/water) nanofluid is selected as working fluid due to the performance improvement of the systems. Both energy and exergy analysis are conducted to estimate the performance of the nanofluid based PVT-TEG system. The results indicate that the PV unit in both PVT and PVT-TEG systems can generate nearly the same electrical power. However, the PVT-TEG system has 2.5%-4% higher overall electrical energy efficiency compared to only the PVT system. It has been found, in all considered parameters, the PVT-TEG system compared to the PVT system in terms of overall exergy efficiency shows a better performance, while in terms of overall energy efficiency shows poor performance. Furthermore, according to the parametric analysis, there is a direct relation between inlet temperature and photovoltaic (PV) plate temperature, whereas there is an indirect correlation between the inlet temperature and TEG sides difference temperatures.
机译：热电发电机（TEGS）可以从温度梯度产生电力。 TEG与光伏热（PVT）系统的组合可以是改善其电性能的可能解决方案。为了评估使用TEG在PVT系统中使用TEG的可行性，仅使用数值模拟进行与TEG（PVT-TEG）集成的PVT系统和PVT系统之间的比较。由Fortran软件开发了半定数数字代码，以模拟PVT和PVT-TEG系统。使用中心差分方案离散化的隐式配方来通过Tridiagonal矩阵算法（TDMA）来解决管理方程。在该研究中，由于系统的性能改善，选择氧化铝/水（Al 2 O 3 /水）纳米流体作为工作流体。进行能量和漏洞分析，以估算基于纳米流体的PVT-TEG系统的性能。结果表明，PVT和PVT-TEG系统中的PV单元可以产生几乎相同的电力。然而，与PVT系统相比，PVT-TEG系统的总电能效率高2.5％-4％。已经发现，在所有考虑的参数中，PVT-TEG系统与PVT系统相比，在整体高级效率方面表现出更好的性能，而在整体能效显示出差不佳。此外，根据参数分析，入口温度和光伏（PV）板温度之间存在直接关系，而入口温度与TEG侧面差温度之间存在间接相关性。

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