Abstract

This article focuses on two major objectives. The first is the realization in the ANSYS Multiphysics 2017 software of numerical simulations of solar thermoelectric generators (STEG) equipped with vortex tube to supply the accessories of hybrid vehicles according to the solar flux, the vehicle speed and the adjustment of the fraction of cold air from the vortex tube. A comparative study between its simulation results and those of the thermal modeling of the same system recently carried out in literature will also be looked into. Our study is carried out taking into account a solar flux of 178.59 W/m², the STEG has 3042 thermoelectric couples. Thus, this article is structured in third main points. First a brief presentation of the STEG system, followed by the presentation of its 3-D computer model carried out in ANSYS software. Then a brief reminder of the numerical resolution method in ANSYS 2017 as well as the different boundary conditions to apply to the model is made. Finally, the article will present the results obtained (current and electrical power, temperature variations in the systems) all depending on the speed of the vehicle and the setting of the vortex tube. Also each of its results will be compared with those obtained by mathematical modeling. As results we had found that the maximum values are obtained for cold air fraction settings of 0.9. In addition, the simulation results obtained are fairly close to those obtained by the mathematical model. For example the temperature obtained on the hot side of STEG is 145 °C instead of 143.9 °C, the maximum electric current is 1.495 A instead of 1.499 A and the maximum electric power is 147 W instead of 147.9 W for speeds of 55.5 m/s.

摘要

本文重点介绍两个主要目标。第一个是在ANSYS Multiphysics 2017软件中实现了配备涡流管的太阳能热电发电机（STEG）的数值模拟，根据太阳通量、车速和冷空气比例的调整为混合动力汽车的配件供电来自涡流管。还将研究其模拟结果与最近在文献中进行的同一系统的热建模结果之间的比较研究。我们的研究是在考虑到 178.59 W/m ²的太阳通量的情况下进行的，STEG 有 3042 个热电偶。因此，本文的结构分为第三个要点。首先简要介绍 STEG 系统，然后介绍其在 ANSYS 软件中执行的 3-D 计算机模型。然后简要介绍 ANSYS 2017 中的数值解析方法以及应用于模型的不同边界条件。最后，本文将展示根据车辆速度和涡流管设置获得的结果（电流和电力、系统中的温度变化）。此外，它的每个结果都将与通过数学建模获得的结果进行比较。作为结果，我们发现最大值是在冷空气分数设置为 0.9 时获得的。此外，得到的模拟结果与数学模型得到的结果相当接近。例如，在 STEG 热侧获得的温度为 145 °C 而不是 143.9 °C，最大电流为 1.495 A 而不是 1.499 A，最大电功率为 147 W 而不是 147.9 W，速度为 55.5 m/ s。