Abstract Solar Parabolic Trough Collectors (PTC) are alternative clean solution for the thermal power plants to generate electricity and thermal energy. It can be configured to support small, medium and high temperature applications. In PTC, solar radiation is concentrated to a pipe coated selectively and enclosed in a glass tube with vacuum maintained in the annulus, through which a heat transfer fluid is circulated. Heat transfer analysis of PTC is important to determine the operating characteristics as well as for optimization of the parameters under different operating conditions. In this paper a heat transfer model is developed for receiver tube with the focus on a complete radiation heat transfer model for the annulus. For the analysis the receiver tube is divided into severe elements where the governing energy equations are discretized using Finite Volume Method. Gerhart factor is used for modelling the radiation heat transfer. View factors are computed using contour integration technique and analytical solutions. Heat transfer results are then validated with the test results obtained from Sandia National Laboratory. The results obtained show close agreement with the test results. Also the result is compared with other four published models. Based on the RMSE analysis, it is proven that our model is the best among all the four models compared.

中文翻译：

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使用完整辐射传热模型的抛物槽式集热器的热数学模型——一种新方法

摘要 太阳能抛物槽式集热器（PTC）是火力发电厂发电和热能的替代清洁解决方案。它可以配置为支持小型、中型和高温应用。在 PTC 中，太阳辐射被集中到一根管子上，该管子有选择地涂覆并封闭在玻璃管中，环形空间中保持真空，传热流体通过该管子循环。PTC 的传热分析对于确定运行特性以及优化不同运行条件下的参数非常重要。在本文中，开发了接收管的传热模型，重点是环空的完整辐射传热模型。为了进行分析，接收管被划分为严格的单元，其中使用有限体积方法离散控制能量方程。Gerhart 因子用于模拟辐射传热。使用轮廓积分技术和解析解来计算视角因子。然后使用从桑迪亚国家实验室获得的测试结果验证传热结果。获得的结果与测试结果非常吻合。还将结果与其他四个已发布的模型进行了比较。基于RMSE分析，证明我们的模型是所有四个比较模型中最好的。然后使用从桑迪亚国家实验室获得的测试结果验证传热结果。获得的结果与测试结果非常吻合。还将结果与其他四个已发布的模型进行了比较。基于RMSE分析，证明我们的模型是所有四个比较模型中最好的。然后使用从桑迪亚国家实验室获得的测试结果验证传热结果。获得的结果与测试结果非常吻合。还将结果与其他四个已发布的模型进行了比较。基于RMSE分析，证明我们的模型是所有四个比较模型中最好的。