In the present study, performance of the fabricated evacuated U-tube solar collector integrated parabolic reflector (EUSCIPR) and conventional evacuated U-tube solar collector (CEUSC) are analysed experimentally. With reference to humid climatic conditions, a 3D model is developed for comparing the thermal performance of EUSCIPR with a CEUSC. Developed model is validated with field test data and found in good agreement among them. Heat transfer fluid (HTF) temperature difference, energy intake/heat gain and thermal efficiency of the solar collectors are investigated experimentally at various ambient temperatures and solar intensities. From the experimental investigations, it was observed that, in a sunny day, the energy losses incurred across the solar collectors was high during peak hour (1: 20 PM). From the numerical studies, it is found that within the given operating range, the thermal efficiency of the EUSCIPR is 14.1% higher than CEUSC. Further, for a given inlet condition, the contour plots for variation of HTF temperature along the U-tube of EUSCIPR and CEUSC are predicted numerically, and the obtained results are discussed in detail.

在本研究中，对制造的真空 U 型管太阳能集热器集成抛物面反射器 (EUSCIPR) 和传统真空 U 型管太阳能集热器 (CEUSC) 的性能进行了实验分析。参考潮湿的气候条件，开发了一个 3D 模型，用于比较 EUSCIPR 与 CEUSC 的热性能。开发的模型与现场测试数据进行了验证，发现它们之间具有良好的一致性。在各种环境温度和太阳能强度下，通过实验研究了传热流体 (HTF) 温差、能量摄入/热量增益和太阳能集热器的热效率。从实验调查中可以看出，在晴天，在高峰时段（下午 1 点 20 分），太阳能集热器产生的能量损失很高。从数值研究来看，发现在给定的工作范围内，EUSCIPR的热效率比CEUSC高14.1%。此外，对于给定的入口条件，沿 EUSCIPR 和 CEUSC 的 U 形管的 HTF 温度变化的等值线图进行了数值预测，并详细讨论了获得的结果。