A compound parabolic concentrator (CPC) combined with a vacuum heat pipe forms a solar collector system capable of efficiently converting solar radiation into medium-temperature heat energy. However, conventional all-glass solar vacuum tubes are characterized by high-temperature heat energy retention, significant resistance to heat energy output, and limited frost resistance during colder seasons. Furthermore, there is a relative scarcity of research on the synergistic effects of CPC-coupled heat pipes, with most numerical simulations of heat pipes being two-dimensional in nature. This study presents a novel solar collector system developed by integrating CPC with all-glass superconducting heat pipes (SHP), and it investigates the synergy between CPC and SHP. Both experimental studies and three-dimensional numerical simulations are employed to examine the impact of the SHP inclination angle on collector performance. Subsequently, the fundamental principles of two-phase heat transfer and the light-to-heat conversion performances of SHP are analysed. The findings indicate that the numerical simulations of the collector performance of the all-glass superconducting heat pipe align closely with experimental measurements, with a maximum relative error of 6.71 % in the condensing section temperature. Additionally, the results demonstrate that the integration of SHP with CPC significantly enhances collector temperature, achieving a condensing section temperature of 383.6 K, with an optimal working inclination angle of 50°.

中文翻译：

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非成像聚光器耦合全玻璃太阳能超导热管及其光热转换表征研究


复合抛物面聚光器 （CPC） 与真空热管相结合，形成太阳能集热器系统，能够有效地将太阳辐射转化为中温热能。然而，传统的全玻璃太阳能真空管的特点是高温热能保留、对热能输出的显着抵抗力以及在寒冷季节的抗冻性有限。此外，关于 CPC 耦合热管协同效应的研究相对稀少，大多数热管的数值模拟本质上是二维的。本研究提出了一种通过将 CPC 与全玻璃超导热热管 （SHP） 集成而开发的新型太阳能集热器系统，并研究了 CPC 和 SHP 之间的协同作用。采用实验研究和三维数值模拟来检验 SHP 倾角对集热器性能的影响。随后，分析了两相传热的基本原理和 SHP 的光-热转换性能。结果表明，全玻璃超导热管集热器性能的数值模拟与实验测量结果密切相关，冷凝段温度的最大相对误差为 6.71 %。此外，结果表明，SHP 与 CPC 的集成显著提高了集热器温度，实现了 383.6 K 的冷凝段温度，最佳工作倾角为 50°。