Conical receiver for a paraboloidal concentrator with large rim angle

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• 作者：Nestor Herná ; ndez^a ; David Riveros-Rosas^b ; Eduardo Venegas^a ; Rubé ; n J. Dorantes^c ; Armando Rojas-Morí ; n^d ; O.A. Jaramillo^a ; Camilo A. Arancibia-Bulnes^a ; ¹ ; ^{caab@cie.unam.mx} ; Claudio A. Estrada^a
• 关键词：Solar concentrator ; Paraboloidal concentrator ; Conical receiver ; Cavity receiver
• 刊名：Solar Energy
• 出版年：2012
• 期刊代码：80_0038092x
• 类别：ce
• 出版时间：April, 2012
• 卷：86
• 期：4
• 页码：1053-1062
• 文件大小：1149 K

摘要

The design and optimization of novel type of receiver for a paraboloidal concentrator with 90掳 rim angle is carried out by means of detailed ray tracing simulations. Cylindrical, conical, and spherical geometries are compared and their dimensions optimized. The chosen design is based on a conical cavity, which differs from similar receivers developed for concentrators with smaller rim angles. In particular, the receiver is able to catch concentrated solar energy both on its outer side and on the inner walls. Water flows inside the receiver along the conical geometry, in a double layer configuration. The receiver was built and implemented in a 90掳 rim angle paraboloidal concentrator. Thermal efficiency of the system is evaluated for different flow rates and inlet temperatures, both in stationary and in transient regimes, and results for fluid temperatures are compared with the results predicted by a thermal model. The time constant is evaluated.