Author/Authors :
Nestor Herna´ndez a، نويسنده , , David Riveros-Rosas b، نويسنده , , Eduardo Venegas a، نويسنده , , Rube´n J. Dorantes c، نويسنده , ,
Armando Rojas-Mor?´n d، نويسنده , , O.A. Jaramillo، نويسنده , , Camilo A. Arancibia-Bulnes a، نويسنده , , ?، نويسنده , , 1، نويسنده , ,
Claudio A. Estrada b، نويسنده ,
Abstract :
The design and optimization of novel type of receiver for a paraboloidal concentrator with 90 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 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.
2011 Elsevier Ltd. All rights reserved
Keywords :
Solar concentrator , Paraboloidal concentrator , Conical receiver , Cavity receiver
