An experimental and theoretical energy and exergy analysis was conducted for a cylindrical cavity receiver employed in a parabolic dish collector. Based on simultaneous energy and exergy analysis, the receiver average wall temperature and overall heat transfer coefficient were determined. A simplified Nusselt number for Heat Transfer Fluid (HTF) through the receiver as a function of Reynolds an...

an experimental and theoretical energy and exergy analysis was conducted for a cylindrical cavity receiver employed in a parabolic dish collector. based on simultaneous energy and exergy analysis, the receiver average wall temperature and overall heat transfer coefficient were determined. a simplified nusselt number for heat transfer fluid (htf) through the receiver as a function of reynolds an...

An experimental platform was designed and built for testing the thermal performance of a water/steam cavity receiver. The experimental platform was utilized to investigate the start-up performance and operation characteristics of the receiver. The electrical heating mode was chosen to simulate the non-uniform distribution of heat flux on the surface of absorber tubes inside the cavity. During s...

This letter proposes using the electromagnetic resonant modes of a hollow metallic structure to provide wireless power to small receivers contained anywhere inside. The coupling between a large chamber (used as a cavity resonator) and a small wire loop (used as a receiver) is studied. An analytic expression for the coupling coefficient between the fields in the cavity and a loop receiver is der...

An investigation into unsteady flow patterns in the cavity receiver of the Compact Linear Fresnel Reflector was performed using computational methods. Results indicate that periodic or even chaotic flow patterns may occur for some conditions and cavity designs. However, the results indicate that unsteadiness in the flow structure does not result in significant variation in the over heat loss ra...

Tubular cavity receivers offer excellent prospects as low-cost, high-efficiency heat collection elements for paraboloidal dish solar-thermal concentrators, as well as for central tower systems. Major heat loss mechanisms for these receivers are convection and radiative emission, as well as reflection and spillage (non-capture). Compared to glazed receivers, convection heat loss can be quite a l...