Abstract For design and component specification of a Linear Fresnel Collector (LFC) cavity receiver, the prediction of temperature distribution and heat loss is of great importance. In this paper we present a sensitivity analysis for a range of geometry and material parameters. For the LFC receiver analysis we use two models developed at Fraunhofer ISE. One is a detailed model, combining the spatial distribution of reflected radiation via ray tracing with detailed convective simulations through computational fluid dynamics. The second one is a fast algorithm based on a thermal resistance model. It is applying a similar methodology as the well-known model for vacuum absorber, enhancing an absorber tube model by parameters describing the influence of the secondary mirror and cover glass. The thermal resistance model is described in detail. Obtained results indicate a significant effect of the secondary mirror temperature on heat loss for specific geometries.
[1]
M. Modest.
Radiative heat transfer
,
1993
.
[2]
R. Forristall,et al.
Heat Transfer Analysis and Modeling of a Parabolic Trough Solar Receiver Implemented in Engineering Equation Solver
,
2003
.
[3]
K. N. Seetharamu,et al.
Fundamentals of the Finite Element Method for Heat and Fluid Flow
,
2004
.
[4]
Max Mertins.
Technische und wirtschaftliche Analyse von horizontalen Fresnel-Kollektoren
,
2008
.
[5]
Henning Helmers,et al.
Optical analysis of deviations in a concentrating photovoltaics central receiver system with a flux homogenizer.
,
2013,
Applied optics.
[6]
Jan Fabian Feldhoff,et al.
Linear Fresnel Collector Demonstration at the PSA - Operation and Investigation
,
2009
.