Linear Fresnel collector receiver: heat loss and temperatures

被引：31
|
作者：
Heimsath, A. [1 ]
Cuevas, F. [1 ]
Hofer, A. [1 ]
Nitz, P. [1 ]
Platzer, W. J. [1 ]
机构：
[1] Fraunhofer Inst Solar Energy Syst, Devisiont Solar Thermal & Opt, D-79110 Freiburg, Germany
来源：
PROCEEDINGS OF THE SOLARPACES 2013 INTERNATIONAL CONFERENCE | 2014年 / 49卷
关键词：
Linear Fresnel collector; cavity receiver; heat loss; thermal model;
D O I：
10.1016/j.egypro.2014.03.042
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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. (C) 2013 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
引用
收藏
页码：386 / 397
页数：12
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