Experimental investigation and analysis on a concentrating solar collector using linear Fresnel lens

Experimental investigation and analysis on a concentrating solar collector using linear Fresnel lens
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线性菲涅尔透镜聚光太阳能集热器的实验研究与分析

DOI:
10.1016/j.enconman.2009.08.018
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发表时间:
2010
影响因子:
10.4
通讯作者:
--
中科院分区:
工程技术1区
文献类型:
--
作者:

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本文对一种基于线性菲涅耳透镜的聚光太阳能集热器进行了实验研究。这种太阳能集热器有望在相对较高的温度水平下获得比常用的平板或真空管太阳能集热器更高的热效率。实验结果表明,当转换温度(水)为90℃时,热效率约为50%,能量损失指标为0.578 W/m~2K,远小于目前常用的无聚光真空管集热器。为了进行分析,建立了线阵菲涅耳透镜加热真空管吸收器的数学模型。验证表明,该模型与实验数据吻合较好。分析表明,采用真空管吸收的菲涅耳透镜集热器在晴天转换温度接近200℃时仍有较好的效率(50%),并分析了环境条件和不同类型能量损失的百分比等因素的影响。
A concentrating solar collector based on linear Fresnel lens is investigated experimentally in this paper. This solar collector is expected to acquire a higher thermal efficiency at a relatively high temperature level than the commonly used flat-plate or evacuated tube solar collectors. Experimental results show that the thermal efficiency is about 50% when the conversion temperature (water) is 90°C. The test shows that the indication of lost energy is 0.578W/m2K, which is much smaller than that of commonly used evacuated tube solar collector without concentrating. In order to make analysis, a mathematical model for evacuated tube absorber heated by linear Fresnel lens has been built. The validation shows that the model agrees with the experimental data well. The analysis indicates that Fresnel lens collector with evacuated tube absorber has good efficiency (50%) in clear day even when the conversion temperature approaches 200°C. The influence of ambient conditions and the percent of different types of energy loss, etc., are also analyzed.
DOI: 10.1016/0741-983x(86)90017-2
发表时间: 1986
期刊: Solar & Wind Technology
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