Investigation of temperature distribution on a new linear Fresnel receiver assembly under high solar flux

Parikh, Abhishek S.; Martinek, Janna G.; Mungas, Greg; Kramer, Nick; Braun, Robert; Zhu, Guangdong

doi:10.1002/er.4374

Title: Investigation of temperature distribution on a new linear Fresnel receiver assembly under high solar flux

Journal Article · 27 May 2019 · International Journal of Energy Research

DOI: https://doi.org/10.1002/er.4374 · OSTI ID:1526199

Parikh, Abhishek S. ^[1]; Martinek, Janna G. ^[1]; Mungas, Greg ^[2]; Kramer, Nick ^[2]; Braun, Robert ^[3];

^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Hyperlight Energy, Lakeside, CA (United States)
Colorado School of Mines, Golden, CO (United States)

A linear Fresnel collector design with an operation temperature of 300 degrees C or above typically requires a solar flux concentration ratio of at least 20 on the surfaces of the receiver assembly. For the commercial linear Fresnel collector design in this work, the receiver assembly includes a secondary reflector and an evacuated receiver tube. The high-concentration solar flux may impose additional operating-temperature requirements on the secondary reflector and receiver tube. Thus, a careful heat-transfer analysis is necessary to understand the operating temperature of the receiver assembly component surfaces under design and off-design conditions to guide appropriate material selections. In this work, a numerical heat-transfer analysis is performed to calculate the temperature distribution of the surfaces of the secondary reflector and receiver glass envelope for a commercial collector design. Operating conditions examined in the heat-transfer analysis include various wind speeds and solar concentration ratios. The results indicate a surface temperature higher than 100 degrees C on the secondary reflector surface, which suggests that a more advanced secondary reflector material is needed. The established heat-transfer model can be used for optimization of the other types of linear Fresnel collectors.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1526199

Alternate ID(s):: OSTI ID: 1515802

Report Number(s):: NREL/JA-5500-70084

Journal Information:: International Journal of Energy Research, Vol. 43, Issue 9; ISSN 0363-907X

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 5 works

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47 OTHER INSTRUMENTATION
concentrating solar power
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solar flux
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Title: Investigation of temperature distribution on a new linear Fresnel receiver assembly under high solar flux

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