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Title: Improved power efficiency for very-high-temperature solar-thermal-cavity receivers

Abstract

This invention is an improved solar energy cavity receiver for exposing materials and components to high temperatures. The receiver includes a housing having an internal reflective surface defining a cavity and having an inlet for admitting solar radiation thereto. A photothermal absorber is positiond in the cavity to receive radiation from the inlet. A reflective baffle is positioned between the absorber and the inlet to severely restrict the re-radiation of energy through the inlet. The front surface of the baffle defines a narrow annulus with the internal reflective surface of the housing. The front surface of the baffle is contoured to reflect incoming radiation onto the internal surface of the housing, from which it is reflected through the annulus and onto the front surface of the absorber. The back surface of the baffle intercepts radiation from the front of the absorber. With this arrangement, a high percentage of the solar power input is retained in the cavity; thus, high internal temperatues are attained.

Inventors:
;
Issue Date:
OSTI Identifier:
6595072
Application Number:
ON: DE83006893
Assignee:
ERA-08-017686; EDB-83-049204
DOE Contract Number:  
NAS-7-100-954873
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; CAVITY RECEIVERS; DESIGN; BAFFLES; REFLECTIVE COATINGS; SOLAR ABSORBERS; COATINGS; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS; SOLAR EQUIPMENT; SOLAR RECEIVERS 141000* -- Solar Collectors & Concentrators; 140702 -- Solar Thermal Power Systems-- Central Receiver; 140909 -- Solar Thermal Utilization-- Miscellaneous Solar Applications-- (1980-)

Citation Formats

McDougal, A.R., and Hale, R.R. Improved power efficiency for very-high-temperature solar-thermal-cavity receivers. United States: N. p., 1982. Web.
McDougal, A.R., & Hale, R.R. Improved power efficiency for very-high-temperature solar-thermal-cavity receivers. United States.
McDougal, A.R., and Hale, R.R. Wed . "Improved power efficiency for very-high-temperature solar-thermal-cavity receivers". United States.
@article{osti_6595072,
title = {Improved power efficiency for very-high-temperature solar-thermal-cavity receivers},
author = {McDougal, A.R. and Hale, R.R.},
abstractNote = {This invention is an improved solar energy cavity receiver for exposing materials and components to high temperatures. The receiver includes a housing having an internal reflective surface defining a cavity and having an inlet for admitting solar radiation thereto. A photothermal absorber is positiond in the cavity to receive radiation from the inlet. A reflective baffle is positioned between the absorber and the inlet to severely restrict the re-radiation of energy through the inlet. The front surface of the baffle defines a narrow annulus with the internal reflective surface of the housing. The front surface of the baffle is contoured to reflect incoming radiation onto the internal surface of the housing, from which it is reflected through the annulus and onto the front surface of the absorber. The back surface of the baffle intercepts radiation from the front of the absorber. With this arrangement, a high percentage of the solar power input is retained in the cavity; thus, high internal temperatues are attained.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {4}
}