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Title: Secondary reflectors for solar collectors and methods of making the same

Abstract

The present disclosure relates to a device that includes a reflecting surface having a length aligned along a first axis (z), where a cross-section of the reflecting surface in a plane perpendicular to the first axis (z) forms a curve comprising a concave section positioned between a first endpoint and a second endpoint, at least a portion of the concave section is accurately approximated by a polynomial equation, an aperture is formed by a straight line connecting the first endpoint to the second endpoint, and the concave section is configured to focus a plurality of beams of light passing through the aperture onto a focal point.

Inventors:
Issue Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1771533
Patent Number(s):
10808965
Application Number:
15/631,522
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/23/2017
Country of Publication:
United States
Language:
English

Citation Formats

Zhu, Guangdong. Secondary reflectors for solar collectors and methods of making the same. United States: N. p., 2020. Web.
Zhu, Guangdong. Secondary reflectors for solar collectors and methods of making the same. United States.
Zhu, Guangdong. Tue . "Secondary reflectors for solar collectors and methods of making the same". United States. https://www.osti.gov/servlets/purl/1771533.
@article{osti_1771533,
title = {Secondary reflectors for solar collectors and methods of making the same},
author = {Zhu, Guangdong},
abstractNote = {The present disclosure relates to a device that includes a reflecting surface having a length aligned along a first axis (z), where a cross-section of the reflecting surface in a plane perpendicular to the first axis (z) forms a curve comprising a concave section positioned between a first endpoint and a second endpoint, at least a portion of the concave section is accurately approximated by a polynomial equation, an aperture is formed by a straight line connecting the first endpoint to the second endpoint, and the concave section is configured to focus a plurality of beams of light passing through the aperture onto a focal point.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {10}
}

Works referenced in this record:

Line-focusing concentrating solar collector-based power plants: a review
journal, June 2016


An experimental and computational study of the heat loss characteristics of a trapezoidal cavity absorber
journal, January 2004


Solar linear Fresnel collector using molten nitrates as heat transfer fluid
journal, February 2011


Light collectors in cylindrical geometry
patent, May 1976


Projection system comprising a free form reflector and a free form lens
patent, August 1998


Thermal performance of linear Fresnel reflecting solar concentrator with trapezoidal cavity absorbers
journal, February 2010


Focussing solar collector
patent, January 1981