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Title: Flux attenuation at NREL`s High-Flux Solar Furnace

Abstract

The High-Flux Solar Furnace (HFSF) at the National Renewable Energy Laboratory (NREL) has a faceted primary concentrator and a long focal-length-to-diameter ratio (due to its off-axis design). Each primary facet can be aimed individually to produce different flux distributions at the target plane. Two different types of attenuators are used depending on the flux distribution. A sliding-plate attenuator is used primarily when the facets are aimed at the same target point. The alternate attenuator resembles a venetian blind. Both attenuators are located between the concentrator and the focal point. The venetian-blind attenuator is primarily used to control the levels of sunlight failing on a target when the primary concentrators are not focused to a single point. This paper will demonstrate the problem of using the sliding-plate attenuator with a faceted concentrator when the facets are not aimed at the same target point. We will show that although the alternate attenuator necessarily blocks a certain amount of incoming sunlight, even when fully open, it provides a more even attenuation of the flux for alternate aiming strategies.

Authors:
; ;
Publication Date:
Research Org.:
National Renewable Energy Lab., Golden, CO (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10194579
Report Number(s):
NREL/TP-471-7294; CONF-950336-9
ON: DE95000219; BR: WM1020000
DOE Contract Number:  
AC36-83CH10093
Resource Type:
Conference
Resource Relation:
Conference: American Society of Mechanical Engineers/Japanese Society of Mechanical Engineers/Japan Solar Energy Society international solar energy conference,Lahaina, HI (United States),19-24 Mar 1995; Other Information: PBD: Oct 1994
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; SOLAR FURNACES; TESTING; ATTENUATION; SOLAR CONCENTRATORS; OPTICS; COMPUTERIZED SIMULATION; HIGH-FLUX SOLAR FURNACE; SOLAR; SLIDING-PLATE ATTENUATOR; 140900; 141000; SOLAR THERMAL UTILIZATION; SOLAR COLLECTORS AND CONCENTRATORS

Citation Formats

Bingham, C E, Scholl, K L, and Lewandowski, A A. Flux attenuation at NREL`s High-Flux Solar Furnace. United States: N. p., 1994. Web.
Bingham, C E, Scholl, K L, & Lewandowski, A A. Flux attenuation at NREL`s High-Flux Solar Furnace. United States.
Bingham, C E, Scholl, K L, and Lewandowski, A A. 1994. "Flux attenuation at NREL`s High-Flux Solar Furnace". United States. https://www.osti.gov/servlets/purl/10194579.
@article{osti_10194579,
title = {Flux attenuation at NREL`s High-Flux Solar Furnace},
author = {Bingham, C E and Scholl, K L and Lewandowski, A A},
abstractNote = {The High-Flux Solar Furnace (HFSF) at the National Renewable Energy Laboratory (NREL) has a faceted primary concentrator and a long focal-length-to-diameter ratio (due to its off-axis design). Each primary facet can be aimed individually to produce different flux distributions at the target plane. Two different types of attenuators are used depending on the flux distribution. A sliding-plate attenuator is used primarily when the facets are aimed at the same target point. The alternate attenuator resembles a venetian blind. Both attenuators are located between the concentrator and the focal point. The venetian-blind attenuator is primarily used to control the levels of sunlight failing on a target when the primary concentrators are not focused to a single point. This paper will demonstrate the problem of using the sliding-plate attenuator with a faceted concentrator when the facets are not aimed at the same target point. We will show that although the alternate attenuator necessarily blocks a certain amount of incoming sunlight, even when fully open, it provides a more even attenuation of the flux for alternate aiming strategies.},
doi = {},
url = {https://www.osti.gov/biblio/10194579}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Oct 01 00:00:00 EDT 1994},
month = {Sat Oct 01 00:00:00 EDT 1994}
}

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