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Title: One-point fitting of the flux density produced by a heliostat

Abstract

Accurate and simple models for the flux density reflected by an isolated heliostat should be one of the basic tools for the design and optimization of solar power tower systems. In this work, the ability and the accuracy of the Universidad de Zaragoza (UNIZAR) and the DLR (HFCAL) flux density models to fit actual energetic spots are checked against heliostat energetic images measured at Plataforma Solar de Almeria (PSA). Both the fully analytic models are able to acceptably fit the spot with only one-point fitting, i.e., the measured maximum flux. As a practical validation of this one-point fitting, the intercept percentage of the measured images, i.e., the percentage of the energetic spot sent by the heliostat that gets the receiver surface, is compared with the intercept calculated through the UNIZAR and HFCAL models. As main conclusions, the UNIZAR and the HFCAL models could be quite appropriate tools for the design and optimization, provided the energetic images from the heliostats to be used in the collector field were previously analyzed. Also note that the HFCAL model is much simpler and slightly more accurate than the UNIZAR model. (author)

Authors:
 [1]
  1. Univ. Zaragoza, CPS-B, Dpto de Ingenieria Mecanica, Maria de Luna 3, 50018 Zaragoza (Spain)
Publication Date:
OSTI Identifier:
21305750
Resource Type:
Journal Article
Journal Name:
Solar Energy
Additional Journal Information:
Journal Volume: 84; Journal Issue: 4; Conference: International Conference CISBAT 2007; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0038-092X
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; FLUX DENSITY; HELIOSTATS; DESIGN; OPTIMIZATION; VALIDATION; ACCURACY; MATHEMATICAL MODELS; TOWER FOCUS POWER PLANTS

Citation Formats

Collado, Francisco J. One-point fitting of the flux density produced by a heliostat. United States: N. p., 2010. Web. doi:10.1016/J.SOLENER.2010.01.019.
Collado, Francisco J. One-point fitting of the flux density produced by a heliostat. United States. https://doi.org/10.1016/J.SOLENER.2010.01.019
Collado, Francisco J. Thu . "One-point fitting of the flux density produced by a heliostat". United States. https://doi.org/10.1016/J.SOLENER.2010.01.019.
@article{osti_21305750,
title = {One-point fitting of the flux density produced by a heliostat},
author = {Collado, Francisco J},
abstractNote = {Accurate and simple models for the flux density reflected by an isolated heliostat should be one of the basic tools for the design and optimization of solar power tower systems. In this work, the ability and the accuracy of the Universidad de Zaragoza (UNIZAR) and the DLR (HFCAL) flux density models to fit actual energetic spots are checked against heliostat energetic images measured at Plataforma Solar de Almeria (PSA). Both the fully analytic models are able to acceptably fit the spot with only one-point fitting, i.e., the measured maximum flux. As a practical validation of this one-point fitting, the intercept percentage of the measured images, i.e., the percentage of the energetic spot sent by the heliostat that gets the receiver surface, is compared with the intercept calculated through the UNIZAR and HFCAL models. As main conclusions, the UNIZAR and the HFCAL models could be quite appropriate tools for the design and optimization, provided the energetic images from the heliostats to be used in the collector field were previously analyzed. Also note that the HFCAL model is much simpler and slightly more accurate than the UNIZAR model. (author)},
doi = {10.1016/J.SOLENER.2010.01.019},
url = {https://www.osti.gov/biblio/21305750}, journal = {Solar Energy},
issn = {0038-092X},
number = 4,
volume = 84,
place = {United States},
year = {2010},
month = {4}
}