Performance Evaluation of the 200-kWth HiTRec-II Open Volumetric Air Receiver

[+] Author and Article Information
Bernhard Hoffschmidt

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Solare Energietechnik, D 51170 Köln, Germanye-mail: Bernhard.Hoffschmidt@dlr.de

Félix M. Téllez

CIEMAT/DER-PSA, Avda. Complutense, 22, E-28040, Madrid, Spain

Antonio Valverde, Jesús Fernández

CIEMAT/DER-PSA, Apartado, 22, E-04200 Tabernas, Spain

Valerio Fernández

SOLUCAR, Avda. de la Buaira, 2, E-41018 Sevilla, Spain

J. Sol. Energy Eng 125(1), 87-94 (Jan 27, 2003) (8 pages) doi:10.1115/1.1530627 History: Received June 01, 2001; Revised April 01, 2002; Online January 27, 2003
Copyright © 2003 by ASME
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Schematic drawing of the HiTRec receiver principle
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Cross-section of the HiTRec-II receiver design
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Front view of the HiTRec-II receiver during test campaign
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Schematic drawing for receiver evaluation (Dotted lines: additional scheme for air returns ratio evaluation)
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Comparison of measured (left) and 2-D interpolation (right) thermal maps (in °C) of HiTRec-II absorber in the time in which cup 21 broke. Observe in the left image how the center of cup 21 is highly colder than its boundary. Bottom part of the right image appears cold because the broken sensors were not used for spatial interpolation (The seven broken sensors are marked with “X”).
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Failure of absorber module (C21)
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Example of steady state periods in the time series highlighted for a sunrise to sunset test day (13.02.01)(each square represents 3 min of steady-state conditions)
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Receiver steady-state thermal efficiency versus outlet air temperature and linear regression for resultant efficiencies from both incident solar power measurement systems: MDF (dashed line) and PROHERMES
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Thermal efficiency and average outlet temperature versus the ratio between the power to receiver and air mass flow rate
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Air temperatures and wind speed versus air return ratio




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