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Experimental investigation of porous disc enhanced receiver for solar parabolic trough collector
, C. S. Ajay
Published in Elsevier Ltd
2015
Volume: 77
   
Pages: 308 - 319
Abstract
In this article, experimental investigation of 15m2 solar parabolic trough collector with porous disc enhanced receiver is carried out according to ASHRAE 93-1986 test procedure. Six different receiver configurations are developed and investigated to compare their performance. The performance of solar parabolic trough collector with two conventional and four porous disc receivers is characterized in terms of time constant, collector acceptance angle, peak performance, daily performance and heat loss tests. The tests are carried out for wide range of flow rates (100L/h-1000L/h) and weather conditions. Based on experimental investigation, the time constant of the parabolic trough collector is varied from 70s to 260s for different receiver configurations. The collector acceptance angle is determined for both un-shielded tubular receiver (USTR) and shielded tubular receiver (STR) as 0.58° and 0.68° respectively. The collector efficiencies are obtained as in the range of 63.9%-66.66% under ASHRAE standard test condition. Off-Sunset heat loss test is conducted to determine the steady state heat losses from the parabolic trough collector receiver. The heat losses from the parabolic trough collector are in the range of 455W/m2-1732W/m2 for average fluid temperature of Tamb+30°C. Stagnation temperature of the collector is obtained as 258°C and 312°C respectively for USTR and STR corresponding to direct normal insolation (DNI) of 786W/m2 and 761W/m2. Based on the above analysis, the porous disc enhanced receiver improves the performance of the parabolic trough collector significantly and it can be used effectively for process heat applications. © 2014 Elsevier Ltd.
About the journal
JournalData powered by TypesetRenewable Energy
PublisherData powered by TypesetElsevier Ltd
ISSN09601481
Open AccessNo
Concepts (22)
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    Acceptance tests
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    Heat losses
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    Solar collectors
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    Solar energy
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    Testing
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    ACCEPTANCE ANGLE
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    AVERAGE FLUID TEMPERATURES
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    Experimental investigations
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    Parabolic trough collectors
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    Peak performance
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    Performance analysis
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    POROUS DISCS
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    PROCESS HEAT
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    Collector efficiency
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    Energy efficiency
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    Experimental study
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    Heating
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    INSOLATION
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    Performance assessment
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    Porosity
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    Renewable resource
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    Solar power