A Theoretical Investigation of a Capillary Heat Pipe Coupled to a Parabolic Trough Solar Collector

2021 ◽  
Author(s):  
Boukhalfa Mohammed ◽  
Mustapha Merzouk ◽  
Nachida Kasbadji Merzouk ◽  
Michel Feidt ◽  
Nicolas Blet
Keyword(s):  
Heat Pipe ◽  
Theoretical Investigation ◽  
Solar Collector ◽  
Parabolic Trough ◽  
Parabolic Trough Solar Collector

Impact of Gas-Filled Annular Space on Thermal and Optical Performances of a Heat Pipe Parabolic Trough Solar Collector

2021 ◽  
Vol 143 (6) ◽  
Author(s):  
Moulay Ahmed Janan ◽  
Mohamed Taqi ◽  
Hamid Chakir
Keyword(s):  
Heat Pipe ◽  
Solar Collector ◽  
Critical Value ◽  
Heat Losses ◽  
Inert Gas ◽  
Annular Space ◽  
Parabolic Trough ◽  
Parabolic Trough Solar Collector ◽  
Helium Neon ◽  
Glass Envelope

Abstract In this work, we demonstrate the improvement of thermal performances of a heat pipe parabolic trough solar collector by optimizing the annulus space, between the evaporator and the glass envelope, and using an appropriate filling gas. We compared the system thermal effectiveness for nine filling gases (hydrogen, air, helium, neon, oxygen, nitrogen, argon, krypton, and xenon). The results showed that using xenon or krypton leads to the best thermal yield (70%). While krypton arises to be the most energetically efficient filling gas, argon, with a thermal yield of 62%, presents a best compromise as the cheapest inert gas. In addition, we showed that the annular space size should be less than a critical value to minimize heat losses and to reduce the material cost during manufacturing.

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