scholarly journals NUMERICAL INVESTIGATION OF NON-UNIFORM HEAT TRANSFER ENHANCEMENT IN PARABOLIC TROUGH SOLAR COLLECTORS USING DUAL MODIFIED TWISTED-TAPE INSERTS

2020 ◽  
pp. 133-147
Author(s):  
Farhad AFSHARPANAH ◽  
Amirhossein Zabihi SHESHPOLİ ◽  
Khashayar PAKZAD ◽  
Seyed Soheil Mousavi AJAROSTAGHİ
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Numerical Investigation ◽  
Twisted Tape ◽  
Solar Collectors ◽  
Transfer Enhancement ◽  
Parabolic Trough ◽  
Uniform Heat

scholarly journals Numerical investigation of heat transfer enhancement inside a parabolic trough solar collector using dimpled absorber

2017 ◽  
Vol 2 (2) ◽  
pp. 01
Author(s):  
Amina Benabderrahmane
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Numerical Investigation ◽  
Solar Collector ◽  
Three Dimensional ◽  
Finite Volume Methods ◽  
Transfer Enhancement ◽  
Parabolic Trough ◽  
Remarkable Effect ◽  
Parabolic Trough Solar Collector

Three dimensional numerical investigation of heat transfer enhancement in a non-uniformly heated parabolic trough solar collector using dimpled absorber under turbulent flow was incorporated in the current paper. The governing equations were solved using the finite volume methods (CFD) with certain assumptions and appropriate boundary conditions. The Monte Carlo ray trace technique was applied to obtain the heat flux distribution around the absorber tube. The numerical results were validating with the empirical correlations existing in the literature and good agreement was obtained. The present results demonstrate that the inclusion of inserts provide a good performance in heat transfer,   also the receiver temperature gradient are shown to reduce with the use of geometrical modification, the absorber geometry have a remarkable effect on the HTF velocity distribution.

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