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ARTICLE
NUMERICAL THERMAL STUDY OF HEAT TRANSFER ENHANCEMENT IN LAMINAR-TURBULENT TRANSITION FLOW THROUGH ABSORBER PIPE OF PARABOLIC SOLAR TROUGH COLLECTOR SYSTEM
Marwa M. Ibrahima,*, Mohamed Mahran Kasemb,c
a Mechanical Engineering Department, National Research Centre (NRC), Dokki, Cairo, 12622, Egypt
b Aerospace Engineering Department, Cairo University, Giza, 12613, Egypt
c Nile University, Giza,16453, Egypt
*
Corresponding e-mail: yara_mh2003@yahoo.com
Frontiers in Heat and Mass Transfer 2021, 17, 1-11. https://doi.org/10.5098/hmt.17.20
Abstract
Currently electricity generation technologies by thermal energy conversions become strong demand. The objective of this paper is to present a novel
thermal study of absorber/receiver circular pipe of parabolic trough solar collector system for laminar and turbulent (k-ɛ model) fluids flow as well as
two-dimensional numerical simulation is performed using CFD ANSYS FLUENT software. Significant improvements in heat transfer and velocity
were discovered; the pattern of temperature distribution over the pipe absorber was displayed, and velocity vectors, pressure contours, and temperature
contours were studied. The impact of increasing the heat flux towards the pipe wall is discussed. Heat transfer coefficient and Nusselt number increases
with increasing of Reynolds number while drag and skin friction coefficients decrease when Reynolds number increases. The thermal performance
factor of PTC is estimated, and it is found 74% in laminar flow condition. The model is validated by comparing its results with analytical model results
and the validation approves the accuracy of the CFD analysis. In the future, it will be useful for solar thermal parabolic trough concentrators to study
different working fluids for heat transfer.
Keywords
Cite This Article
Ibrahim, M. M., Kasem, M. M. (2021). NUMERICAL THERMAL STUDY OF HEAT TRANSFER ENHANCEMENT IN LAMINAR-TURBULENT TRANSITION FLOW THROUGH ABSORBER PIPE OF PARABOLIC SOLAR TROUGH COLLECTOR SYSTEM.
Frontiers in Heat and Mass Transfer, 17(1), 1–11.