scholarly journals A parabolic trough solar collector as a solar system for heating water: a study based on numerical simulation

2017 ◽  
Vol 2 (2) ◽  
pp. 29
Author(s):  
Mokhtar Ghodbane ◽  
Boussad Boumeddane
Keyword(s):  
Numerical Simulation ◽  
Solar Collector ◽  
Tap Water ◽  
Energy Balance Equation ◽  
Thermal Study ◽  
Fluid Temperature ◽  
Parabolic Trough ◽  
Heating Water ◽  
Small Model ◽  
Parabolic Trough Solar Collector

This paper is an optical and thermal study of a small model of a parabolic trough solar collector (CTP), which will be used to heat tap water in the winter at Guemar, El-Oued province, Algeria. A mathematical model drawn from the energy balance equation applied to the absorber tube, this model was solved by the finite difference method. A computer program was developed to solve our problem. MATLAB was used as a tool for numerical simulation where it is used to calculate dynamic shifts at the level of the absorbent tube. The results are very honorable and encouraging, where the thermal efficiency of the concentrator had passed 61%, and the fluid temperature had passed 343 K.

Numerical simulation of wind flow around a parabolic trough solar collector

2013 ◽  
Vol 107 ◽  
pp. 426-437 ◽  
Author(s):  
A.A. Hachicha ◽  
I. Rodríguez ◽  
J. Castro ◽  
A. Oliva
Keyword(s):  
Numerical Simulation ◽  
Solar Collector ◽  
Wind Flow ◽  
Parabolic Trough ◽  
Parabolic Trough Solar Collector

Analytical Solution of the Transient Heat Conduction in the Absorber Tube of a Parabolic Trough Solar Collector Under Quasi-Steady Conditions

2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Roger Cundapí ◽  
Sara L. Moya ◽  
Octavio Cazarez
Keyword(s):  
Heat Conduction ◽  
Steady State ◽  
Analytical Solution ◽  
Solar Collector ◽  
Transient Heat Conduction ◽  
Step Function ◽  
Operating Conditions ◽  
Fluid Temperature ◽  
Parabolic Trough ◽  
Parabolic Trough Solar Collector

Abstract Temperature fields and their transient behaviors are essential subjects to be considered for modeling and design of absorber tubes in concentrated solar power plants. Both subjects have been addressed by various authors. However, the first subject has been primarily solved in the steady state. While the second has been solved by considering transient variations in the environmental or operating conditions, but with a heat conduction model in steady state. To the best of our knowledge, there are no analytical transient two-dimensional (2D) (r, φ) solutions involving nonuniform heat flux distribution (NUHFD) on the absorber tube of a parabolic trough solar collector (PTC). This study aims to obtain an analytical solution for the transient heat conduction in 2D of the absorber tube. The analytical solution was obtained using the method of separation of variables and the superposition principle. Two NUHFD functions were analyzed: a step function and a local concentration ratio (LCR) function. To the first function, the effect of the inlet fluid temperature and efficiency were also studied. The results agree with experimental and numerical results from the literature. The maximum average root-mean-square was near 6.4% for the step function, while the maximum average error was 1% for LCR function. The theoretical energy balances corroborate the validity of the analytical solution. The analytical solution could be useful to compare other theoretical studies (e.g., to prove new numerical schemes), to simulate other parameters of design, and to calibrate experimental tests. Even this work could be extended for nonlinear boundary conditions.

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