Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi University, Turkey
Approval Date: 2015
Thesis Language: Turkish
Student: Mustafa Demirci
Abstract:
In this study, thermo hydraulic analysis of a parabolic trough collector used in solar thermal power plants has been investigated on a computational fluid dynamics (CFD). In that respect, the pressure drop ΔP, friction factor f and temperature distribution T of dependence Reynolds Number (Re) of the superheated steam flow as heat-transfer fluid in the absorber tubes of the parabolic-trough solar collector have been analyzed effects, numerically. The numerical model has been designed and developed by the CFD package ANSYS-FLUENT with RNG Non-Equilibrium wall function turbulence model. The optimized mesh structures have been constructed and then data of numerical model was matching by the experimental data at 240,4 0C temperature and 3,21 MPa pressure of the solar test facility located at the Plataforma Solar de Almería, Spain. After the results have been compatible, the study has been performed at 0,499; 0,55; 0,6; 0,65; 0,7 ve 0,8 kg/s mass flows in the cases of 240,4 0C temperature and 3,21 MPa pressure and at 1,1; 1,2; 1,3; 1,4; 1,5 ve 1,6 kg/s mass flows in the cases of 500 0C temperature and 10 MPa pressure. In addition, the some other CFD studies have been realized influence of pressure for the fluid for 1; 2; 3; 4 and 5 MPa pressures, 1 kg/ mass flow and 300 0C temperature. Consequently, decided that Re is directly proportional to the pressure drop, inversely proportional to the friction factor and also pressure is inversely proportional to the pressure drop. In addition to these, correlations of related Re were achieved. Furthermore, effects of mass flow and pressure have been examined to temperature distribution in this study.