Título del libro: Proceedings Of The Asme 3rd International Conference On Energy Sustainability 2009, Es2009
Título del capítulo: A parametric study of conjugate heat transfer of solar chimney
JOSE LUIS ARCE SALDAÑA;
Autores externos:
Idioma:
Inglés
Año de publicación:
2009
Palabras clave:
Ambient air temperature; Ambient temperatures; Computer codes; Conjugate heat transfer; Conjugated heat transfer; Conservation equations; Finite volume technique; Forced ventilation; Heat transfer correlation; Hot surface; In-buildings; Natural sources; Natural ventilation; Numerical studies; Parametric study; Passive technique; Passive ventilation; Solar chimney; Solar irradiances; Steady state; Turbulence equations; Turbulent air flow; Turbulent models; Air quality; Heat exchangers; Heat transfer; Reinforced concrete; Reynolds number; Solar absorbers; Solar radiation; Sustainable development; Two dimensional; Ventilation; Solar chimneys
Resumen:
Recently, new buildings are being designed considering natural sources such as natural ventilation as a passive technique. Solar chimneys are among those techniques of passive ventilation systems in buildings, to enhance the air quality and some times the thermal comfort. In this work, a numerical study of a solar chimney for forced ventilation is carried out. Also a parametric study varying the ambient air temperature, the solar irradiance and Reynolds number is considered. The dimensions of the solar chimney are 4.0 m high, and 0.35 m deep, the absorber surface of the solar chimney was 0.15 m thick of reinforced concrete. The conservation equations of mass, momentum, energy and two turbulence equations are solved under some simplifications such as: 2-D, incompressible, steady state turbulent air flow and conjugated heat transfer (conduction, forced convection and radiation), k-? turbulent model was implemented and finite volume technique was applied to solve the conservation equations. In order to guarantee the right performance of the computer code, it was reduced to cases reported in the literature and verified; also, it was validated with an experiment. The variation of ambient temperature, solar irradiance and Reynolds number are analyzed in the parametric study. The heat transfer correlations for total Nusselt number (convective plus radiative) are introduced. From the results, it was found that the heat transfer increases as the Reynolds number increases for the hot surface of the solar chimney. Copyright © 2009 by ASME.
Entidades citadas de la UNAM:
ISBN:
9780791848890
Editorial:
