A systematic computer-aided approach to cooling system optimal design in plastic injection molding

Series solutions for a nonlinear model of combined convective and radiative cooling of a spherical body

Buildings consume approximately 40% of the global energy use. A significant portion of the total consumed energy is used in heating and cooling the buildings. Passive concepts are appreciated for lowering energy consumption in heating/cooling the buildings and accomplishing indoor thermal comforts using natural energy resources. Earth air tunnel heat exchanger (EATHE) system is one of the passive technologies used for heating and cooling the buildings. The concept exploits the subsoil thermal energy and uses it for producing indoor thermal comforts in both summer and winter seasons. In this article, recent development in the design process of the technology and impacts of ground surface modifications and different design parameters were reviewed and discussed. The technology has received great attention in recent years and has been demonstrated successfully in few locations. The EATHE systems yielded substantial energy savings by using in stand alone as well as in hybrid mode with the conventional HVAC systems. Use of the system eventually led/may lead to lower GHGs emission and minimised impact of energy crises. This review article indicates that the EATHE technology can suitably be used in standalone as well as in integrated modes with other passive and conventional heating/cooling technologies. Despite many advantages, the technology may suffer from the economic constraint.

Recent advancements in earth air tunnel heat exchanger (EATHE) system for indoor thermal comfort application: A review

A comprehensive survey of the literature in the area of numerical heat transfer (NHT) published between 2000 and 2009 has been conducted Due to the immenseness of the literature volume, the survey

Literature Survey of Numerical Heat Transfer (2000–2009): Part II

Aiding and opposing mixed convection in a vertical porous layer with a finite wall heat source

This study addresses the Brinkman-extended Darcy model (Brinkman flow) of a laminar mixed-convection flow in an annular porous region. The primary objective of the present study is to help clarify the conditions under which the Brinkman term can be neglected in this flow without producing an unacceptable error. The simple geometry considered and the closed-form nature of the solution are advantageous in the demonstration of the importance of the wall effect. The results of this study can also be used in the evaluation of the accuracy of the numerical computations in more complex non-Darcian annular flows in the limiting case of the fully developed flow.

Boundary Effects in Laminar Mixed Convection Flow Through an Annular Porous Medium

Resultats preliminaires d'une etude experimentale d'un modele unidimensionnel de transfert de chaleur par convection thermoacoustique, entreprise dans le but de verifier l'importance de ce type de transfert de chaleur dans les environnements avec gravite ou avec gravite nulle par rapport a la conduction pure dans les fluides

Thermoacoustic convection heat-transfer phenomenon

Perturbation solution for spherical and cylindrical solidification by combined convective and radiative cooling

Unsteady temperature measurement in an enclosed thermoconvectively heated air

Solidification experiments in an enclosure are performed with caprillic acid as the phase-change fluid, and the experimental results for the temperature and solidification front advancement are presented. Caprillic acid, with its less than ambient melting point and low volume reduction on solidification, emerges as a good candidate for solidification experiments. An enthalpy formulation for convection/diffusion phase change in conjunction with an algorithm similar to SIMPLER is used in a formulation developed by Voller for solid-liquid phase change, to generate a numerical solution for lowand high-Prandtl-number fluids. The numerical solution is compared with solidification experimental data. In addition, the numerical solution is also compared with experimental melting data of Wolf and Viskanta for pure tin. The results indicate a good agreement between the experimental data and numerical solutions. This adds confidence to the formulation used in this numerical model.

Masood Parang

Papers

Boundary Effects in Laminar Mixed Convection Flow Through an Annular Porous Medium

Thermoacoustic convection heat-transfer phenomenon

Perturbation solution for spherical and cylindrical solidification by combined convective and radiative cooling

Unsteady temperature measurement in an enclosed thermoconvectively heated air

Experimental and numerical study of solidification and melting of pure materials