Augmentation of heat transfer from heat source placed downstream a guide fence: An experimental study

Heat transfer enhancement of a heat source located in a wake zone using rectangular vortex generators

“…The increase in the heat transfer in this type of channel depends largely on propelling the flow toward this region and disturbing the formed thermal boundary layer as discussed [12][13][14][15][16][17][18][19][20][21]. The present study aims to apply propelling flow strategy towards the recirculation zone between the heated blocks that simulating the electronic modules using VGs.…”

“…It was observed that perforation enhances the heat transfer coefficients and reduces the module temperature significantly. Also, Ali [18] studied experimentally the heat transfer from a heat source simulating an electronic chip mounted on a printed circuit board placed downstream of a guide fence at 5000 < 30,000. Correlations for the average Nusselt number were obtained as a function of Reynolds number, the guide fence height and separation distance.…”

Performance Enhancement of a Vapour Compression Refrigeration System Using Liquid-Suction Heat Exchanger

“…According to Ministry of Electricity and Energy in Egypt, the power factor, cos ∅, for the public network is ranged from 0.93 to 0.97; in the present study, it is assumed to be 0.95 [28,29]. The rate of heat energy transferred through the LSHE between the high and low-pressure refrigerants is calculated as follows:…”

An Experimental Study of the Convective Heat Transfer Enhancement: Application of Turbulence Promoters

“…In the recent technical literature, the number of works assessing methods for convection heat transfer enhancement due to turbulence promoters is quickly growing. Focusing only on experimental works (with interesting practical applications) that make use of vortex generators, one finds: (i) Gunes et al (2010) analysed the effects of turbulence promoters in a channel flow; The main findings indicate that a triangular promoter produces a maximum increment of around 35% on the local convective heat transfer rate; (ii) Ali (2009) evaluated the effect of a guide fence on convection heat transfer over a square heat source; Increments up to 20% on the mean convective heat transfer coefficient was reached; (iii) Chompookhan et al (2010) studied the effects of wedge ribs and winglet type vortex generators on convection heat transfer rate and friction loss behaviour in a channel; The main results indicate increments around 20% on the Nusselt number when the wedge rib promoter was used; (iv) Promvonge et al 2012presented an experimental study on turbulent heat transfer characteristics in a square duct fitted diagonally with angle finned-tape promoters; The experiments indicate that smaller fin pitch spacing provides the highest heat transfer rates.…”