... convection of low-melting-point metals in small/mini-channels, typical in compact electronic devices, is carefully argued. Some special aspects pertaining to the practical application of this cooling technique, including the entrance effect, mixed convection, and compact liquid metal heat exchanger design...

...Temesgen Garoma; Ramin E. Yazdi This study is part of a broader study on a novel method for harvesting algae by evaporation, and it investigated the feasibility of heating algal biomass using low-grade waste heat in a heat exchanger. Computational fluid dynamic (CFD) analysis was performed...

...-and-Tube Heat Exchangers in the Case of Varying Fluid Flow Rates ,” ASME Int. J. Heat Transfer , 40 , pp. 2067 – 2079 . [4] Chang , S. C. , and Kweon , Y. C. , 1999 , “ A Numerical Analysis on the Transient Heat Transfer in a Heat Exchanger Pipe Flow ,” J. Korean Nucl. Soc. , 32...

... exchangers without prohibitive costs and pressure drops. For this reason, they are widely adopted for automotive applications. However, in order to improve louvered-fin compact heat exchangers, it is strongly required to understand how louvered fins behave regarding both heat transfer and pressure drop...

... a positive effect on heat transfer rate at first fin for each parameter and at second fin for all Prandtl numbers and high Reynolds numbers. But at outlet fin the porous medium has negative effect on heat transfer rate except Pr = 5. Finally, it is found that by reducing porosity, the heat exchanger reaches...

... be readily found from the laminar annular flow solutions. Significant differences are found between these and values from approximate equations. condensation microchannel surface tension pressure drop refrigerant heat exchanger Two-phase flow in channels, with or without phase change...

...Eph Sparrow; John Gorman; John Abraham The results presented in both Fig. 5 and Table 3 provide clear support for the use of the U = constant model for situations where turbulent flow prevails in both the pipe and annulus for the double-pipe heat exchanger. The numerical...

... , “ Experimental Investigation of Capillary-Assisted Solution Wetting and Heat Transfer Using a Micro-Scale, Porous-Layer Coating on Horizontal-Tube, Falling-Film Heat Exchanger ,” Int. J. Refrigeration , 35 , pp. 1176 – 1187 . 10.1016/j.ijrefrig.2011.11.015 [20] Faghri , A. , 1995 , Heat Pipe...

... of the best pin-fin sink quoted above. metal foam blade heat transfer heat exchanger Experimental results of Bunker [ 1 ] followed by CFD simulations of Xie et al. [ 2 ] show an increase in internal blade tip-cap cooling as a result of using arrays of shaped pins. These involve evaluating...

...Feng Zhou; Nicholas E. Hansen; David J. Geb; Ivan Catton Modeling a fin-and-tube heat exchanger as porous media based on volume averaging theory (VAT), specific geometry can be accounted for in such a way that the details of the original structure can be replaced by their averaged counterparts...

...M. Izadi; D. K. Aidun; P. Marzocca; H. Lee This paper describes an advanced monitoring system for fouling phenomenon in a wide range of tubular heat exchangers such as condensers and intercoolers. First, a mathematical model of fouling resistance in tubular heat exchangers is adapted. The model...

...Hie Chan Kang; Gil Woong Jun The present work was conducted to investigate the air-side pressure drop and heat transfer performance of the louver fin-tube heat exchanger for automobile applications. Fourteen kinds of louver fin geometries with different louver pitches and angles were tested...

...Ivan Catton Optimization of heat exchangers (HE), compact heat exchangers (CHE) and microheat exchangers, by design of their basic structures is the focus of this work. Consistant models are developed to describe transport phenomena in a porous medium that take into account the scales and other...

...A. M. I. Mohamed; R. Hoettiba; A. M. Saif Heat transfer enhancement using corrugated ribbed passages is one of the common enhancement techniques inside heat exchangers. The present study investigated numerically the effect of the corrugation rib angle of attack on the fluid flow and heat transfer...

... in a concentric counterflow heat exchanger. Artificial hard water with calcium carbonate hardness of 250 mg/L was used with velocity ranging from 0.1 m/s to 0.5 m/s and zero blowdown. Fouling resistances decreased by 50–72% for the plasma treated cases compared with the values for no-treatment cases, indicating...

...Pouria Ahmadi; Hassan Hajabdollahi; Ibrahim Dincer In the present work, a thermal modeling is conducted for optimal design of compact heat exchangers in order to minimize cost and entropy generation. In this regard, an ε − NTU method is applied for estimation of the heat exchanger pressure drop...

...M. J. White; G. F. Nellis; S. A. Klein; W. Zhu; Y. Gianchandani Cryogenic and high-temperature systems often require compact heat exchangers with a high resistance to axial conduction in order to control the heat transfer induced by axial temperature differences. One attractive design...

... for heat exchanger applications. We report here the effective convection coefficient and viscosity in microtubes ( D = 0.5 mm ) along with stationary thermal conductivity measurements for nanofluids based on spherical particles ( Al 2 O 3 , ZnO, and CuO) and carbon nanotubes. Sample data include...

...Manish Mishra; P. K. Das; Sunil Sarangi Transient temperature response of crossflow heat exchangers with both fluids unmixed and finite wall capacitance is investigated numerically for sinusoidal excitation provided in hot fluid inlet temperature. The effect of two-dimensional longitudinal...

...Jiangfeng Guo; Lin Cheng; Mingtian Xu In the present work, a multi-objective optimization of heat exchanger thermal design in the framework of the entropy generation minimization is presented. The objectives are to minimize the dimensionless entropy generation rates related to the heat conduction...