A review on research trends in solar still designs for domestic and industrial applications

An experimental and computational investigation of thermal air flows through perforated pin heat sinks

The cross-flow heat exchanger is a special type of heat exchanger involving the exchange of heat in the case of two fluids flowing in an orthogonal direction. The heat exchanger often comprises of a number of cylinders carrying hot fluid, along with the colder fluid flowing across/over the tubes or cylinders. The system also comprises of additional fins across the tube cross-section along with delta winglets so as to generate the additional turbulence for increasing the rate of heat transfer. The addition of vortex generators helps in promoting system miniaturization. Moreover, the implementation of the passive techniques in cross-flow heat exchangers significantly escalates the pumping power requirement. Thereby, the objective of this paper is to carry out a review on the recent developments and their potential candidature for improving the thermal performance of heat exchanger. The latest state-of-the-art developments are deeply discussed with its evaluating parameters and some recommendations are made for further investigation in this area.

Recent advancement in heat transfer and fluid flow characteristics in cross flow heat exchangers

Performance, limits and economic perspectives for passive cooling of High Concentrator Photovoltaics

Heat transfer and flow characteristics of spiral fin-and-tube heat exchangers: A review

This review presents when and how extended surface with heat exchanger have been used over the last 15 years in the field of heat transfer. They have been used in this field over a century, but their utilization increases more recent. For past 1 decade, most of the industries required high performance heat transfer components with less weight, volume and cost. The reported investigations are categorized into five major groups as follows: annular fins, elliptical fins and elliptical tube, pin fins, longitudinal fins and recent trend fins by experimental, numerical and analytical methods. Around 70 published articles related to fins with heat exchanger are briefly reviewed. This information is useful for future use of the different shapes of extended surface based on the space availability and cost.

Review of utilization of extended surfaces in heat transfer problems

Fin Effectiveness Optimization of Elliptical Annular Fins by Genetic Algorithm

– This paper presents the total heat transfer rate by Elliptical Annular Fin (EAF) and Circular Annular Fin (CAF) by experimental set-up, validated CFD analysis and optimization of EAF using Genetic Algorithm (GA). The experimental result of EAF shows that, the surface temperature of EAF goes on decreasing gradually along with the projected surface area in the direction of the major axis. The STE decreases with the Biot number (Bi) and Shape factor (SF). The rate of reduction of STE with increasing Bi is higher for Bi < 0.013. The experimental results are validated with CFD result. The deviation is within acceptable range for surface temperature, STE and fin effectiveness are 5-8%. The GA developed is validated with the experimental result. It is observed that, the fin effectiveness is higher when the minor axis touches the circumference of the CT, and for smaller values of SF and smaller values of the radius of the CT. This optimization method is universal and may be used for optimization of EAF under specified volume.

Experimental, numerical analysis and optimization of elliptical annular fins under free convection (research note)

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Review of utilization of extended surfaces in heat transfer problems

Fin Effectiveness Optimization of Elliptical Annular Fins by Genetic Algorithm

Experimental, numerical analysis and optimization of elliptical annular fins under free convection (research note)