I Using Porous Material for Heat Transfer Enhancement in Heat Exchangers: Review

Abstract

The increase in energy cost and energy consumption has required more effective use of energy. The problem of dissipating high heat fluxes has received much attention due to its importance in applications such as heat exchanger. The heat transfer duty of heat exchangers can be improved by heat transfer enhancement techniques. In recent years, Considerable efforts have been made to increase heat transfer rates in heat exchangers by implementing passive enhancement methods that require no direct consumption of external power. On the basis of a theoretical and experimental analysis the conclusion derived was that the best heat transfer enhancement can be reached by the use of porous material as an inexpensive technique to extend the heat transfer area, improve effective thermal conductivity, and mix fluid flow. This paper presents a brief discussion on the application of using porous media to heat exchangers by means of heat transfer enhancement.

Effect of porous material as heat storage medium on fuel consumption in a turbocharged gasoline engine

“…The investigation of Delavar shows a 1–205 MPa strength of porous SiC when the porosity ranges from 9% to 91% with a fracture toughness of 0.3–4.3 MPa m 1/2 . 25 It also maintains heat-resistant stability up to 1600 °C–1700 °C.…”

“…24 For these characteristics, porous material has been used as a heat exchange medium to enhance heat transfer by improving the effective thermal conductivity. 25 Moreover, the strength and heat resistance are important for application. The investigation of Delavar shows a 1–205 MPa strength of porous SiC when the porosity ranges from 9% to 91% with a fracture toughness of 0.3–4.3 MPa m 1/2 .…”

“…Previous studies have shown that porous material such as SiC has the potential to be used as a kind of HSM to store energy. 21–26 However, porous Si-SiC material used as a kind of HSM to recover exhaust gas energy which may improve the turbine performance has not been investigated. In previous studies of this research project, the characteristics of porous Si-SiC material have been investigated such as porosity, substrate surface area, and heat capacity.…”

Heat Transfer of Newtonian Heat-Carrier Under Laminar Flow Through the Flat Porous Channel and Under Symmetric Border Conditions of the First Kind

“…Porous fillers of the flow channels of various purpose heat transfer systems substantially intensify heat transfer [1], which causes their more compact design. However, the quantitative assessment of the possible degree of compactness is impossible without analyzing the phenomena of heat transfer in porous media on the basis of a fundamental approach that uses classical concepts of conjugated heat and mass transfer [2].…”

Numerical study of heat transfer enhancement using perforated dual twisted tape inserts in converging‐diverging tubes

“…They are simpler; thus, these methods are widely used. Rough surfaces, 9 coiled tubes, 10 additives for fluids, [11][12][13] extended surfaces, [14][15][16][17] porous medium, 18 and swirl flow devices 19 are in this category. 20 Finally, compound methods are the combination of active and passive methods.…”