Radiation heat transfer in high porosity open-cell metal foams for cryogenic applications

Cooling capacity of high porosity open-cell metal foams as passive cryogenic radiators

“…If the metal foam is at temperature , Eq. (1) defines its capacity to dissipate the radiative energy to an enclosure at temperature [33].…”

“…It is evident from some of these works [45,46,52], that the incident thermal radiation is able to pass through the metal foam due to the open pores but is intercepted by the opaque metallic struts. This results in metal foam offering higher radiative interactive surface area in contrast to a solid surface [33].…”

“…Open literature still lacks comprehensive research in radiation heat transfer study of open-cell metal foams [44]. Nevertheless, few research groups [33,[45][46][47][48][49][50][51][52] have been actively involved in radiative characterization of metal foams. It is evident from some of these works [45,46,52], that the incident thermal radiation is able to pass through the metal foam due to the open pores but is intercepted by the opaque metallic struts.…”

“…Riti et al [16] have stated enhancement in surface emissivity as a consequence of the structure geometrical effects. Another type of cellular solids that might possibly serve as radiator extended heat transfer surfaces are high porosity open-cell metal foams [33,34]. Open porous metal foams are commercially characterized by two parameters, namely, porosity and pore density.…”

High-Porosity Metal Foams: Potentials, Applications, and Formulations

“…High-Porosity Metal Foams: Potentials, Applications, and Formulations http://dx.doi.org/10.5772/intechopen.704518. They have the potential to be used for radiation shielding [9].…”