Experimental study of thermal conductivity and phase change performance of nanofluids PCMs

Abstract

A new sort of nanofluids phase change materials (PCMs) is developed by suspending small amount of TiO 2 nanoparticles in saturated BaCl 2 aqueous solution. The resulting nanofluids PCMs possess remarkably high thermal conductivities compared to the base material. Cool storage/supply experiments conducted in a small apparatus have shown the excellent phase change performance of the nanofluids PCMs. The cool storage/supply rate and the cool storage/supply capacity all increase greatly those that of BaCl 2 aqueous solution without added nanoparticles. The higher thermal performances of nanofluids PCMs indicate that they have a potential for substituting conventional PCMs in cool storage applications.

Thermal conductivity enhancement of lauric acid phase change nanocomposite with graphene nanoplatelets

“…The present thermal conductivity is higher by a factor of ~2.3 compared to the pristine lauric acid. The present thermal conductivity enhancement is superior to the results of carbon nanofibers [14], MWCNT based phase change nanocomposites [15 -17], silver nanowires [13] and nanoparticles [8][9][10][11][12]. [31,32].…”

“…Recently this has led to increasing interests in the use of high conductive nano inclusions to enhance the thermal conductivity of such PCMs [7]. High conductive nanoparticles such as Ni, Al 2 O 3 , TiO 2 [8][9][10][11][12], silver nanowires [13] or carbon nanoadditives such as nanofibers [14], carbon nanotubes (CNT)…”

Energy Adaptive Glass Matter

“…The resulting mixture is referred to as nanofluids that possesses substantially larger thermal conductivity compared to that of base fluids itself, was researched by Yu-Dong et al [27]. Nanofluidics of active heat absorbing fluids within microvascular networks could give optimization of network efficiency for surface cooling and temperature regulation.…”

Solidification of nano-enhanced phase change material (NEPCM) in a wavy cavity

“…Their results suggested that the phase change temperature is independent of the mass fraction of nanoparticles. Moreover, Liu et al [21], they showed that nanoparticles suspended in the nanofluids PCMs function not only enhancing heat transfer, but also as a nucleating agent reducing supercooling of the suspensions. Considering these experimental results, the assumption of negligible supercooling in NEPCM seems to be logical.…”