Study on preparation and thermal properties of sodium nitrate/silica composite as shape-stabilized phase change material

Form‐stable Na 2 SO 4 ·10H 2 O‐Na 2 HPO 4 ·12H 2 O eutectic/hydrophilic fumed silica composite phase change material with low supercooling and low thermal conductivity for indoor thermal comfort improvement

“…To handle this issue, shape‐stable composite PCMs (CPCMs) comprising PCMs and supporting carriers (porous materials) have been developed . Although the PCMs become liquid, the CPCMs still remain solid without leaking, thus favoring the practicability of PCMs . In the latest years, embedding PCMs directly into inorganic porous materials as the carriers has motivated extensive interest, because this method enjoys numerous acknowledged superiorities including competitive price, shape stability, excellent mechanical strength, and extremely simple preparation technology .…”

“…31 Although the PCMs become liquid, the CPCMs still remain solid without leaking, thus favoring the practicability of PCMs. 32 In the latest years, embedding PCMs directly into inorganic porous materials as the carriers has motivated extensive interest, because this method enjoys numerous acknowledged superiorities including competitive price, shape stability, excellent mechanical strength, and extremely simple preparation technology. 33,34 Among all inorganic porous materials, expanded graphite and fumed silica possess the merits of high porosity and large specific surface area and are lightweight, making them the preferred carriers for the fabrication of CPCMs.…”

Expanded Vermiculite: A Promising Natural Encapsulation Material of LiNO3, NaNO3, and KNO3 Phase Change Materials for Medium‐Temperature Thermal Energy Storage

“…EG can effectively improve the thermo‐physical properties of nitrates and their eutectics PCMs, especially the thermal conductivity. Previous studies focused on glass, silica, SiC ceramic, expanded perlite, and other encapsulation materials . Guo et al prepared NaNO 3 /SiO 2 fs‐CPCM by sol‐gel procedure and the maximum encapsulation capacity was 60 wt%.…”

“…Previous studies focused on glass, silica, SiC ceramic, expanded perlite, and other encapsulation materials . Guo et al prepared NaNO 3 /SiO 2 fs‐CPCM by sol‐gel procedure and the maximum encapsulation capacity was 60 wt%. The melting and solidification latent heats were determined to be 108 and 110 J g −1 , respectively.…”

Form-stable LiNO 3 –NaNO 3 –KNO 3 –Ca(NO 3 ) 2 /calcium silicate composite phase change material (PCM) for mid-low temperature thermal energy storage

“…World primary energy consumption today is approximately 550 Exajoules, and approximately 80% of this total is provided by burning fossil fuels [1]. Burning fossil fuels emits a large amount of waste heat due to economic and thermodynamic constrains and mismanagements.…”