New phase change material emulsions (PCMEs) were developed and characterized as possible storage and heat transfer media for low-temperature thermal applications. RT21HC commercial paraffin (Tm ~21ºC) was investigated both in water and in an ethylene glycol+water mixture. A solvent-assisted emulsification method was used to prepare PCMEs. Paraffin droplet sizes were measured by DLS and emulsion stability evaluated during storage. Melting temperatures and latent heats were experimentally determined, and sub-cooling of up to 11 ºC were observed. Although thermal conductivity reduces by 9% for 10% paraffin mass concentration, enhancements in energy storage capacity overcome 20% for that same loading.
A preliminary study on Erythritol-based nanofluids for potential heat transfer and storage applications
F Agresti;L Fedele;S Bobbo;S Rossi;S Barison
2019
Abstract
New phase change material emulsions (PCMEs) were developed and characterized as possible storage and heat transfer media for low-temperature thermal applications. RT21HC commercial paraffin (Tm ~21ºC) was investigated both in water and in an ethylene glycol+water mixture. A solvent-assisted emulsification method was used to prepare PCMEs. Paraffin droplet sizes were measured by DLS and emulsion stability evaluated during storage. Melting temperatures and latent heats were experimentally determined, and sub-cooling of up to 11 ºC were observed. Although thermal conductivity reduces by 9% for 10% paraffin mass concentration, enhancements in energy storage capacity overcome 20% for that same loading.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
