Phys.org September 28, 2020
A team of researchers in South Korea propose Phase Change Material (PCM) wall device using bubble injection method for the application of PCM in building envelopes. The density difference between PCM and bubbles causes the upward movement of the bubbles and flow in the liquid PCM destroying temperature stratification in the PCM and heat penetration across the PCM is reduced. With the application of the bubble injection method, 11% more latent heat energy was stored in the PCM, 28% less heat penetrated across the PCM wall and the average flow rate inside the liquid PCM with bubble injection was 19 times higher. Based on these results, the bubble injection method was confirmed to improve the performance of insulation and energy storage of PCM walls…read more. TECHNICAL ARTICLE
(a) PCM wall cross section (b) temperature measurement position. Credit: Korea Institute of Science and Technology(KIST)