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Latent heat
About: Latent heat is a research topic. Over the lifetime, 13503 publications have been published within this topic receiving 302811 citations.
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TL;DR: The results showed that the cooling rate of the PCM vests tested is positively correlated with the temperature gradient between the thermal manikin and the melting temperature, and the required temperature gradient, PCM mass and covering area should be taken into account when choosing personal PCM cooling equipment.
Abstract: Phase change material (PCM) absorbs or releases latent heat when it changes phases, making thermal-regulated clothing possible. The objective of this study was to quantify the relationships between PCM cooling rate and temperature gradient, mass, and covering area on a thermal manikin in a climatic chamber. Three melting temperatures (24, 28, 32 °C) of the PCMs, different mass, covering areas, and two manikin temperatures (34 and 38 °C) were used. The results showed that the cooling rate of the PCM vests tested is positively correlated with the temperature gradient between the thermal manikin and the melting temperature of the PCMs. The required temperature gradient is suggested to be greater than 6 °C when PCM vests are used in hot climates. With the same temperature gradient, the cooling rate is mainly determined by the covering area. The duration of the cooling effect is dependent on PCM mass and the latent heat
116 citations
TL;DR: Schmidt and Haberland as discussed by the authors studied the solid to liquid transition of clusters, mainly from an experimental point of view, and showed that the melting temperatures are about 30% less than the bulk value and fluctuate strongly, one additional atom can change it by ±10 K.
115 citations
TL;DR: In this paper, the authors continuously measured sapflow and within the canopy air temperature of Tilia cordata trees along with meteorological variables at two different street canyons in Munich, Germany over the summer of 2015.
115 citations
TL;DR: In this paper, a two-dimensional finite volume based numerical model along with enthalpy-porosity technique is employed to simulate the phase change of storage media during the discharging mode.
115 citations
TL;DR: In this paper, the latent heat, L m, sensible heat Q sens, and ability of the prepared PCMs to store and release thermal energy were investigated using specific home-made equipment based on the transient guarded hot plane method (TGHPT).
115 citations