首页|Method for estimating change over time of the amount of heat stored in a semi-infinite phase-change material with a broad phase-change-temperature range
Method for estimating change over time of the amount of heat stored in a semi-infinite phase-change material with a broad phase-change-temperature range
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NSTL
Elsevier
In this paper, equations are proposed that can predict the change over time of the amount of heat stored in a semi-infinite phase-change material (PCM) that has a broad phase-change-temperature range and apparent specific heat that can be approximated by a Gaussian distribution. The proposed equations can be applied under the condition that the initial temperature distribution is uniform below T-c (;)- 3 sigma and the surface temperature is maintained warmer than T-c + 3 sigma. Here, T-c is the central temperature of the apparent specific heat when the apparent specific heat is approximated by a Gaussian distribution and sigma is the standard deviation. The change over time of the amount of sensible heat in the semi-infinite PCM is approximately expressed using equations obtained by integrating the temperature distributions. In addition, the distribution of the latent heat is approximated from the temperature distribution, and the change over time of the amount of latent heat in the semi-infinite PCM is derived by integrating the distribution of the latent heat. Therefore, the change over time of the total amount of heat in a semi-infinite PCM is expressed as the sum of the change over time of the amounts of sensible heat and latent heat in the semi-infinite PCM.
Phase-change materialBroad phase-change-temperature rangeApparent specific heatTemperature distributionLatent heat distributionTHERMAL STORAGESYSTEMS
NSTL
Elsevier
