This study evaluates the concept of developing a nondeform phase-change energy storage material possessing higher thermal conductivity and energy storage density through a pressure compaction process. The theoretical and experimental investigations have shown that the technique is able to reduce porosity and increase conductivity and energy storage density of a composite material. Even though there was some measure of plastoelasticity due to decompression, the average porosity was reduced from 62 to 23.8% at a relatively low compaction pressure of 2.8 MPa without any structural damage to the tested sample. The mean energy storage density increased by 97%, and the effective thermal conductivity also increased by 25 times, despite a 10% reduction in its latent heat capacity. There is, however, the need for further development toward minimizing the effect of decompression and achieving stronger energy storage tablets at a relatively low compaction force.
Evaluation of Thermal Energy Dynamics in a Compacted High-Conductivity Phase-Change Material
Journal of Thermophysics and Heat Transfer ; 29 , 2 ; 291-296
2015-01-28
6 pages
Article (Journal)
Electronic Resource
English
Hydraulic Conductivity (Permeability) of Laboratory-Compacted Asphalt Mixtures
Online Contents | 2001
|