Abstract
In this paper, a phase change plate composed of shell-and-tube latent heat storage units was investigated for air conditioning application. A mathematic model of one shell-and-tube unit was built in COMSOL software, which was then validated with experimental results. Numerical and theoretical analysis results show that the improvement of temperature uniformity and better heat transfer performances are highly related, which can be improved with larger void fraction and smaller fluid channel diameter. Optimal void fraction and fluid channel diameter were proposed for the longest effective cooling time of heat transfer fluid, which is influenced by the critical temperature of outlet air. Design parameters of phase change plate were suggested to have the fluid channel diameter less than 0.5 cm and void fraction between 0.5 and 0.7. Then, optimal phase change temperature was suggested to secure relatively long effective cooling time in a large range of air inlet temperature.
Published Version
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