Thermal performance enhancement of latent heat storage system using wavy fins and change in tube geometry
Subject Areas : Journal of New Applied and Computational Findings in Mechanical Systems
Rahman
Hamid
1
(Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran )
zahra
mehrdoost
2
(Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran )
Keywords: Phase change material, Latent heat energy storage, Wavy fin, Heat transfer,
Abstract :
In this work, thermal performance improvement of the latent heat energy storage system using wavy fins and change in the heat transfer fluid tube geometry is numerically investigated. The investigated system is a shell and tube heat exchanger and RT35 paraffin is used as the phase change material. With the constant total cross-section area of the tube and fins as well as the volume of the phase change material, the effect of heat transfer fluid tube shape and the designed fin on the melting process of the phase change material is investigated. Numerical simulation results show that wavy fins accelerate the phase change process compared to conventional straight fins. The complete melting time of the phase change material is reduced by 9.33% compared to the straight fin. Changing the geometry of the heat transfer fluid tube from the circle to the petal shape is proposed to further improve the thermal performance of the latent heat energy storage system. The melting rate of the phase change material increases with the increase in the number of petals. The complete melting time for the tube with seven petals is reduced by 66.7% compared to the circular tube with wavy fins and 69.8% compared to the base case with straight fins.
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