Journal
JOURNAL OF ENERGY STORAGE
Volume 43, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2021.103243
Keywords
Graphene nanoparticles; PCM; Triangular obstacle; Rectangular fin
Categories
Funding
- Taif University Researchers Sup-porting Project, Taif University, Taif, Saudi Arabia [TURSP-2020/121]
Ask authors/readers for more resources
This study investigates the impact of graphene nanoparticles on the melting and freezing time of Calcium Chloride Hexahydrate-based Phase Change Material, using simulations and observing that an increase in fin length results in reduced melting and freezing times. The addition of fins also leads to a higher proportion of molten or frozen material in specific time frames, indicating an improvement in thermal performance.
In the present paper, the effect of graphene nanoparticles (NPs) in Calcium Chloride Hexahydrate (CaCl2 center dot 6H(2)O)-based Phase Change Material (PCM) on its melting and freezing time is investigated. The simulations are performed on a novel geometry involving a two-dimensional tube with a triangular obstacle. In PCM charging mode, the internal obstacle is hot and the outer walls are cold. In the PCM discharge mode, the internal obstacle is cold and the outer walls are assumed to be hot. A number of rectangular-shaped fins with a length of 0.5 to 1.5 mm are placed on the obstacle. To solve the equations and determine the melting and freezing fronts, the finite element method is used by employing COMSOL Multiphysics software. The enthalpy method is employed to simulate the melting front. The variable is the length of the fins at different solution times and its effect on the melting and freezing times as well as the Nusselt number is studied. The results demonstrate that an increment in the length of the fins reduces the melting time of PCM (charge time) and the freezing time of PCM (discharge time). An enhancement in the fin length causes a higher percentage of molten material in the charge mode and a higher percentage of frozen material in the discharge mode at a specific time from the starting time of solution. The addition of a 1.5-mm fin to the obstacle increases the solid PCM by 26% in the PCM discharging mode and 56% of the molten material in the PCM charging mode at 400 ss.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available