Investigation of numerical phase transition of nano-enhanced SiC/paraffin wax PCM in solar-assisted water desalination system

Fayaz, Hussain and Ramesh, S. and Afzal, Asif and Agbulut, Ümit and Khan, Sher Afghan and Asif, Mohammed and Raja, Vijayanandh and Linul, Emanoil (2024) Investigation of numerical phase transition of nano-enhanced SiC/paraffin wax PCM in solar-assisted water desalination system. Thermal Science and Engineering Progress, 50. pp. 1-15. E-ISSN 2451-9049

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Abstract

Adding nanoparticles in phase change material (PCM) is a new trend for enhancing their thermal energy-storing ability as well as thermal conductivity. From this point of view, a numerical study is carried out to examine the addition of silicon carbide nanoparticles in paraffin wax PCM, used as heat energy storing material in a semicylindrical solar water desalination system. The PCM temperature is maintained at 52 ◦C and the semicylindrical tubular section has a wall temperature of 85 ◦C. The top plane section of the tubular solar collector is made up of graphite material. A semi-circular cross-section is selected for numerical analysis. A finite volume solver is used for solving thermal and fluid flow governing equations. A pressure staggering option algorithm is applied for pressure–velocity coupling. The temporal parameters like temperature, velocity contours, melting fraction, enthalpy, and entropy of nano silicon embedded paraffin wax PCM are widely discussed. The results clearly show that the phase transition of solid PCM to fluid PCM is greatly influenced by nanoparticle addition and enhances the rate of heat transfer. Initially for the first 60 min the melting fraction and temperature of PCM remain uniform as the time step increases above 60 min the behavior of PCM changes abruptly which indicates the random distribution of nanoparticles within the PCM. A critical time and temperature limit exists for nanoparticles-based PCM beyond which, the thermal efficiency of the solar water desalination system gets influenced.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Solar water desalination. SiC/paraffin wax PCM, Enthalpy, Entropy, FVM
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Dr. Sher Afghan Khan
Date Deposited:	02 Apr 2024 15:02
Last Modified:	02 Apr 2024 15:31
URI:	http://irep.iium.edu.my/id/eprint/111646

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