Journal of Mechanical Engineering and Modern Technology
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HELICAL HEAT EXCHANGER USING PHASE CHANGE MATERIALS WITH EXPANDED GRAPHITE PARTICLES
Author :
Hamidreza Ghasemi Bahraseman, Alvah Bickham, Matthew Bonilla, Justin Hageman, Omar Huerta, Robert Mann and Marlon Quintanilla
Corresponding Author:
Hamidreza Ghasemi Bahraseman
Email
hghasemibahraseman@sdsu.edu
Section :
Research Paper
Country :
United States
Keywords :
Heat Exchanger, Phase Change Materials, Expanded Graphite Particles
Abstract :
This paper focuses and investigates the application of nanoparticle immersion in a phase change material for latent heat energy storage. In a real-world scenario, a helical pipe coil would be wound through an insulated steel tank filled with the composite PCM; heated or cooled water would be pumped to inject or extract heat from the PCM as needed. For simplification, simulation was done using a helical heating element instead. The base of the composite phase change material (PCM) was paraffin wax, and the nano-particle material immersed in the base was expanded graphite. Five total cases were examined with different percentages of expanded graphite in solution, with the first case having no graphite. Simulation and analysis was done using COMSOL Multiphysics 4.3a. Parameters examined were the average temperature of the body, the time to reach the coil temperature, the melted fraction of the PCM, and the time to reach complete melting. The generated data from the selected criteria assist in visualization of the effect of an increased percentage of expanded graphite in heat storage applications.
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