Characterization of heat transfer phenomenon of the electrode with plate over the tip of electrode for plasma generation

Supparmaniam, Kugaishan (2018) Characterization of heat transfer phenomenon of the electrode with plate over the tip of electrode for plasma generation. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Recently a new technology was developed to produce hydrogen which known as in liquid plasma. In this technology, the plasma is formed in liquid. Plasma is a state of matter that exist after gas is supplied to sufficient amount of heat. This technology works from the electrical energy. From the electrical energy source heat is generated at the electrode that was immersed in liquid. The liquid used are normally hydrocarbon, water and waste oil. As the heat is focused at the tip of the electrode, plasma is generated on the tip of the electrode. Then radical species is produced. After this radical species react with liquid few gases are formed such as hydrogen, carbon monoxide and carbon dioxide. This technology also can work in commercial oven. In this technology the use of waste oil is highly recommended as it is disposed and at the same time it is used to produce hydrogen gas. However, this technology consumes a lot energy. So, further studies need to be done regarding in liquid plasma technology to enhance the efficiency of heat transfer. In this project the type of electrode, addition of plate over the tip of electrode and type of liquid used for in liquid plasma was studied. This was done by simulating in the Computational Fluid Dynamic. The setup was changed for two models. The results were compared for the highest heat gain by comparing the maximum temperature over the electrode. If the temperature over the electrode tip is high, the liquid will change into gas and the high temperature will ease the formation of plasma. From the result, the maximum temperature over the tip of electrode was obtained for in liquid plasma when tungsten was used as electrode, plate was not added over the tip of electrode and dodecane was used as a liquid for in liquid plasma. The high maximum temperature indicates that the in-liquid plasma requires less energy to initiate plasma

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