Development of flare gas generation unit based on thermal energy conversion

Mohd Yurizulkifli, Muhammad Irfan Hazim (2020) Development of flare gas generation unit based on thermal energy conversion. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Recently, an increasing concern of environmental issues of emissions, in particular global warming and the limitations of energy resources resulted an extensive research into novel technologies of generating electrical power. Thermoelectric power generators emerged as a promising alternative green technology due to their distinct advantages. Thermoelectric power generation offer a potential application in the direct conversion of waste-heat energy into electrical power where it is unnecessary to consider the cost of the thermal energy input. The application of this alternative green technology in converting waste-heat energy directly into electrical power improve the overall efficiencies of energy conversion systems. In this research, a background on the basic concepts of thermoelectric power generation is presented and recent patents of thermoelectric power generation with their important and relevant applications to waste-heat energy are reviewed and discussed. In the actual operation, the electrical connected thermoelectric modules are operated under temperature mismatch conditions and decreased the power output causes due to the inhomogeneous temperature gradient distribution on heat exchanger surface. In this study, an individual module test system and a test bench is carried out to test and analyze the impact of thermal imbalance on the output electrical power at module and system level. Variability of the temperature difference and clamping pressure are also tested in the individual module measurement. The system level experimental results clearly describe the phenomenon of thermoelectric generator's decreased power output under mismatched temperature condition and limited working temperature. This situation is improved with thermal insulation on the modules and proved to be effective. This residual thermal energy can be converted into usable electricity using thermoelectric generator (TEG), which are manufactured cells with semiconductor materials employing the Seebeck effect. When recovering the waste heat in the exhaust ducts using TEG, the efficiency of electrical machines is increased because the same amount of fuel input generates more power or less intake of fuel has the same amount of the generated electric energy and thus reduce air pollution.

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