低溫?zé)嵩聪碌臒犭姲l(fā)電參數(shù)的影響分析
[Abstract]:In today's society, all countries are committed to seeking efficient, non-polluting methods of secondary energy utilization and energy recovery, in order to solve the energy problem and alleviate the environmental problems at the same time. Thermoelectric power generation technology directly converts heat energy into electric energy. With its many advantages, people see its great potential in the field of waste heat recovery and utilization. In order to better apply this technology to industry and civil, this paper studies the thermoelectric power generation technology from two aspects: theory and experiment. In this paper, the application of thermoelectric power generation technology is studied and analyzed theoretically. Based on the basic effect of thermoelectricity, first of all, the contact resistance is included in the actual working process, starting with the theoretical situation in the process of thermoelectric power generation. The thermoelectric coupling model of the actual thermoelectric generator is established based on the thermal resistance and ceramic chip, and the relationship between the performance parameters of the actual process and other parameters is deduced based on the model analysis, and the thermoelectric coupling model of the actual thermoelectric generator is established, based on which the relationship between the performance parameters and other parameters of the actual process is derived. The correlation formula is obtained. Then, according to the correlation formula of performance parameters obtained from the actual model, the different parameters are changed separately, and the performance parameters of thermoelectric power generation are calculated and analyzed numerically. The influence of internal resistance, load resistance, thermal conductivity of hot and cold end, thermal conductivity of thermoelectric material, temperature of cold and hot end and Seebeck coefficient on output power and efficiency of thermoelectric conversion were obtained. In this paper, the application of thermoelectric power generation technology has been tested from the experimental aspects: a thermoelectricity module thermoelectricity performance test platform is built, the research and analysis of the thermoelectricity module cold and hot end temperature difference, circuit load resistance on the performance of the influence. The open circuit voltage of a single thermoelectric module, its variation with the temperature at the cold and hot ends and the output power with the load resistance under three different working conditions are tested. Get the actual situation of a single module of power generation. Through the research of thermoelectric power generation, the correlation formula of thermoelectric power generation performance parameters and the influence of each parameter in the correlation formula on the thermoelectric power generation performance are obtained theoretically in this paper, which is close to the actual situation, and the magnitude of the influence of each parameter in the correlation formula on the thermoelectric power generation performance is obtained. It also has some guiding significance for the research and application of thermoelectric module.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TM611
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