基于LNG冷能利用的半导体温差发电性能试验研究
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摘要:摘要为了研究半导体温差发电在应用于LNG相关传感器监测所需供电方面的潜力,首先在半导体温差发电基本模型的基础上计算出不同热端温度下的最大发电功率和效率曲线,结果显示当热端温度低于220 K时几乎没有功率输出。然后基于天然气汽化与温差发电相结合的场景,设计了一..
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摘要为了研究半导体温差发电在应用于LNG相关传感器监测所需供电方面的潜力,首先在半导体温差发电基本模型的基础上计算出不同热端温度下的最大发电功率和效率曲线,结果显示当热端温度低于220 K时几乎没有功率输出。然后基于天然气汽化与温差发电相结合的场景,设计了一种用于LNG冷能利用的换热器结构,仿真结果显示:壁面温度为140 K时换热器的换热能力为6.608 kW。最后,为了探究半导体温差发电在低温下的发电性能,基于所设计的换热器搭建了一套用于冷能利用的半导体温差试验系统,试验结果显示半导体温差发电系统最大发电量可达到9.33 W。In order to study the potential of semiconductor thermoelectric generator in the power supply required for monitoring LNG related sensors,curves of maximum power generation and efficiency at different hot-side temperatures were calculated based on basic model of semicon-ductor thermoelectric power generation.Results show that nearly no power output is approached when the hot-side temperature is below 220 K.Then,based on combination of natural gas vapori-zation and thermoelectric power generation,a heat exchanger structure for LNG cold energy utiliza-tion is designed.Simulation results show that heat transfer capacity of the heat exchanger is 6.608 kW at a given wall temperature of 140 K.Finally,based on the designed heat exchanger,a semi-conductor thermoelectric generator’s test system for cold energy utilization is built,and the per-formance of semiconductor thermoelectric generator at low temperature is studied.The test results show that the maximum power generation of the semiconductor thermoelectric generator system can be up to 9.33 W. 基金车用燃料电池系统一体化电磁兼容测试技术开发(2020YFB1506004)。 关键词LNG 冷能利用 换热器 半导体温差发电LNG cold energy utilization heat exchanger semiconductor thermoelectric gen-erator |
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