利用LNG冷能温差发电的研究  

Study on Thermoelectric Power Generation of LNG Cold Energy

作　　者：赵玉龙[1] 王世学[1] 李彦哲[1] 朱强[1] 

机构地区：[1]中低温热能高效利用教育部重点实验室,天津大学,天津300072

出　　处：《工程热物理学报》2016年第9期2006-2011,共6页Journal of Engineering Thermophysics

基　　金：中国博士后科学基金资助项目(No.2015M580200);科技部国际合作项目(No.2013DFG60080)

摘　　要：LNG气化过程释放出大量的冷能,传统气化方式直接将冷能释放到环境中,造成能源的浪费。本文将半导体温差发电技术应用到LNG空温式气化器当中,设计了带温差发电装置的新型翅片管,并进行了建模与计算。结果表明,新型翅片管比传统翅片管管外壁面温度升高了15.9-23.7 K,有利于抑制气化器的表面结霜问题,但完成相同气化过程所需换热管的长度增加了49%;同时发现液相区、两相区发电性能相对较好,发电效率达到0.9%以上,发电功率密度达到8.0 W/m以上。Plenty of cold energy will be released during gasification process of LNG.The traditional gasification method release the energy directly to environment which leads to the waste of energy.The semiconductor thermoelectric generation technology was applied to LNG air temperature-type vaporizer in this paper.The designed new finned tube with thermoelectric generator was modeled and calculated.The results showed that the outside wall temperature of new finned tube was 15.9-23.7 K higher than original finned tube that was beneficial to the inhibition of frosting problem in vaporizer,however,the needed tube length increased by 49%in completing the same gasification process.The liquid region and gas-liquid region have relatively high generation efficiency of about 0.9%and power density of 8.0 W/m.

关 键 词：LNG 冷能利用 温差发电 翅片管 

分 类 号：TN302[电子电信—物理电子学]