可同时发电的余热回收系统与试验研究
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摘要
为了将余热回收与温差发电技术结合起来,建立了一套热回收系统,该系统在回收热的同时还可以发电。建立了相应试验系统,分别采用3组不同流量的冷却水对发电片冷端进行降温,同时收集热量。得出了回收热量和电量与余热温度及水流量之间的关系式,调节冷却水流量可以调节电能与热能回收的比例。研究表明:应尽量使温差发电片冷热两端温差在大于30℃的工况下运行,此时电量和热量回收效率均较高。
To combine waste heat recovery with thermoelectric power generation,a heat recovery system has been established in this paper to recover heat and generate electricity at the same time.A corresponding testing system has been established,and using cooling water with 3 different flow rates to cool the cold end of thermoelectric elements and collect heat.The relationships among heat recovery and electric quantity and the temperature of waste heat and water flow rate are obtained.The ratio of electric energy and heat energy recovery can be adjusted through the cooling water flow rate.The study shows that when the temperature difference between the two ends of the thermoelectric power generation chip is more than 30 ℃,the electric quantity and heat recovery efficiency reach their maxima.
To combine waste heat recovery with thermoelectric power generation,a heat recovery system has been established in this paper to recover heat and generate electricity at the same time.A corresponding testing system has been established,and using cooling water with 3 different flow rates to cool the cold end of thermoelectric elements and collect heat.The relationships among heat recovery and electric quantity and the temperature of waste heat and water flow rate are obtained.The ratio of electric energy and heat energy recovery can be adjusted through the cooling water flow rate.The study shows that when the temperature difference between the two ends of the thermoelectric power generation chip is more than 30 ℃,the electric quantity and heat recovery efficiency reach their maxima.
引文
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[2] 白秀平,王娟,安旭东.火电厂锅炉余热利用技术[J].干燥技术与设备,2012,10(3):40.BAI Xiu-ping,WANG Juan,AN Xu-dong.Utilization technology of boiler waste heat in thermal power plant [J].Drying Technology and Equipment,2012,10(3):40.
[3] 王传文,张生凯.降低锅炉排烟热损失的措施[J].莱钢科技,2009.WANG Chuan-wen,ZHANG Sheng-kai.Measures to reduce the heat loss of boiler exhaust gas [J].Laigang Technology,2009.
[4] 高敏,张景韶,ROWE D M.温差电转换及其应用[M].北京:兵器工业出版社,1996.GAO Min,ZHANG Jing-shao,ROWE D M.Thermoelectric conversion and its application [M].Beijing:Ordnance Industry Press,1996.
[5] 栾伟玲,涂善东.温差电技术的研究进展[J].科学通报,2004,49(11):1011-1019.LUAN Wei-ling,TU Shan-dong.Advances in thermoelectric technology [J].Scientific Bulletin,2004,49(11):1011-1019.
[6] 袁晓红.汽车发动机尾气余热温差发电装置热电转换技术研究[D].武汉:武汉理工大学,2012.YUAN Xiao-hong.Study on thermoelectric conversion technology of automotive engine exhaust waste heat difference generator [D].Wuhan:Wuhan University of Technology,2012.
[7] 徐立珍,李彦,杨知,等.汽车尾气温差发电的实验研究[J].清华大学学报(自然科学版),2010,50(2):287-289.XU Li-zhen,LI Yan,YANG Zhi,et al.Experimental study on thermoelectric generation of automobile exhaust gas[J].Journal of Tsinghua University (Natural Science Edition),2010,50(2):287-289.
[8] MENG Jing-hui,WANG Xiao-dong,CHEN Wei-hsin.Performance investigation and design optimization of a thermoelectric generator applied in automobile exhaust waste heat recovery[J].Energy Conversion and Management,2016(120):71-80.
[9] MALA R,PRASAD R,VIJAY VK,et al.The design,development and performance evaluation of thermoelectric generator (TEG) integrated forced draft biomass cookstove[J].Procedia Computer Science,2015,52:723-729.
[10] 富春光.锅炉烟气余热回收技术的应用探讨[J].热电技术,2012(2):5-6.FU Chun-guang.Discussion on the application of waste heat recovery technology of boiler flue gas [J].Thermoelectric Technology,2012(2):5-6.
[11] 赵之军,冯伟忠,张玲,等.电站锅炉排烟余热回收的理论分析与工程实践[J].动力工程,2009,29(11):995-997.ZHAO Zhi-jun,FENG Wei-zhong,ZHANG Ling,et al.Theoretical analysis and engineering practice of waste heat recovery from boiler exhaust gas in power plant [J].Power Engineering,2009,29(11):995-997.
[12] 许志建,徐行.塞贝克效应与温差发电[J].现代物理知识,2004,16(1):41-42.XU Zhi-jian,XU Xing.Seebeck effect and thermoelectric power generation [J].Knowledge of Modern Physics,2004,16(1):41-42.
[13] 索开南,张维连,赵嘉鹏,等.硅锗合金Seebeck系数影响因素的研究[J].人工晶体学报,2007,36(3):579-582.SUO Kai-nan,ZHANG Wei-lian,ZHAO Jia-peng,et al.Study on the influence factors of Seebeck coefficient of SiGe alloy[J].Journal of Artificial Crystallography,2007,36(3):579-582.