文摘太阳能烟囱(solar chimney,SC)是热压驱动室内自然通风的重要手段之一,提高其太阳能利用率和通风性能具有重要意义。结合离散热源强化烟囱通风理念,提出了一种外置式太阳能热电烟囱并探讨了烟囱通风特性及其对室内环境影响。首先基于流动传热与热电能量转换理论,建立了太阳能热电烟囱二维非稳态模型。其次分析了不同热电发电机(thermoelectric generator,TEG)位置,如烟囱出口处(TEG-outlet),烟囱中部处(TEG-mid),烟囱入口处(TEG-inlet),烟囱通风性能与室内环境流动分布规律,并进一步讨论了热电发电性能。最后比较了外置式离散热电烟囱(solar chimney integrated with TEG,TEG-SC)与传统烟囱的各项通风、发电性能的差异,阐明TEG-SC的优势。结果表明:随着光照强度增大,热电放置在入口处相对于放置在出口处和中部处下的出口速度和每小时换气率量(air changes per hour,ACH)最大,此时,每个位置TEG的发电功率差别不大,但是随着光照强度的增大,热电放置出口处的发电功率会逐渐增大。与此同时,TEG-SC的出口速度相对于单个TEG较大,总的发电功率增加近3倍,并且TEG-SC相对于传统SC的通风量有所提高,其中出口速度相对于传统SC平均提高了18.5%。所提出的外置式太阳能热电烟囱系统将为强化室内自然通风和提高太阳能利用率提供坚实的理论基础和技术指导。
基金supported by the National Natural Science Foundation of China(21067004,21263005)the Young Science and Technology Project of Jiangxi Province Natural Science Foundation China(20133BAB21003)+3 种基金The Landing Project of Science and Technology of Colleges and Universities in Jiangxi Province(KJLD14046)Young Scientist Training Project of Jiangxi Province(20122BCB23015)Yuanhang Engineering of Jiangxi Province,Graduate innovation project of Jiangxi Province(3104000089,3104100013)Graduate innovation project of Jiangxi University of Science and Technology(3104100039)~~
基金supported by the National Natural Science Foundation of China(2106700421567008+5 种基金21263005)Project of Jiangxi Province Natural Science Foundation China(20133BAB21003)Training Programs of Innovation and Entrepreneurship for Undergraduates of Jiangxi Province(201310407046)The Landing Project of Science and Technology of Colleges and Universities in Jiangxi Province(KJLD14046)Young Scientist Training Project of Jiangxi Province(20122BCB23015)Yuanhang Engineering of Jiangxi Province~~
基金supported by the National Natural Science Foundation of China(2127303621177024)+1 种基金the National Basic Research Program of China(973 Program2014CB239303)~~