日光温室金属膜集放热装置增温效果的性能测试

日光温室冬季夜间温度较低,为满足作物能正常生长往往需要加温装置,为此,该课题组设计了一种双黑膜主动集放热装置,该装置白天以热辐射和热对流的模式吸收太阳辐射热和温室内空气中的热量,夜间通过热对流的模式将热量释放到温室中,以增加温室夜间温度。通过冬季加温试验发现该装置对太阳辐射的吸收率偏低,为进一步提升该装置的集放热性能,该文对原有双黑膜集放热装置进行了改进,用金属膜替换原有双黑膜吸热面,试验结果表明：运行金属膜集放热装置能将温室夜间最低温度提高2.4℃,装置的集热效率为83%,热量的有效利用率为68%;与电加热加温方式相比节能量为110 MJ,节能72.6%,节能效果显著;金属膜集放热装置对太阳...

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Bibliographic Details
Published in农业工程学报 Vol. 31; no. 15; pp. 177 - 182
Main Author 方慧 张义 杨其长 卢威 周波 周升
Format Journal Article
LanguageChinese
Published 中国农业科学院农业环境与可持续发展研究所，北京 100081 2015
农业部设施农业节能与废弃物处理重点实验室，北京 100081
Subjects
加热设备
放热
日光温室
温室
节能
蓄热
greenhouses
放热
heat release
温室
energy conservation
蓄热
Chinese solar greenhouse
heat storage
节能
加热设备
heating equipment
日光温室
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2015.15.024

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Summary:日光温室冬季夜间温度较低,为满足作物能正常生长往往需要加温装置,为此,该课题组设计了一种双黑膜主动集放热装置,该装置白天以热辐射和热对流的模式吸收太阳辐射热和温室内空气中的热量,夜间通过热对流的模式将热量释放到温室中,以增加温室夜间温度。通过冬季加温试验发现该装置对太阳辐射的吸收率偏低,为进一步提升该装置的集放热性能,该文对原有双黑膜集放热装置进行了改进,用金属膜替换原有双黑膜吸热面,试验结果表明：运行金属膜集放热装置能将温室夜间最低温度提高2.4℃,装置的集热效率为83%,热量的有效利用率为68%;与电加热加温方式相比节能量为110 MJ,节能72.6%,节能效果显著;金属膜集放热装置对太阳辐射的吸收系数为0.81,比双黑膜集放热装置提高了0.22;白天温室自然通风条件下,装置与空气间的对流换热系数为14.6W/（m2·℃）,比双黑膜蓄放热装置高6.3 W/（m2·℃）。
Bibliography:Fang Hui;Zhang Yi;Yang Qichang;Lu Wei;Zhou Bo;Zhou Sheng;（1. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 2. Key Lab of Energy Conservation and Waster Treatment of Agricultural Structures, Ministry of Agriculture, Beo＇ing 100081, China）
11-2047/S
greenhouses; heating equipment; heat storage; energy conservation; heat release; Chinese solar greenhouse
The Chinese Solar Greenhouse（CSG） that is widely used in North China is characterized by a lean-to south-facing roof, a removable insulating blanket and a solid north wall. The south facing roof structure and removable insulating blanket maximize the exposure to short-wave radiation during the day and minimize heat loss at night, respectively. To increase the year-round greenhouse production in North China, a sustainable heating method needs to be developed to increase the night air temperature during the winter in CSGs. Solar heating is an inexpensive and effective way to heat
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2015.15.024