主动蓄放热-热泵联合加温系统在日光温室的应用  

Application of heating system with active heat storage-release and heat pump in solar greenhouse

作　　者：孙维拓[1,2] 杨其长[1,2] 方慧[1,2] 张义[1,2] 管道平 卢威[1,2] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081 [2]农业部设施农业节能与废弃物处理重点实验室,北京100081 [3]北京昌平国家农业科技园区,北京102211

出　　处：《农业工程学报》2013年第19期168-177,共10页Transactions of the Chinese Society of Agricultural Engineering

基　　金：863计划资助课题(2013AA102407);国家自然科学基金资助项目(31071833);国家科技支撑计划(2011BAE01B00);公益性行业(农业)科研专项(201203002)

摘　　要：为提高主动蓄放热系统集热效率，增强日光温室抵御低温能力，设计了一套主动蓄放热．热泵联合加温系统。白天运行主动蓄放热系统，将北墙获得的太阳辐射能储存到蓄水池中；根据天气情况及蓄水池水温变化适时开启热泵机组，降低主动蓄放热系统循环水温，进而提升其集热效率；夜间室内气温较低时，通过主动蓄放热系统放热。试验结果表明：与对照温室相比，试验温室夜间气温高出5．26～6．64℃；热泵机组制热性能系数COPHPID为4.38～5．17，主动蓄放热系统可为热泵机组热源提供充足的热量，保证理想的热源温度；在日光温室特定的光热环境下，主动蓄放热一热泵联合加温系统的集热效率达到了72．32％-83．62％，总体COPSys值达5．59，节能效果显著。该研究为提高日光温室夜间温度提供了新思路。The Chinese solar greenhouse has a unique greenhouse structure that regards solar energy as the main energy source, and has characteristics such as high efficiency, energy saving, and low cost. During a cold winter night, air temperature inside a solar greenhouse is low for crop growth, which would affect crop yield and quality, due to the heat-transfer characteristics and heat capacity limit of the north wall. In recent years, in trying to promote the heat storage capacity of the solar greenhouse, the thought of active heat storage-release came forward Solar energy is a kind of clean renewable energy, but has intermittent and unstable performance when used for greenhouse heating. Meanwhile, the heat collecting efficiency of the solar thermal collector decreases with an increase in operating temperature. Thus, an active heat storage-release system （AHSRS） is difficult to use to ensure an appropriate temperature for a solar greenhouse in a frigid region or when it encounters weather conditions with weak solar radiation. As an efficient means of raising low-grade energy, the heat pump has been more and more applied to greenhouse heating which can reduce the operating temperature of the AHSRS when used in combination. In order to promote heating performance and stability of the AHSRS and improve air temperature inside a solar greenhouse at night, based on the concept of active heat storage-release, an active heat storage-release associated with heat pump heating system （AHSRHPS） applicable to solar greenhouse heating was designed in the present study. During the day, the solar energy reaching the north wall surface was absorbed by the circulating water and stored in reservoirs when the AHSRS was running. Running the heat pump unit was intended to promote low-grade heat energy and reduce the circulating water temperature which contributes to increasing the heat collecting efficiency of the AHSRS and maximum water temperature of the reservoir. When air temperature inside the solar greenhouse was low at night,

关 键 词：温室 热泵 蓄热 日光温室 放热 

分 类 号：S625.4[农业科学—园艺学]