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| Heat-Insulating Performance of Straw-bale Wall Solar Greenhouse |
| Received:June 24, 2015 |
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| KeyWord:solar greenhouse;straw-bale;hollow brick;temperature;heat preservation;thermal storage |
| Author Name | Affiliation | E-mail | | WU Guo-feng | Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | | | XU Yue-ding | Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | | | CHANG Zhi-zhou | Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | | | SUN En-hui | Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | | | HUANG Hong-ying | Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | sfmicrolab@163.com |
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| Abstract: |
| The purpose of this paper was to analysis the heat-insulating performance of solar greenhouse with straw-bale. A hollow brick wall was also evaluated as a control. The air temperature, the temperature at indoor and outdoor wall surface, at 5 cm depth of wall, soil temperature at different depth, and interface temperature were monitored and discussed. The results showed that the straw-bale wall has better thermal insulation properties than the hollow brick wall on both sunny and cloudy days. The dispersing heat in the hollow brick wall was 1.5 times greater than that in the straw-bale wall at night on sunny day, and 1.3 times greater than that in straw-bale wall at night on cloudy day. The lowest air temperature in straw-bale wall and hollow brick wall solar greenhouse were 5.4 ℃ and 5.8 ℃ on cloudy day, and 6.0 ℃ and 7.4 ℃ on sunny day, respectively. The air temperature in the hollow brick wall was higher than that in the straw-bale wall because of lower heat-storage performance of the hollow brick. The average soil temperature in straw-bale wall solar greenhouse(14.00±2.61)℃ was higher than that in the hollow brick wall(13.55±1.73)℃。 All the interface temperatures were influenced by the solar radiation intensity. The heat was stored in the soil and air in straw-bale wall solar greenhouse. The thermal storage ability of soil(above 10 cm) and air in straw-bale wall greenhouse was larger than that in hollow brick wall, while the thermal storage ability of straw-bale wall greenhouse was smaller than that of the hollow brick wall. The present paper provides the advantages and disadvantages of these two wall types of solar greenhouse, which would help improve the technique of straw-bale wall solar greenhouse. |
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