2003 Fiscal Year Final Research Report Summary
Study on Thermal Fnvironment of the Energy-saving Sunlight Greenhouse
| Project/Area Number |
13660261
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
生物環境
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| Research Institution | University of Tsukuba |
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Principal Investigator |
YAMAGUCHI Tomoharu University of Tsukuba, Institute of Agriculture and Forest Engineering, Associate Professor, 農林工学系, 助教授 (40015839)
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| Project Period (FY) |
2001 – 2003
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| Keywords | sunlight greenhouse / energy saving / thermal environment / mathematical model / simulation / environmental measurement / greenhouse structure / thermal environmental design |
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| Research Abstract |
The sunlight greenhouse in China not only has excellent energy-saving advantage, but also costs little for construction and maintenance. The objectives of this study are to establish the, thermal environmental and structural design optimization and construction regularization for the sunlight greenhouse. Experimental measurements and theoretical analysis were carried out to quantitatively explain the thermal environment of the sunlight greenhouse
After developing the basic model, the modified mathematical model was developed to predict thermal environment of the sunlight greenhouse, supposed that cucumber crop was cultivated. The calculated value for the inside air temperature agreed with the measured one very well, and the resulting IA of it was 0.97. It was concluded that the mathematical model developed here had sufficient accuracy to analyze the effect of the sunlight greenhouse structure on the inside air temperature
In Beijing, Changchun, and Shenyang, detailed measurements on micrometeorology in the sunlight greenhouse were carried out to analyze the thermal environment of the greenhouse. Inside air temperature was higher by 10℃ on average than the outside air temperature without heating during the night at the coldest period The percentage of the floor soil and north wall were 75 and 18 percent on average, respectively, in the total of heat discharge during the night, and it was shown that those two parts had critical role for retaining warmth of the greenhouse air temperature during night
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Research Products
(12 results)
