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http://dx.doi.org/10.12791/KSBEC.2020.29.2.110

Performance Improvement of a Temperature and Humidity Measuring System for Strawberry Cultivation Greenhouse  

Jeong, Young Kyun (Department of Agricultural Engineering Gyeongsang National Univ (Institute of Agriculture and Life Science, GNU))
Lee, Jong Goo (Department of Agricultural Engineering Gyeongsang National Univ (Institute of Agriculture and Life Science, GNU))
Ahn, Enu Ki (UBN Corporation)
Seo, Jae Seok (UBN Corporation)
Yoon, Yong Cheol (Department of Agricultural Engineering Gyeongsang National Univ (Institute of Agriculture and Life Science, GNU))
Publication Information
Journal of Bio-Environment Control / v.29, no.2, 2020 , pp. 110-119 More about this Journal
Abstract
This study investigates the improvement in the performance of a temperature and humidity measuring system developed by Company A using the Aspirated Radiation Shield (ARS). The shield has been used in the industry and its accuracy was verified recently. The study also experimentally examines the impact of the wind speed of the ARS device on temperature and humidity. The results are summarized as follows. Before the improvement of the system, the temperature of Company A's system was up to 10.2℃ higher than that measured by the ARS device, and the measured relative humidity was approximately 20.0% lower. After improving the system, the temperature and relative humidity of nodes 1 and 2 were found to be almost identical. The temperature deviations including the maximum, mean, and minimum temperatures between those measured in node 2 and by ARS were approximately 0.2 to 0.7℃, respectively; further, the values measured by ARS tended to be slightly lower or higher. In terms of relative humidity, the ARS measurements yielded values approximately 10.0% higher immediately after sunset; otherwise, the values were approximately 1.9% lower. Moreover, when node 1 was set to minimum-middle, middle-maximum, and maximum, the deviations including the maximum, mean, and minimum temperatures of nodes 1 and 2 were 0.1 to 0.4℃, 0.0 to 0.2℃, and 0.0 to 0.5℃, respectively. The deviations including the maximum, average, and minimum temperatures of the three points of node 1 and the ARS ranged from 0.2 to 0.5℃, 0.1 to 2.2℃, and 0.1 to 1.1℃, respectively, indicating that the temperature deviation according to the wind speed was negligible. In addition, considering the results of the previous study with those from this study, the optimal wind speed to improve the temperature deviation is considered to be in the range of 1.0~2.0 m·s-1.
Keywords
aspirated radiation shield; relative humidity; solar radiation; temperature; titration wind speed;
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Times Cited By KSCI : 7  (Citation Analysis)
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