Artificial Radiation Frost Chamber for Frost Formation on Tea
The Yangtze River region is the main production area for famous, high-quality tea in China. Radiation frost frequently occurs in this region, especially in the early spring during calm and clear nights, and it causes substantial damage to crops, which leads to huge economic losses for tea growers. T...
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| Format: | Article |
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MDPI AG
2019-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/22/4726 |
| _version_ | 1819237806659076096 |
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| author | Yong-Zong Lu Yong-Guang Hu Jin-Tao Tian Huan Song Richard L. Snyder |
| author_facet | Yong-Zong Lu Yong-Guang Hu Jin-Tao Tian Huan Song Richard L. Snyder |
| author_sort | Yong-Zong Lu |
| collection | DOAJ |
| description | The Yangtze River region is the main production area for famous, high-quality tea in China. Radiation frost frequently occurs in this region, especially in the early spring during calm and clear nights, and it causes substantial damage to crops, which leads to huge economic losses for tea growers. The formation of frost is difficult to experimentally control due to the complexity and variability of the agro-micrometeorological environment. The objective of this study was to evaluate an artificial radiation frost chamber based on the temperature difference between leaf and air dew point, which was designed for advanced frost-related research. Micro-meteorological data and the frost formation process were monitored in an experimental tea field during typical radiation frost nights to mimic declining temperatures that are consistent with nature. The radiation frost chamber model and main parameters were determined by theoretical calculations and computational fluid dynamics (CFD) simulation. A frost-forming experiment was conducted to evaluate the performance of the frost chamber. The observation results showed that the greatest temperature difference between leaf and air dew point (<i>T<sub>differ</sub></i>) was −2.3 °C. The simulation results showed that the desublimation cooling rate of the air vapor was greater than sublimation, and the <i>T<sub>differ</sub></i> should be greater than −3.2 °C, which could cause frost to easily form on the leaf. The performance testing results showed that leaf temperature slowly declined after a rapid decrease, which is similar to the natural condition, which results in noticeable frost formation on the leaf. |
| first_indexed | 2024-12-23T13:26:11Z |
| format | Article |
| id | doaj.art-9c0caac7ec9e43de930bec1ad8658880 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-23T13:26:11Z |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-9c0caac7ec9e43de930bec1ad86588802022-12-21T17:45:19ZengMDPI AGApplied Sciences2076-34172019-11-01922472610.3390/app9224726app9224726Artificial Radiation Frost Chamber for Frost Formation on TeaYong-Zong Lu0Yong-Guang Hu1Jin-Tao Tian2Huan Song3Richard L. Snyder4School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, ChinaDepartment of Land, Air and Water Resources, University of California, Davis, CA 95616, USAThe Yangtze River region is the main production area for famous, high-quality tea in China. Radiation frost frequently occurs in this region, especially in the early spring during calm and clear nights, and it causes substantial damage to crops, which leads to huge economic losses for tea growers. The formation of frost is difficult to experimentally control due to the complexity and variability of the agro-micrometeorological environment. The objective of this study was to evaluate an artificial radiation frost chamber based on the temperature difference between leaf and air dew point, which was designed for advanced frost-related research. Micro-meteorological data and the frost formation process were monitored in an experimental tea field during typical radiation frost nights to mimic declining temperatures that are consistent with nature. The radiation frost chamber model and main parameters were determined by theoretical calculations and computational fluid dynamics (CFD) simulation. A frost-forming experiment was conducted to evaluate the performance of the frost chamber. The observation results showed that the greatest temperature difference between leaf and air dew point (<i>T<sub>differ</sub></i>) was −2.3 °C. The simulation results showed that the desublimation cooling rate of the air vapor was greater than sublimation, and the <i>T<sub>differ</sub></i> should be greater than −3.2 °C, which could cause frost to easily form on the leaf. The performance testing results showed that leaf temperature slowly declined after a rapid decrease, which is similar to the natural condition, which results in noticeable frost formation on the leaf.https://www.mdpi.com/2076-3417/9/22/4726air dew pointcfd simulationleaf-air temperature differenceleaf temperatureradiation-frost chamber |
| spellingShingle | Yong-Zong Lu Yong-Guang Hu Jin-Tao Tian Huan Song Richard L. Snyder Artificial Radiation Frost Chamber for Frost Formation on Tea Applied Sciences air dew point cfd simulation leaf-air temperature difference leaf temperature radiation-frost chamber |
| title | Artificial Radiation Frost Chamber for Frost Formation on Tea |
| title_full | Artificial Radiation Frost Chamber for Frost Formation on Tea |
| title_fullStr | Artificial Radiation Frost Chamber for Frost Formation on Tea |
| title_full_unstemmed | Artificial Radiation Frost Chamber for Frost Formation on Tea |
| title_short | Artificial Radiation Frost Chamber for Frost Formation on Tea |
| title_sort | artificial radiation frost chamber for frost formation on tea |
| topic | air dew point cfd simulation leaf-air temperature difference leaf temperature radiation-frost chamber |
| url | https://www.mdpi.com/2076-3417/9/22/4726 |
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