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| 果蔬用敞开式陈列柜温湿度场分布特性实验 |
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傅涛1,2, 李君1,2, 王海林1,2, 岑康华1,2, 唐本源1,2
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| (1.华南农业大学南方农业机械与装备关键技术教育部重点实验室;2.华南农业大学工程学院) |
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| 摘要: |
| 为研究带单层风幕的敞开式果蔬陈列柜温湿度分布规律，采用了一种立式敞开式陈列柜试验平台作为研究对象，分析陈列柜稳态运行阶段回温、降温和节能帘对温湿度场分布特性的影响。试验结果表明: 在无节能帘条件下，回温工况结束时温湿度场比降温工况均匀，其温度、相对湿度分布的变异系数分别为0.25、0.08。陈列柜左部温度和相对湿度均低于右部；4层搁架温度、相对湿度分布差异显著（P<0.05）。稳态运行阶段，搁架温度和相对湿度分布呈周期性振荡，周期约为17min；运用线性回归方法建立各测点相对湿度关于温度的函数模型，回归方程表明：相对湿度与温度呈线性正相关；与无节能帘时相比，节能帘条件下的柜内平均相对湿度高5.74%RH，平均温度低0.43℃，温度、相对湿度的波动幅度小，降温时间短和回温时间长。研究结果为果蔬用敞开式陈列柜性能的优化提供参考。 |
| 关键词: 陈列柜 温度 湿度 分布 |
| DOI： |
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| 基金项目:国家科技支撑计划（2013BAD19B01），国家自然科学基金（31101363）资助项目。 |
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| Experimental Study on Distribution of Temperature and Humidity Field in Vertical Open Display Cabinet for Fruits and Vegetables |
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Fu Tao1,2, Li Jun1,2, Wang Hailin1,2, Cen Kanghua1,2, Tang Benyuan1,2
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| (1.Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University;2.College of Engineering, South China Agricultural University) |
| Abstract: |
| In order to investigate the distribution of temperature and relative humidity of the fruit and vegetable open display cabinet with single-band air curtain, an experimental platform of the vertical open display cabinet was used for refrigeration test. The distribution characteristics of temperature and relative humidity of the testing display cabinet under the cooling and temperature raising conditions was analyzed. The effect of night covers was also explored. The experimental results showed that the temperature and humidity are well-distributed under temperature raising condition, and the coefficient variation (CV) of temperature and the relative humidity distribution is 0.25 and 0.08 respectively. The temperature and relative humidity of the right of the display cabinet are higher than those of the left horizontally. The distribution of temperature and relative humidity in four shelves differs significantly (P<0.05) in the orthogonal direction. During the steady-state operation the temperature and relative humidity distribution in four shelves is periodic oscillation and the period is about 17min. To study the overall temperature and relative humidity of the display cabinet, the linear regression method was used to predict the effect of the relative humidity on the temperature. The regression model showed that temperature is linear with the relative humidity. Night covers can keep the relative humidity and the amplitude of temperature with minor changes, shorten the cooling time and prolong the temperature raising time. Compared with no night covers, the average relative humidity is higher by 5.74%RH and average temperature is lower by 0.43℃. The results will provide references to optimize the performance design of the fruit and vegetable open display cabinet. |
| Key words: display cabinet temperature relative humidity distribution |
