| 袁朝阳， 路阳， 程诚， 陈旭.0 ℃以下湿球温度测量法及实验验证[J].轻工机械,2019,37(4):79-83 |
| 0 ℃以下湿球温度测量法及实验验证 |
| Wet Bulb Temperature Measurement and Experimental Verification Below 0 ℃ |
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| DOI：10.3969/j.issn.1005 2895.2019.04.015 |
| 中文关键词: 温度测量 湿球 等湿加热 相对湿度 |
| 英文关键词:temperature measuring wet bulb equal humidity heating relative humidity |
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| 中文摘要: |
| 环境温度在0 ℃以下的工程测试中，湿球纱布测量法因蒸馏水结冰会出现测量失真的问题。为此，课题组提出了一种等湿加热的湿球温度计测法。[JP2]笔者首先阐释了计测湿球温度的原理；其次依据该原理设计了一种新的湿球温度测量装置并用于实验；最后分析了该测量装置的不确定度，对比了计测值与实测值之间的差异。结果表明：环境温度0 ℃以上，计测得到的湿球温度与PT100铂电阻的测量值之间的相对偏差均在±0.1 ℃以内；环境温度0 ℃以下，计测得到的相对湿度与温湿度传感器的测量值之间的相对偏差均在±3%以内。该计测法满足替代测量要求，具有较好的适用性。 |
| 英文摘要: |
| It is often found in engineering test that the method of obtaining wet bulb temperature by measuring the temperature of distilled water after evaporation and heat absorption is no longer applicable in the low temperature environment below 0 ℃. In this regard, the author proposed a wet bulb temperature calculation method to solve this problem. Firstly, the measuring accuracy of air source heat pump under several common working conditions was calculated theoretically, which proved the reliability of the measuring method. Secondly, a wet bulb temperature measuring device was designed according to the measuring theory and applied to the experiment. The difference between the measured value and the measured value in the whole cooling process of the enthalpy difference environment chamber was compared. The results show that the relative error between the wet bulb temperature measured by the method and the platinum resistance measured by PT100 is less than 0.1 ℃ when the inlet air temperature is above 0 ℃, the relative error between the relative humidity measured by the measuring method and the relative humidity measured by the relative humidity meter is less than 3% when the inlet air temperature is below 0 ℃, which meets the requirements of replacing the PT100 platinum resistance and the relative humidity meter by the measuring method and has good applicability. |
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