التفاصيل البيبلوغرافية
| العنوان: |
Measuring relative humidity from evaporation with a wet-bulb thermometer: The psychrometer. |
| المؤلفون: |
Corpart, Marie, Restagno, Frédéric, Boulogne, François |
| المصدر: |
American Journal of Physics; Jan2024, Vol. 92 Issue 1, p36-42, 7p |
| مصطلحات موضوعية: |
HYGROMETERS, EVAPORATIVE cooling, FOOD conservation, THERMOMETERS, NONEQUILIBRIUM thermodynamics, HUMIDITY |
| مستخلص: |
Measuring the relative humidity of air is an important challenge for meteorological measurements, food conservation, building design, and evaporation control, among other applications. Relative humidity can be measured with a psychrometer, which is a hygrometer composed of two identical thermometers. The bulb of one thermometer is covered by a wick soaked with water so that evaporative cooling makes it indicate a lower temperature than the dry-bulb thermometer; it is possible to determine the relative humidity from the difference between these readings. We describe both a model and an experimental setup to illustrate the principle of a psychrometer for a pedagogical laboratory. The science of psychrometry could be more broadly taught at the undergraduate level to help introduce students to aspects of measurement techniques, fluid mechanics, heat transfer, and non-equilibrium thermodynamics. [ABSTRACT FROM AUTHOR] |
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