Determine Air Flow Using Wet Bulb Dry Bulb

Aug 29, 2011 · can anyone explain this to me. what does wet bulb/dry bulb mean? i havnt gotten a straight answer yet

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Dry bulb temperature is the commonly measured thermometer temperature. Wet bulb temperature is determined by moving air past a wetted fabric wick covering the sensor bulb.

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Sep 15, 2006 · How do I determine the entering and leaving wet bulb and dry bulb temperatures? Normally I use the HAP program and it gives them to me. I manually calculated the unit and now am unable to complete my split system schedule.

The wet-bulb temperature is the temperature read by a thermometer covered in water-soaked cloth (wet-bulb thermometer) over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature (dry-bulb temperature) and is lower at lower humidity.

The Dry Bulb, Wet Bulb and Dew Point temperatures are important to determine the state of humid air. The knowledge of only two of these values is enough to determine the state of the moist air – including the content of water vapor and the sensible and latent energy (enthalpy) in the air.

Psychrometer (Wet-and-dry-bulb thermometer) A psychrometer, or wet-and-dry-bulb thermometer, consists of two thermometers, one that is dry and one that is kept moist with distilled water on a sock or wick.

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Dry-Bulb Temperature: Dry bulb temperature is what is usually meant by “air temperature”. It is measured with a normal thermometer.

If checked, results are calculated in units of Moist Air mass & volume. This is used for the highest accuracy, it is necessary for high temperatures and humidity. If not checked, results are calculated in units of Dry Air and the moisture it could theoretically carry.

Estimate moist air relative humidity by measuring dry and wet bulb temperature

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