What is difference between dry bulb and wet bulb temperature?

What is difference between dry bulb and wet bulb temperature?

The dry bulb temperature is the ambient air temperature that is measured by regular thermometers, while the wet bulb temperature is measured by thermometers that are wrapped in wetted wicks. The greater the wet bulb depression, the greater the felt effect is on the discharge air temperature.

What is the temperature of the dry bulb thermometer?

Dry-bulb temperature – Tdb, can be measured using a normal thermometer freely exposed to the air but shielded from radiation and moisture. The temperature is usually given in degrees Celsius (oC) or degrees Fahrenheit (oF). The SI unit is Kelvin (K). Zero Kelvin equals to -273oC.

What does it mean when the wet and dry bulb thermometers are the same temperatures?

Evaporation is an endothermic process, which means it absorbs heat, so the wet bulb temperature is lower than the dry bulb temperature or the same. If the relative humidity is 100 percent, which means the air can’t hold any more moisture, no evaporation occurs, and the wet bulb and dry bulb temperatures are the same.

When dry bulb temperature and wet bulb temperature are measured greater the difference between debit and WBT?

MCQ: When dry bulb temperature (DBT) and wet bulb temperature (WBT) are measured, greater the difference between DBT and WBT, greater the amount of water vapour held in the mixture. smaller the amount of water vapour held in the mixture. same the amount of water vapour held in the mixture.

What is a comfortable wet bulb temperature?

comfortable between 68F and 82F, relative humidity affects the comfort range. The amount of water vapor contained in a given volume of air relative to the total amount of water vapor it is capable of containing, expressed as a percentage. Humans are comfortable at 15% – 75% RH, depending on activity level.

What is difference between wet bulb temperature and dew point?

The difference between dewpoint and wet bulb temperature is that dewpoint temperature is the temperature to which we should cool the air to saturate the air with water vapor whereas wet bulb temperature is the temperature that we get from a moistened thermometer bulb that is exposed to air flow.

What happens when the dry and wet bulb temperatures measured by a psychrometer are equal?

Details. Air is said to be saturated when dry bulb temperature equals wet bulb temperature. When the air is saturated, it means it cannot hold up more water vapor and hence relative humidity is 100%.

At which condition the dry bulb temperature is equal to wet bulb temperature Mcq?

Explanation: At saturation condition the dry bulb, wet bulb and dew point temperature are same with 100% relative humidity. The minimum temperature to which water can be cooled in cooling tower is equal to the wet bulb temperature of the air.

What is the role of dry-bulb temperature and wet bulb temperature in a psychrometer?

A psychrometer measures humidity by taking both a wet-bulb and a dry-bulb temperature reading. With those two values known, the other properties of the air, including its moisture content, can be determined by computation or by reading a psychrometric chart. Sling psychrometers are a choice for that purpose.

When dry-bulb temperature and wet bulb temperature are measured greater the difference between Mcq?

The wet bulb depression is the difference between the dry-bulb temperature(Air temperature) and the wet-bulb temperature.