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Dew point temperature is the temperature to which air must be cooled to become fully saturated. If it is cooled further dew appears or the air cannot hold water vapour .When the dew point temperature and air temperature are equal, the air is said to be saturated or relative humidity is 100%
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D Question 13 When the dewpoint temperature is equal to the air temperature then the relative...
When cooling 27,000 cfm of air from a temperature of 90 F and a relative humidity...
When cooling 27,000 cfm of air from a temperature of 90 F and a relative humidity of 55% to a temperature of 60 F and 100% relative humidity, the ratio of sensible heat removed from the air to total heat removed from the air is:
Find the parameters of humid air if temperature of air is 40c and relative humidity is 50%
Find the parameters of humid air if temperature of air is 40c and relative humidity is 50%
Q 1: In an air conditioning system return air at 26°C dry-bulb temperature and 50% relative...
Q 1: In an air conditioning system return air at 26°C dry-bulb temperature and 50% relative humidity is mixed with outdoor ambient air at 34°C dry-bulb temperature and 60% relative humidity. The dry air mass flow rate of outdoor air is 30% of the supply air mass flow rate to the space. The pressure is constant at 101.3 kPa. Calculate (i) the enthalpy, (ii) the humidity ratio, and (ii) the dry-bulb temperature of the supply air. (i) Compare the results...
When the air temperature is high the human body uses sweating followed by evaporative cooling to...
When the air temperature is high the human body uses sweating followed by evaporative cooling to control its temperature. This works only if the surrounding air is not already saturated with water, i.e., for relative humidities significantly below 100%. As it turns out, a 70.% relative humidity on a 90.ºF summer day in Florida will already feel very uncomfortable in the absence of a breeze. (a) Calculate the saturation (equilibrium) vapor pressure of water at 90.ºF and the actual vapor...
An air mixture is intended to moisturize. A temperature of 20 oC with a relative humidity...
An air mixture is intended to moisturize. A temperature of 20 oC with a relative humidity of 70%. If you increase the relative humidity by 90%. What molar fraction of water is needed in air at 70% and 90% humidity? (Use saturation pressure)
Please answer the relative humidity A humidifier takes in moist air at 29 °C, 1 bar,...
Please answer the relative humidity
A humidifier takes in moist air at 29 °C, 1 bar, and 50% relative humidity with a volumetric flow rate of 13 m3/s. To increase the moisture of the air, liquid water at 40 °C is sprayed into the moist air witha flow rate of 22 kg/s. Some of the liquid water evaporates into the moist air stream and the rest drain:s out of the humidifier with a temperature of 26 °C and a mass...
15. The relative humidity of air equals the ratio of the partial pressure of water in the air to ...
15. The relative humidity of air equals the ratio of the partial pressure of water in the air to the equilibrium vapor pressure of water at the same temperature times 100%. If the relative humidity of the air is 56% and its temperature is 70°F, how many grams of water are present in a room measuring 15 ft x 10 ft x 11 ft? The vapor pressure of water at 68 °F is 17.54 torr. Show your work
15. The...
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling...
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling coil at a rate of 45m3/min. The air cooling to the saturated state and leaving at a temperature of 16 °C. Determine: a- Specific humidity at each state. b- Wet bulb and dew point temperatures at the final state c- Final relative humidity. d- Mass of water condensed. e- Rate of heat removed from the air in kW. f- Show the process on Psychrometric...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...
Air pressure = 100 kPa Air temperature = 20 deg Wet-bulb (Dew Point) temperature = 16...
Air pressure = 100 kPa Air temperature = 20 deg Wet-bulb (Dew Point) temperature = 16 degC Find: - Vapor pressure - Relative humidity, - Specific humidity, - Air density
Q 1: In an air conditioning system return air at 26°C dry-bulb temperature and 50% relative humidity is mixed with outdoor ambient air at 34°C dry-bulb temperature and 60% relative humidity. The dry air mass flow rate of outdoor air is 30% of the supply air mass flow rate to the space. The pressure is constant at 101.3 kPa. Calculate (i) the enthalpy, (ii) the humidity ratio, and (ii) the dry-bulb temperature of the supply air. (i) Compare the results...
Please answer the relative humidity
A humidifier takes in moist air at 29 °C, 1 bar, and 50% relative humidity with a volumetric flow rate of 13 m3/s. To increase the moisture of the air, liquid water at 40 °C is sprayed into the moist air witha flow rate of 22 kg/s. Some of the liquid water evaporates into the moist air stream and the rest drain:s out of the humidifier with a temperature of 26 °C and a mass...
15. The relative humidity of air equals the ratio of the partial pressure of water in the air to the equilibrium vapor pressure of water at the same temperature times 100%. If the relative humidity of the air is 56% and its temperature is 70°F, how many grams of water are present in a room measuring 15 ft x 10 ft x 11 ft? The vapor pressure of water at 68 °F is 17.54 torr. Show your work
15. The...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...
Air pressure = 100 kPa Air temperature = 20 deg Wet-bulb (Dew Point) temperature = 16 degC Find: - Vapor pressure - Relative humidity, - Specific humidity, - Air density
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