2- Air at 39.5 °C and humidity ratio of 9 (grams /kg dry air) is humidified...
2- Air at 39.5 °C and humidity ratio of 9 (grams /kg dry air) is humidified adiabatically to 70% relative humidity (sea-level pressure). Liquid water is supplied at 70 °C for humidification (hf = 293 kJ/kg, hg = 2626.1 kJ/kg) Determine:
a) The initial wet bulb temperature
b) The initial relative humidity
c) The initial density
d) The final wet bulb temperature
e) The final density
f) The final dry bulb temperature
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2- Air at 39.5 °C and humidity ratio of 9 (grams /kg dry air) is
humidified...
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...
Air enters a heating and humidification system at 5◦C, 50% relative humidity. The air first passe...
Air enters a heating and humidification system at 5◦C, 50% relative humidity. The air first passes over a heater, and is then humidified with steam. The steam is supplied at 200 kPa pressure and 300◦C. The air leaves the system at 30◦C, 60% relative humidity. (a) Determine the heat transfer to the air, per unit mass dry air. (b) Determine the temperature and relative humidity of the air leaving the heating section (i.e., prior to the humidification section). (c) Determine...
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C...
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C and a wet bulb temperature of 320C. Using both the equations for the moist air properties and the psychrometric chart find: g) the partial pressure of the water vapor h) humidity ratio i) relative humidity j) dew-point temperature k) specific volume 1) enthalpy of moist air Insert the data and the results from the chart in the following table: Enthalpy Specific kJ/kg m/kg Humidity...
1.What are the relative humidity, humidity ratio, dew point, and enthalpy for a condition where the...
1.What are the relative humidity, humidity ratio, dew point, and enthalpy for a condition where the dry‐bulb temperature is 95 oF and the wet‐bulb temperature is 70 oF? 2.What are the relative humidity, enthalpy and humidity ratio of moist air with the dry bulb temperature of 26.5 oC and dew point of 15 oC?
Theo To calculate the humidity ratio [kg(v)/kg(a)] of moist air one would use the following equat...
Theo To calculate the humidity ratio [kg(v)/kg(a)] of moist air one would use the following equation ry (2501-2.38IT..006(T -T 2501-1.805T-4.186T where Tab is the dry bulb temperature [C] and Twb is the wet bulb temperature [C swb is the saturated humidity ratio evaluated at wet bulb temperature. It is determined by 0.6219 P-P (T where Psar(Twb) is the water saturation pressure at wet bulb temperature An approximation is the following (T)6.102T) where Psat is in millibars. (1 mb 100 Pa)...
stream consisting of 130 m'/min of moist air at a rature of 8°C and a humidity ratio of 0.0015 kg(vapor)/ dry a...
stream consisting of 130 m'/min of moist air at a rature of 8°C and a humidity ratio of 0.0015 kg(vapor)/ dry air) is mixed adiabatically with a second stream 12 températ Kgl ting of 400 m3/min of moist air at 25°C and 40% relative humidity. The pressure is constant throughout at 1 bar. Using the psychrometric chart, determine (a) the humidity ratio and (b) the temperature of the exiting mixed stream, in °C
stream consisting of 130 m'/min of moist...
(10 pts) Six-thousand cubic feet per minutes (C.F.M.) of atmospheric air at 28°C (dry bulb) having...
(10 pts) Six-thousand cubic feet per minutes (C.F.M.) of atmospheric air at 28°C (dry bulb) having a wet bulb temperature of 23°C is to be cooled in an air conditioning system. The air conditioning system lowers the dry bulb temperature of the air to 20° C. Cooling with dehumidification is accomplished using chilled water loop. The chilled water enters the loop at 5°C at a rate of 280 kg/min and experience a 5°C temperature increase. The atmospheric pressure is 1...
9. A building has indoor air conditions of 70°F dry bulb temperature and 40% relative humidity....
9. A building has indoor air conditions of 70°F dry bulb temperature and 40% relative humidity. Determine the direction of water vapor flow under the following outdoor air conditions that represent a dry, heating climate: a. 32°F dry bulb temperature and 40% relative humidity (winter conditions) b. 90°F dry bulb temperature and 20% relative humidity (summer conditions) DO
On a typical autumn day, outside air with a dry bulb temperature of 15°C and 40%...
On a typical autumn day, outside air with a dry bulb temperature of 15°C and 40% relative humidity is brought into a processing facility where it is to be used for a controlled storage chamber. The air must be heated to 37°C and humidified to 90% relative humidity. Calculate: (11 marks total) The relative humidity of the air when it is heated to 37°C, but BEFORE it is humidified. (No water has been added to the air yet). (2 marks)...
u ut slatept I. 5. A dehumidifier is used to extract excess moisture from the air...
u ut slatept I. 5. A dehumidifier is used to extract excess moisture from the air inside a room with dimensions 8x6x3 m3. The room was initially at a dry bulb temperature of 30°C, 70% relative humidity and ends up to a wet bulb temperature of 11°C, 100% relative humidity. If the dry air density is 1.2 kg/m3, what mass of water vapour has been removed by the dehumidifier?
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C and a wet bulb temperature of 320C. Using both the equations for the moist air properties and the psychrometric chart find: g) the partial pressure of the water vapor h) humidity ratio i) relative humidity j) dew-point temperature k) specific volume 1) enthalpy of moist air Insert the data and the results from the chart in the following table: Enthalpy Specific kJ/kg m/kg Humidity...
Theo To calculate the humidity ratio [kg(v)/kg(a)] of moist air one would use the following equation ry (2501-2.38IT..006(T -T 2501-1.805T-4.186T where Tab is the dry bulb temperature [C] and Twb is the wet bulb temperature [C swb is the saturated humidity ratio evaluated at wet bulb temperature. It is determined by 0.6219 P-P (T where Psar(Twb) is the water saturation pressure at wet bulb temperature An approximation is the following (T)6.102T) where Psat is in millibars. (1 mb 100 Pa)...
stream consisting of 130 m'/min of moist air at a rature of 8°C and a humidity ratio of 0.0015 kg(vapor)/ dry air) is mixed adiabatically with a second stream 12 températ Kgl ting of 400 m3/min of moist air at 25°C and 40% relative humidity. The pressure is constant throughout at 1 bar. Using the psychrometric chart, determine (a) the humidity ratio and (b) the temperature of the exiting mixed stream, in °C
stream consisting of 130 m'/min of moist...
(10 pts) Six-thousand cubic feet per minutes (C.F.M.) of atmospheric air at 28°C (dry bulb) having a wet bulb temperature of 23°C is to be cooled in an air conditioning system. The air conditioning system lowers the dry bulb temperature of the air to 20° C. Cooling with dehumidification is accomplished using chilled water loop. The chilled water enters the loop at 5°C at a rate of 280 kg/min and experience a 5°C temperature increase. The atmospheric pressure is 1...
9. A building has indoor air conditions of 70°F dry bulb temperature and 40% relative humidity. Determine the direction of water vapor flow under the following outdoor air conditions that represent a dry, heating climate: a. 32°F dry bulb temperature and 40% relative humidity (winter conditions) b. 90°F dry bulb temperature and 20% relative humidity (summer conditions) DO
u ut slatept I. 5. A dehumidifier is used to extract excess moisture from the air inside a room with dimensions 8x6x3 m3. The room was initially at a dry bulb temperature of 30°C, 70% relative humidity and ends up to a wet bulb temperature of 11°C, 100% relative humidity. If the dry air density is 1.2 kg/m3, what mass of water vapour has been removed by the dehumidifier?
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