Homework Answers
from the psyhometric chart we can clearly find the answer using the given conditions
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11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40...
PROBLEM A rigid tank with a volume of 2.4 m3 contains a moist air mixture having...
PROBLEM A rigid tank with a volume of 2.4 m3 contains a moist air mixture having 2.7 kg of dry air at a dry bulb temperature of 26°C and a total pressure of 1 atm. Determine the relative humidity of the air, the mass of water vapor in the tank, and the internal energy of the air (in kilojoules).
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...
Exercise 3 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 29...
Exercise 3 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 29 C and a wet bulb temperature of 22°C. Using the psychrometric chart and the table for saturated vapor find the following air properties: Pr T- 40 a) the partial pressure of the water vapor b) humidity ratio c) relative humidity d) dew-point temperature e) specific volume ) enthalpy of moist air
10-kg moist air at the temperature of 24°C, the pressure of 100 kPa, and relative humidity of 90% is enclosed in a cylinder and piston assembly. The enclosed air is cooled down to the temperature of 1...
10-kg moist air at the temperature of 24°C, the pressure of 100 kPa, and relative humidity of 90% is enclosed in a cylinder and piston assembly. The enclosed air is cooled down to the temperature of 12°C at a constant pressure process (when piston can move freely). Determine a) at what temperature vapor starts to condense and b) the mass of condensed water during the process using the psychrometric chart.
A moist air of 25 °C and 200 kPa with relative humidity of 50% is mixed...
A moist air of 25 °C and 200 kPa with relative humidity of 50%
is mixed with nitrogen of 25 °C and 200 kPa. Then, the mixture is
expanded through a turbine to 100 kPa. Assuming the turbine is
ideal, determine the minimum nitrogen and moist air mole ratio
(kmol N2/kmol moist air) that does not induce condensation within
the turbine. Assume specific heat ratios are same for water vapor,
dry air, and nitrogen as 1.4.
3. (10 points) A...
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
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...
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...
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...
Moist air at 24°C, 1 atm, and 35% relative humidity enters an evaporative cooling unit operating...
Moist air at 24°C, 1 atm, and 35% relative humidity enters an evaporative cooling unit operating at steady state consisting of a heating section followed by a soaked pad evaporative cooler operating adiabatically. The air passing through the heating section is heated to 45°C. Next, the air passes through a soaked pad exiting with 50% relative humidity. Using data from the psychrometric chart, determine: (a) the humidity ratio of the entering moist air mixture, in kg(vapor) per kg(dry air). (b)...
PROBLEM A rigid tank with a volume of 2.4 m3 contains a moist air mixture having 2.7 kg of dry air at a dry bulb temperature of 26°C and a total pressure of 1 atm. Determine the relative humidity of the air, the mass of water vapor in the tank, and the internal energy of the air (in kilojoules).
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...
Exercise 3 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 29 C and a wet bulb temperature of 22°C. Using the psychrometric chart and the table for saturated vapor find the following air properties: Pr T- 40 a) the partial pressure of the water vapor b) humidity ratio c) relative humidity d) dew-point temperature e) specific volume ) enthalpy of moist air
A moist air of 25 °C and 200 kPa with relative humidity of 50%
is mixed with nitrogen of 25 °C and 200 kPa. Then, the mixture is
expanded through a turbine to 100 kPa. Assuming the turbine is
ideal, determine the minimum nitrogen and moist air mole ratio
(kmol N2/kmol moist air) that does not induce condensation within
the turbine. Assume specific heat ratios are same for water vapor,
dry air, and nitrogen as 1.4.
3. (10 points) A...
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
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...
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...
Moist air at 24°C, 1 atm, and 35% relative humidity enters an evaporative cooling unit operating at steady state consisting of a heating section followed by a soaked pad evaporative cooler operating adiabatically. The air passing through the heating section is heated to 45°C. Next, the air passes through a soaked pad exiting with 50% relative humidity. Using data from the psychrometric chart, determine: (a) the humidity ratio of the entering moist air mixture, in kg(vapor) per kg(dry air). (b)...
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