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8) If outdoor air at 95F dry bulb and 78F web bulb is cooled to 75F...
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...
(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
In an air-conditioned office, the dry bulb temperature of the supply air is 15°C. The state...
In an air-conditioned office, the dry bulb temperature of the supply air is 15°C. The state of air in the office has dry bulb temperature of 26°C and relative humidity of 52%. By using anemometer, it is measured that the flow rate of the recirculated air is 60.34 m3 /min. The HVAC system takes 18 m3 /min of outdoor air at 35°C and 55% relative humidity. The sensible heat ratio for the cooling coil is known to be 50%. Determine:...
5) In a steamy sauna, the wall is colder than the rest of the sauna. The...
5) In a steamy sauna, the wall is colder than the rest of the sauna. The sauna starts off at a relative humidity of 0.60 and steam is continously added to the sauna. If the wall stays at a constant temperature of 15 celcius, what is the water vapor partial pressure (kPa) next to the wall when condensation forms? 6) For atmospheric air at dry bulb temperature of 30 celcius and wet bulb temperature of 25 celcius, what is the...
Problem 7 O/5 points (0%) Humid air at 1 atm, 42 °C dry bulb and 55 % relative humidity is cooled...
Problem 7 O/5 points (0%) Humid air at 1 atm, 42 °C dry bulb and 55 % relative humidity is cooled at constant pressure to a temperature 9 °C below its dew-point temperature. Sketch the psychrometric diagram for the process and determine the heat transfer from the air o kJ/kg dry air Cooling coils T2 φ2 T1 ф! 101.3 kPa i H-4」+'Condensate Condensate removal Now Problem (resets attempts) Resets Remaining: 10 Attempts Remaining: 10 Submit
Problem 7 O/5 points (0%)...
11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40...
11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40 percent, and a total pressure of 160 kPa is contained in a rigid vessel having a volume of 1.65 m3. The air is cooled until the dry bulb temperature reaches 23°C. Determine the amount of heat transferred, the final pressure of the air, and the amount of water vapor condensed during the process.
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temper...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temper...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
The air in a room has dry bulb temperatures of 27 ° C and 20 °...
The air in a room has dry bulb temperatures of 27 ° C and 20 ° C wet bulb. Determine the specific humidity and humidity relative considering a pressure of 100 kPa.
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...
(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
5) In a steamy sauna, the wall is colder than the rest of the sauna. The sauna starts off at a relative humidity of 0.60 and steam is continously added to the sauna. If the wall stays at a constant temperature of 15 celcius, what is the water vapor partial pressure (kPa) next to the wall when condensation forms? 6) For atmospheric air at dry bulb temperature of 30 celcius and wet bulb temperature of 25 celcius, what is the...
Problem 7 O/5 points (0%) Humid air at 1 atm, 42 °C dry bulb and 55 % relative humidity is cooled at constant pressure to a temperature 9 °C below its dew-point temperature. Sketch the psychrometric diagram for the process and determine the heat transfer from the air o kJ/kg dry air Cooling coils T2 φ2 T1 ф! 101.3 kPa i H-4」+'Condensate Condensate removal Now Problem (resets attempts) Resets Remaining: 10 Attempts Remaining: 10 Submit
Problem 7 O/5 points (0%)...
11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40 percent, and a total pressure of 160 kPa is contained in a rigid vessel having a volume of 1.65 m3. The air is cooled until the dry bulb temperature reaches 23°C. Determine the amount of heat transferred, the final pressure of the air, and the amount of water vapor condensed during the process.
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
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