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Problem 14.9: Two airstreams are mixed steadily and adiabatically. The first stream enters at 35°C and...
Two airstreams are mixed steadily and adiabatically. The first stream enters at 3 percent relative humidity at a rate of 10 m'/min, while the second stream enters at 8°C and 90 percent relati...
Two airstreams are mixed steadily and adiabatically. The first stream enters at 3 percent relative humidity at a rate of 10 m'/min, while the second stream enters at 8°C and 90 percent relative humidity at a rate of 15 mlmin. Assuming that the mixing process occurs at a pressure of I atm, (a) determine the specific humidity (20 points), (b) the relative humidity (20 ints), (e) the dry-bulb temperature (10 points), and the (d) volume flow rate of the mixture...
8°C and 20 3 Two airstreams are mixed steadily and adiabatically. The first stream enters at percent relative humidity at a rate of 10 m'/min, while the second stream enters at 8°C and 90 percent...
8°C and 20 3 Two airstreams are mixed steadily and adiabatically. The first stream enters at percent relative humidity at a rate of 10 m'/min, while the second stream enters at 8°C and 90 percent relative humidity at a rate of 15 m/min. Assuming that the mixing process occurs at a pressure of I atm, (e) determine the specific humidity (20 points), (b) the relative humidity (20 points), (c) the dry-bulb temperature 20 (10 points), and the (d) volume flow...
A stream of air (stream 1) at 60°F, 1 atm, 30% relative humidity is mixed adiabatically...
A stream of air (stream 1) at 60°F, 1 atm, 30% relative humidity is mixed adiabatically with a stream of air (stream 2) at 90°F, 1 atm, 80% relative humidity. A single stream (stream 3) exits the mixing chamber at temperature T3 and 1 atm. Assume steady state and ignore kinetic and potential energy effects. Letting r denote the ratio of dry air mass flow rates m˙a1/m˙a2 determine T3, in °F, for r = 0.1 T3 = ______ F
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...
2) Very humid air enters a dehumidifier at 500 ft^3/min. The air is at a dry-bulb...
2) Very humid air enters a dehumidifier at 500 ft^3/min. The air is at a dry-bulb temperature of 85 degrees F and a relative humidity of 90%. The specific humidity of the mixture must be brought to 30 grains of water per pound mass of air. Assume atmospheric mixture pressure. A) How low must the dry-bulb temperature go to achieve this? B) What is the rate at which energy must be removed to accomplish the reduction in specific humidity, in...
4) 15% Air psychometric chart). enters and exits an air conditioner with the properties shown below...
4) 15% Air psychometric chart). enters and exits an air conditioner with the properties shown below (as determined from the Cooling cols Air Condensate Property Estering Exiting | 2S Dry bulb temperature CC)-35 ℃ Wet bulb temperature ("C1-20℃ Eethalpy (h, kJ/kg dry air)$7.5 40.9 Absolute humidity (o, kg H-O/kg dry air) 0.0085 0 0062 0.882 Specific volume (m/kg)1 0.8850 The condensate leaves volume flow rate of the air returned to the workspace is 800 m3/min. Atmospheric pressure is 9 the...
Please show clear working Qn.7. Adiabatic mixing 300 m3/min of fresh air at 30 °C DBT...
Please show clear working
Qn.7. Adiabatic mixing 300 m3/min of fresh air at 30 °C DBT and 50% RH is to be mixed with 800 m3/min of recirculated air at 22 °C DBT and 10 °C wet bulb temperature. Determine the (1) enthalpy, (2) specific volume, (3) relative humidity, (4) dry-bulb temperature and (5) dew point temperature of the mixture. Ans. [(1) 38.24 kJ/kg, (2) 0.849 m/kg (3) 29%, (4) 24.2 °C, (5) 5°C]
a) Define relative humidity (2 marks) b) Describe the relation between relative humidity, the capacity of...
a) Define relative humidity (2 marks) b) Describe the relation between relative humidity, the capacity of air to hold moisture a ambient temperature. (2 marks) c) Moist air at 22°C and a wet bulb temperature of 9°C enters a steam spray humidifier. The mass flow of the dry air is 90 kg/min. Saturated water vapor at 110 °C is injected into the mixture at a rate of 52 kg/hr. There is no heat transfer with the surroundings, and the pressure...
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.
A hot-water stream at 80°C enters a mixing chamber with a mass flow rate of 0.56...
A hot-water stream at 80°C enters a mixing chamber with a mass flow rate of 0.56 kg/s where it is mixed with a stream of cold water at 20°C. If it is desired that the mixture leave the chamber at 42°C, determine the mass flow rate of the cold-water stream. Assume all the streams are at a pressure of 250 kPa. The enthalpies are 335.02 kJ/kg, 83.915 kJ/kg, and 175.90 kJ/kg. The saturation temperature at a pressure of 250 kPa...
Two airstreams are mixed steadily and adiabatically. The first stream enters at 3 percent relative humidity at a rate of 10 m'/min, while the second stream enters at 8°C and 90 percent relative humidity at a rate of 15 mlmin. Assuming that the mixing process occurs at a pressure of I atm, (a) determine the specific humidity (20 points), (b) the relative humidity (20 ints), (e) the dry-bulb temperature (10 points), and the (d) volume flow rate of the mixture...
8°C and 20 3 Two airstreams are mixed steadily and adiabatically. The first stream enters at percent relative humidity at a rate of 10 m'/min, while the second stream enters at 8°C and 90 percent relative humidity at a rate of 15 m/min. Assuming that the mixing process occurs at a pressure of I atm, (e) determine the specific humidity (20 points), (b) the relative humidity (20 points), (c) the dry-bulb temperature 20 (10 points), and the (d) volume flow...
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...
4) 15% Air psychometric chart). enters and exits an air conditioner with the properties shown below (as determined from the Cooling cols Air Condensate Property Estering Exiting | 2S Dry bulb temperature CC)-35 ℃ Wet bulb temperature ("C1-20℃ Eethalpy (h, kJ/kg dry air)$7.5 40.9 Absolute humidity (o, kg H-O/kg dry air) 0.0085 0 0062 0.882 Specific volume (m/kg)1 0.8850 The condensate leaves volume flow rate of the air returned to the workspace is 800 m3/min. Atmospheric pressure is 9 the...
Please show clear working
Qn.7. Adiabatic mixing 300 m3/min of fresh air at 30 °C DBT and 50% RH is to be mixed with 800 m3/min of recirculated air at 22 °C DBT and 10 °C wet bulb temperature. Determine the (1) enthalpy, (2) specific volume, (3) relative humidity, (4) dry-bulb temperature and (5) dew point temperature of the mixture. Ans. [(1) 38.24 kJ/kg, (2) 0.849 m/kg (3) 29%, (4) 24.2 °C, (5) 5°C]
a) Define relative humidity (2 marks) b) Describe the relation between relative humidity, the capacity of air to hold moisture a ambient temperature. (2 marks) c) Moist air at 22°C and a wet bulb temperature of 9°C enters a steam spray humidifier. The mass flow of the dry air is 90 kg/min. Saturated water vapor at 110 °C is injected into the mixture at a rate of 52 kg/hr. There is no heat transfer with the surroundings, and the pressure...
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.
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