2. A volumetric flow of 0.4 m3/s of air at 300◦C is adiabatically mixed with 1.2...
2. A volumetric flow of 0.4 m3/s of air at 300◦C is adiabatically mixed with 1.2 m3/s at 10◦C. Find the volumetric flow rate and temperature of the mixed stream. All streams are at 1 atm pressure.
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2. A volumetric flow of 0.4 m3/s of air at 300◦C is adiabatically
mixed with 1.2...
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...
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...
Saturated humid air at 1 atm and 10°C is to be mixed with atmospheric air at...
Saturated humid air at 1 atm and 10°C is to be mixed with atmospheric air at 1 atm, 32°C, and 80 percent relative humidity, to form air of 70 percent relative humidity. Determine: (a) The proportions at which these two streams are to be mixed and the temperature of the resulting air.
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water....
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water. The interfacial temperature is 20°C. The initial temperature of the air is 25% and its velocity is 0.1 5 m/s. 1. Calculate the average mass transfer coefficient for water in the air in m/s. 2. Calculate the molar concentration of water in the air at the water-air interface in mol H20/m3 Calculate the molar concentration of water in the air far from the interface...
Problem 14.9: Two airstreams are mixed steadily and adiabatically. The first stream enters at 35°C and...
Problem 14.9: Two airstreams are mixed steadily and adiabatically. The first stream enters at 35°C and 30 percent relative humidity at a rate of 15 m'/min, while the second stream enters at 12°C and 90 percent relative humidity at a rate of 25 m/min. Assuming that the mixing process occurs at a pressure of 90kPa, determine the specific humidity, the relative humidity, the dry-bulb temperature, and the volume flow rate of the mixture.
12.54 Air at 12°C, 1 atm, and 40% relative humidity enters a heat exchanger with a...
12.54 Air at 12°C, 1 atm, and 40% relative humidity enters a heat exchanger with a volumetric flow rate of 1 m'/s. A separate stream of dry air enters at 280°C, 1 atm with a mass flow rate of 0.875 kg/s and exits at 220°C. Neglecting heat transfer between the heat exchanger and its surroundings, pressure drops of ach stream, and kinetic and potential energy effects, determine (a) the temperature of the exiting moist air, in °C
5. (30 pts) In a steady-state flow process carried out at atmosphere pressure, 2 mol/s of...
5. (30 pts) In a steady-state flow process carried out at atmosphere pressure, 2 mol/s of air at 600K is continuously mixed with 3 mol/s of air at 450 K. The product stream is at 400 K and at 1 atm. Assume the ideal-gas state for air with Cp=7/2 R, and that kinetic and potential-energy changes of the streams are negligible, and the surroundings are at 300 K. a) What is the rate of heat transfer? b) What is the...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
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...
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...
Saturated humid air at 1 atm and 10°C is to be mixed with atmospheric air at 1 atm, 32°C, and 80 percent relative humidity, to form air of 70 percent relative humidity. Determine: (a) The proportions at which these two streams are to be mixed and the temperature of the resulting air.
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water. The interfacial temperature is 20°C. The initial temperature of the air is 25% and its velocity is 0.1 5 m/s. 1. Calculate the average mass transfer coefficient for water in the air in m/s. 2. Calculate the molar concentration of water in the air at the water-air interface in mol H20/m3 Calculate the molar concentration of water in the air far from the interface...
Problem 14.9: Two airstreams are mixed steadily and adiabatically. The first stream enters at 35°C and 30 percent relative humidity at a rate of 15 m'/min, while the second stream enters at 12°C and 90 percent relative humidity at a rate of 25 m/min. Assuming that the mixing process occurs at a pressure of 90kPa, determine the specific humidity, the relative humidity, the dry-bulb temperature, and the volume flow rate of the mixture.
12.54 Air at 12°C, 1 atm, and 40% relative humidity enters a heat exchanger with a volumetric flow rate of 1 m'/s. A separate stream of dry air enters at 280°C, 1 atm with a mass flow rate of 0.875 kg/s and exits at 220°C. Neglecting heat transfer between the heat exchanger and its surroundings, pressure drops of ach stream, and kinetic and potential energy effects, determine (a) the temperature of the exiting moist air, in °C
5. (30 pts) In a steady-state flow process carried out at atmosphere pressure, 2 mol/s of air at 600K is continuously mixed with 3 mol/s of air at 450 K. The product stream is at 400 K and at 1 atm. Assume the ideal-gas state for air with Cp=7/2 R, and that kinetic and potential-energy changes of the streams are negligible, and the surroundings are at 300 K. a) What is the rate of heat transfer? b) What is the...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
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