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1. In a ventilation system inside air at 34°C and 70% relative humidity is blown through...
Atmospheric air at 32°C and 70% relative humidity passes through a cooling section in an air-conditioning...
Atmospheric air at 32°C and 70% relative humidity passes through a cooling section in an air-conditioning duct where the air is cooled below its dew point and some of the water is removed. The air then passes over a heating section where heat is added until the final temperature is 22°C and the relative humidity is 45%. Assume the process occurs at constant pressure of 1 atm. Using the psychrometric chart, determine: (a) The amount of water removed in the...
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...
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)...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m/hrs. enters a control volume at steady state and flow along a surface maintained at 65° C, through which heat transfer occurs. Liquid water at 20° C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wev =0, and kinetic and potential energy effects are negligible. Moist air exits at 32°C, 1 atm. (a) draw...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m²/hrs. enters a control volume at steady state and flow along a surface maintained at 65°C, through which heat transfer occurs. Liquid water at 20°C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wev=0, and kinetic and potential energy effects are negligible. Moist air exits at 32°C, 1 atm. (a) draw the system schematic...
Moist air at 20° c, 1 atm, and 43% relative humidity and a volumetric flow rate...
Moist air at 20° c, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m/hrs. enters a control volume at steady state and flow along a surface maintained at 65 C, through which heat transfer occurs. Liquid water at 20" C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wa=0, and kinetic and potential energy effects are negligible. Moist air exits at 32c, 1 atm, (a) draw...
Exhaust Air Heat Wheel Return Air HRU Outlet Ventilation Air Wheel Type Total HRU .8 Two...
Exhaust Air Heat Wheel Return Air HRU Outlet Ventilation Air Wheel Type Total HRU .8 Two types of heat recovery units. CHAPTER 4 PROBLEMS 4.1 A sling psychrometer measures the air tempera- tures to be 85°F dry bulb and 72°F wet bulb. Find: relative humidity, dew-point temperature, humidity ratio (in lbmv/lbma and grains), specific volume, and enthalpy. Show results on a chart and verify with the program PsychProcess.xls (on the accom- panying CD). Assume sea level elevation. 4.2 Air flowing...
Air is at 1 atm, 40°C, and 20 percent relative humidity. Water at 22°C is evaporated...
Air is at 1 atm, 40°C, and 20 percent relative humidity. Water
at 22°C is evaporated into this air to produce air at 25°C and 80
percent relative humidity. How much water, in kg H2O/kg dry air, is
required and how much cooling, in kJ/kg dry air, has been produced?
Use data from the tables.
Please help solve the amount
of cooling produced. I believe I am reading the psychrometric chart
incorrectly
Water T c Humidifier 1 atm 40? 20%...
Ouestion 2 (3 marks) Moist air enters the evaporator of an air conditioner at t. 26°C...
Ouestion 2 (3 marks) Moist air enters the evaporator of an air conditioner at t. 26°C and -70 %. After leaving the evaporator, the relative humidity o,100% and the temperature of the air t tpl-7°C, where tdp is the dew point temperature of the air entering the evaporator. Given: - The mass flow rate of the air passing through the evaporator: 1000kg of dry air/h - The mass flow rate of the air passing through the condenser: 2500kg of dry...
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)...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m/hrs. enters a control volume at steady state and flow along a surface maintained at 65° C, through which heat transfer occurs. Liquid water at 20° C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wev =0, and kinetic and potential energy effects are negligible. Moist air exits at 32°C, 1 atm. (a) draw...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m²/hrs. enters a control volume at steady state and flow along a surface maintained at 65°C, through which heat transfer occurs. Liquid water at 20°C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wev=0, and kinetic and potential energy effects are negligible. Moist air exits at 32°C, 1 atm. (a) draw the system schematic...
Moist air at 20° c, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m/hrs. enters a control volume at steady state and flow along a surface maintained at 65 C, through which heat transfer occurs. Liquid water at 20" C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wa=0, and kinetic and potential energy effects are negligible. Moist air exits at 32c, 1 atm, (a) draw...
Exhaust Air Heat Wheel Return Air HRU Outlet Ventilation Air Wheel Type Total HRU .8 Two types of heat recovery units. CHAPTER 4 PROBLEMS 4.1 A sling psychrometer measures the air tempera- tures to be 85°F dry bulb and 72°F wet bulb. Find: relative humidity, dew-point temperature, humidity ratio (in lbmv/lbma and grains), specific volume, and enthalpy. Show results on a chart and verify with the program PsychProcess.xls (on the accom- panying CD). Assume sea level elevation. 4.2 Air flowing...
Air is at 1 atm, 40°C, and 20 percent relative humidity. Water
at 22°C is evaporated into this air to produce air at 25°C and 80
percent relative humidity. How much water, in kg H2O/kg dry air, is
required and how much cooling, in kJ/kg dry air, has been produced?
Use data from the tables.
Please help solve the amount
of cooling produced. I believe I am reading the psychrometric chart
incorrectly
Water T c Humidifier 1 atm 40? 20%...
Ouestion 2 (3 marks) Moist air enters the evaporator of an air conditioner at t. 26°C and -70 %. After leaving the evaporator, the relative humidity o,100% and the temperature of the air t tpl-7°C, where tdp is the dew point temperature of the air entering the evaporator. Given: - The mass flow rate of the air passing through the evaporator: 1000kg of dry air/h - The mass flow rate of the air passing through the condenser: 2500kg of dry...
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