A room contains air at 20 C and a total pressure of 95 kPa with a...
A room contains air at 20 C and a total pressure of 95 kPa with a relative humidity of 40 percent. The gas constant for air is 0.287 kJ/(kg-K). The mass of dry air in the room is 30 kg. What is the volume of the room in m3 :
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A room contains air at 20 C and a total pressure of 95 kPa with
a...
1. A room in Universiti Malaysia Pahang, Pekan Campus contains atmospheric air at 30°C and 45%...
1. A room in Universiti Malaysia Pahang, Pekan Campus contains atmospheric air at 30°C and 45% of temperature and relative humidity, respectively. Partial pressure of the dry air is 96 kPa with its standard specific heat of 1.005 kJ/kg K. Determine for this air its specific humidity (in kg H2O/kg dry air), and specific enthalpy (in kJ/kg dry air).
The air in a room is at 25 °C and a total pressure of 101.325 kPa...
The air in a room is at 25 °C and a total pressure of 101.325 kPa . Air contains water vapor with a partial pressure of 1.76 kPa. a. Calculate the air humidity and relative humidity. b. Since you intend to use this air for drying fre sh fruits you plan to heat up the air to 50°C. Once you accomplish that, what would be the new relative humidity of the air if the moisture content is maintained? c. Intuitively...
A 2.2-m3 rigid tank initially contains air at 100 kPa and 22°C. The tank is connected...
A 2.2-m3 rigid tank initially contains air at 100 kPa and 22°C. The tank is connected to a supply line through a valve. Air is flowing in the supply line at 600 kPa and 22°C. The valve is opened, and air is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. A thermometer placed in the tank indicates that the air temperature at the final state is...
Please show all work 1 out of 3 attem A tank contains 23.07 kg of dry air and 0.238 kg of water vapor at 30°C and 97 kPa total pressure. Determine (a) the specific humidity kg H2O/kg dry air (Round y...
Please show all work 1 out of 3 attem A tank contains 23.07 kg of dry air and 0.238 kg of water vapor at 30°C and 97 kPa total pressure. Determine (a) the specific humidity kg H2O/kg dry air (Round your answer to four decimal places) (b) the relative humidity, % (Round your answer to one decimal place) and (c) the volume of the tank. 3 m (Round your answer to one decimal place) 1 out of 3 attem A...
9 Air at 20 "C. 100 kPa and a relative humidity of 90% exists in a...
9 Air at 20 "C. 100 kPa and a relative humidity of 90% exists in a room having 3m x 3m x 3m dimensions. Determine 1. the partial pressure (kPa) of dry air II. the specific humidity (g/kEda) III the enthalpy per unit mass of the dry air (ki/kedal (At 30 °C, Psar 4.25 kPa) (For dry air R-0.287) a) (1) 55 (II) 65 (III) 77 b) (0) 3.9 (II) 20.4 (III) 68.5 (1 93 (II) 21.8 (III) 95.2 d...
An air conditioning system operates at a total pressure of 95 kPa and consists of a...
An air conditioning system operates at a total pressure of 95 kPa and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100°C. Air enters the heating section at 10°C and 70 percent relative humidity at a rate of 35 m/min, and it leaves the humidifying section at 20°C and 60 percent relative humidity. Determine (a) the temperature and relative humidity of air when it leaves the heating section, (b) the rate of...
A room contains air at 27C and 101 kPa at a relative humidity of 88 percent....
A room contains air at 27C and 101 kPa at a relative humidity
of 88 percent. determine, using four decimals:
(a) the partial pressure of dry air. Pa (b) the humidity ratio, W. р, о p = Pa + pv 0.622 рр. т. Pete а at T = 27°С, Рg = 3.567 kPa PV = kPa а) Pa = kPa b) =
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A...
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A paddle wheel within the cylinder is rotated until 15 kJ of work is done on the air while the pressure is held constant. Assuming the kinetic and potential energies are negligible and the gas constant and specific heat of air are ? = 0.287 kJ kg∙K and ?? = 1.005 kJ kg∙K . Tasks: ( a ) Determine the mass of air inside the...
A system contains 0.2 m3 of air at a pressure of 400 kPa and 200°C. It...
A system contains 0.2 m3 of air at a pressure of 400 kPa and 200°C. It is expanded polytropically (n=1.2) till the pressure falls to 150 kPa. The air is then heated at constant pressure till its enthalpy increases by 80 kJ. Determine: i. the final volume ii. the total work done
0.20 kg of air at pressure of 113 kPa occupies 0.18 m3 and from this condition...
0.20 kg of air at pressure of 113 kPa occupies 0.18 m3 and from this condition it is compressed to 1237 kPa accordingly to the law P*(V)1.28 = constant. Determine change of internal energy of the air in kJ, Cp=1.005 kJ/kg K Cv=0.718kJ/kg K R=0.287 kJ/kg K
1. A room in Universiti Malaysia Pahang, Pekan Campus contains atmospheric air at 30°C and 45% of temperature and relative humidity, respectively. Partial pressure of the dry air is 96 kPa with its standard specific heat of 1.005 kJ/kg K. Determine for this air its specific humidity (in kg H2O/kg dry air), and specific enthalpy (in kJ/kg dry air).
A 2.2-m3 rigid tank initially contains air at 100 kPa and 22°C. The tank is connected to a supply line through a valve. Air is flowing in the supply line at 600 kPa and 22°C. The valve is opened, and air is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. A thermometer placed in the tank indicates that the air temperature at the final state is...
9 Air at 20 "C. 100 kPa and a relative humidity of 90% exists in a room having 3m x 3m x 3m dimensions. Determine 1. the partial pressure (kPa) of dry air II. the specific humidity (g/kEda) III the enthalpy per unit mass of the dry air (ki/kedal (At 30 °C, Psar 4.25 kPa) (For dry air R-0.287) a) (1) 55 (II) 65 (III) 77 b) (0) 3.9 (II) 20.4 (III) 68.5 (1 93 (II) 21.8 (III) 95.2 d...
An air conditioning system operates at a total pressure of 95 kPa and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100°C. Air enters the heating section at 10°C and 70 percent relative humidity at a rate of 35 m/min, and it leaves the humidifying section at 20°C and 60 percent relative humidity. Determine (a) the temperature and relative humidity of air when it leaves the heating section, (b) the rate of...
A room contains air at 27C and 101 kPa at a relative humidity
of 88 percent. determine, using four decimals:
(a) the partial pressure of dry air. Pa (b) the humidity ratio, W. р, о p = Pa + pv 0.622 рр. т. Pete а at T = 27°С, Рg = 3.567 kPa PV = kPa а) Pa = kPa b) =
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