It is required to find the theoretical volume of air at 20°C and 100 kPa absolute...
It is required to find the theoretical volume of air at 20°C and 100 kPa absolute pressure to bum one kilogram of Franklin County coal. The ultimate analysis of coal as-fired is as follows: C = 65.65 %; O = 18.61%; M = 3%H = 5.87%; S = 1.51%; Ash = 5.36%
Homework Answers
The theoretical volume of air required to burn 1kg franklin coubty coal is 6.106 m3
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It is required to find the theoretical volume of air at 20°C and
100 kPa absolute...
At sea level, water boils at 100 °C, and the absolute atmospheric pressure is 101 kPa....
At sea level, water boils at 100 °C, and the absolute atmospheric pressure is 101 kPa. As the atmospheric pressure above water decreases, the temperature required for boiling also decreases, at a rate of 3.1 kPa per "C. For the system shown below: a. What is the absolute atmospheric pressure at an elevation of 4100 m, assuming a constant unit weight of air of 11.80 N/m3? b. What will be the boiling temperature for water at this elevation? Elev. =...
An ideal Brayton power generation cycle draws in air at 100 kPa and 20 °C. The...
An ideal Brayton power generation cycle draws in air at 100 kPa and 20 °C. The compressor increases the pressure to 500 kPa. The burner adds heat equal to 500 kJ/kg. You can use air standard analysis and assume constant specific heats. (a) (5 pts) find the temperature after the compressor (b) (5 pts) find the specific compressor work (c) (5 pts) find the temperature after the burner (d) (5 pts) find the turbine work (e) (5 pts) find the...
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature...
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature 25°C There. It is applied to the tank feed line by a valve. Pressure of air flowing through the supply line 600 kPa and temperature is 25°C. By opening the valve, the pressure of the air in the tank is air entering the tank until it is equal to the pressure of the air It is closed. A thermometer placed in the tank lasts...
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...
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 :
6) (1 Opts) The pipe shown in the figure transports air at a temperature of 20 degrees C having an absolute pressure o...
6) (1 Opts) The pipe shown in the figure transports air at a temperature of 20 degrees C having an absolute pressure of 30kPa and a speed of 550m/s measured just behind a standing shock wave. Determine the temperatur pressure, and speed of the air just in front of the shock e, wave. 550 m/s V Вас P130 kPa 1 20°C
6) (1 Opts) The pipe shown in the figure transports air at a temperature of 20 degrees C having...
An adiabatic air compressor compresses 100 L/S of air at 120 kPa and 20°C to 1000...
An adiabatic air compressor compresses 100 L/S of air at 120 kPa and 20°C to 1000 kPa and 300°C. Determine (a) the work required by the compressor, in kJ/kg, and (b) the power required to drive the air compressor, in kW.
Given: Air at 20 C and 100 kPa enters the first stage, and it exits the third stage at 6400 kPa. ...
Given: Air at 20 C and 100 kPa enters the first stage, and it exits the third stage at 6400 kPa. An inter-cooler is used to cool the air between the stages back to 20°C. The compression work per unit mass of air is γ-1 where γ is the specific heat ratio, R is the gas constant, subscript "i" denotes the initial (atmospheric) conditions, and subscript "o" signifies the exiting conditions. Find: intermediate pressures so that the total work is...
(20%) Q2. A piston-cylinder assembly initially has 100 kPa pressure and 2 liters of air at...
(20%) Q2. A piston-cylinder assembly initially has 100 kPa pressure and 2 liters of air at 25°C. The air is then compressed to 600 kPa pressure and 150°C temperature. Useful work input for compression is 1.2 kJ. Assuming that the ambient pressure and temperature are 100 kPa and 25°C respectively, calculate a) the exergy of the air in the first and last states, b) the minimum work required for the compression process, c) the second law efficiency of the state...
03 4: Air from the surrounding atmosphere at 100 kPa, 20 °C, enters a compressor with...
03 4: Air from the surrounding atmosphere at 100 kPa, 20 °C, enters a compressor with a velocity of 8.6 m/s through an inlet whose diameter is 36 cm. The compressed air exits at 650 kPa, 225 °C, with a velocity of 2.8 m/s. The rate of entropy generation for the compressor is 0.062 kW/K Determine the power input to the compressor, kW.
At sea level, water boils at 100 °C, and the absolute atmospheric pressure is 101 kPa. As the atmospheric pressure above water decreases, the temperature required for boiling also decreases, at a rate of 3.1 kPa per "C. For the system shown below: a. What is the absolute atmospheric pressure at an elevation of 4100 m, assuming a constant unit weight of air of 11.80 N/m3? b. What will be the boiling temperature for water at this elevation? Elev. =...
An ideal Brayton power generation cycle draws in air at 100 kPa and 20 °C. The compressor increases the pressure to 500 kPa. The burner adds heat equal to 500 kJ/kg. You can use air standard analysis and assume constant specific heats. (a) (5 pts) find the temperature after the compressor (b) (5 pts) find the specific compressor work (c) (5 pts) find the temperature after the burner (d) (5 pts) find the turbine work (e) (5 pts) find the...
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature 25°C There. It is applied to the tank feed line by a valve. Pressure of air flowing through the supply line 600 kPa and temperature is 25°C. By opening the valve, the pressure of the air in the tank is air entering the tank until it is equal to the pressure of the air It is closed. A thermometer placed in the tank lasts...
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...
6) (1 Opts) The pipe shown in the figure transports air at a temperature of 20 degrees C having an absolute pressure of 30kPa and a speed of 550m/s measured just behind a standing shock wave. Determine the temperatur pressure, and speed of the air just in front of the shock e, wave. 550 m/s V Вас P130 kPa 1 20°C
6) (1 Opts) The pipe shown in the figure transports air at a temperature of 20 degrees C having...
Given: Air at 20 C and 100 kPa enters the first stage, and it exits the third stage at 6400 kPa. An inter-cooler is used to cool the air between the stages back to 20°C. The compression work per unit mass of air is γ-1 where γ is the specific heat ratio, R is the gas constant, subscript "i" denotes the initial (atmospheric) conditions, and subscript "o" signifies the exiting conditions. Find: intermediate pressures so that the total work is...
(20%) Q2. A piston-cylinder assembly initially has 100 kPa pressure and 2 liters of air at 25°C. The air is then compressed to 600 kPa pressure and 150°C temperature. Useful work input for compression is 1.2 kJ. Assuming that the ambient pressure and temperature are 100 kPa and 25°C respectively, calculate a) the exergy of the air in the first and last states, b) the minimum work required for the compression process, c) the second law efficiency of the state...
03 4: Air from the surrounding atmosphere at 100 kPa, 20 °C, enters a compressor with a velocity of 8.6 m/s through an inlet whose diameter is 36 cm. The compressed air exits at 650 kPa, 225 °C, with a velocity of 2.8 m/s. The rate of entropy generation for the compressor is 0.062 kW/K Determine the power input to the compressor, kW.
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