Carbon dioxide gas (CO2) enters a compressor with a flowrate of 0.1 kg/s at 5ºC, 100...
Carbon dioxide gas (CO2) enters a compressor with a flowrate of 0.1 kg/s at 5ºC, 100 kPa and exits at 125ºC, 500 kPa. Determine the rate of heat loss to the surroundings, in kW, if the compressor requires 12 kW of power to operate. (You will need to be careful to avoid a sign error. Remember that by our sign convention cooling is negative and that power into a system is also negative.)
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Carbon dioxide gas (CO2) enters a compressor with a flowrate of
0.1 kg/s at 5ºC, 100...
Air enters a compressor at 152 kPa and 290 K and exits at a temperature of...
Air enters a compressor at 152 kPa and 290 K and exits at a temperature of 507.4 K. Determine the power (kW) for the compressor if the inlet volumetric flow rate is 0.139 m/s and the heat transfer through the shell of the compressor to the surroundings is 1.31 kW. Use the ideal gas tables (variable specific heats).
Air enters the compressor of a gas-turbine engine at 51 kg/min at 128 kPa and 316...
Air enters the compressor of a gas-turbine engine at 51 kg/min at 128 kPa and 316 K and exits at 722 kPa and 555 K. Heat is lost from the compressor at 13 kJ/kg. Determine the power input (in kW to 1 decimal place) required assuming that kinetic energy can be neglected. Take the specific heat of air to be 1.05 kJ/kg.K.
Air enters a compressor operating at steady state at a pressure of 100 kPa, a temperature...
Air enters a compressor operating at steady state at a pressure of 100 kPa, a temperature of 290 K, and with a mass flow rate of 0.72 kg/s. At the exit, the pressure is 700 kPa and the temperature is 450 K. Heat transfer from the compressor to its surroundings occurs at a rate of 3 kW. Kinetic and potential energy changes can be ignored. Determine the power input to the compressor, in kW. Assume that the air is an...
become friends with it 3. Air enters a compressor at atmospheric conditions of 20°C and 80...
become friends with it 3. Air enters a compressor at atmospheric conditions of 20°C and 80 kPa and exits at 800 kPa and 200 C. Calculate the rate of heat transfer is the power input is 400 kW The air exits at 20 m/s through an exit diameter of 10 cm. Hint Use the exit conditions to calculate the mass flow rate / "mass flux," m, in kg/s. The sign of Q will tell you whether the compressor is gaining...
Problem 2 20) Air enters a compressor operating at steady state at 280 K and exits...
Problem 2 20) Air enters a compressor operating at steady state at 280 K and exits at a higher pressure and a higher temperature of 1020 K. Specitic heat at constant pressure for air is a constant and equal to 1.003 kJkg K. The mass flow rate is 01 kg's. If the compressor consumes electric power 77 kW Neglect kinetic and potential energy effects and assume air is ideal gas. Find (1) The rate of heat transfer between the compressor...
A brayton cycle operates with a gas mixture of 78% nitrogen, 21% oxygen, and 1% carbon...
A brayton cycle operates with a gas mixture of 78% nitrogen, 21% oxygen, and 1% carbon dioxide by volume. The gas mixture enters the isothermal compressor at 100 kPa and 298 K, and exits the compressor at 800 kPa. In the constant pressure heat exchanger, the gas mixture is heated to 1000 K. At the exit of the turbine, the gas mixture is at 400 K. Determine a) the work input to the compressor, b) the heat addition in the...
A centrifugal air compressor used in a gas turbine receives air at 100 kPa and 300...
A centrifugal air compressor used in a gas turbine receives air at 100 kPa and 300 K and discharges it at 400 kPa and 500 K. The velocity of the compressor's outgoing air is 100 m / s. Ignoring the speed at the compressor inlet. Determine the power required to drive the compressor, in kW, if the mass flow is 15 kg / s. Take the Cp of air equal to 1 kJ / (kg K) and assume that there...
Ethane gas (C2H6) is burned with air. The fuel flow rate is 0.1 kg/s and the air flowrate is 2.2 ...
Ethane gas (C2H6) is burned with air. The fuel flow rate is 0.1 kg/s and the air flowrate is 2.2 kg/s. Ethane's enthalpy of formation is -84,680 kJ/kmol. Determine: a. The equivalence ratio b. Ethane's lower heating value by deriving it from enthalpy of formation data. c. The heat release rate, in kw d. The mass fraction of oxygen in the products. e. The mass of CO2 emitted per 1000 hours of operation f. The mass of fuel burned per...
4. Carbon dioxide (CO2) gas at 30C is flowing in a pipeline with diameter 0.1 m...
4. Carbon dioxide (CO2) gas at 30C is flowing in a pipeline with diameter 0.1 m and at a velocity of 50 m/s. Calculate the pressure read by the two mercury manometers when (a) one is connected to the wall and (b) the other is connected to what is called a pitot tube that points against the flow. The barometer reads 762 mm of Hg, g=9.81 m/s2 and hg=13,640 kg/m3. (c) Explain why the pressure at the pitot tube is...
0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits...
0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits at 4 MPa. Calculate the input power required by the pump. Select one: O a. 4 kW O b. -4 kJ/kg O c.4kJ
Air enters a compressor at 152 kPa and 290 K and exits at a temperature of 507.4 K. Determine the power (kW) for the compressor if the inlet volumetric flow rate is 0.139 m/s and the heat transfer through the shell of the compressor to the surroundings is 1.31 kW. Use the ideal gas tables (variable specific heats).
Air enters a compressor operating at steady state at a pressure of 100 kPa, a temperature of 290 K, and with a mass flow rate of 0.72 kg/s. At the exit, the pressure is 700 kPa and the temperature is 450 K. Heat transfer from the compressor to its surroundings occurs at a rate of 3 kW. Kinetic and potential energy changes can be ignored. Determine the power input to the compressor, in kW. Assume that the air is an...
become friends with it 3. Air enters a compressor at atmospheric conditions of 20°C and 80 kPa and exits at 800 kPa and 200 C. Calculate the rate of heat transfer is the power input is 400 kW The air exits at 20 m/s through an exit diameter of 10 cm. Hint Use the exit conditions to calculate the mass flow rate / "mass flux," m, in kg/s. The sign of Q will tell you whether the compressor is gaining...
Problem 2 20) Air enters a compressor operating at steady state at 280 K and exits at a higher pressure and a higher temperature of 1020 K. Specitic heat at constant pressure for air is a constant and equal to 1.003 kJkg K. The mass flow rate is 01 kg's. If the compressor consumes electric power 77 kW Neglect kinetic and potential energy effects and assume air is ideal gas. Find (1) The rate of heat transfer between the compressor...
Ethane gas (C2H6) is burned with air. The fuel flow rate is 0.1 kg/s and the air flowrate is 2.2 kg/s. Ethane's enthalpy of formation is -84,680 kJ/kmol. Determine: a. The equivalence ratio b. Ethane's lower heating value by deriving it from enthalpy of formation data. c. The heat release rate, in kw d. The mass fraction of oxygen in the products. e. The mass of CO2 emitted per 1000 hours of operation f. The mass of fuel burned per...
0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits at 4 MPa. Calculate the input power required by the pump. Select one: O a. 4 kW O b. -4 kJ/kg O c.4kJ
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