Steam enters a counterflow heat exchanger operating at steady state at 0.07 MPa with a quality of 0.9 and exits at the same pressureas saturated liquid. The steam mass flow rate is 1.6 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30°Cand exits at 60°C. The ideal gas model with c, = 1.005 kJ/kg-K can be assumed for air. Kinetic and potential energy effects arenegligible.Determine the temperature of the entering steam, in °C.For the overall heat exchanger as the control volume, what is the rate of heat transfer, in kW.Step 1Your answer has been saved. See score details after the due date.Determine the temperature of the entering steam, in °C.T, =90°CAttempts: 1 of 1 usedStep 2For the overall heat exchanger as the control volume, what is the rate of heat transfer, in kW.=ikWSave for LaterAttempts: 0 of 1 usedSubmit Answer

The temperature of the steam at the inlet is equal to the saturation temperature corresponding to…

Answered: Steam enters a counterflow heat…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Steam enters a counterflow heat exchanger operating at steady state at 0.05 MPa with a quality of 0.9 and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.7 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30oC and exits at 60oC. The ideal gas model with cp = 1.005 kJ/kg·K can be assumed for air. Kinetic and potential energy effects are negligible. Determine the temperature of the entering steam, in oC.For the overall heat exchanger as the control volume, what is the rate of heat transfer, in kW.
A well-insulated turbine operating at steady state develops 29.7 MW of power for a steam flowrate of 45 kg/s. The steam enters at 25 bar with a velocity of 48 m/s and exits as a saturated vapor at 0.06 kPa with a velocity of 139 m/s. Neglecting potential energy effects, determine the inlet enthalpy in kJ/kg to the tenths place. I am fairly certain that the base equation is... H1=(Ws/m)+H2+((V2^2-V1^2)/2) ...but I do not know how to get the value of H2?
Steam enters a turbine operating at steady state with a mass flow of 10 kg/min, a specific enthalpy of 3100 kJ/kg, and a velocity of 30 m/s. At the exit, the specific enthalpy is 2300 kJ/kg and the velocity is 45 m/s. The elevation of the inlet is 3 m higher than at the exit. Heat transfer from the turbine to its surroundings occurs at a rate of 1.1 kJ per kg of steam flowing. Let g = 9.81 m/s2. Determine the power developed by the turbine, in kW.
Air enters a diffuser operating at steady state at 750°R, 15 lbf/in.2, with a velocity of 600 ft/s, and exits with a velocity of 60 ft/s. The ratio of the exit area to the inlet area is 8. Assuming the ideal gas model for the air and ignoring heat transfer, determine the temperature, in °R, and pressure, in lbf/in.2, at the exit.
Air enters a diffuser operating at steady state at 540°R, 15 lbf/in.2, with a velocity of 600 ft/s, and exits with a velocity of 60 ft/s. The ratio of the exit area to the inlet area is 6.Assuming the ideal gas model for the air and ignoring heat transfer, determine the temperature, in °R, and pressure, in lbf/in.2, at the exit.
6Air enters a compressor operating at steady state at 14 lbf/in2, 60°F, with a volumetric flow rate of 6800 ft3/min. The compression occurs in two stages, with each stage being a polytropic process with n = 1.27. The air is cooled to 80°F between the stages by an intercooler operating at 45 lbf/in2. Air exits the compressor at 150 lbf/in2. 1)Determine the magnitude of the total power required by the compressor, in Btu/min. 2)The heat rate transfer for the intercooler.
Refrigerant 134a enters an air conditioner compressor at 4 bar, 20 degrees celsius, and is compressed at steady state to 12 bar, 80 degrees celsius. The volumetric flow rate of the refrigerant entering is 5m3/min. The work input to the compressor is 75 KJ per kg of refrigerant flowing. Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in KW.
4. Air enters a compressor operating at steady state at a pressure of 1 bar, a temperature of 290 K, and a velocity of 6 m/s through an inlet with an area of 0.1 m2. At the exit, the pressure is 7 bar, the temperature is 450 K, and the velocity is 2 m/s. Heat transfer from the compressor to its surroundings occurs at a rate of 180 kJ/min. Employing the ideal gas model, calculate the power input to the compressor, in kW.
Air passes through a horizontal duct with steady state conditions. The air enters with parameters 290 K, 1 bar, and a volumetric flow rate of 0.25 m3/s, and exits at 325 K, 0.95 bar. The cross sectional area of the duct is constant at 0.04 m2. Determine the mass flow rate in kg/s
Liquid water flows isothermally at 20°C through a one-inlet, one-exit duct operating at steady state. The duct’s inlet and exit diameters are 0.02 m and 0.07 m, respectively. At the inlet, the velocity is 10 m/s and pressure is 1 bar.At the exit, determine the mass flow rate, in kg/s, and velocity, in m/s. m2 = ? v2 = ?
Air enters a compressor operating at steady state at 14 lbf/in2, 60°F, with a volumetric flow rate of 5600 ft3/min. The compression occurs in two stages, with each stage being a polytropic process with n = 1.27. The air is cooled to 80°F between the stages by an intercooler operating at 45 lbf/in2. Air exits the compressor at 150 lbf/in2. 1. Determine the magnitude of the total power required by the compressor, in Btu/min. 2. Determine the magnitude of the total heat transfer rate for both compressor stages, in Btu/min. 3. Determine the magnitude of the heat transfer rate from the intercooler, in Btu/min.
Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady state to 12 bar, 80°C. The volumetric flow rate of the refrigerant entering is 7 m3/min. The work input to the compressor is 105 kJ per kg of refrigerant flowing.Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in kW.

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