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 1.8 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-Kcan 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.

The temperature of the steam corresponds to the saturation temperature at 0.07 MPa pressure. Its…

Answered: Steam enters a counterflow heat…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Refrigerant 134a at p1 = 30 lbf/in2, T1 = 40°F enters a compressor operating at steady state with a mass flow rate of 350 Ib/h and exits as saturated vapor at p2 = 16O Ib/in?. Heat transfer occurs from the compressor to its surroundings, which are at To = 40°F. Changes in kinetic and potential energy can be ignored. The power input to the compressor is 3.5 hp. Determine the heat transfer rate for the compressor, in Btu/hr, and the entropy production rate for the compressor, in Btu/hr.°R.
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9. thermodynamics
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 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 30°C and 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 are negligible. 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.
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.
6.14

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