Thermodynamic

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unzrqna20

Engineering

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please see the attached files and answer them. there are only three questions for this one. this program is so accurate about the answer. I tried many times and I couldn't and that's why a posted it. thanks!

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Problem 4.029 x Your answer is incorrect. Try again. Air expands through a turbine operating at steady state. At the inlet, p1 = 150 lbf/in.?, T1 = 1400°R, and at the exit, p2 = 14.8 lbf/in.?, T2 = 800°R. The mass flow rate of air entering the turbine is 5 lb/s, and 65,000 Btu/h of energy is rejected by heat transfer. Neglecting kinetic and potential energy effects, determine the power developed, in hp. x 4925.3 W cv hp the tolerance is +/-2% Problem 4.037 SI x Your answer is incorrect. Try again. Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 57 m/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 9.5 kW from the compressor to its surroundings. Assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the magnitude of the power input, in kW. Wer -125.35 = kW the tolerance is +/-2% Problem 4.067 SI The figure below provides steady-state data for a throttling valve in series with a heat exchanger. Saturated liquid Refrigerant 134a enters the valve at a pressure of 9 bar and is throttled to a pressure of pz = 1 bar. The refrigerant then enters the heat exchanger, exiting at a temperature of 10°C with no significant decrease in pressure. In a separate stream, liquid water at 1 bar enters the heat exchanger at a temperature of 25°C with a mass flow rate of 4 = 4 kg/s and exits at 1 bar as liquid at a temperature of 15°C. Stray heat transfer and kinetic and potential energy effects can be ignored. Heat exchanger 3 P3 = P2 Saturated liquid R-134a at Pi = 9 bar Tz = 10°C Valve P2 two www 5 -4 M4N T3 = 15°C P5 = P4 Water T4 = 25°C P4 = 1 bar Determine: (a) the temperature, in °C, of the refrigerant at the exit of the valve. (b) the mass flow rate of the refrigerant, in kg/s.
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Running head: THERMODYNAMIC ENGINEERING

Thermodynamic
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THERMODYNAMIC ENGINEERING
PROBLEM 4.029
Air expands through a turbine operating at steady state. At the inlet, p1 = 150 ibf/in.2, T1= 1400R,
and at the exit, p2 = 14.8 ibf/in.2, T2= 1400R. The mass flow rate of air Btu/h of energy is rejected
by heat transfer.
Neglecting kinetic and potential energy effects, determine the power de...


Anonymous
Just what I needed…Fantastic!

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