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Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300 kPa, and a...

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Mechanical Engineering

Refrigerant 134a enters a horizontal pipe operating at steadystate at 40°C, 300 kPa, and a velocity of 25 m/s. At the exit, thetemperature is 70°C and the pressure is 240 kPa. The pipe diameteris 0.01 m. Determine: (a) the mass flow rate of the refrigerant, inkg/s, (b) the velocity at the exit, in m/s, and (c) the rate ofheat transfer between the pipe and its surroundings, in kW.

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