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Two streams of R-134a flow into a non-insulated diffuser. Stream 1 enters at a pressure of 2 bar and 20?C (State 1) with a velocity of 200 m/s through an area of 0.1 m2 while stream 2 enters as saturated vapor at 2 bar (State 2) with a velocity of 100 m/s through an area of 0.05 m2. R-134a exits the diffuser at 2.8 bar and 40?C (State 3) with a velocity of 20 m/s.
(a) Calculate mass flow rate (kg/s) of the refrigerant at the exit of the diffuser.
(b) Find area (m2) at the exit of the diffuser.
(c) What is the rate of heat transfer (kW) for the diffuser? Is the heat transfer into or out of the diffuser?
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