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in Physics by (63.3k points)

A jet-ejector pump, shown schematically  is a device in which a low-pressure (secondary) fluid is compressed by entrainment in a high-velocity (primary) fluid stream. The compression results from the deceleration in a diffuser. For purposes of analysis this can be considered as equivalent to the turbine-compressor unit  with the states 1, 3, and 5 corresponding to those. Consider a steam jet-pump with state 1 as saturated vapor at 35 kPa; state 3 is 300 kPa, 150°C; and the discharge pressure, P5, is 100 kPa.

a.  Calculate the ideal mass flow ratio, 

b.  The efficiency of a jet pump is defined as 

ideal for the same inlet conditions and discharge pressure. Determine the discharge temperature of the jet pump if its efficiency is 10%. 

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b) real processes with jet pump eff. = 0.10 

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