Question

A single acting reciprocating pump has a diameter of 0.3 m and stroke of 0.4 m. It takes
its supply of water from the sump 3 m below the pump axis through a pipe 10 m long and
0.2 m diameter. If the separation occurs at 2.5 m of water absolute, find (i) speed at
which separation may take place at the commencement of the suction stroke and (ii)
change in speed of the pump if an air vessel is fitted on the suction side 2.5 m above the
sump water level. Show that by fitting the air vessel, the pump can run at higher
velocity without any chance of separation. Assume f = 0.01 and barometric head = 10.3
m of water.

Answer 1

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Answer 2

Answer:

• In refrigeration and air conditioning systems, the suction pressure' is the intake pressure generated by the system compressor while operating. The suction pressure, along with the suction temperature and the wet bulb temperature of the discharge air are used to determine the correct refrigerant charge in a system.