Question

- A centrifugal pump operating at 1800 rpm with an efficiency of 70% discharges 30 L/s against a 25-m head and requires 10.5 KW, Assuming that the efficiency remains constant, estimate the discharge, head and power if the speed is reduced to 1500 rpm.

Answer #1

A centrifugal pump has an impeller of outer diameter, 20 cm and
outer width,4 cm.
The pump delivers a flow of 30 L/s against a head of 10.5 m at
an operating speed
of 550 rpm. If the hydraulic efficiency of the pump is 85% and
the overall efficiency
is 80%, determine the impeller outlet vane angle and the power
required to run the
pump.

A centrifugal pump delivers water against a net head of 14 m
and a speed of 1300 rpm. The blade angle is given as 35º. The
impeller outlet diameter is 225 mm and outlet width is 50 mm.
Determine the discharge of the pump if manometric efficiency is
83%.

1. A centrifugal pump
running at 2950 rpm under test at peak efficiency gave the
following results: Effective head H= 75m of water, rate of flow Q=
0.05 m3/s, overall efficiency h= 76%.
A dynamically similar pump is to operate at a corresponding
point of its characteristic when delivering 0.5 m3/s
through a pipe 800m long and 1m diameter for which the friction
coefficient f =0.05. The pipe discharges 90m above reservoir level.
Determine the rotational speed at which the...

The
rotation speed of a centrifugal water pump is 1500 rpm, its flow
rate is 15 L / s, the rotor diameter is 0.2 m at the outlet, the
rotor width at the outlet is 0.01 m and the mechanical efficiency
is 0.92. For the fluid entering the rotor in the axial direction,
the wing angle is given as 30o at the outlet. What power should be
given to the shaft of this pump? (ρwater = 1000 kg / m3)

Please answer the following Case
analysis questions
1-How is New Balance performing compared to its primary rivals?
How will the acquisition of Reebok by Adidas impact the structure
of the athletic shoe industry? Is this likely to be favorable or
unfavorable for New Balance?
2- What issues does New Balance management need to address?
3-What recommendations would you make to New Balance Management?
What does New Balance need to do to continue to be successful?
Should management continue to invest...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 3 minutes ago

asked 9 minutes ago

asked 11 minutes ago

asked 14 minutes ago

asked 18 minutes ago

asked 23 minutes ago

asked 45 minutes ago

asked 45 minutes ago

asked 53 minutes ago

asked 59 minutes ago

asked 1 hour ago