Calculate the net positive suction head, Mechanical Engineering

Assignment Help:

A pump station has been designed to lift water out of a 6 metre deep pit (vented to atmosphere) via a centrifigual pump mounted at ground level.

                   Liquid conditions                                     20 OC

                   Suction pipe work losses                        2.0 metres

                   NPSH safety factor                                5.0 kPa

                   Vapor pressure @ 20oC                         0.25 metres

Calculate the Net Positive Suction Head (NPSH available) for the system ?

In summer the liquid temperature rises to 60 oC, this changes the water vapor pressure to 2.05 metres. What is the revised NPSH available for the higher water temperature ?

Pressure loss in the suction pipe work is directly proportional to water veloicty in the pipe work squared, which is inversely proportional to suction pipe work diameter squared. For the NPSHavailable result from part (b) what increase in suction pipework size is required to have a positive NPSH available result as calculated in part (a).


Related Discussions:- Calculate the net positive suction head

Define application of drilling machine, Application of Drilling machine ...

Application of Drilling machine Drilling machines of dissimilar capacity and configuration are basically used for originating cylindrical holes and occasionally for enlarging t

Components of steam power plant, Component s of Steam Power Plant: Th...

Component s of Steam Power Plant: There are four components of steam power plant: 1. The boiler: Hot-source reservoir in which the combustion gases raise steam. 2. Engi

Design of a filament winding machine, How can I achieve a back and forth mo...

How can I achieve a back and forth movement of carriage system. How can I reverse the motor to go back and forth.

Determine the spring force, A double shoe brake as shown in the figure is c...

A double shoe brake as shown in the figure is capable of absorbing a torque of 1400 N-m. The diameter of the brake drum is 350mm and the angle of contact of each shoe is 100°. If t

Determine forces in members of cantilever truss, Determine  forces in memb...

Determine  forces in members of cantilever truss: Determine  forces  in  members   B C   and  BD   of   cantilever truss  shown  in  the figure in the figure given below.

Tension in the string and acceleration of body, Tension in the string and a...

Tension in the string and acceleration of body: The two bodies weighing 300N and 450N are hung to two ends of the rope passing over an ideal pulley as shown in the figure giv

Components vs. Parts, What is the difference between a mechanical component...

What is the difference between a mechanical component and a mechanical part?

What is a special feature of the pdes, A special feature of the PDES A ...

A special feature of the PDES A special feature of the PDES development is the use of the formal language EXPRESS for modeling the product information. There will be capabiliti

Necessity of cooling system , Necessity of Cooling System To preve...

Necessity of Cooling System To prevent the engine from excessive heating. To avoid the piston seizure due to thermal expansion. To prevent burning of lubricant a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd