Explain the operating point - pumping system, Civil Engineering

Assignment Help:

Explain the Operating Point - Pumping System

Intersection of the characteristic curve and the system curve. This is the head and flow rate data for the pump "operation". The operating point data (h and Q) are used for the Affinity Laws. For example, if one operating point (h1 and Q1) are know, these values may be used to determine operating points along the same system curve but for a smaller or larger impeller diameter or rpm. 

2309_Operating Point.png

The relationship between h and Q2 is a constant (h/Q2) for all plot points along the system curve. The hf equations include v2 and v1.85, which are related to Q2 by the continuity equation. Also, based on the Affinity Laws, 

h2/h1 = (n2/n1)2 = (Q2/Q1)2   OR,   hf1/ hf2 = (Q1/ Q2)2  

Using the constant (h/Q2) for a system curve, operating point values of h or Q can be used to determine the h or Q values at a different operating point on a different characteristic curve (due to changes in rpm or impeller dia.).


Related Discussions:- Explain the operating point - pumping system

Compute the negative skin friction of the pile group, A square pile group o...

A square pile group of 9 piles passes by a recently filled up material of 4.5 m depth. The diameter of the pile is 30 cm and pile spacing is 90 cm centre to centre. If the unconfin

Sewerage, what is the manhole to manhole joining preferences? why it is joi...

what is the manhole to manhole joining preferences? why it is joined crown to cron, not crown to invert?

Determine the active thrust on the wall, A retaining wall 9 m high retains ...

A retaining wall 9 m high retains granular fill weighing 18 kN/m 3 with level surface. The active thrust on the wall is 180 kN per metre length of the wall. The height of the wall

Transportation, investigation of strength properties of black cotton soil s...

investigation of strength properties of black cotton soil stabilised with fly ash and georeinforcement

.., Ask questiPermanent Way:on #Minimum 100 words accepted#

Ask questiPermanent Way:on #Minimum 100 words accepted#

Compression vs tension, Behaviour of struts in compression compared with th...

Behaviour of struts in compression compared with the behaviour of struts in tension? Also do you know a credible source that I can reference?

Concrete technology, why strength of transition zone is less than bulk past...

why strength of transition zone is less than bulk paste

Strenght of meterials 2, Difference between direct and bending stress diagr...

Difference between direct and bending stress diagrams

Explain the inventory inspections - inspection of bridge, Explain the Inven...

Explain the Inventory inspections - Inspection of Bridge? These inspections are normally performed following new construction, modifications, or repair to establish as-built or

Applied physics, Write the principle of reversibility of light.

Write the principle of reversibility of light.

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