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

What is the density index of the natural soil, A sand at a borrow pit is de...

A sand at a borrow pit is determined to have an  in-situ dry unit weight of 18.4 kN/m 3 . Laboratory tests indicate the maximum and  minimum unit weight values of 19.6 kN/m 3 and

Necessity of air voids in bituminous pavement, Q. Necessity of air voids in...

Q. Necessity of air voids in bituminous pavement? If the presence of air voids is too high, it results in an increase of permeability of bituminous pavement. This enables the f

General requirement for civil engineering, Question General requirement for...

Question General requirement for Civil Engineering Works in 1992 Edition, Clause 15.09 details that tying wires for strengthening adjacent to and above Class F4 and F5 closes must

Lintel, what is the classification of lintel

what is the classification of lintel

Maximum shear stress - state of stress, Maximum shear stress - state of str...

Maximum shear stress - state of stress: Consider the state of stress. (a) According to principal stress theory the equivalent stress for this case is simply σ 1 , i.e. 300

Standard mixes of concrete, In some nations such as Britain, specification ...

In some nations such as Britain, specification for concrete doesn'tusually require cube tests for standard mixes of concrete. Quality control of standard mixes in Britain is achiev

Air pollution, chlorosis in plants is caused by

chlorosis in plants is caused by

Bearing pressure on soil nail, Question What is relation of bearing pr...

Question What is relation of bearing pressure on soil nail head to ratio La/Lb, where La is length of soil nail before potential slip circle as Lb is length of soil nail beyo

Calculate snow weight, Snow weight In spatial trusses, Snow load is muc...

Snow weight In spatial trusses, Snow load is much more important than building. As in buildings snow load is only a small proportion of the overall weight of the building, it w

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