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

3-d stress, If the resultant forces are resolved in the three co-ordinate d...

If the resultant forces are resolved in the three co-ordinate directions and divided by the area of the face of the cube we have the general state of 3-dimensional stress as shown.

Test on complete bearings, Q. Test on complete bearings? Two bearings s...

Q. Test on complete bearings? Two bearings should be selected at random from the 'lot'. Various tests should be conducted on these 'test bearings'. These bearings should be exc

Theorem of three moments, Theorem of three moments: You have been intr...

Theorem of three moments: You have been introduced to the analysis of one of the important class of structures, namely Statically Indeterminate Structures. You have been intro

Define pneumatic tools for underwater inspection of bridge, Define Pneumati...

Define Pneumatic Tools for Underwater Inspection of Bridge? These are more efficient than hand tools and cause less diver fatigue. The disadvantages are that below about 20 m,

What are basic types of elastomeric bearings, Q. What are basic types of el...

Q. What are basic types of elastomeric bearings? Three basic types of elastomeric bearings are used. 1. Plain elastomeric pads 2. Steel reinforced elastomeric pads 3.

Brickwork, write buckling and dislodging of brick slip?

write buckling and dislodging of brick slip?

Structures, Derivation of Moment-Area Method

Derivation of Moment-Area Method

What do you understand by pressure line, What do you understand by Pressure...

What do you understand by Pressure line If we determine the locations of resultant force at various sections of a pre-stressed beam, as in Example, we can draw a curve showing

Non-distortional prestressing, Non-distortional Prestressing Concrete m...

Non-distortional Prestressing Concrete members deflect due to their own self weight. If prestressing force is applied in such a way that these deflections are eliminated due to

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