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

Defaults for precast concrete pipes made by spinning, Q. Defaults for preca...

Q. Defaults for precast concrete pipes made by spinning? Small diameter precast concrete pipes are generally manufactured by spinning method. The spinning method fundamentally

Explain the allowable strength design (asd), Allowable Strength Design (ASD...

Allowable Strength Design (ASD) Process: - Apply service loads with no load factors - Assume linear elastic analysis of structure - Calculated stresses shall not excee

Pure bending, What are the assumptions made in the theory of pure bending

What are the assumptions made in the theory of pure bending

Surveying, What is fore bearing and back bearing?how it measure?

What is fore bearing and back bearing?how it measure?

Cement Sand Plaster, How to use plaster cement in sand?  Cement sand pl...

How to use plaster cement in sand?  Cement sand plaster is a layer of cement & sand mortar that is applied over walls made of brickwork, cement block work, RCC walls and RCC co

Define underwater inspection methods - inspection of bridge, Define Underwa...

Define Underwater inspection methods - inspection of bridge? Method for underwater inspection of a bridge depends on type and extent of damage expected, inspection intensity le

Hill roads, functions of breast wall& scupper

functions of breast wall& scupper

Theory on the horizontal reactions of portal frames, Determine the horizont...

Determine the horizontal abutment reaction of a rectangular portal frame under increasing central concentrated load

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