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

Designing sewer pipes, Question While designing sewer pipes , why vitr...

Question While designing sewer pipes , why vitrified clay pipes commonly is used for pipe size less than 600mm still as precast concrete pipes with PVC lining is used for pipe

Explain the driver expectancy, Explain the Driver Expectancy A fundamen...

Explain the Driver Expectancy A fundamental component of driver information processing and perception. Drivers operate with a set of expectancies, e.g.: 1) Freeway exits wil

Soil classification - road materials, Soil Classification: Based on p...

Soil Classification: Based on particle size, the soils can be classified as under, adopting the IS soil classification system: 0.002   0.075   0.425   2.36     4.75

Mohrs circle, The state of stress at a point is given through the stress co...

The state of stress at a point is given through the stress components sx = 70 MPa, sy = 10 MPa, and txy = - 40 MPa. Using Mohr''s circle find (i) Principal stresses, and (ii) Princ

Vibrocoring in marine ground investigation, Vibrocoring in marine ground in...

Vibrocoring in marine ground investigation If only shallow marine ground geotechnical information is essential for design purpose, vibrocoring is certainly a good choice for s

Importance of general and subsidiary rules, Q. What is the importance of Ge...

Q. What is the importance of General and subsidiary rules. What is the main differences between the two. Ans.- Importance of General and subsidiary  rules - General and su

Determine the required stirrup size and spacing requirement, A rectangular ...

A rectangular concrete beam is subjected to a factored design shear force of 200 kips.  For the beam shown below, determine the required stirrup size and spacing requirement. H = 3

Determine the density index of the sand sample, An undisturbed sample of sa...

An undisturbed sample of sand has a dry weight of 18.9 N and a volume of 1143 cm 3 . The solids have a specific gravity of 2.72. Laboratory tests indicate void ratios of 0.40 and 0

Determine a cylindrical specimen of saturated clay, A cylindrical specimen ...

A cylindrical specimen of saturated clay, 4.5 cm in diameter, and 9 cm long, is tested in an unconfined compression apparatus. Search the cohesion if the specimen fails at an ax

Calculate the percent grade of line, 1. The topography of a local valley is...

1. The topography of a local valley is shown. The horizontal distance between point P and Q is 11,456-ft. The percent grade (%) of line P-Q .     2. Based on the info

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