The term Steady State refers to a system in which flows of mass, heat, and work of a system do not change over time. A Venturi Meter is a steady state device that measures the flow rate of a liquid by producing a pressure drop. The pressure drop can be measured using a manometer; however, this pressure is produced by significantly reducing the diameter of a pipe, causing the velocity of the fluid to increase. (In other words, at steady state the increase in velocity produces a decrease in pressure.) Using the figure below, suppose that the flow rate of liquid water, Q, is 800 gpm (gallons per minute). If D1 = 12 in, what is the velocity (ft/s) of the water before it enters the venturi?     2. Would you recommend a venturi diameter (D2) of 0.15 in? (A simple yes/no will not suffice.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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The term Steady State refers to a system in which flows of mass, heat, and work of a system do not change over time. A Venturi Meter is a steady state device that measures the flow rate of a liquid by producing a pressure drop. The pressure drop can be measured using a manometer; however, this pressure is produced by significantly reducing the diameter of a pipe, causing the velocity of the fluid to increase. (In other words, at steady state the increase in velocity produces a decrease in pressure.) Using the figure below, suppose that the flow rate of liquid water, Q, is 800 gpm (gallons per minute).

  1. If D1 = 12 in, what is the velocity (ft/s) of the water before it enters the venturi?

    2. Would you recommend a venturi diameter (D2) of 0.15 in? (A simple yes/no will not suffice. 

pressure taps
P2
D1
d
D
D2
Venturi Meter Parameters
Transcribed Image Text:pressure taps P2 D1 d D D2 Venturi Meter Parameters
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