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Determine the amount of water that can be delivered by a sprinkler head having a 3/4" in orifice with a 13.7 k-factor and installed in an automatic sprinkler system having a 35 psi residual pressure

Determine the amount of water that can be delivered by a sprinkler head having a 3/4" in orifice with a 13.7 k-factor and installed in an automatic sprinkler system having a 35 psi residual pressure

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Determine the amount of water that can be delivered by a sprinkler head having a 3/4" in orifice with a 13.7 k-factor and installed in an automatic sprinkler system having a 35 psi residual pressure.  

   

 

 



 

 
Example 11.1 What is the flow rate of a sprinkler with a standard 1/2-in. orifice (K = 5.5) with 20 psi residual pressure? Solution Flow rate Q = 5.5 x √/20 = 5.5 x 4.47 24.6 GPM Example 11.2 What is the flow rate of a sprinkler with a 3/4-in. orifice (K = 14) with 65 psi? Solution = Flow rate Q = 14 x √√65 = 14 x 8.1 = 112.9 GPM
Transcribed Image Text:Example 11.1 What is the flow rate of a sprinkler with a standard 1/2-in. orifice (K = 5.5) with 20 psi residual pressure? Solution Flow rate Q = 5.5 x √/20 = 5.5 x 4.47 24.6 GPM Example 11.2 What is the flow rate of a sprinkler with a 3/4-in. orifice (K = 14) with 65 psi? Solution = Flow rate Q = 14 x √√65 = 14 x 8.1 = 112.9 GPM
The flow rate of a sprinkler depends on the size of its orifice and the residual pressure of the water supply. The flow rate is calculated from the fundamental fluid flow formula, (11.1) where Q = flow rate, GPM Q = KX √P K = flow constant, per unit; varies from 1.3 to 1.5 for a 1/4-in. orifice, 5.3 to 5.8 for a 1/2-in. orifice, to 13.5 to 14.5 for a ³/4-in. orifice p = pressure, psi (residual pressure at rated flow)
Transcribed Image Text:The flow rate of a sprinkler depends on the size of its orifice and the residual pressure of the water supply. The flow rate is calculated from the fundamental fluid flow formula, (11.1) where Q = flow rate, GPM Q = KX √P K = flow constant, per unit; varies from 1.3 to 1.5 for a 1/4-in. orifice, 5.3 to 5.8 for a 1/2-in. orifice, to 13.5 to 14.5 for a ³/4-in. orifice p = pressure, psi (residual pressure at rated flow)
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