Water at 20°C (?=998.3kg/m3 ??? v =1×10−6?2/?) flows through a galvanised iron pipe (? = 0.15 ??) with a diameter of 20 mm, entering the room at point A and discharging at point C from the fully opened gate valve B at a volumetric flow rate of 0.003 m3/s. Determine the required pressure at A, considering all the losses that occur in the system described in Figure Q1. Loss coefficients for pipe fittings have been provided in Table 1. L1 = 4 L2 = 1 L3 = 2.66 L4 = 1.34 L5 = 0.5 L6 = 1 Table of Loss Coeffcients Loss Coeffcients KL Gate Valve - Fully Open 0.19 90° Bend 0.9 45° Bend 0.4

Water at 20°C (?=998.3kg/m3 ??? v =1×10−6?2/?) flows through a galvanised iron pipe (? = 0.15 ??) with a diameter of 20 mm, entering the room at point A and discharging at point C from the fully opened gate valve B at a volumetric flow rate of 0.003 m3/s. Determine the required pressure at A, considering all the losses that occur in the system described in Figure Q1. Loss coefficients for pipe fittings have been provided in Table 1. L1 = 4 L2 = 1 L3 = 2.66 L4 = 1.34 L5 = 0.5 L6 = 1 Table of Loss Coeffcients Loss Coeffcients KL Gate Valve - Fully Open 0.19 90° Bend 0.9 45° Bend 0.4

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter37: Air Distribution And Balance

Section: Chapter Questions

Problem 6RQ: Pressure in ductwork is expressed in which of the following? A. Inches of water column B. Psig C....

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Loss Coeffcients	K_L
Gate Valve - Fully Open	0.19
90° Bend	0.9
45° Bend	0.4
Tee for Valve along Branch	1.8