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s the velocity and fric

s the velocity and fric

Refrigeration and Air Conditioning Technology (MindTap Course List)
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
Chapter50: Commercial, Packaged Rooftop, Variable Refrigerant Flow, And Variable Air Volume Systems
Section: Chapter Questions
Problem 15RQ: Explain why the outside air damper is typically never completely closed, even when the outside air...
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Using the chart in figure 37.88, what is the velocity and friction loss of a 400 company airstream that is flowing through a 9 inch round duct?

Ass00 5000 500 Fpm velocity 4000 3600 -3200 3000 E 2800 2600 2400 OL 2200 2000 A1B00 F1600 7- In. duct diom 1400 1200 1000-N 600 500 3004 30 CU. FT. OF AIR PER MINUTE Fpm velocity 200 ms, up to The lines on chart of Bound duct in inches, Unit 37 Air Distribution and Balance 0.02 0.03004 0.060080I 100 000 2 24 22 000 I 0.2 0.3 04 0,6 0.8 I 20 006 In. duct diam, 008 18 009 1. 000 12 01 06 09 40 2아 10'0 0.02 0.03004 0.06008Q1 Sento 100,000 cfm. The horizontal lines on the chart airflow in cfm, of the chart 818888 02 03 0.4 0.6 0.8 I FRICTION LOSS IN INCHES OF WATER PER 100 FT. as indicated by the scale on the left 34 conditions and has a density of 0.075 lb/ft³. available for ductboard and flexible duct. TI expressed in inches of water column per 10 the scale is shown along the top and bott For example, using this chart, a run of pipe from the bottom-left to re- he chart) can be plotted over
Transcribed Image Text:Ass00 5000 500 Fpm velocity 4000 3600 -3200 3000 E 2800 2600 2400 OL 2200 2000 A1B00 F1600 7- In. duct diom 1400 1200 1000-N 600 500 3004 30 CU. FT. OF AIR PER MINUTE Fpm velocity 200 ms, up to The lines on chart of Bound duct in inches, Unit 37 Air Distribution and Balance 0.02 0.03004 0.060080I 100 000 2 24 22 000 I 0.2 0.3 04 0,6 0.8 I 20 006 In. duct diam, 008 18 009 1. 000 12 01 06 09 40 2아 10'0 0.02 0.03004 0.06008Q1 Sento 100,000 cfm. The horizontal lines on the chart airflow in cfm, of the chart 818888 02 03 0.4 0.6 0.8 I FRICTION LOSS IN INCHES OF WATER PER 100 FT. as indicated by the scale on the left 34 conditions and has a density of 0.075 lb/ft³. available for ductboard and flexible duct. TI expressed in inches of water column per 10 the scale is shown along the top and bott For example, using this chart, a run of pipe from the bottom-left to re- he chart) can be plotted over
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