Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 180
velocity of flow (average over the cross-section) in ft. per sec. / = friction coefficient. g = 32.16 (acceleration due to gravity) ft. per sec* F2 — = the velocity head. If the head lost is stated in inches of water, then KK I h = 12 d in which Then h = the head lost measured in inches of water… … Fig. 1. 162 POWER PLANTS AND REFRIGERATION Then , 4 L / F« 12 d\ If it is desired to use the weight of the medium flowing rather than the velocity, the followingsubstitutions may be made in (3) for round ducts: Q = Volume of flue gases, cu. ft. per sec.W = Weight of flue gases, lb. per sec. The…
Building · Heating · Ventilation
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