Transactions of the American Society of Heating and Ventilating Engineers Volume N . 4

Transactions of the American Society of Heating and Ventilating Engineers Volume N . 4

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ...and it is believed that if the back vent flues were closed and the front ones connected to the space beneath the seats, a better disposition of these currents would result, and it would be possible to eliminate the disagreeable conditions mentioned. In this case the openings to the ventilation flues would be placed in the risers back of the seats on the different levels. A study of the figures on the diagram shows how soon the velocity of the entering air is reduced after passing into the room, due partly to overcoming the resistance, but mainly to expansion. Thus, air entering with a velocity of 550 feet per minute moves at a rate of 210 feet per minute after traversing a distance of ten feet, and with a velocity of 90 feet per minute in a further distance of ten feet; from this point its velocity was too slow for accurate-measuremerit, although, as pointed out, the principal motion is evidently confined to fixed courses, and certain portions of the room are occupied by still air unaffected by the motion of that passing in and out. It is believed, however, that a better disposition could be made by exhausting the air in risers of the platforms and bringing the entire supply in from two points. Distribution Of Air Currents And Temperature In Room No. 8.--This room is on the second floor; is 20% by 24 by 12 feet and contains 5,904 cubic feet of space. It is supplied through a register, 12 by 20 inches, situated 9 feet from the floor and in the center of one side. The air is removed through a vent register, 10 by 20 inches, situated near the floor line and on the same side as the heat register. (See floor plan, page 6.) A plan and two elevations of the room are shown in Fig. 28. The temperature was determined by thermometers located in..show more

Product details

  • Paperback
  • 189 x 246 x 5mm | 195g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236781740
  • 9781236781741