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Sanitary, Heating and Ventilation Engineering Volume 3; A General Reference Work

Sanitary, Heating and Ventilation Engineering Volume 3; A General Reference Work


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...Then 250,000 B. T. U. will raise 250,000 X 55 cubic feet of air 1 degree. 250,000 X 55 = 400,000 The air in this case must be raised to 70 + 34 = 104 degrees, to provide for both ventilation and warming. Referring to Table XXX, we find that a heater 12 pipes deep will be required, and that the corresponding efficiency of the heater will be 1,650 B. T. U. Then' 1,650 = 460 square feet of surface required. Efficiency of Cast-iron Heaters. Heaters made up of indirect pin radiators of the usual depth, have an efficiency of at least 1,500 B. T. U., with steam at 10 pounds pressure, and are easily capable of warming air from zero to 80 degrees or over when computed on this basis. The free space between the sections bears such a relation to the heating surface that ample area is provided for the flow of air through the heater, without producing an excessive velocity. The heater shown in Fig. 139 may be counted on for an efficiency at least equal to that of a pipe heater; and in computing the depth, one row of sections may be taken as representing 4 rows of pipe. Pipe Connections. In the heater shown in Fig. 135, all the sections take their supply from a common header, the supply pipe connecting with the top, and the return being taken from the lower division at the end, as shown. In Fig. 137 the base is divided into two parts, one for live steam, and the other for exhaust. The supply pipes connect with the upper compartments, and the drips are taken off as shown. Separate traps should be provided for the two pressures. The connections in Fig. 136 are similar to those just described, except that the supply and return headers, or bases, are drained through separate pipes and traps, there being a slight difference in pressure between the two, which is likely to inter...


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Product Details
  • ISBN-13: 9781130617603
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 88
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1130617602
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 172 gr

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