Heating, ventilating, plumbingAmerican School of Correspondence, 1903 |
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air supply air valves angle valve arrangement automatic B. T. U. per hour boiler bottom bowl building burner carried cast iron chamber check valve circulation closed coil cold air computing condensation cubic feet degrees diameter diaphragm direct radiation discharge drain drip drop ducts efficiency electric engine exhaust steam expansion tank feet of air fixtures floor flow flushing furnace gallons give given heat loss heating surface heating system height hot water indirect inlet joints live steam lower method mixing damper outlet Pipe Connections placed pounds pump quantity radiating surface regulated riser sections service pipe sewage sewer shown in Fig shows sizes smoke pipe smoke test soil pipe square feet square foot square inch steam heating steam pressure trap usually velocity vent pipe ventilation walls warm air waste pipe water hammer water line water-back wrought iron
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Сторінка 21 - Fig. 38. Fig. 39. Fig. 40. Fig. 41. Fig. 42. Fig. 43. Fig. 44. Fig. 45. Fig. 46. Fig. 47. Fig. 48. Fig. 49. Fig. 50. Fig. 51. Fig. 52. Fig. 53. Fig. 54. Fig. 55. Fig. 56. Fig. 57. Fig. 58. Fig. 59. Fig. 60. Fig. 61. Fig. 62.
Сторінка 72 - The size of the largest riser should usually be limited to 2^ inches in school and dwelling-house work, unless it is a special pipe carried up in a concealed position. If the length of riser is short between the lowest radiator and the main, a higher velocity of 20 feet or more may be allowed through this portion, rather than make the pipe excessively large.
Сторінка 28 - ... more heat shall be supplied to some than to others. Rooms that are on the south si.de of the building and exposed to the sun may perhaps be kept perfectly comfortable with a supply of heat that will maintain a temperature...
Сторінка 19 - Fig. 75 may be used as a guide, with modifications to suit any special case. The ends of all supply mains should be dripped, and the horizontal returns should be sealed if possible. Pipe Sizes. The tables already given for the proportioning of pipe sizes can be used for indirect systems. The following table has been computed for an efficiency of 640 BTU per square foot of surface per hour, which corresponds to a condensation of f of a pound of steam.
Сторінка 45 - An engine does not deliver steam continuously, but at regular intervals, at the end of each stroke; and the amount is likely to vary with the work done, since the governor is adjusted to admit steam in such a quantity as is required to maintain a uniform speed. If the work is light, very little steam will be admitted to the engine; and for this reason the supply available for heating may vary somewhat, depending upon the use made of the power delivered by the engine. In mills the amount of exhaust...
Сторінка 17 - The vent flues are usually gathered together in the attic, and a single damper may be used to shut off the whole number at once. Flat or round wire gratings of open pattern are often used in place of Fig.
Сторінка 38 - ... being pushed too far into the flue. Where the pipe is of unusual length, it is well to cover it to prevent loss of heat and the condensation of smoke. Chimney Flues. Chimney flues, if built of brick, should have walls 8 inches in thickness, unless terra-cotta linings are used, when only 4 inches of brickwork is required.
Сторінка 32 - A single riser is carried directly to the expansion tank, from which branches are taken to supply the various drops to which the radiators are connected. An important advantage in connection with this system is that the air rises at once to thejexpansion tank, and escapes through the vent, so that air-valves are not required on the radiators. Secgrid rio Flo Heater Tl Fig. 90. "Overhead" Distribution System of Hot-Water Piping.
Сторінка 33 - Fig. 90 we assume the water to leave at 180 degrees and return at 160, we shall have a drop in temperature of 10 degrees on each floor; that is, the water will enter the radiator on the second floor at 180 degrees and leave it at 170, and will enter the radiator on the first floor at 170 and leave it at 160.
Сторінка 44 - Should the water in any of the radiators fail to circulate, see that the valves are wide open and that the radiator is free from air. Water must always be added at the expansion tank when for any reason it is drawn from the system. The required temperature of the water will depend upon the outside conditions, and only enough fire should be carried to keep the rooms comfortably warm. Thermometers should be placed in the flow and return pipes near the heater, as a guide. Special forms are made for...