A manual of heating and ventilation, in their practical application, for the use of engineers and architectsEmbracing a series of tables and formulas for dimensions of heating flow and return pipes, for steam and hot water boilers, flues, etc., etc . s IIOO 3-177 162 1200 3-381 172 1500 3-993 182 1800 192 2000 202 1-347 2200 212 1-367 2500 230 °-°57S 2800 250 °-0SS9 3000 7-051 HEATING. 45 HEATING WITH HOT WATER. GENERA
A manual of heating and ventilation, in their practical application, for the use of engineers and architectsEmbracing a series of tables and formulas for dimensions of heating flow and return pipes, for steam and hot water boilers, flues, etc., etc . s IIOO 3-177 162 1200 3-381 172 1500 3-993 182 1800 192 2000 202 1-347 2200 212 1-367 2500 230 °-°57S 2800 250 °-0SS9 3000 7-051 HEATING. 45 HEATING WITH HOT WATER. GENERAL PRINCIPLES. In a hot water apparatus, the temperature of the water inthe boiler never exceeds 212°, the mean temperature in theheating pipes being from 150 to 200°; the temperature in pipesis increased or dimiinished by stop cocks, for controlling thevelocity or volume of water passing through the pipes in a giv-en time. Air vents or cocks must be provided, as water evolves airwhen its temperature rises to the boiling point. The air col-lects at the highest points of the apparatus, and at places wherethe horizontal flow pipe dips, and where the risers in the re-turn pipe connect with the horizontal, for instance at pointsa, in Fig. The higher the ascending and descending pipes, or thegreater the difference between their temperature, the more rapidwill be the circulation. To increase the difference of temperature between the as-cending and descending pipes, either increase the quantity ofpipe, so that the water will flow a greater distance, or decreasethe diameter, so that they will part with more heat. Thespecific gravity in pipe li (Fig. 21), must be greater than in pipeh„ to produce circulation; the greater amount of cooling should 46 HEATING AND VENTILATION. Flow pipe
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectventila, bookyear1901
