Handbook for heating and ventilating engineers . lenum System, and is given special considerationin Chapters X to XII. 65. A second classification of steam and hot water sys-tems is made according to the method of pipe connectionbetween the heat generator and the radiation. That knownas the one-pipe system, Fig. 33, is the simplest in construc-tion and is preferred by many for the steam the name indicates, its distinguishing feature is thesingle pipe leading from the source of heat to the radiator,the steam and the returning condensation both using thispath. In the risers and
Handbook for heating and ventilating engineers . lenum System, and is given special considerationin Chapters X to XII. 65. A second classification of steam and hot water sys-tems is made according to the method of pipe connectionbetween the heat generator and the radiation. That knownas the one-pipe system, Fig. 33, is the simplest in construc-tion and is preferred by many for the steam the name indicates, its distinguishing feature is thesingle pipe leading from the source of heat to the radiator,the steam and the returning condensation both using thispath. In the risers and connections, the steam and ton-densation flow in opposite directions, thus requiring largerpipes than where a flow and a return are both this system the condensation usually flows with thesteam in the main, and not against it, until it reaches sucha point that it may be dripped to a separate returnand then led to the boiler. In the so-called one-pipehot water system, radiators have two tappings and two HOT WATEK AND STEAM HEATING 89. Fig. , but the flow riser is tapped out of the top of thesingle basement main, while the return riser is tapped intothe bottom of that same main by either of the special fit-tings shown in section in Fig. 34. The theory is that thehot water from the boiler travelsalong the top of the horizontal base-ment main, while the cooler water fromthe radiators travels along the bottomof this same main. Hence the neces-sity for tapping flow risers out of thetop and return risers into the bottomof this main, thus avoiding a mixingof the two streams. Where mains areshort and straight as in the smallerFig, 34. residence installations, this system
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventila, bookyear1913
