Mechanical Contracting & Plumbing January-December 1912 . and vents wereclosed, the steam was turned on and theradiator drained to the water-line in thegage-glass. The radiator was given suf-ficient time as before to reach its normalcondition, by reason of the air and ironheating up, when records of the pressure,temperature, etc., were kept for a runof three or four hours. In this way the efficiency of radiatorsunder these conditions was obtained andplotted as shown on the diagram. Thetemperature of the water of condensa-tion seemed to serve as an indication ofthe percentage of air-removal, i
Mechanical Contracting & Plumbing January-December 1912 . and vents wereclosed, the steam was turned on and theradiator drained to the water-line in thegage-glass. The radiator was given suf-ficient time as before to reach its normalcondition, by reason of the air and ironheating up, when records of the pressure,temperature, etc., were kept for a runof three or four hours. In this way the efficiency of radiatorsunder these conditions was obtained andplotted as shown on the diagram. Thetemperature of the water of condensa-tion seemed to serve as an indication ofthe percentage of air-removal, i Thistemperature has also been plotted asshown. In the third branch of the subject,which had to do with the percentage ofair usually removed from a steam radi-ator, the apparatus was arranged as;shown in Fig. 2. The bottle B wasfilled with an amount of water whichrepresented the capacity of the radiatorand the piping from the inlet valve tothe water line in the gage-glass. Steamwas turned on the radiator and the airallowed to escape through the automatic. - TO 3 35 B 3d~Percent of Air m Radiator the side opposite the air valve, the re-moval was somewhat higher than if itwent up the air-valve side. It seemedusually to go up the side on which theair-valve was placed, due probably to theslight current of air created up that sideof the loop by reason of the air valvedischarge. So far as these tests were carried theyseemed to indicate a removal of from 90to 95 per cent, of air, though this is inall probability somewhat greater thanthe normal air-removal. Some observations were made upontwo other methods of checking air-re-moval; one by observing the temperatureof the water of condensation from theradiator and comparing it with the tem-perature obtained from tests with knownpercentages of air-removal, in the caseof the hot-water radiator, the other by-observing the weight of condensationand comparing that with the hot radi-ator tests. These observations, however,wer
Size: 1436px × 1740px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectplumbin, bookyear1912
