Document 5LdQpajXN9YnmD6Y8eyDnbXqR

\ ;|1 REVIEWED THIS MOHTHi DIESELS Centrifugal Blvn lor Two-Cycle Engines HYDRO POWER Flood Contra! and fewer In Soulhwest Sediment Transpertotien in StreotM in Belo- tion to Powcr-Ncnf Operation STEAM POWER Steam Power Plant Appraisal Package Steam Units OPERATOR TRAINING Training Operating Engineers Training Power-Plant Personnel A Training Program lor Castodions Boiler Operators and For Complete Texts Material in these briefs comet from one of three sources:. Midwett Pdwer Conference, Tenth an nual meetinf, Chicago. April 7-9, 1948. Papers identified by Initials MPC. Avail able in Volame X, Proceedings of Mid west Power Conference, 1948, IS, through Stanton E Wtniton, Conference Director, lllinoil Institute of Technology, 5500 Fed eral St, Chicago Id. American Society of Mecktnicel Engi neers, Oil ond Cat Power Dtv meeting, St. Louis, May 22-24, 1948. Paper* are identified by initials ASMB and paper No. Available while supply lasts at ASME, 29 W 39ih St, New York. OU f/eos fnsiitute of America, Inc, New York, N. Y. Annas! meeting, Chicago. April 5-8, 1948. Paper* ere identified by initials Olll. Only copies are ones made available to those in attendance at the annual meeting. Voltage regulator __ field rheettof -- CENTRIFUGAL SCAVENGING BLOWER li oleclricolly connect,.! 10 l otnctoOTifj storting with the englno. Pilot excltotlon, usually from battery, speeds lTof-?9 DIESEL ENGINES Centrifugal Blowers for Two-Cycle Diesel Engine* by Robert Cramer Jr, Nordberg Mfg. Co. Diaeutting various means currently employed for scaveng ing 2-cycle diesels, the outhor tabulates blower, drive and combined efficiency of each, showing the Roots positivedisplacement blower, gear-driven from the engine crankshaft, to be most effi cient. In spite of this, other considers- lions, such as space restriction* and belter air distribution in very lorge engines, may favor the centrifugal blower, and it is the only answer for extremely large units. To give a clear picture of the relation between blower characteristics and en gine oir requirements, the author onalyxca the situation fully, giving airrequirement data based on experimental Investigations of 2-cycle engines of 17.5, 21.5 and 29 In. bore, with 5 to 10 cylin ders. He point* out that characteristic curves must be constructed ^ot ,r; blower unit as installed, allowing#; increasing resistance in the intfk (cm with increasing volume, ^*^7 motor speed with increasing hof^P^j and fouling of engine and blower rs*. Centrifugal blower must ba for the moat unfavorable condN.S 90 F, minimum barometer, load, plus allowance for loulint^^ makes It necessary to limit jr* power ot high-density and . (Continued on page 10*) $ 142 (646) Celonese Exposure Tests indicate "indefinite service" for 5 leven test specimens of Everdur* Rigid nitely in service as electrical conduit in the E Electrical Conduit, W nominal size, locations tested." mounted on top of cooling towers of the Everdur Copper-Silicon Alloy Conduit pos Chemcel Plant at Bishop, lfexa9, graduated sesses high strength, is non-magnetic, work- . with honors from a 95-4ay course in.com- able and weldable. It Is available in two wall pound exposure. thicknesses: rigid conduit (RC) in nominal These 2" long test.sections were,exposed sizes from V" to 4" inclusive; and the thin to sunlight, continuous water vapor spray, ner walled electrical metallic tubing (EMT) plant fumes, plant Northeast and Southwest in nominal sizes % " to 2" inclusive. Complete ; winds and a temperature range of 32 F. to 87 F. lines of fittings... connectors, couplings, out let boxes, etc.,.. are available in Everdur Examination showed no pitting of samples , and an average corrosion rate of .000395 Alloys from leading manufacturers. U.S, PM.Off. <, hp-y- "During the test," states the Metallurgi ^ Laboratory report, "the surface of the , 8Pec**nens became coated with a thin, black ; cfTosion product film which would be in no WaY detrimental in the service intended." .. Everdur Conduit would," the report con). tinues, "at the rates determined, last indefi- ELECTRICAL CONDUIT THE AMERICAN BRASS COMPANY m;. jSMMlONAl GUARD DEFENDS AMERICA-J0IN N0W1" Oeneral Office*: Woterbury 86, Connecticut SubmJdlery of Anaconda Copper Mining Company In CmwOet Ahacokda Amcricam Brau Vtb., New Tbxwito, Ont. Otfob*r J94g 141