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1? foifefciae foster c $<A` (peNmoanesonidloyset,nhatjeootrFyfetiobhairetseoisrlfymeH,do.torIato.hMswnpeea.s.ltsti,oeof9Irt0s>-a>7.p.pWlicoartnio-n t * *heykno^wosthtiecyarwoounn'tdhcoovmeteorspoaftcInh- #a ,*'*nen,o*theymusty **ercoating> -.-Si' a*TtsdhuEieolnMaoetwsaaeaywpsistwthpyi.colttih`rerreok~edswa-muibn*elistilvliofuin-trnlyogadmmtaion'uatnssidkn.ep'erregsu.c*cgicoagolrieezndefiindddefmuonrarcamienbutIialtnioitnyHtiioon.ngfI.Ffu,oMonsriaffteohs>rtemic-*rotects Poster's uninue "'idol day, "*I'stc^ayots.mesnuUbrdi.enSe,a..d*tipoOp-one*Ofteorno'Of>lwe^oueVsm~ab*Xtahen*ssed'pt0rtaaph*.nraok-lt'oss*f,.paoifnpsdoebloinrpoeposr,todhpunrc.i,dtst,eanoos va.ri fc\n *-slerorfreezer --im- iteitIunqt'suonui>mpl>amstie.onIn-nt-s,f.tuahrci.fnat,.gc.wemhceoarsaettivtcie.croyaotuinngevthd. aTt-w,on.,*. * l-<smweathering,orde~'merit,there's oVb M. I. Mnlk toa ** cmcttS m tt*mk <rt IN. ,hk| nm < !. AffpOtvIlM, It Mfe, |m|S<MIm J, fosterBENJAMIN COMPANY 4633-37 W. Girard Ave.. Philadelphia 31, Pa. See the Foster catalog In Sweet's Plant Engineer ing and Industrial Construction Files for 1953 More TECHNICAL BRIER ------------------ - these to us are the most closed cycle gas turbine versel power plant but it Ctr! | better In some fields than of plants, end only lime wQjJj end other thermal power pbaj duced since the wor to fiQlj ^ place in the power general!! ASMS Paper No. 52^137 71 Retory Regenerative Air p,,^ Oas Turbines. By A T Botub? llrynistak, C A Partont * Cs The advantages of the reL type heat exchanger are that c* draulio diameters can be rerf loined, ond that when the,, counlerflow arrangement is ^ matrix is self-cleaning to sooie, particularly during that pah operating cycle when high wetacUi preaaure differences ora opd Agoinst this must be taken the* of providing an efficient seal b the air and gas flows. v In comparison, if flame trap s era employed in both, the reen can be designed to have hydrtd ametera of the same order as tki the regenerator. The matrix, fa is not self cleaning, and thu* ous outside provision must be tu keep it in working order. Thb.a sadly involves an equivalent postr but one which can justifiably U, pared with the auxiliary power la of the regenerator. The sepwlw the gas ond air flows, however, tm made in the matrix itself, which qJ cates the problem of cheap atlb manufacture. ^ The inter-relation of these h tnges and disadvantages especUQjI concerning the problem of sealiaf regenerator, and the effeotive emti solution, will be the rosin eriwfl the assessment of the relative dflfq the two types of heal exchanger. 4S Paper No. 52-d-7d. Miscellaneous Design and Calibration of A I Cavitation Laboratory. By //d, mann and R S Sproufe. The Dominion Engineering Ltd, new cavitation laboratory de^ in this paper is used for testing * range of hydraulic turbine o' signs, from francis types with speeds as low as 18 under heads * as 80 ft, to propeller types with IF speeds as high as 180, under heads to 2S ft. The paper covers roiaf features provided in the labors insure oecuraey of test result* reduce operating costs ond Inela^j fOwet fHlUAf*. iog statioo, pipc-lioe facility, water or woste treatment plant. Many customers have takeo advaotage of Dravo's 60 years of experience in all types of engineering con struction and have benefited through (he savings made possible by Dravo's single-contract responsibility. Dravo considers customer satisfaction an essential factor lo all Its products and services. DRAVO COR PORATION, PITTSBURGH, PENNSYLVANIA, ORAVO *k conditioning 'boiler ond power plonlljSOawL bridge ub.itrueturo comproHor ond Pumping itaiien, , ereno cob cooler. : 'is/ docLi, lock* end dom. -VsjEgSroTV dredging gentry ond Rooting |s, indvilriol fovndotlont merino repoirt ^P{sS^C*^55^ open (tool flooring or* ond coal bridge. ond BnnrTTplpo prefobrlcatlon and oreciton^Q PXpunp howioi ond Intake. 7|vw loud and gravol rivor traniper1qlton^^^^^^^.lope., ihafti ond ll reodv-mUed concrete ipoco hoatori Bum lapping eonlciniri ' owbooli ond borgsi r' woler ond woile Iroalmonl planti *EUUAy IfS3 liUtli.