Document YDen7D9aDoMR65LvR0ywoEgEO

FILE NAME: ZK/L DATE: DOC#: BO/L DOCUMENT DESCRIPTION: d:Z I I I 'NKC>OP~ flubllsller P W SWAIN, Editor L N ROWLEY, Managing Editor ANNETT Associate Editors: E W FELLER 8 G A SKROTZJCI I Editors: J L KING JC McCABE CF SANDERS An Editor: C F MARSCHALEK Buslneu Manager: BE SAWYER 1/9ton: D D Hogate Atlanta: Earl Mauldin 0RLD NEWS OFFICES: london, Paris, lerlln, ,scow, Prague, Shanghai, Bombay, Mexlco City VOLUME 91, NUMBER 12 A CROSS-INDEX Of Sli3JCTS f".(;Ht THE MC::,l fh __ -------~----. ...........-~--. ',,..,__, ,_...,. -". ::"--~.---. -~--,...,....,_,._, --.~ PlANT OPERATING METHODS, MAINTENANCE AND SArff1 \ STEAM GENERATION, FUELS, FIRING ANO COMBUSTION TURBINES, ENGINES, AUXILIARIES; HYDRO PO'.VER DIESELS, GAS ENGINES AND ACCESSORIES AIR CONDITIONING AND REFRIGERATION ELECTRICAL EQUIPMENT, ELEVATORS PIPING; VALVES AND SPECIALTIES TRANSMISSION, LUBRICATION STEAM SERVICES, HEATlNG INSTRUMENTS, CONTROLS PUMPS, COMPRESSORS i EN1ALS OF FEEDWATER TREATMENT .......... . I, I, :tives of feedwater treatment ..................... . Ii ficotion of water ................................ . -soda and hot process softening ................... . Ii il \, ining by ion exchange ....................... . iOds of removing dissolved silica ............. . rnol treatment: methods, materials ...... . ~ration, evaporation and b!owdow11 ... . 80 ,.cc,:,;wv,J:. 83 cc, .,.,",;~ fomental water chemistry ........ . 86 rnicol building blocks ........... . ; ryday control tests ............................ . 87 '-><IAc~, / 93 ! meaning of water analysis ............... . 96 iful chemical data ............... . 98 ...~,..,,,.,'1/1 ff:\ i');~ ;~J, ~--1:~L nen lead American Society of Mechanical Engineers .. . 00-hp Saguenay hydro plants ...................... . 99 ,M~:,' 102 ,,,,.....,~ ;t gos-turbine plant features new centrifugal compressor 103 "'''!" ers hear new and old at ASME meeting. , ............. . 106 w.,~}t Power readers say .................. . 103 cal aids ' ........... 110 f'5 problems ... 114 Q &A ....... 118 tips .... ' .. 124 to-" . . . '' .. 126 Engineer's bookshelf . ..... 128.,.,,,~.l> What's new in equipment. 130 .,.,,,-~.;.~-:i. Data sheet 138 >,,o,;~M'/1' George Edwards 140 ,,,,,,,,, Power news ..... -t ;; ~ 'l 4 ,4 ~ ,j ~ ~ 1 '3 1 1! ;i 91, NUMBER 12 AllC ASP COPYRlGHT 1947 by McGRAW-HILL PUBLISHING CO.. INC. ALL itlGHTS llES.ERHD H Mc.Graw Founder and Honorary Chairman; JanLi H Mc.Gra'i'f.---Jr, PMddent; Curti5 W McGra Senior Vice~Pr~sidcnt a-11::! Trea~IJ.et; Jo:;eph A jl, Secretary'; NeJson Bond Directer of Adverthlng; Eugene 0uffield1 Editorial Assistant to the Pr~sld8nt; J E: Blackburn1 .Jrt Di,<>cto, of Cir.:_u\atiun 1'.:T MANAGERS: New York, W W Quarles; Philadelphia, C R tong; Cteveland F B Godley Chicago C Boughton: Boston, C L Morton; St. Lo,,is, S+ars PIJRLICATION OFFICE: 99-129 Broadway, Albany I N Y 0 E0ITOR IAL AND EXECUTIVE 0 Fl"t<'.:E, 330 W 4Jnd St, New York 18, N ~ Addreu: "MeGrawhlH New York" DISTRICT OFFICES: 520 Mkhigan A,e Chicago 11 8 Post St, San Francisco 4; N,a;ional Press 8idg, W,ash- 1 4r.Arcltit~cts Bldg, Philadelph!a 3; 738-'? O0ver Bldg, Pittsburgh 22; 1510 Hanna 8!d9. Cleveland 15; 2980 Penobscot Bldg, Detroit 1b; Conliner,tal St Loulf, ,8'. 1427 Statler Bldg,. Bo.ton I&;. !OH Rhodes-Havertl' Bldg, Allanta 3; !'c1lic finance Bldg, Los Angeles 14: Aldwych House, Aldw1cll, !'It, ,n WC(Z .. ..POWER. artk! .are indexed, lu, both the fndustrial Arn and the Engineering Index ", P:Q~E.!t \ssu_ef. 0l'(n index annually: ,:op!es ue . , {[:Sf~~%;~!1/t ,hf~ ~n r~,iaest to the od,tarial <1/flce, 330.W: 42nd St., liw York .18. ..:.,:-, ,:..;_,.,p;,,,":.e.; Plant-Tested 1Uetlwds and lderu for Power 1Uen c t , ~ ! ~,JJJ1!1- ditions. I know of several other ca3e~ where oil on the commutator and brushes made it possible to operate overloaded motors when it would hav.. been practically impossible to do -~" otherwise. Nevertheless, keep oil i,if commutators except in an emergency because it is likely in tim,~ to des!rov the mica insulation. Chicago, Ill. R C HENDEH,oN Bell Gives Tongm~ To Water-Level Giage To FILL Ol:R ELEVATED WATER TA,'OC from the city street main, the fin~m,u, opens a vah, in the water-supply li11,: where it nm.s through the boiler room . .LL...2:.~n;;;;;m ~t::0~:i[t ,., io /loot in wo:.,r tonk PIPE INSULATIO:-1, generally used to cut fuel and operating cost by reducing heat losses from hot pipes, can also be applied to promote safe operations as was done in one plant. When the incoming steam line S to the molding machine was being insulated to prevent To Oil or Not to on Commutators and Brushes Mucn HAS BEEN SAID about the merits and demerits of oil on commutators, and much evidence can be presented on either side. At one time I had charge of ten 5-hp de motors, all driving the same kind of printing presses. The motors had driven smaller presses but were later installed on larger ones that overloaded them about 10%. In addition, they operated at 25% above normal speed by weakening their field. The motors, being noncommutating pole machines, sparked at their brushes heat loss and provide constant mold temperature, two lengths were put on the condensate return line as at C. These extend to above shoulder height and prevent employes being burned if they contact the line. Photo, courtesy Industrial Mineral Wool Institute. :md commutator. This condition was aggravated by high temperature killing brash lubrication. Operating conditions were so bad that the commutators on nine of these motors wore down completely in one year, when the motors were replaced with 7.5-hp machine~. A small amount of oil dripped from a bearing onto the commutator of the tenth motor. This unit gave no trouble, and its commutator and brushes showed practically no wear when the motor was replaced by a larger one along with the other nine. Here at least is one case where oil was beneficial to commutator and brush operation under severe con- - .. ~fot-spr.~ I contcc.ts Toi20v power source .7~ Bell ,- /g I ...__ _ _ _ _ __ _ ,I<?c j'~ Bell 1m11sfor'mer As in the drawing, the 1,;at.ir level in the tank is shown on a gage board that is ea~ily 8een by the fireman. At times something happened to :ake the li1c man's attention away frc-m filling the tank and it overflowed for some tim~. To bring him back onto his job I :n- stalled a bell alarm as in the dhgram. There are two flat-spiring contacts, one on each ,;ide of th,~ gage board near its bottom. I connected these to a bell through a bdl-ringin g transfonner. Now when the tank fills and the gage goes to the bottom its pointer bridgell 110 (858) POW ER, )ecember 1947 (,!!'.;~ ,.;:. 1, ,~ 1.1]>. -~'. ! ' :t \h1td, '.\' ::~ .,1, b C ,,~ t)( . ,r:.C ,i,~ ;c>} ~ JI\~ 1 r'"t,\ tL~i-'-' f~: ':,1), i 1,,it f, fti;tnt \;,r i:O i I.ti, ~h < ( ,.;',,. , 1 IN RAILROAD Another example proving. the right insulation correctly applied, never grows oid, POWER PLANT ENGINEERING: T\1c !tr,t src:11 ,,1 "' 111sc:: ,111,1 \\tl! t~i\c \'c,lf, t)t ,cr.lcl:', -.,ui..h ,1, rJ I\.L: ~rl,!1 1 111.,ii dc..,cr!hcd !"t:lt>\\. 1-. ~t ,.1ll ',ii 1 .. ll(J[) Cfl.l!,lfl<.:t ,. l11i1r1, \!.," ' . [ I ( ); l .\ 1){' ,1 ', RIGHT INSULATION: \L,m f\ pt.:, ,Jt 1n,uL1ti<>11, .,1-c ,,...,_.r. !!~1..."'. :nc,_; ,~r\ 11...l cunditH;u,. 1 : the 1 ;f 1: ,!.L::, :L l\,_ ....,1.: :'Lil L.:[,()c~itury-lar.~<.:."'il t>t lf'-1 kind 1 ,rr,,,-, c:tlicicnr in,l!bt11l!1, h,!\T -~, 1 1.,[\;Ji) "'pt:Ll~tli_..,t, i;~-!f1 \()II ll.:1 '.(.'(11 (~C' i; It . lfl~i..tll" <it.,([\ ' l .1.ci .tppi11_,lfl\l .Lire .tnJ1 1. '<'"," 1.:- 11.i'.: 11.J. ... ,, '', 1 t )\ /)L '-- .tl: -,1... !l \ I. I'.~ fl. 24 YEARS YOUNG! _Jolim-\Lrm ill<.: l muLtri,,:1s we<: . n,uikd tn ri11, fH>wcr plam of th<.: ,\li,sour1, K.tn,,1,;, i LX.is R.1il H.u,td ( :omp,1nv ,lC Par,ons, Kan.,.1s, hack :n 11).2 ,. llcc.tu,c this job was e11gi11t'ered right ,1n.i ,. 1J1J1l1t:il 11ght, Jt JS ,till providing dependable insub- [JO!l ,cnict.:, For hdp on your insulation '"' ' ~..... h' problems, ,vr1tc John:,-Manvillc, Box 290, .\ nv York l (>, .\. Y. ' ---- ---7 JOH NS MANVI LLEfv,J; ift 'NSULATIONS L -- - ,_i I low :f ER December 1947 1'41 ,,I