Document 4QYnEbGXXd6Nr17wOeqj7gXNQ

INSTITUTIONAL PUNT COftlJflMrf F team, Fig. 6, feeds three 500-kw tur bine-generators, Fig. 1, the i-d-fan drives, and two of the three boiler-feed pumps, plus* the two major pressure- reducing stations, Fig. 7, operating in series (or institution process and laun dry needs. .Two lurbine-generstors are noncon densing, one -is condensing, with space for a later condensing unit Turbines are all multistage (see equipment table, p 83) and multivolve design for throttle conditions of .250-psig pressure and 750-F temperature*. The noricon- denting' units discharge directly Into the SO-psig.process header and the con- - denting unit into'a surface condenser, - Fig. 4, at 1 pila. An i-d codling tower, Fig. 5, supplies the cooling water for the 2-pass, nondivided condenser. Pressurc-teducing stations hove two 'oir-operoted reducing votvo* running in Clectnc energy, generated st 2400 v, porollel with One pressure controller. Desuperheoters use otomiied iteom feeds into* mets 1-clod switchgear onto the station bus (or distribution. A double-ended indoor substation, 2400- 480 v, supplies station power through desired pressure,and temperature, or two 300-kvs transformers. A 2-section can be controlled'manually from the . 480-v motor-control center contains . centralised control panels. - breakers snd motor starters (nr all Operation. Centralised.control -panels, power-plant motors. Station lighting just mentioned, stand on the operating comes from two 25-kvs, 480-120/240-v, floor, for the slenm- and eloctrical-gen- logle-phste, 60-eycle trsnsformers. crating equipment. They carry the nec Daily peak electrical loads - occur essary controls for these major ele when laundry and kitchen stoves are on ments, the pressure-reducing stations,, the line. Crestest loads, develop in win building lighting, heating, ventilating ter when heating-system ventilating fans and motor-driven auxiliaries. In addi add their demands to laundry and tion, the boiler feed pump snd feedwater kitchen peaks. In spring and fall one piping system are operated on this same condensing and one noncondensing tur floor level. An annunciator notifies the bine-generator in parallel balance proc 2-man crew of any irregularities. ess steam, electrical loads. With about a year and a half of 1 Steam-distributfon mains, electric service, 110-F water from two hot-water storage tanka in the power plant, cold softened water from three teollto watersofteners, compressed air and conden sate return mains reach the major-: buildings through underground tunnels. These tunnels also serve for employe traffic and food transportation. Troubles have been few, relatively light. At the start, condensate, returned from part of healing system, was con taminated with oil, which had accumu lated from using steam engines in the old plant. This condensate we bypassed, to the sewer the first few weeks, but* Power Atralllortes. To get the desired' operation under our belts results have now we Alter it for feed. reliability ond continuity of services we proved good. All services--steam, elec In summer, the condensing turbine- instolled duplicate power-plant auxilia ries, Including turbine-driven auxiliary drives on equipment-' needed fur emer gency start-up. The i-d fan ond its turbine drive, as mentioned, are built to give full-rated output under stoker and dust-collector operation. Pressure-reducing stations, Fig. 7, employ two sir-opersted diaphragm-re ducing valves in parallel with a single pressure controller. Smaller valve opens trical, energy, hot and cold water, com pressed air--tvary In demand from sea son to season and from hour to hour. The laundry, for example, pulls steam and electricity daily from 8:00 am to 4:00 pm except Sunday. During start-up the laundry takes a very heavy hotwater draw. When you add the. heating season demands both boilers have to run tomeet peaks. In summer at lowest loads one holler atone can handle the generator meets the electrical energy needs. Exhaust steam from auxiliarydrive turbines, evaporators and pres sure-reducing and desuperheating sta tions supplies 50-psig process steam. This same condensing turbine plus ono noncondeniing unit takes care of the fall* season load. Machines run in parallel and electrical load is propor tioned by manual regulation of the tur bine speeds on the switchboard, so near first, gives more accurate control during demand at 50% of Its rated output. ly all S0-psig process steam comes from low-load flows. The two desuperheaters, jet design, use a small amount of highpressure-steam fan atomisation. Desu perheating water comes from boiler feedwoter discharge headers under control CORRECTION the noncondensing unit. Winter, however, presents i different picture. The SO-psig steam load it greater than the electrical. Then ths noncondensing turbines carry the elec of air-operated diaphram-type valves. In the ankle, "Hospital* Need Me trical energy port of the load and pro Atomixation steam is controlled in like fashion by the same type valve except it does not modulate for the different steam-flow rotes. Piesiure-reducing end desuperheater stations operate automat chanical 'Know-How" (May Powen, pp 77-9) Tables I and II, columns 4 and 5 should both he labeled. "Power, Light & Heat - Com,"---not broken down as shown. vide some of SO-psig demand. Turbinedriven auxiliaries and evaporators meet remainder of this process-steam demand with pressure-reducing and desuper heating stations ready (or makeup so the ically with any instrument selling for steam cycle is highly flexible. ENOINEERINO AND MANAGEMENT SECTION POWER PRINCIPAL POWER-PLANT EQUIPMENT Rochester Slots Hospital, Rochester, Minn. Sfeam-Oenoreffag equipment: Air comprcaeor*. I............................................................Quincy Cempremw Co Two-auge capacity, each unit 01 cfm, 000 rpm, 90*100 pelg. dual control Bolter*, S.................. .................................................Wm TVJlrr Mf| Co 30.000 lb p*r hr, IT* p*)|. TJO F. S drum, bent tub*. MJJ *q ftbollcr 'eurfMc, STS M) ft watervail surface, 11*0 eu A furnace volume .......... Win Brae Boiler Mfg Co for cuntinuoue or latcrndltent operation, drives with V-belt by ll-hp 1771-rpm Induction motor. 440 v, 3 phase, 60 cycle Air-receiver tanka, 3....................................Moorhead Machinery ft Boiler Co 36 in. dia lift high, A8MB Code, welded ttcel tank* :tioa*. tabular Burner*. ....................................................................... Peabody Engineering Co Coafrol 6 Motoring fqolpmonl: Cwnbiaatioo, oil and |t, ring-type b<h prewar* |U burner*, rooehenkal- atomiaatioM oil burner* Benina...................................................... ......................................... PHbrfeo Co MoaoUlhie refractory, loauialion and rteol casing Prasaure-reducing etatlona........................................ Republic Ftow Meter* C 3S0-II0 pelg snd II0-SQ pelg Precsura-voduriog ata liana, SO-6 pdg.................................Pkho Qorcniw Co I.ndFuacne-Hda-dcrkafttypr*eiu, ,onIe...p..e..e...b..o..i.l.e..r.,...3..4..,.0..0...0...l.b....|.a..a....p..e..r...h..r.....S.....4..<..ln......w. P(rat-DanlelCarpSDtetasumpeFrhloewatmercsittraat;ion*. ................................................. Tsylc* Instrument Cos Induced-draft fan drier*, 3................................. Ot Laval Steam Turbin* Co Steam generator*.................................................................... Bailey Meter Co Steam turbine, 40 bp. and reduction |iar: ISO pais. 710-F Inlet, SO-pai| backpressure Forced-draft Tana, 1...................................................................... Ctar*|* Fan Co Vane controlled, Inlet damper, 41,300-lb air par hr, 7.4.la. w| Forced-draft fan drier*, I....................................................Ocncral Electric Co Induction meter. IS hp. 440 v, 1 pheee, SO cycle Oil-pumptnt oaaembty.................................................................... Leahy Mf| Co Oil pump, I. duptu, fleam drIran, IS ppm ........................Worthinttoo Corp OH pump, t....................... . ............................. Da Lerel Steam Turbin* Co ESSMST"!.............................................. co Qae-ftow meter*........................................................... Republic Flow Meter* Co Hot-watcr storage heater*..................... ..............................................Leslie Co Water meters.............................................................................Worthington Cwp Oil meter*........................... ....................................................... Worthington Corp Pressure and temperature roewdere: Steam generator.......................................................................Bailey Meter Co Procee* steam............... '... ....................................Republic Flow Meter* Co acre* type, moecr driven, IS gpn> Oil healer, I........................................... .....................Leahy Mf| Co Efocfrlesl Eqofpmoaf: Blowdown lank, 11 FU*b tank, I . (............................... Blowdown valrca................................... 9afrU(,*al*a........................................... Steam purifier......................................... Miter, CO, ............................................ . .MtneeapoU* Tank ft Mf| Co ...................Yametl-Warlnt Co .......... Ferrl* gng<n*crla Corp ...........................CcntrlSi Corp ...............................Permtitli Co Metnl-ried Switchgear, Indoor. ......................... Wcttlngbouso Electric Corp 3 kv, 3400 v, 3 phase, 3 wire, 60 cycle, 1100 amps, 3-pole, removable type . Control twitchboord, duplca.................................Westingbouse Electric Corp Timnel type with ail relays on rear Circuit breaker*.. :................................................ Wcatinghous* Electric Carp Oeneretor field, 310-v dc, nonaatnmatle, 7 pot*, tingle throw Power center. Indoor: 600 kve. double ended.......... Wcatinghou** Bloc Cewp Powsr-Gooerofiag fquipatoof; Trmmformtt*: 100 Irva, 3 phase, 60 eyria; high veitage. 3400, delta, connected; low-voitage, 400, 4clta<onncetcd Turbtnea, 1...............................................................................Wertbln(tor> Corp Two, 100 bw, ooncendenaing, ailal flow. Impulse type, 13a pate, ISO F. 1000 rpm. S valve, 6 itege. SO-pi| bockprcaaura; one. 100 kw, consenting II taa. 1-pets baekpranura Reduction ptn, 910 hp, douMa-halleal typo........ T.........Worthington Corp Oencralcr, I............................................................ Electric Machinery Mfg Co IS bra. 3400 r, 1 phase, 60 cycle,' l4oo rpm. air cooled iwifohgoar: low voltage, metal enclosed, 460 v, 3 phase. 3 wire, 64 cycle Power breaker*; removable, lyps 00-31, 600 v, 600 amp, 3 poia, aiagle throw. 330-v ae, eleetrleally operated with adjustable time overcurrent proCKtion and Inttanianaou* trip Ughting braaSor: removable type, 600 v, 100 amp Indoor motor-control center................................. Wcstlnghouae Electric Carp Lighting panelboard*. . ............................. ..........Wealinghouse Bloct/W Carp Dc eiciirr. J............................................................Electric Machinery Mfg Co 1 kr, direct-coancctcd to sencratar theft, I IS.volt de OfAor fqolpmoaf: Condenser, l.................................................. Condenicr Service and Bngrg Co Two pan, lurfeet type. SOO aq ft, tuba length II ft: supported from turbine eshaust nonle, twin-elemeat 3-otage air ejeetor with Into- and ft-eonderucr Condensate pump*. *............................................................. lngcr*oil-R*id Co tl tpm. S750 rpm, dlaeharie head 111 ft, driven by f-hp 440-v S.phaae Induction motor Coollai tower, I..........................................LUle-Hoffman Cooling Tower*. Inc ' Induced-draft type, capacity 1300 gpm, from OS to SO F: wet bulb 71 F. 1 fan*, total cmparity 330,090-cfm air, US rpm. each driven through . Cleveland reduction gear by lt-hp 1710-rpra teully-eoetoacd fan-cooled . 440-r 3-phaae 60 eyelo Louie AUla Co induction motor CtmilallAg.watcr pomp*, 3.:..................Pood Machinery ft Chemical Corp Water eaftenlng........................................................Watw Softening Swlea Co 5o<f/um-foofrTo-aoffon*r fanki, 3i 7 ft dia g ft high, vertical, flow ' capacity of each 300 gpm. 70,000 gal between regeneration* 0rine-ftiea*uring lank, li 30 la. dia a 40 in, high, vertical EaTf-aforaga rank, 1:14 In. die 4g in. high, vatkal Salt-handling equipment............................................................... Jeffrey Mfg Co One boeket elevator and aerew conveyor, 7 tana per hr Bump pump*................................................................................ Aware Pump Co Duple* unit, each 100 gpm, IS-fl head, direct connected to l-hp, 1710-rpm Induction motor*. 440 v, 3 phew, 00 eyela Hat-eratcr storage heater*,' I.............................. Minneapolis Tank 6* Mfg Co 1-ft-dia e 17-ft-tong, horlaontal. wridcd-Mcri tanka, lubmerged heating IterUonial centrifugal. capacity MOO gpm, each 4S-ft head, direct- coftfioctcd to 10-hp, Ideal Electric Co, iplaih-proof, induction motor, 440 v,,j phase, 60 eyrie, 1710 rpm unit, each 46 aq ft heating *urf*ce, Dell A Qoactl Co, flow capacity, 4000 gph, storage 3000 gal Oil storage, 4..............................................................Wa Drew Boiler Si Mfg Co ll*fi-dia a Jl-ft-loni, horUontat. weidcd-steel tanks, aubmergad beating Foorfwotar fqaJpmonf: unit, Roa* Heater Co Ventilating fane, 3...........................WceUnghouaa Else Corp, Sturtevenl Dir Asiflo diKt-typa fane, each 11,000 cfm at 70 P, 300 rpm, V-belt driven Deaerating heater, I.................... ....................................... Wocthlntton Corp by 1-bp 1710-rpm induction motor, 440 v, 3 phase, 60 cycle - Aow capacity 70,000 lb par hr, itoragc capacity 6000 lb, naatlng section vertical with eurraee-type vent condenser, horirontaJ Heating units....................................................................................... McQuay, f 3 section* capable of raising temperature of air from-30 to SO Ferhen storage'sectimi uppUed with attain at 1 pelf, 410 F Boiler f**d pump*, 3....................................................Warren 8Uan> Pump Co Filter bank.........................................................................Amcricao Air Fitter Co horlaoutaL centrifugal pump: eapocity, each unit, 90 gpm, Unit heater*.......................................................................................... McQuay, Inc' discharge head, 070 ft, direct-connected to 40.1'hp steam turbine, 1SS0. Piping fsbi Icatlon Si erection........................................Reuben L Anderson Co rpm, ISO-prig. 7SO-F backprcaaure. SO.palg. Whlton Machine Co BoUw feed pump, I.................................................................... Jackson Co ...... -........................ 1SS.X". 10-etag*, Hydropica, vertical, centrifugal pump; eapocity, 40 gpm; Low-pr*ura valve*........................................................................Wn Powell Co dlaeharie head, 090 ft; direct-connected to 30-hp Induction motor, 1600 Welding attlng*......................................................................................... Ladlah Co rpm, 440 v. 1 phta*. 60 cycle. Lout* AllU Co. Bapenalon Joints.............................. Chicago Metal Hose Dlv, Ftexonlo Corp TJP***"*. ................... .......................................................Tho 61m* Co Prcnurc-roduclng valvci.......................................................Fisher Oovcranr Co Hcrlfwital eubmerted-tube, bundle capacity, each unit. 3100 1b pn hr Plow-conPol valve*............................... Mlnncapolb-Honcywctl Regulator Co 41 SO p*!| when supplied with etcam at 310 prig. 710 F. and feedwater Btoam trap*.................................................................... Kay* M MacDonald, lac at 110 F, besting ctirfaea 100 aq ft Safety valve*..............................................................................Parris Engrg Corp Bvaperetor few! pumps, S....................................................... Aurora Pump Co Backpressure rrlief valv*..............................................................Cochran* Ccrp !zTT*,al *urbln4 IFF*, eapocity, each unit, 6.4 gpm. discharge head, im *!: ,urtl"1 hewl- 100 dlreet-oonnactad to M-hp, 1710-rpm. Louis Atmospheric e*heu*t valve.................................................. Atwood Morrill Co Drainer*....................................................................................Fisher Onvcmor Co AM* Co, tplathprocf induction motor 440 v, 3 phata, 60 cycle ColJ4""e`e-Uanifer pump*. 3................. Food Machinery ft Chemical Corp Horlaenui centrifugal, each 130 gpm. ZOI-ft heed, dlract-connwted to Major Coofrectari; >'hp. 1710-rpm, Ideal Elect-Co pteihpeaof Induction motor, 4*0 v. 3 phew, 60 cycle ......................... Bcntcka Co CidauaU.ltwa|a tank, I.............................Minneapolis Tank and Mfg Co . .Southwest Electric Cwp [0 ft die * II ft high, welded etrel tank Architect* end Engineer*. ....................... Ellcrb* ft Co iUlY 1953 ENGINEERING AND MANAGEMENT SECTION