Document dnkMqrZ8rM7V0ZnnpED7L3G4G

MU ON SUT RIVER VUIEV PROltCT OIKS AND HYDROELECTRIC POWER PUNTS Conina Dam Bu"1 dev, ft ..... 2146 Homo Mesa....... 1924-17 1920 Monao.IT.l-- 1923-25 1671 ....... 1926-39 1535 .............. '936-39 1803 Spillway crest dev. ft 2120.25 1869.5-1891 1610.5 1506 1746 Length, ft 723 660 300 1260 800 Kdghl. ft 280 300 224 207 283 Drainage area, sq mi 5630 5940 6100 6200 5500 Lako enp, Head on ecra-fi lurh, ft 1,400,000 245,000 57,800 70,000 182,600 112-222 253.5 131.5 116.0 Geo cap. hp 24,000 43,000 10,000 17,500 NOT&Oi BwtWttDanfaanVenfoRJwrtaDrtlttnaafeUtltotf. 'least* k Pmper; hdatrt U tedreck to deck r rooOwtr- at nuwtrt to 13.000 W ari. T*ar or* ala* dam*; A* * bo dtraf*. tbre* to llvml tow Itetcd abo*) md mm to toad antral (not Usted above). la addition to tho four power elacta tftttd ito*. theta trcTour In the volley tas etaut'SOO ft tout tad In Che canal t/tteotl Crtm Cut Rent OcectlM la cite t*it b one of Ukm. Total capacity of ito plant* b 94.100 he-, vul plant* add 11,000 lip to a total bjrdre capacity of 100,100 hp. I!' .ji.:\*. \'n PRESIDENT of SRVWUA's board of gov. emors, Lin 8 Orme OttUted in orpanli- Ing the ossoctotlon bock In 1917 GENERAL MANAGER o! tho project. O L Norman succeeds H J Lowson, who directed its operation for many ycou SUPERINTENDENT of the Cft* plants, Clyds Williams Is response* jr for mony unvnuol ftoture* of deilpH than the veil water, end this system of treatment, scale problems have been largely eliminated end boiler internal surfaces are virtually as clean as when the boilers were installed. As now arranged, scavenging air far the diesels Is drawn in through washers ond oil-impingement filters and sup. plied to the engines at required pres, sure by two scavenging blowers, each driven by a 400-hp motor. Engine ex haust passes through woste-heat boilers to generate steam for general plant use. Mr .Williams now proposes to r* place the waste-heal boilers fay exhaust economizers, which will replace (ho last-stage of feedwater heating by bled steam. Estimates indicate that thia will Increase turbine output by about 1500 kw at a cost of about 140,000, thus making added capacity available at leas than 930 per kw. Dollor Float. Tbo three integral-fur nace boilers, eaoh rated at 100,000 lb per hr at 450 pal and 750 F, are oil and gas fired, with air beaters but no economiters. Originally installed for full out door operation, experience during heavy rain storms indicated need for some protection, largely for the benefit of the operating crew. So a tight cortugeted-tteel root and pattial aide housing has been installed on the boil* era proper. Forced- and Induced-draft fans, air heaters and stacks are still fully exposed. Fuel oil for the boilers is stored In two tanks (40,000 and 25,000 bbl), equipped with suction heaters, and sup. plied by tank car. The fuel pumps dis charge through steam beaters to the burners, which are ateam-atomfzlng for the lower port of the load range, and mechanical-atomizing for the upper part A centralized boiler control board mounts the fully automatic combustioncontrol equipment and boiler gages and meters. There are three large boiler, feed pumps, one turbine driven and two motor driven, with a smaller motordriven pump for light loads. A sep arate lank stores diesel fuel (40% hunker C and 60% diesel oil) which is heated and filtered before entering tho engine system. A limited supply of natural gas is also avolloble to the plant. The boilers hove all been fitted for burning gas, and experimental work is now under way to establish the feasibility of making the diesels gas hunting under the low-pres sure-admission or dusl.fuel system. This work is being done on a single cylinder of No. 1 engine, which has been isolated (or the purpose, and when development is completed it is expected that both en gines will be adapted to burning gas, If ond when gas is available. Turbine Flout. The three turbines are identical 14-stage machines, with three bleed points. At present, the loweststage bleed supplies tubular heaters, the middle-stage deaerating heaters, and the highest-stage tubular heaters. Makeup from the evaporators enter* the deaerating healers. Condensate is pumped first through the steam-jet airejector condensers ond then through the 13th stage heator to the deaerator. A booster pumps condensate from the deaerator to o hotwell from which the boiicr-feed pumps take their suction, discharging through the 4th stage healer to the boilers. The 4th-stage heater condensate is trapped back to the deaerator and the 13ih stage heater condensate is trapped back to the denier. Clectrle Syitom. The main bus stnio, ture and transformer banks are outside the steam plant. Into this bus connectthe ilea with Parker Dam, Cestui Ari zona Light and Power, Inspiration Cop per Co; os well as ties with the other Salt River plants. Power generated it Cross Cut is controlled by two switch boards: One in the hydro buiUU| handles both 60- end 25-cycle hydro generation, the 'frequency changer, tsd the 25-cycle power from the diesels. Tbs other, in the turbine-room of the itesa plan!, handles the 25-cycle output of that plant. Operating praMemi faced by this if*, lem are unusually severe: water is relsilvely scarce, air is dust-laden, and ten*" peratures are high. A variety of loifconditions must bo supplied over so eitensive transmission system exposed ts severe mountain electrical Itoroes, 11, two different frequencies generated hr hydro units dependent in the last P- nlysis on rainfall conditions and bj firm-power units made inadequate hr heavy load growth. To a great extent the purely mechanical problem* ^ water, air and temperature have bee* solved; tho system-operation proM*** created by dual frequeney end rapid load growth are most pressing no* *** must be resolved in the near future. Water Treatment. Taking brat the water problem, makeup for the Cron Cut plont came originally from two seF arete groups of wells. This water ***, high In scale-forming mineral salts- Sd phurlc acid proved effective In tho eB*' ing towers but makeup for the d* boilers and waste-beat boilers red3'*" 44 1358) gelito softening ahead of the ev&pora- | da These treatment methods proved j efiecthe but although costs were In line 1 with other plants under similor condifai/they were high at best, with heavy ttardovn- Experiment and'tat indluted that cons] water from the hydro pUat averaged much lower In tempera* bus than tho cooling-tower water in tffTptnftT months, and was muoh lower in Kale-forming salts than the well water. 9y iaitaMing ordinary sand fitters (or die canal water ahead of the zeolite (shatters and by putting the evapora tor* fa series, boiler blowdown has : leas reduced to virtually taro, for a absiaatial cost saving. Use of canal nier also means cfeaner surfaces In da diesel jackets which means belter ' tat transfer and lower maintenance. l)w (the cooler canal water In both 'Hum and diesel plants permits carrymg full load at best economy during 1st summer months. Increasing caNthy when it is most needed. Aii Washing. The air In the desert LUBE-OIL TREATMENT by centrifuging ond fuller's oorth filtration, os above, helped solve eorly beorlng troubles. One centrifuge serves both engine* but ooch box Its own furors. Blower removes off vopora from tho engine sumps, which hove otr fitter* country is hot, dry and contains contHerahla abrasive dust. Diesel liner <sd ring wear were materially reduced by installing air washers ahead of tho 6ken oo tho scavenging blowers. Air Mien have been installed throughout dm plant to keep out dust os far as taiible. Lubrication of the diesel engines pro* fated certoin problems which have ten solved by redesign of the lubrica- PBdrcufOtlng tint r ( - Pump sucl/on Purifier-* with fauollretar "a rafUtt | 1 4 i "a system with provision for oil purl^tfcn (diagram right j. Earfy bear. *H troubles seemed to result from ex^ulvo foreign matter in the crankcase consisting of siliceous material, car'TMa* and finely ground metallic par- RECLAIMING CYLINDER OIL effects further soving*. System consists of steom-hcoted filtering units with studgo blowdowns, storage tank, screen, and fuller's earth purifier *0WER Juno 1940 (359) 95 .1 A I! ' v. if . j :u j-.tii H '..Vi V- iJi -r-J ['l\l 1* ?L' ;.v. f, i'i -k