1 - Alaska Energy Data Inventory

-D5 I 4 'l 3 I 2 1I THIS TANK IS UNSTABLE AND LESS THAN DESIGN SIZE-j THIS TANK REPRESENTS INCIPIENT INSTABILITY AND IS LESS THAN DESIGN SIZE -NOT RECOMMENDED FOR DESIGNNOT RECOMMENDED FOR DESIGNNOTESSIZE OF AIR CHAMBER SURGE TANK FOR THESE PLOTS:AIR VOLUME = 20,000 C.F. SIZE OF AIR CHAMBER SURGE TANK FOR THESE PLOTS: I PROFILES ARE BASED ON DATA FROM THE COMPUTER PROGRAMWATER VOLUME ~ 14,508 C.F. AIR VOLUME - 34,000 C.F."MSUHGE" AS MODIFIED TO ANALYZE AIR CHAMBER SURGE TANKS.WATER VOLUME ~ 14,50B C.F.TOTAL VOLUME ~ 34,508 C.F.TOTAL VOLUME - 48,508 C.F. 2 MINIMUM HYDRAULIC LOSSES WERE ASSUMED IN THE POWER CON-SAFETY FACTOR FOR STABILITY ~ 20,000/34,000 = 0.59SAFETY FACTOR FOR STABILITY - 34,000/34,000 = 1.00 lJUIT FOR AN II FT NOMINAL DIAMETER POWER TUNNEL ANO 6 FT870 821OIflMfTER STEEL PENSTOCKn n860 ~ A820 CONOI T IONS3 SEF PLATE B2ZFOR TURBINE CHARACTERISTICS FOR STABILITYE860AEf'HOFI1.FS ARE BASED ON STABILITY CONDITION ''A,'' WH ICH IS THELL"E n E 819 MUS r CRITiCAL CONDITION AND IS REPRESENTED BY A SMALL LOADV 840 V CHANGE AS FOLLOWS (SEE PLATE 822)AATT AT TI ME " 0 SII818I 830 I TURBINE OUTPU T ::: 40,700 H P r--00 TURBINE EFFICIENCY = 0.92N /\ f\ '\ N RESERVOIR ELEV :: 831. 9 FT820817 TAILWATER ELEV. = 11.4 FTI I TURBINE NET HEAD- 80.0..0. FTN ~\ / \810 N AT TIME" 4STURBINE o.UTPUT '" 41,50.0. HPV816F\,F TURBINE EFRCIENCY '" 0. 91800 RESERVo.lR ELEV ,,831.9 FTEETAILWATER ELEV." 11.4 FTTT 815V790 5 STABILITY PROFILES FOR THE RECOMMENDED AIR CHAMBERV SURGE TANK ARE SHOWN ON PLATE 824.814C 760VV V V V770 8130 50 100 160 200 250 300 350 400 450 500 0 50 100 150 200 250 300 350 400 450 500TIME IN SECONDSV V V v v CTII£ IN SECONDSDELEVA TION OF HYDRAULIC GRADIENT VS. TIMEELEVATION OF HYDRAULIC GRADIENT VS. TIME.---SUR168.8 166.5SUR 166.49F 168.7 FA ~ ~ 1\~ ACC 168.46f\B E E168,6 166.47EELLE168.6 l\ f\E 168.46VV\ If \ \ vAATT 168.45I10 168.40N VN 166.44Revls60nsVSymbol Descriptions D.,. ApprovedI 1 168.43 .--.-- N 168,3V NBF V F 168.42EE 168,2VT V T 166.41V E liVVV V VA168,1 168.40 50 100 150 200 250 300 350 400 450 500 0 50 100 150 200 250 300 350 400 450 500Iu.s. ARMY ENGINEER DISTRICTCORPS OF ENGINEERSANCHORAGE, ALASKATIME IN SECON)S TIME IN SECONDS Desl9ned by; PROJECT, ALASKA.:r IV::) m SECOND STAGE DEVELOPMENT ADfo.wn by; lIS ....."""'"CRATER LAKEWATER SURFACE ELEVATION VS. TIMEWATER SURFACE ELEVATION VS. TIME...JK.L~p,~~ ...(rntZ' b"J. '~, .1];;Ji:'" ..... ~SNETTISHAM-Scale;A8 ..oWN• c ....... UQ~Q.y ~Oe'e; 84 A.UG. 17AL TERNA TIVE PLAN IIIAIR CHAMBER SURGE TANKSTABILITY PROFILES I OF "Sh .. treterenceonumber:Ika.lng Sheet __ •• __Code: 1~1"""5 14 I 3 l 2 DESIGN MEMORANDUM 26 PLATE 823