MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

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TYPICAL WOODENPADDLE AND CHAINDESIGN *TYPICAL WECESTO GUIDE CHAINDRIVE AXLE TOPRIME MOVER \OPTIONAL COVER FORSTEEP INCLINE OPERATIONFigure 3.18Water ladder with open flume (Note:enclosed-flumea "chain pump.") (After Schioler, 1975)water ladder is essentially
70engine (2-3 hp) as the prime mover, performance testing was doneby SubinPinkayan at the SEATO Graduate School of Engineering(Bangkok) on a waterladder similar to those used throughout much of Asia. This pump, with a2-3 hp engine driver, delivered about 0.8 cfs at a 3 ft head. Molenaar(1956) reported that a water ladder powered by 4 men could lift 0.23 cfs3 ft. The water ladder, as tested by Pinkayan, is normally limited to 3ft lifts and for operation by two men (i.e., with foot treadle) would costabout $35-$40 (Molenaar, 1956).3.3.1.3 Chain PumpThe chain pump is very similar in design and operation to thewater ladder. In fact, the names are often used interchangeably. Additiona:names for this device include:chain-disc pump Liberation waterwheel (China)pater-noster pump chaplet pumpIn essence, the chain pump is a water ladder with an enclosed trough whichallows its use on steep inclines or vertically, as in Figure 3.19. Thisenclosed trough eliminates the spacing/depth ratio limit on the capacityof water ladder paddles, i.e., except for leakage losses, the entirespace between paddles or discs can be filled with water.A length of circular pipe <strong>com</strong>monly serves as the enclosed trough,while the circular discs pulled through it are often fitted with rubberor leather perimeter rings to reduce leakage between discs and the pipe.As in the water ladder, a driving sprocket or notched wheel engages the endlesschain at the upper level to pull it around. In vertical installationssuch as Figure 3.37, the chain is long enough to allow it to hang freebelow the pipe bottom. This lower pipe ,end is usually flared to facilitateentry of the discs into the pipe.
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MICROFICHEREFERENCELIBFUUWA project
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TABLE OF CONTENTS:.LIST OF FIGURES
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LIST OF FIGURES (CONT)Figure3.163.1
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LIST OF TABLESTable2.12.2a2.2b3.13.
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2find both new water lifting device
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4During the 3rd centuryB.C., Archim
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GIn 1698, Thomas Savery obtained a
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9the United States was starting set
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11engines, motors, transmissions, e
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Chapter 2Water LiftingPrinciples2.1
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15Table 2.2a Classification of wate
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2.2.1 Discharge or Capacity (Q)Disc
Page 26 and 27: (h) Drawdown (D) is the vertical di
Page 28 and 29: 21Tota I DynamicHeadI Total Static
Page 30 and 31: 23Vapor Pressure (P,)Suction Fricti
Page 32 and 33: Multiplying all these efficiencies
Page 34 and 35: 27NPSHR-Q, is also usually included
Page 36 and 37: 3.2.1.1 Bucket/BagUtilizing nothing
Page 38 and 39: handmade construction can be easily
Page 40: animal is returning to the top, the
Page 43 and 44: 363.2.1-S Counterpoise LiftThe coun
Page 45 and 46: 38to return the lever. Combinations
Page 47 and 48: 40Table 3.1Shadouf performanceLift
Page 49 and 50: (b)Figure 3.5 Scoop (a) used as sho
Page 51 and 52: ‘PIVOT-r- ----hFigure 3.6 Wzcer b
Page 53 and 54: 46water. The capacity of this devic
Page 55 and 56: - =7?=PIVOTCOUNTER WEIGHT\FLAP- VAL
Page 57 and 58: 50(a)ROLLER 7- HAND RAIL/SIDE - BY-
Page 59 and 60: 52flow in through a check-valve (e.
Page 61 and 62: 54exhaust valves for the steam (or
Page 63 and 64: 56Another significant difference be
Page 65 and 66: 58shaft), two other forms of these
Page 67 and 68: 60Among the simplest designs for a
Page 69 and 70: 62/HANDLEBARDISCHARGEHOSEfFOOTRE$TD
Page 71 and 72: HANDLE/CONNECTINGARMDISCHARGEFLAP V
Page 73 and 74: 663.3.1 WheelAfter many of the earl
Page 75: 68Table 3.2 Manually-operated paddl
Page 79 and 80: 72Table 3.3 records some of the per
Page 81 and 82: 74Several names which are also appl
Page 83 and 84: 76Table 3.5Zawafa performanceLiftDi
Page 85 and 86: 78noria and the discharge and head
Page 87 and 88: 80enclosed circumference can also b
Page 89 and 90: 82Most early tympanums were of the
Page 91 and 92: 84Table 3.6Tympanum performanceDiam
Page 93 and 94: 86sufficiently compact and lightwei
Page 95 and 96: 88of 3000 gpm or 5000 psig. Dependi
Page 97 and 98: SE;vlI - ROTARYBUCKET VANEU’C)Fig
Page 99 and 100: 92(a)AIRCHAMBERAIR FEEDERVALVEWASTE
Page 101 and 102: 94Table 3.8Ram performanceA. Typica
Page 103 and 104: COMPRESSEDAIRDEAofpctI5LT1EDUCTC II
Page 105 and 106: 98FLASHTANK .iJI 10 -NON-RETURNVALV
Page 107 and 108: Because the components are not yet
Page 109 and 110: 102air-lift pumps. The oscillation
Page 111 and 112: 104and from the impeller and confin
Page 113 and 114: 106making this type pump useful for
Page 115 and 116: 90s; 80iTi!g 700E 60W50SPECIFIC SPE
Page 117 and 118: 110to lubricate all or some of thei
Page 119 and 120: 112such variables as impeller size,
Page 121 and 122: 114GEAR HEADOR IVE SHAFTTO PRIME MO
Page 123 and 124: 116W(clFigure 4.6 (a) Thai-style ou
Page 125 and 126: 118DRIVINGSUCTIONDIFFUSERa- - =tQ,E
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DISCHARGELINE OISCHARGE RETURNLINEL
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-122which at $.20/kg, cost $6.00. H
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Table 5.1Manual power appl icat i a
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126water lifting device. Animals ar
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1285.4.1 WindWindmills are currentl
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130even saw use on the windy plains
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172HAL F CYLINDERSt------TO WATER L
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135a vertical shaft, the wind will
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--Table 5.3 Typical winchnil 1 clpp
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Table 5.4 Typical watermill applica
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141MEDIUM BREASTFigure 5.6 (a) Medi
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SLUICEGATEc, ~/I#/,.----- ------I L
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145-H-f -- WH---@II
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147with a 330,250 gpd capacity. Bat
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149Where electric power is not econ
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151electricity), the amount of use
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153of building and installing the d
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155II 300‘0083ooLoo93oo‘ootr000
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157Example G .l (after Molenaar, 19
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LOW LIFT VERTICAL PUA /lPI------PER
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Chapter 7Improvements and Research
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163example for further projects (Fa
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165Reynolds (1970) writes, " . ..ma
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16?BIBLIOGKAPlIYAddison, Ii., Ccntr
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169Committee on Water Supply Engine
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Gatz, C. A., Johnston Vertical Pump
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173Mother Earth News,1574.Ilandbook
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175Reynolds, I. II. , “High Duty
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177Svcndsen, M., "Irrigation Techno
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179APPENDIX
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Tabic;: A.2 Area conversions and ab
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Table A.4 Pressure conversions and
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Table A.6 Discharge conversions and
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Table'A.8 Specific speed (N,) conve
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ABHPDD- area- brake horsepower- dia
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