## Legend | |

To be filled by user | |

Output |

1. | TRENCH TYPE DIVERSION WEIR | ||

| FULL SUPPLY LEVEL | m | |

| DEPTH OF WEIR | m | |

| BED LEVEL AT WEIR | m | |

| DESIGN DISCHARGE | cumecs | |

| DISCHARGE 50% FOR FLUSHING | cumecs | |

a) | LOSSES AT TRASH RACK | ||

| Length of the Opening | m | |

| Width of the opening | m^{2} | |

| Gross Area of the trench | ||

| Trash Racks Flat Size | ||

| Thickness of Flat | ||

| Clear Spacing of Flat | ||

| No of Flat | ||

| Say No of Flat | ||

| Trench Area reduction due to Trash Racks | ||

| net area after deduction of trash racks area | ||

| an Net area through the trash rack bar considering 50% clogging | ||

| at Gross area of the opening | ||

| Velocity at the entrance of Trash Racks as per IS code 11388 PAGE-1 | 0.75 | |

| Trash rack loss | ||

b) | Gate loss | ||

| Velocity at gate | ||

| Gate loss hg | ||

c) | Entrance loss he | ||

| TOTAL LOSSES | ||

| HYDRAULIC GRADIENT LINE LEVEL AT TUNNEL INLET | ||

| BED LEVEL AT TUNNEL INLET | ||

2) | FROM WEIR TO GRAVLE TRAP CUM DESILTING TANK (MS PIPE) | ||

| DESIGN DISCHARGE | ||

| ADD 25% EXTRA FOR FLUSHING OF SILT PARTICALS | 1 in | |

| TOTAL DISCHARGE for 50% | ||

| BED SLOPE OF PIPE | ||

| INTERNAL DIAMETER OF PIPE | ||

| RADIUS OF PIPE | ||

| AREA OF FLOW | ||

| WETTED PERIMETER | ||

| HYDRAULIC MEAN RADIUS | ||

| Manning, roughness coefficient | ||

| Hence, VELOCITY GENERATED | ||

| REQUIRED DISCHARGE | ||

| FLOW VELOCITY | ||

| HEAD LOSS DUE TO FRICTION | ||

| LENGTH OF PIPE | ||

| REYNOLD NUMBER Re | ||

| FRICTIONAL COEFFICIENT f (Karman-Prandtle Eq.) | ||

| Pipe Radius | ||

| Average Roughness | ||

| FRICTIONAL COEFFICIENT | ||

i) | HEAD LOSS DUE TO FRICTION | ||

iii) | Entrance & EXIT LOSS | ||

| TOTAL HEAD LOSSES | ||

| HEAD GAIN ON A/C OF GRADIENT | ||

| HEAD GAIN > TOTAL HEAD LOSSES | ||

| HYDRAULIC GRADIENT LINE LEVEL AT OUTLET | ||

| BED LEVEL AT OUTLET | ||

3) | DESILTING TANK | ||

| DESIGN DISCHARGE | ||

| ADD 25% FOR FLUSHING IN DESILTING TANK | ||

| REQUIRED DESIGN DISCHARGE | ||

| LENGTH | ||

| FRICTION FACTOR IN CONCRETE | ||

| WIDTH | ||

| EFFECTIVE DEPTH | ||

| WETTED AREA MID SECTION OF TANK | ||

| WETTED PERIMETER | ||

| FLOW VELOCITY<2m/SEC | ||

| OTHER LOSSES IN DESILTING TANK | ||

a) | Transition loss ht at inlet | ||

| Angle of expansion in the Tank | ||

| loss coeff for expansion | ||

| Velocity in the Tank | ||

| Transition loss ht | ||

b) | Transition loss at outlet ht | ||

| Angle of contraction | ||

| (loss coeff for contraction varies from 0.1 - 0.5) | ||

| Velocity in the Tank | ||

| Flow Velocity | ||

| X-sectional area at outlet tunnel | ||

| Transition loss ht | ||

| TOTAL LOSSES | ||

| HYDRAULIC GRADIENT LINE LEVEL AT OUTLET | ||

| BED LEVEL AT OUTLET | ||

| HEAD AVAILABLE FOR ENTRANCE VELOCITY | ||

| CREST LEVEL OF SPILLWAY | ||

| MAX WATER LEVEL AT SPILL | ||

| TOP LEVEL OF THE TANK | ||

3) | FROM DESILTING TANK TO SURGE SHAFT / FOREBAY | ||

| DESIGN DISCHARGE | ||

| BED SLOPE OF PIPE | ||

| INTERNAL DIAMETER OF PIPE | ||

| AREA OF FLOW | ||

| WETTED PERIMETER | ||

| LENGTH OF PIPE | ||

| HYDRAULIC HEAD FOR INLET VELOCITY FROM FSL UP TO PIPE TOP | ||

| BELL MOUTH ENTRANCE k VALUE | ||

| BELL MOUTH ENTRANCE LOSS | ||

| INTERNAL DIA OF PIPE | ||

| HEAD UP TO CENTER OF PIPE | ||

| HEAD UP TO OUTLET OF PIPE | ||

| INTERNAL DIA OF PIPE | ||

| VELOCITY GENERATED AT OUTLET OF PIPE | ||

| | ||

| FLOW VELOCITY IN THE PIPE | ||

| N is the number of bend | ||

| bend coeefficient at 90 degree bend for smooth pipe | ||

| HEAD LOSS DUE TO FRICTION | ||

| LENGTH OF PIPE | ||

| Pipe Radius | ||

| (Average Roughness) For Wrought Iron & Steel | ||

| RELATIVE ROUGHNESS | ||

| FRICTION FACTOR FROM MOODY | ||

| HEAD LOSS DUE TO FRICTION Hf | ||

i) | HEAD LOSS DUE TO FRICTION Hf | ||

| VELOCITY GENERATED AT PIPE OUTLET | ||

| FLOW VELOCITY IN THE PIPE | ||

ii) | HEAD LOSS DUE TO BEND | ||

| DISCHARGE UP TO PIPE OUTLET | ||

| CAPACITY OF MS PIPE IS ADEQUATE | ||

i) | HEAD LOSS DUE TO ENTRANCE | ||

| Entrance loss | ||

ii) | EXIT LOSS | ||

| TOTAL LOSSES IN THE PIPE | ||

| HYDRAULIC GRADIENT LINE LEVEL AT TUNNEL OUTLET | ||

| BED LEVEL AT THE TUNNEL OUTLET | ||

| RESIDUAL WATER HEAD AT TUNNEL OUTLET | ||

| TOTAL HYDRAULIC LOSSES | ||

| SAY TOTAL LOSSES | ||

| FULL SUPPLY LEVEL IN THE FOREBAY / SURGE SHAFT | ||

| WATER LEVEL & NET HEAD CALCULATION | ||

| Water level at top of weir | ||

| center line of turbine at power house | ||

| Gross head available |

Penstock Detail

Idia (m) | L (m) | No. | Q (Cumecs) |

HEAD CALCULATION

| Weir to Intake cum Desilting Tank | |

| Water level at intake (pond level) | |

| TOTAL LOSSES | |

| Total losses from desilting to Forebay tank | |

| Normal Water Level at Forebay | |

| Minimum Draw Down Level (MDDL) | |

| center line of jet at power house | |

| Minimum Head Available | |

| Maximum Head Available at FSL | |

| Design head at normal flow level | |

| Surge Shaft to power house | |

| Minimum Head Available | |

| Total length of Penstock | |

| Design discharge | |

| Dia of the Penstock | |

| velocity in pipe | |

| K(protrusion factor) in steel | |

| K/D | |

| Reynolds Number Re | |

| friction factor (f) from moody's diagram | |

| Loss of Head | |

A) | FRICTION LOSSES IN THE MAIN PENSTOCK | |

| Net head available at turbine for power | |

| ht (Efficiency of Turbine) | % |

| hg (efficiency of generator) | % |

| Power Generated | |

| TOTAL FRICTION LOSSES | |

| Dia at bifurcation | |

| area of flow | |

| velocity in pipe | |

| K(protrusion factor) | |

| K/D | |

| Reynolds Number | |

| friction factor (f) | |

| Loss of Head |

Other losses

| Nos | k | ..... | Head loss |

for bell mouth entry | ||||

for first bend T-joint | ||||

for bend (bifurcation) app | ||||

for contraction at bifurcation | ||||

for other bends | ||||

valves | ||||

| | | Total other losses | |

| | TOTAL LOSSES IN PENSTOCK | | |

| | NET HEAD AT TURBINE | |

LEVELS

| Water level at intake (Pond Level) | |

| water level at desilting tank | |

| water level at Forebay | |

| center line of jet at power house |