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 | m2 | ||
| 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 |