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Mini Hydropower Technology III-Physics-Project Presentation, Slides of Physics
This is project presentation for Physics course. Instructor and project supervisor was Prof. Alpana Vishvajit at Aliah University. It includes: Mini-hydropower, Technology, Waterwheel, Design, Parshall, Flume, Hydrokinetics, Converters, Soil, Erodibility
Typology: Slides
2011/2012
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Waterwheel Design
Introduction
Presentation Layout
Recommendations 2
Problems
Open Channel Design
Summary and Conclusions
Parshall Flume
It was considered that in Mechanical laboratory the arrangement could be made for hydropower generation.
For this purpose hydraulic bench was used
Artificial channel design
Introduction
Waterwheel Design
5
shaft x
- By continuity equation
Waterwheel Design
7
Q = A× V
Q = 60 l / s
V = 2.88cm / s
- For this velocity water wheel was designed as
- Let h=height of vane=12cm=0.12 m=4.72in
- Width=b’=0.14m
- Area= A=b’h= 0.0168 m*^2
- F= Force of water on blades or vanes (N)
Waterwheel Design
Waterwheel Design
10
By trigonometry
Total number of blades/ vanes =360/86.96=4. Use 5 vanes
0.25’’^ x 0
4. Angle between two vanes=90 3.04 86.
x = sin-1 ( 0.25) = 3.04^0
v=Velocity of vane tip
Waterwheel Design
12
v = r ×
v = 0.13 ×
= 7.57 ×10-3 rad / s
P = T ×
P = 9.47 ×10-5 × 7.57 ×10-
P = 9.1×10-8 watt
Determine maximum permissible depth of flow, or maximum permissible velocity of flow, for lining material.
Select channel geometry and channel lining suitable for the design flows being considered.
Design of Channel…
Channel Lining Material
- The lining material determines factors such as the hydraulic resistance of the waterway.
- Choice should be based on economic considerations, such as initial capital outlay, and the cost of labor and machinery required for maintenance.
Design of Channel …
- P=Wetted perimeter=b+2d
- b=Bed width
- d=Flow depth
- s=Longitudinal slope of the water surface
- n=Manning’s roughness coefficient
Design of Channel …
- Four Main Procedures
- Each is an extension of the Manning’s equation
Best hydraulic section procedure. Velocity-limited procedure. Normal-depth procedure. Depth-limited procedure.
Design of Channel …
- Discharge is calculated by following formula
- Q= Discharge (m^3 /s)
- Z= 1 for metric system
- Z=1.46 for US system
Design of Channel …
20
z × A ×R(2 / 3) S(1/ 2) Q = (^) n
Manning's Coefficient n 0. slope s 0. Bed With b 0.20m Flow Depth d 0.10m Area A=b*d 0.02m^2 Wetted Perimeter P=b+2d 0.40m Hydraulic Radius R=A/P 0.05m Velocity V 1.05m/s Discharge Q 0.0218m^3 /s