Ultra low head turbine is the turbine type that accommodate in the site having head less than 5 m and discharge of above 0.5 cubic meter per second.It works on the principle of static pressure differences and can be installed on the small riverlets, man made canals and Natural

2. FINAL PRESENTATION ON
Study of Ultra Low Head Turbine
for Nepal

3. TEAMWORK
NISCHAL POKHAREL (26)
PRADEEP PARAJULI(30)
PRATIK KOIRALA(36)
REJIT DULAL(42)

4. ACKNOWLEDGEMENT
Project Supervisor
Prof. Dr.- Ing. Ramesh Kumar Maskey
Department of Civil and Geomatics Engineering
Project co-supervisor
Dr. Hari Prasad Neopane
Associate Prof. & EnPe-MPPOES
Department of Mechanical Engineering
Project Co-ordinator
Mr. Anup K.C.
Department of Mechanical Engineering

5. PROJECT OVERVIEW
Background
 Objectives
 Literature review
 Ultra low head(ULH) turbine : Introduction
 Operation principle
 Methodology
 Work accomplished
 Problem faced
 Conclusion


6. BACKGROUND
Introduction
Hydropower
Problems
Nepal is known to be top nation of the
world in terms of water resources.
Solutions
More than 6000 flowing rivers.
Yet Energy Crisis

7. CONTD…
Introdution
Insufficient
no. of
hydropower
Problems
Solutions
Topographicsal
condition(mostly
in hilly)
Few in Terai
High cost of
installation of
big hydropower

8. BACKGROUND
Introdution
Problems
Solutions
Increase in number of hydro
powers
Proper distribution of hydro
powers
Micro hydropower and ultralow
head hydropowers

9. OBJECTIVES
Design and the installations arrangement of the
ultra-low head turbine
Findings regarding the aesthetics of the ultra-low head turbine, its’
reliability, functionality and selection of sites and further
proceedings.
Investigate the existing hydropower and identify core issues for very
low head hydropower

10. LITERATURE REVIEW OF
NEPAL
PELTON
24%
KAPLAN
7%
0%
PELTON
FRANSIS 16%
69%
0%
Turbine type distribution in major hydro powers
constructed
KAPLAN
26%
FRANSIS
58%
Turbine type distribution in hydro powers under
construction
The status of type of hydropower turbine distribution

11. For more info . . .
List location or contact for specification (or other related documents)

12. Ultra low-head turbine
Head :
1m to 5 m
Applicable in
even natural
or man-made
rivers and
canals with
little or no
water storage
capacity
Static
pressure
difference
principle

13. OPERATIONAL PRINCIPLE
Static pressure difference principle
Fig: static pressure difference in ultra low head turbine

14. CONTD …
Different form
conventional approach
Geometrically similar to
middleshot waterweel
• Difference lies in principle .
Velocity driven and pressure
difference driven
Velocity incensement
unlink conventional

15. CONTD..
 Force due to pressure difference
Counteracting force due to accleration

16. METHODOLOGY

17. WORKS ACCOMPLISHED
I. Visited to Rossi khola canal:

Rectangular with uniform cross section


Discharge calculation:







width 201.5 cm and depth 130.5 cm
Floatation method
Total distance travelled= 630.5cm = 6.305m
Average time taken = 11.223 sec
Surface velocity, Vsurface= 0.5618 m/sec
Mean velocity= k*vsurface =0.74 * 0.5618= 0.4157m/sec
Discharge obtained, Q=A * Vmean =1.093 m^3 /sec
Discharge suitable for ultra low head turbine

18. CONTD.
II. First Model Preparation:

Model overview:



Cylindrical
Made up of wooden plank and tin
Model specification:






Diameter of the faces= 24.5cm
Length of the blades= 38cm
Height of cylinder= 38cm (with faces of thickness 1cm each)
Width of each blade= 3cm
Acute angle made by a blade with the face is given by,
Sinβ= (36/38)
=> β= 70º (approx.)
*(The model is just to understand the “static pressure difference
principle”)

19. CONTD..

Testing of the model
o
o
o
o
Tested in Rossi Khola canal
Speed of 20 rpm in anticlockwise direction.
Not according to our operating principle.
Reason for this deviation.

20. CONTD…


21. CONTD....


22. CONTD…..

Testing of the model
 To
be tested in canal nearby Fluid Mechanics
laboratory
 Design of the model and assembly
 Bearing and labyrinth used

23. 
Fig: Design of the turbine and its assembly

24. Fig : Isometric view of the turbine (vertical)
Fig : Front view of the turbine

25. Fig : Isometric view of the turbine (inclined)

26. 

Totally new concept resulting in very
few reference material
Problem in understanding the operating
principle; failure of our first model as
per operating principle proves this

27. EXPECTED WORK SCHEDULE
S.N
Activity
September October
1.
Literature review
2.
Proposal Submission and
proposal defence
3.
Site visit status analysis of
Hydropower
Progress
report
midterm presentation
and
5.
Site
selection
preliminary
work
design
and
for
6.
Final Presentation
November
December
Janaury

28. ACTUAL WORK SCHEDULE
S.N
Activity
September October
1.
Literature review
2.
Proposal Submission and
proposal defence
3.
Study of lawn blades and
site visit
Model Preparation
5.
Progress
report
midterm presentation
6.
Testing of the model and
design and new model
preparation
7.
Final Presentation
and
November
December
Janaury

29. CONCLUSION


Ultra-low head turbine works could be the icing on the cake
Hope to continue in this path for the detail design and simulation
of this ultra-low head turbine for economic and reliable hydro
energy prospects

30. THANK
YOU