Upcoming SlideShare
Loading in...5
×

# Characteristic curves of a turbine

7,726
-1

Published on

Published in: Education, Technology, Business
1 Comment
2 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
Your message goes here
• Guys am working on hydropower potential in water dristribution line. I intend to theoretically model/calculate the pressure and flow velocity difference after insertion of turbine. Can any one help out on this

Are you sure you want to  Yes  No
Your message goes here
No Downloads
Views
Total Views
7,726
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
324
Comments
1
Likes
2
Embeds 0
No embeds

No notes for slide

### Characteristic curves of a turbine

1. 1. Characteristic curves of a Turbine • These are curves which are characteristic of a particular turbine which helps in studying the performance of the turbine under various conditions. These curves pertaining to any turbine are supplied by its manufacturers based on actual tests. • The data that must be obtained obtained in testing a turbine are the following:
2. 2. 1. The speed of the turbine N 2. The discharge Q 3. The net head H 4. The power developed P 5. The overall efficiency η 6. Gate opening (this refers to the percentage of the inlet passages provided for water to enter the turbine)
3. 3. • The characteristic curves obtained are the following: • a) Constant head curves or main characteristic curves • b) Constant speed curves or operating characteristic curves • c) Constant efficiency curves or Muschel curves
4. 4. • Constant head curves: Maintaining a constant head, the speed of the turbine is varied by • admitting different rates of flow by adjusting the percentage of gate opening. The power P developed is measured mechanically. From each test the unit power Pu, the unit speed Nu, the unit discharge Qu and the overall efficiency  are determined. o
5. 5. • • • • • The characteristic curves drawn are a) Unit discharge vs unit speed b) Unit power vs unit speed c) Overall efficiency vs unit speed Con
6. 6. • Constant speed curves: In this case tests are conducted at a constant speed varying the • head H and suitably adjusting the discharge Q. The power developed P is measured • mechanically. The overall efficiency is aimed at its maximum value. • The curves drawn are
7. 7. • Constant efficiency curves: These curves are plotted from data which can be obtained • from the constant head and constant speed curves. The object of obtaining this curve is to • determine the zone of constant efficiency so that we can always run the turbine with • maximum efficiency. • This curve also gives a good idea about the performance of the turbine at various • efficiencies.
8. 8. Main Characteristic curves of a Pelton turbine
9. 9. Main Characteristic curves of a Pelton turbine
10. 10. Main Characteristic curves of a Pelton turbine
11. 11. Main Characteristic curves of a Kaplan turbine
12. 12. Main Characteristic curves of a Kaplan turbine
13. 13. Main Characteristic curves of a Francis turbine
14. 14. Main Characteristic curves of a Francis turbine
15. 15. Operating Characteristic curves of a turbine
16. 16. Operating Characteristic curves of a turbine
17. 17. Operating Characteristic curves of a turbine
1. #### A particular slide catching your eye?

Clipping is a handy way to collect important slides you want to go back to later.