ƒ

H.V. Pre – confer. workshop

ƒ

27

th

July. 2010

ƒ

Shogo Nakamura

(Voith Fuji Hydro, K.K.)

Development of
broad band micro 
tubular turbine

1.

Potential micro hydro power in Japan

2.

Broad band micrro tubular turbine

3.

Application

Presentation Contents

page 3 - 5

page 6 - 12

page 13 - 17

BOD Presentation – OU xxx – Autumn 2008.ppt  | 2

Category

Nos

Agricultural water

1,000

Landslide prevention

50,000

Water supply / 
sewage

1,200

River sustainable
discharge

340

1. Potential micro hydro power in Japan 

Landslide prevention
River sustainability

Irrigation canal

Sewage / Water supply

Industrial pipe line 

1. Potential micro hydro power in Japan 

Constant discharge

Additional 

variable discharge 

Adjustable turbine

More APP 

Save variable resource

Annual Flow duration

Days

Discharg

e

Customer requests adjustable turbine to catch more energy

1. Potential micro hydro power in Japan 

2. Broad band micro tubular 

Conventional Micro Turbine

9 Propeller turbine (fixed RV) + fixed GV

9 Propeller turbine (fixed RV) + adjustable GV

Low cost, but low turbine efficiency

Voith Fuji Micro Tubular

9 Kaplan turbine (adjustable RV) + fixed GV

Low cost, and high turbine efficiency

2. Broad band micro tubular 

High performance

9

Broad-band application

9

High efficiency  :  85%

9

Wide operating range

9

Excellent cavitation performance

9

Non slip timing-belt (high efficiency)

Low cost & Easy maintenance

9

Standard design + Mass products components

9

Grease lubrication (no need lub. oil)

Application to various arrangements

2. Broad band micro tubular 

Wide Application Range

2. Broad band micro tubular 

40

50

60

70

80

90

100

110

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Discharge

Relative turbine efficiency (%)

Adjustable RV
Fixed GV

Rated discharge

Fixed RV
Adjustable GV

High efficiency & wide operation range

2. Broad band micro tubular 

Electric motor 

Drive belt 

Runner vane 

adjustable 

mechanism 

Runner vane adjustable mechanism

2. Broad band micro tubular 

Standard design 
Mass products components
Grease lubrication

3 phase induction motor
Volt : AC200V、400V
Rotating speed  : 1500min-1(50Hz)/ 1800min-1(60Hz)

Generator

2. Broad band micro tubular 

3. Application to various arrangements

Kasai : Sewage drains        Shirakawa village

Siphon arrangement

Saginuma / Egasaki : Service water

Single arrangement      Serial arrangement

3. Application to various arrangements

Case 1    Kasai sewage plant

• Start with vacuum pump
• Stop with vacuum breaker valve

Siphon

Vacuum breaker

Tank

3. Application to various arrangements

Vacuum breaker

Vacuum pump

Case 2    Morigasaki sewage plant

• Start with vacuum pump
• Stop with vacuum breaker valve

3. Application to various arrangements

Intake

Tailrace

Case 3    Nurukawa power station

Start with vacuum pump 

Stop with vacuum breaker valve 

3. Application to various arrangements

Case 4    Egasaki

Serial arrangement for water supply (for high head application)