water turbine project caruachi power plant/df7baa31.pdf · 2006. 4. 22. · turbine selection...

Water Turbine ProjectWater Turbine ProjectCaruachi Power PlantCaruachi Power Plant

By: By: Erika SilvaErika SilvaNicolas Nicolas MarchalMarchal

March 2006

TURBINE SELECTION MTM168


CONTENTCONTENT

1.1.Selection and location of the projectSelection and location of the project2.2.Previous dataPrevious data3.3.Turbine selectionTurbine selection4.4.Turbine CalculationsTurbine Calculations5.5.Turbine selection Turbine selection -- ResultsResults6.6.Remarks and Conclusions Remarks and Conclusions


Selection and location of the projectSelection and location of the project

The hydropower plant Caruachi is located over the Caroni river, 59 kmdownstream of Guri’s reservoir in the south east of Venezuela - South America.


Previous dataPrevious dataName of the Project: Caruachi

Water Levels (m)Head water Tail water

Nonfrequent maximum head 92,55 58,40

Maximum normal head 91,25 55,25

Average 91,00 54,90

Minimum normal head 90,25 53,75

Nonfrequent minimum head 88,55 52,15

188,00Maximum power

180,00Nominal power (nominal head 35,60)

177,00Minimum power

MWTurbine Power

The nominal flow Q = 556 m3/s


Turbine SelectionTurbine Selection

mH 37max =

Selection Selection –– type of turbinetype of turbine

Net head

•The main parameter to take intoaccount to select the turbine is the net head


Turbine CalculationsTurbine Calculations

Turbine Calculations

Characteristics Project results

Specific speed 551 rpm

Power 184 MW

Rotational Speed 106 rpm

Runner Diameter 7.7 m

Runner weight 174 ton

Suction height (-) 9.27 m

Penstock diameter 11.3 m

Type of Spiral case Concrete

Remarks:

• The formulas used in the calculationswere empirical.

• The efficiency was assumed as 90 %.

• In the Power calculation was used theNominal head from the previous data.



Spiral Case - Main DimensionsDimensions

(mm)Project result

B2 9520

C2 13800

D2 11780

E2 11300

F2 12340

G2 10580

H2 9830

I2 3090

L2 12590

M2 9860

Spiral Case – main dimension

• All the dimension values are function of the runner diameter.



Draft Tube - Main DimensionsDimensions

(mm)Project result

Ht 2180

N 15390

O 10710

P 9470

Q 4825

R 9290

S 35610

T 9240

Z 21300

Draft tube – main dimensions

•All the dimension values are functionof the runner diameter.


Comparison with Caruachi PlantComparison with Caruachi PlantName of the Project: Caruachi

Characteristics Original Data Project results

Type of turbine Kaplan Kaplan

Normal Head 35.6 m 35.6 m

Hmin 34.5 m 34.5 m

Hmax 37.0 m 37.0 m

Potencia nominal 180 MW 184 MW

Nominal flow Q 556 m3/s 572 m3/s

Runner Diameter 7.8 m 7.7 m

Nominal Velocity 94.74 rpm 106 rpm

Specific speed 563.8 rpm 551 rpm

Runner Weight 182.30 ton 174 ton

Diameter of the hub 3330 mm 3300 mm

Height of the runner 2676 mm 3087 mm

Diameter of the guide vanes 9360 mm 9186 mm

Height of the guide vanes 3230 mm 3929 mm

Suction height (-) 15.33 m (-) 9.27 m

Spiral case type Concrete Concrete

Penstock diameter Cross section 11.3 m

Remarks:

• In general, values very similar with the original data.

•The real Suction height is bigger 40% (Cavitation process)

• There is not penstock in Caruachi project(Cross section channel)


Runner dimensionsRunner dimensions

Runner dimensions

Caruachi (m)

Project -Calculations

(m)

Runner diameter (D1) 7.80 7.70

Hub diameter (dh) 3.30 3.12

Diameter of the guide vanes (Do) 9.360 9.186

Height of the guide vanes (Bo) 3.230 3.929

Comparison with Caruachi PlantComparison with Caruachi Plant

•The biggest variation was the value of the height of the guide vanes


Comparison with Caruachi PlantComparison with Caruachi Plant

Spiral Case - Main DimensionsDim.(mm) Caruachi

Project result

B2 9520

C2 13800

D2 11780

E2 11300

F2 9360 12340

G2 7445 10580

H2 7800 9830

I2 3090

L2 12590

M2 9860

Spiral case – main dimensions

• Different results, around 20%


Comparison with Caruachi PlantComparison with Caruachi PlantDraft Tube - Main Dimensions

Dimensions (mm) Caruachi

Project result

Ht - 2180

N 14840 15390

O 10620 10710

P 8020 9470

Q 4945 4825

R 8600 9290

S 37000 35610

T 12940 9240

Z 20500 21300

Draft tube – main dimensions

T


ConclusionsConclusions• Particularity of Caruachi Power Plant : no penstock

• Kaplan turbine is the most suitable for Caruachi project

•Theoretical analysis is a bit different than the original design

⇒Not considering all the parameters but really good approximation

• Get more information about site conditions, civil work, electricity demand, environmental situation and impact as well as budget…

• Even if companies has their own procedure to design turbines

⇒Literature really close and gives very good information for the design

Confirmed by our calculations and the real values of Caruachi


Thanks!Thanks!

Water Turbine Project Water Turbine Project -- Caruachi Power PlantCaruachi Power Plant

By: By: Erika SilvaErika SilvaNicolas Nicolas MarchalMarchal

water turbine project caruachi power plant/df7baa31.pdf · 2006. 4. 22. · turbine selection...

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