tshwane - esi-africa.com

• Adriaan Kurtz

• Design Engineer

• City of Tshwane

• South Africa

Presenter Adriaan Kurtz Organisation City of Tshwane Email: adriaank@tshwane.gov.za Contact details: 012 358 3505 / 082 903 3123 CITY OF TSHWANE 2

ALTERNATIVE POWER

HYDRO POWER AND THE CITY OF TSHWANE

Layout of the presentation

• Introduction • Background • Type 1 Installation- Commercially viable

Hydro Installations • Type 2 Installation-Hydro Power on Reservoir

Sites • Type 3 Installation-Hydro Power in Chambers • Type 4 Installation-Low Head • Conclusion • Questions

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Introduction • City of Tshwane (6 370km²)

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Introduction

• City of Tshwane Areas

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Introduction

• Population

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Introduction

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Introduction

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Introduction

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Distribution of sites

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Background- Rand Water

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Klipfontein

Esselenpark

Vlakfontein

Background

Rand Water Rservoir TWL CoT Difference

Klipfontein 1693.8m 1160m 533.8m

Esselenpark 1616.4m 1419m 197.4m

Vlakfontein 1662.7m 1404.7m 258m

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Available Energy

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Available Energy

• Suggested Classification

• Type 1-Commercial viable Hydro Power

• Type 2-Hydro Power for Onsite Consumption

• Type 3-Hydro Power in Chambers

• Type 4 Installation-Low Head Hydro Power

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Turbine Principle

Available Energy

• Commercial Vialable Hydro Power

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Reservoirs

TWL (m.a.s.l)

Capacity (kl)

Pressure (m)

Flow (l/s)

Yearly Potential power

generation

(kWh) #

Garsfontein 1 508,4 60 000 165 1850 3 278 980,2

Wonderboom 1 351,8 22 750 256 470 1 292 471,4

Heights LL 1 469,6 55 050 154 510 843 672,8

Heights HL 1 506,9 92 000 204 340 745 061,7

Soshanguve DD 1 249,5 40 000 168 400 721 859,0

Waverley HL 1 383,2 4 550 133 505 721 483,1

Akasia 1 413,8 15 000 190 340 693 930,0

Clifton 1506.4 27 866 196 315 663 208,0

Magalies 1438.0 51 700 166 350 624 107,3

Montana 1387.6 28 000 82 463 407 828,9

Total calculated yearly power generation in Tshwane from 10 reservoirs - (Nearest

10 000 kWh) 10 000 000

Table 1: Potential yearly hydropower generation capacity at ten reservoirs

in the Tshwane Water Supply Area

Type 1-Commercially Viable

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P1-18

Energy Generation from WDS

Potential sites in Tshwane Geographically speaking the City of Tshwane has a lower elevation then the bulk service Reservoirs of Rand Water which is the main water supply. Water is then distributed through a large water system that includes 160 reservoirs, 42 water towers, 10677 km of pipes and more than 260 pressure reducing installations (PRV’s) that operates at pressures of up to 250 m.

Type 1-Commercially Viable

P1-19

Energy Generation from WDS

Type 1-Commercially Viable Example Garsfontein Reservoir

P1-20

Energy Generation from WDS

Potential for a week = 82 097 kwh Annual potential = 4 257 309 kwh

Pavg upstream = 117,4 m Qavg = 0,671 m³/s Data since April 2011 and Pavg upstream = 120 m Qavg = 0,77 m³/s

Required turbine capacity 550 kW or 950 kW depending on operational approach adopted

Type 1-Commercially Viable Example Garsfontein Reservoir

Type 2- Pump as Turbine

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Type 2- Crossflow

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Type 2- Pump as Turbine-Annlin

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Type 2- Pump as Turbine-

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Type 2- Pump as Turbine-Annlin

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Type 2- Pump as Turbine-Annlin

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Type 2- Pump as Turbine- Annlin

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Type 3-Hydro power in Chambers

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Type 3-Hydro power in Chambers

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Type 3-Hydro power in Chambers

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Type 3-Hydro power in Chambers

Type 3-Hydro power in Chambers

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Type 3-Hydro power in Chambers

Type 3-Hydro power in Chambers

Type 3-Hydro power in Chambers

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Type 4-Hydro power Low Head

Type 4-Hydro power Low Head

Hydro power

• BENEFITS – Security

– Alarms

– Pressure and Control Management

– Electric Fencing

– Telemetry

– Monetary

PAYBACK PERIOD

??

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Conclusion

• We can use Conduit hydropower to transform excess available energy in pressurised conduits (pumping or gravity) into clean, renewable hydroelectric energy by means of any sort of turbine to have monetary or other benefits.

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Questions?

• ?

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