Bloemwater Conduit Hydropower Plant P1-1. Bloemwater Conduit Hydropower Plant

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1 Bloemwater Conduit Hydropower Plant P1-1 Introduction Collaborating organisation on WRC project Has infrastructure that meet hydropower development criteria Has a direct use for the electricity Financially it makes sense P1-2 1

2 System layout System layout De Hoek reservoir Uitkijk reservoir 105.7km 1 170mm Ø Pre stressed Concrete De Hoek Res 22.7 Ml Uitkijk Res 9.1 Ml Brandkop Res 136 Ml Elevation (m) Brandkop reservoir Uitkijk Brandkop profile De Hoek Uitkijk profile HGL maximum flow Chainage (m) 2

3 Uitkijk PRVS P1-5 Uitkijk Reservoir P1-6 3

4 Uitkijk PRVS P1-7 Pilot plants (Uitkijk De Hoek reservoir ΔHmax = 75,5 m ΔQmax = 1,59 m³/s Elevation (m) Uitkijk reservoir Longitudinal profile HGL static conditions HGL maximum flow Chainage (m) P1-8 4

5 Brandkop Reservoir P1-9 PRVS (Brandkop P1-10 5

6 PRVS (Brandkop P1-11 Uitkijk reservoir ΔHmax = 83,2 m ΔQmax = 1,42 m³/s Elevation (m) Brandkop reservoir Longitudinal profile HGL static conditions HGL maximum flow Chainage (m) P1-12 6

7 Generating potential (Uitkijk to Brandkop) Q40 = 0,57 m 3 /s: ΔH = 66,3 m Q70 = 1,00 m 3 /s: ΔH = 47,1 m Q100 = 1,42 m 3 /s: ΔH = 17,5 m P1-14 7

8 Pilot plant (Data recording) P Channel 1 Channel 2 Average Pressure 40.0 Pressure head (m) Available pressure /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/2012 Date P1-16 8

9 Electricity demand Bloemwater P1-17 Electricity demand probability P1-18 9

10 Pilot plants (Brandkop IREM Crossflow turbine and generator Nominal voltage: three/single phase 400/230V 50Hz Generated electric power: P = ±96 kw Net head axis turbine: H = ±40 m Flow :Q = ±350 l/s ECOWATT Micro hydroelectric power plant type TBS Cross Flow turbine in stainless steel type Synchronous generator type AZ 100 Revolution multiplier by cogged driving belt Automatic flow regulation (with electric actuator 230Vac) Manual butterfly valve Pilot plants (Brandkop Electric Distribution Board Mod. CT a voltmeter, a digital frequency-meter, ammeters indicating the total current distributed by the generator, ammeters indicating the current drawn by the consumers magneto thermal, which protects the generator from possible short circuits on the consumer line electronic voltage relay, operating a warning buzzer and a visual signal in the event the voltage variation exceeds the limits Electronic Regulating System RMP 12000/B with water dissipation resistances box unit, which include the electronic control board to micro processor and the power control transient voltage protection (TVP) resistors for dissipation equipped with 9 x 12 kw 10

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13 Although no final total cost could yet be determined for the Bloemwater CHP the main components include: Pressure-, flow measurements and dynamic analysis Electricity consumption data Pipe and valve work Imported cross-flow turbine (Euro) Electrical connection to BW offices Turbine room Monitoring system Data logging and communication system Installation and implementation Monitoring and evaluation Total costs is approximately R2,75 million (payback period of 74 months) P1-25 In comparison: This hydropower plant - ±R28.5 Million/MW Van Stadens Wind Farm near PE costs R475 million for MWh/year i.e. R52 Million/MW P

14 Comparison Foot print (1 MW) Wind turbine Conduit hydropower P1-27 Comparison Cost of generating 1 MW R20 to 28 Million Wind turbine Conduit hydropower P

15 Comparison Environmental impact Wind turbine Conduit hydropower P1-29 Comparison Availability Wind turbine Conduit hydropower P

16 Way forward Turbines and generators are existing technologies The application is new in SA Implementation can be done immediately There are still some grey areas regarding the regulatory and legislative Further development of Bloemwater s renewable energy resource Other opportunities P1-31 THANK YOU! Energy generation from distribution systems P