Feasibility study to duplicate Renewable Energy output at the Shek Pik Reservoir using Wind Energy

1- Remarks of existing System

FPV system at Shek Pik Reservoir

The pilot system has been successfully installed at Shek Pik Reservoir in February 2017 for supplying electricity to the nearby pumping station of the reservoir. The current output and cumulative output are as below:

Total Electricity Generated:                                446,732 kWh (5 years)

CO2 Reduction:                                                     312,712 kg

Electricity Generated:                                      89,346kWh per year

Project Cost:                                                       3.5 Million HKD

Recovery of investment:                                 34 years

CO2 Reduction in 34 years :                           2,128 tons of CO2

2- WIND ENERGY PROPOSAL

Our proposal is to duplicate the current output of this system 90,000 kWh per year, by using an array of 34 Vertical Axis Wind Turbines (VAWT) deployed along the bridge (see pictures).

Average output power per VAWT:                   315 watts

Electricity generated per year:                          2,759 kWh per year

Amount of VAWTs:                                               34

Total Electricity generated per year:             93,806 kWh per year

Estimated Project Cost:                                   reduced by around 40%

Recovery of investment:                                  19 years

CO2 Reduction in 34 years:                             2,234 tons of CO2

Alternative:

Deploy 1 big VAWT over the house plus 24 VAWT along the bridge, 12 on each side (see pictures)

Energy Type

Electricity Generated per year (kWh)

Cost (HKD mil)

Recovery of Investment base on FiT program (Year)

CO2 Reduction per year (tons)

Solar

89,346

3.5 

34

63

Wind

93,806

around 40% less
19
66



Wind Turbine Solution:
Alternative:

According to paper from “The Chartered Institution of Building Services Engineers Hong Kong Branch” where they describe Floating PV systems, the main problems might be related to wind speed.

Disadvantages versus Advantages

Floating PV

Wind Turbines

  • Environmental impact

❌

✅

  • Occurrence of waves due to wind velocity

❌

✅

  • Wind speed effects on the structure

❌

✅

  • Effect of wind speed on power generation amount

❌

✅

  • Project Cost

❌

✅

  • Recovery of Investment

❌

✅

  • Electricity Generation (per year)

✅

✅

  • CO2 Reduction

✅

✅

Note: In the system, we are proposing with Wind Turbines, we turn ALL these disadvantages into advantages because the wind speed is the main factor in wind energy production

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