that if a mini hydro plant is to be installed in this river and it is desirable

That if a mini hydro plant is to be installed in this

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that if a mini hydro plant is to be installed in this river and it is desirable to have it working 70% of the time, then a value of 42.28 x 10 5 m 3 should be chosen as the design water flow. DATA The site conditions associated with estimating the annual energy production of a small hydro project are as follows: Items Related With Site Conditions Hydrology & Load. The model calculates the firm flow in the Hydrology & Load worksheet and it is copied automatically to the Energy Model worksheet. Items Related To Hydrology Analysis (For Flow Duration Curve below we require the Ave Monthly Flow Discharge – 12 months)
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Items Related To Load Characteristics The system characteristics associated with estimating the annual energy production of a small hydro project are detailed below. Items Related With System Characteristics Equipment Data As part of the RETScreen Clean Energy Project Analysis Software, the Equipment Data worksheet is used to specify the small hydro turbine(s) for the project. The results of this worksheet are transferred to the
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Energy Model worksheet. The user should return to the Energy Model worksheet after completing the Equipment Data worksheet. Items Related to Turbine Characteristics Items Related With Energy Production RETSCREEN EXPERT DATA REQUIRED INPUTS Hydro Turbine – Level1 1. Power Capacity (kW): 2. Initial Costs ($/kW): Equipment and installation costs.
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3. O&M Costs ($/kW-year): Hydro Turbine – Level 2 A) Resource Assessment 1. Gross Head (m): Drop in elevation at the site. Drop in elevation as measured from the end of the canal to the tailrace. 2. Max. Tailwater Effect (m): Maximum reduction in available gross head that will occur during times of high flows in the river. At most sites, during high flows, the tailwater level rises more than the level upstream of the intake and causes a reduction in the gross head. Consequently, during these periods, less power and energy are available. The tailwater effect can be significant, especially for low-head sites. 3. Drainage Area (km 2 ): Area of land that collects precipitation, which contributes to the flow of water in the river at the site. This value is used to estimate the mean streamflow at the site. 4. Specific Run-off (m 3 /s/km 2 ): Mean flow (m 3 /s) per km 2 drainage area. Normally in the range of 0.000 – 0.070. 5. Residual Flow (m 3 /s): Flow that must be left in the river throughout the year for environmental reasons. The residual flow is deducted from the available flow as part of the calculation of available energy. 6. Percent Time Firm Flow Available (%): Typical values range from 90 to 100%. B) Hydro Turbine 7. Design Flow (m 3 /s): Maximum flow that can be used by the turbine(s). For central-grid connected run-of-river projects the optimum design flow is usually close to the flow that is equalled or exceeded about 30% of the time. For isolated-grid and off-grid applications, the flow required to meet the peak load may be the deciding factor for selecting the design flow, provided that this flow is available .
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  • Spring '20
  • Design Flow, Cross flow, Natural River Flow, Hydro Project Software

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