Selection and optimization of turbines for juba barrage hydropower plant (Southern Sudan)‎

Abstract EN

In this work an investigation was performed to select the appropriate, economical size and type of turbines for Juba Barrage proposed plan.Using charts and empirical formulae a suitable type and configuration were reached.

According to the main site parameters, head and discharge, the turbine lies in the category of Bulb Kaplan turbine.

Using different plant options the plant size was optimized with the aid of the flow duration curve and hydro help and ret screen software's, the annual energy was estimated, accompanied with economical analysis.

Proposed new methodology for number of unit's selection was presented.

The design discharge is 1400 m3/s and the rated head is 7.32 m.

Total installed capacity is about 83 MW and the annual energy is about 533 GWh at 73% estimated capacity factor.

The optimum number of units is 9 sets of hydro turbine /generator of bulb Kaplan machines.

The runner diameter is 4.8 m running at 115.4 rpm.

The specific speed is of the order of 919.3.

KEYWORDS: Hydrology, Economics, Bulb Turbine