Posted by: DHE Rwanda | July 28, 2012

The Civil Works – an Overview


A view from the bottom up – very little of the system is or will be visible from this point


The hydroelectric system has 6 main civil works components.  First is the weir, or small dam, that diverts a portion of the water away from the river.  The second is the headraise, a PVC pipe that takes the water from the sluicegate of the weir to the third component, the forebay.  The forebay, also known as the settling tank, is a large bathtub-shaped concrete tank where sediment in the water will sink to the bottom of the tank to keep the water going through the rest of the system clean.  Next the water flows into a PVC pipe of a slightly smaller diameter than the headraise.  This is known as the penstock.  The penstock runs down the steep, uneven hillside to the kiosk.  The kiosk is a small brick building that will house the turbine and the electrical systems which will charge the battery boxes.  The last component is the tailraise, or another pipe running out of the turbine which returns the water to the river.

– Kurt


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