Generating stations 22

 Question = it has in estimated that a minimum run - off  of approximately 94 m³/sec. will be available at a hydraulic project with a head of 39 m . determine the firm capacity and yearly gross output . ?

Solution = weight of water available is W = volume of water × density. = 94 × 1000 , = 94,000 kg/sec.. , 

» water head = H = 39 m , 

» work done/sec.. = W × H , = 94000 ×9.81 ×39 watt , = 35,963 ×10³ watt , or , 35,963 kW , answer ✓  ( this is gross plant capacity )

» (2)  yearly gross output = firm capacity × hours in a year , = 35,963 × 8760 , = 312670680 kWh , or , 312 × 10⁶ kWh , answer ✓ 

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