Question

241 2. (25 p) Consider the design of a pumped-storage-hydro system located next to a pond. Suppose the demand is estimated to be 10 kWh/day with a peak demand of 3 kW. A tank is placed on a hilltop 100 ft above the turbine/generator. Connecting pipe runs 800 ft. a) Assuming an average of 15% head losses in the pipeline and 80% conversion efficiency for the turbine/generator, how many gallons of water needs to flow from the upper tank to the pond in a day's time? (specific weight of water y- 8.34 lb/gal) b)Assuming piping losses are 20% during peak demand,what flow rate from the tank would be needed to supply 3 kW peak? c) Using the choices given in piping losses table, what size pipe would keep losses to around 20% at peak demand? MI

Answer 1

ven) olt liar leva <\グ! Pond van 0.85×800 XD, 205 : hturbine 201. 264m ckou PCon

éon

C).FTero the Qsbona.coltuloturns. the pvc pipe.L3ใ0e3 thc