Apelton wheel nozzle, for which cy 0.97, is 400 m below the surface of a lake. the jet diameter is 80 mm, the pipe diameter is 0.6 m, its length is 4 km and f 0.032. the buckets deflect the jet through 165 and they run at 0.48 times the jet speed, bucket friction reducing the velocity at outlet by 15 percent of the relative velocíty at inlet. mechanical efficiency 90%. determine: a)-the flow rate b)-he shaft power developed by the turbine

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c