Consider a 210 mw steam power plant that operates on a simple ideal rankine cycle. steam enters the turbine at 10 mpa and 500c and is cooled in the condenser at a pressure of 10kpa. assuming an isentropic efficiency of 80% for the turbine and 90% for the pump. determine: a) the thermal efficiency of the cycle b) the mass flow rate of the steam c) quality of the steam at the turbine exit

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