Aplane wall of thickness 0.2 m and thermal conductivity 30 w/m middot k having uniform volumetric heat generation of 0.4 mw/m^3 is insulated on one side, while the other side is exposed to a fluid at 92 degree c. the convection heat transfer coefficient between the wall and the fluid is 400 w/m^2 middot k. determine the maximum temperature in the wall. ans: t_0 = 519 c

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