flat-plate solar collector is used to heat atmosphericair
Chapter 8, Problem 8.17(choose chapter or problem)
flat-plate solar collector is used to heat atmosphericair flowing through a rectangular channel. The bottomsurface of the channel is well insulated, while the topsurface is subjected to a uniform heat flux qo, which isdue to the net effect of solar radiation absorption andheat exchange between the absorber and cover plates.(a) Beginning with an appropriate differential controlvolume, obtain an equation that could be used todetermine the mean air temperature Tm(x) as afunction of distance along the channel. Solve thisequation to obtain an expression for the mean tem-perature of the air leaving the collector.(b) With air inlet conditions of ?0.1 kg/s andTm,i?40C, what is the air outlet temperature ifL?3 m, w?1 m, and qo?700 W/m2? The spe-cific heat of air is cp?1008 J/kg?K
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