A flat-plate solar collector, as shown in Fig. 1, is used to heat water by having water flow through tubes attached at the back of the thin solar absorber plate. The absorber plate has an em issivity and an absorptivity of 0.8. The top surface (x = 0) temperature of the absorber is To = 35 °C, and solar radiat ion is incident on the absorber at 600 W/m? with a surrounding temperature of 0 °C. The convection heat transfer coefficient at the absorber surface as 8 W/m² K. Assum ing constant thermal conductivity and no heat generation in the wall, express the differential equation and the boundary conditions for steady one- dimensional heat conduct ion through the wall, obtain a relation for the variation of temperature in the wall by solving the differential equation, and iii. i ii determine the net heat flux, ġo absorbed by the collector e, a, T, Absorber plate Water tubes Insulation Fig. 1

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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A flat-plate solar collector, as shown in Fig. 1, is used to heat water by having water
flow through tubes attached at the back of the thin solar absorber plate. The absorber
plate has an emissivity and an absorptivity of 0.8. The top surface (* = 0) temperature
of the absorber is To = 35 °C, and solar radiat ion is incident on the absorber at 600
W/m? with a surrounding temperature of 0 °C. The convection heat transfer coefficient
at the absorber surface as 8 W/m?-K. Assuming constant thermal conductivity and no
heat generation in the wall,
i
express the differential equation and the boundary conditions for steady one-
dimensional heat conduct ion through the wall,
obtain a relation for the variation of temperature in the wall by solving the
differential equation, and
ii
iii.
determine the net heat flux, ġo absorbed by the collector
ε, α, Τ.
Absorber plate
Water tubes
Insulation
Fig. 1
Transcribed Image Text:A flat-plate solar collector, as shown in Fig. 1, is used to heat water by having water flow through tubes attached at the back of the thin solar absorber plate. The absorber plate has an emissivity and an absorptivity of 0.8. The top surface (* = 0) temperature of the absorber is To = 35 °C, and solar radiat ion is incident on the absorber at 600 W/m? with a surrounding temperature of 0 °C. The convection heat transfer coefficient at the absorber surface as 8 W/m?-K. Assuming constant thermal conductivity and no heat generation in the wall, i express the differential equation and the boundary conditions for steady one- dimensional heat conduct ion through the wall, obtain a relation for the variation of temperature in the wall by solving the differential equation, and ii iii. determine the net heat flux, ġo absorbed by the collector ε, α, Τ. Absorber plate Water tubes Insulation Fig. 1
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