Consider the central receiver of .117 to be acylindrical
Chapter 12, Problem 12.118(choose chapter or problem)
Consider the central receiver of 12.117 to be acylindrical shell of outer diameter D?7 m and lengthL?12 m. The outer surface is opaque and diffuse,with a spectral absorptivity of ???0.9 for ??3?mand ???0.2 for ??3?m. The surface is exposed toquiescentambient air for which T??300 K. a) Consider representative operating conditions forwhich solar irradiation at GS?80,000 W/m2isuniformly distributed over the receiver surfaceand the surface temperature is Ts?800 K.Determine the rate at which energy is collectedby the receiver and the corresponding collectorefficiency.(b) The surface temperature is affected by conditionsinternal to the receiver. For GS?80,000 W/m2,compute and plot the rate of energy collection andthe collector efficiency for 600Ts1000 K
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