Unformatted text preview: radiation heat transfer from the body to the surrounding walls, ceiling, and the floor in both cases are: ( a ) Summer: T surr = 23+273=296 W 84.2 = ]K K) (296 273) + )[(32 m )(1.6 .K W/m 10 67 . 5 )( 95 . ( ) ( 4 4 4 2 4 2 8 4 surr 4 rad − × = − = − T T A Q s s εσ & T surr Q rad ( b ) Winter: T surr = 12+273= 285 K W 177.2 = ]K K) (285 273) + )[(32 m )(1.6 .K W/m 10 67 . 5 )( 95 . ( ) ( 4 4 4 2 4 2 8 4 surr 4 rad − × = − = − T T A Q s s & Discussion Note that the radiation heat transfer from the person more than doubles in winter. 130...
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 Fall '10
 Dr.DanielArenas
 Thermodynamics, Mass, Heat, Radiation, Heat Transfer

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