Problema 4 Transeferencia
Problema 4 Transeferencia
Problema 4 Transeferencia
Datos:
Ti= 25C
T= 200C.
h= 110 W/m2C
= 4min (1min/60s) = 240s.
= 9,5 x 1O-7 m2/s
r0= 2.5/2= 1.25cm(1m/100cm)=0.0125m.
k=1,52 W/mC
r=6.4mm(1m/1000mm)=6.4x10-3
SOLUCIN:
1 k 1.52
=
Bi = hr 0 = ( 110 ) (0.0125) 1.105
0 T x=0T
= 0.07
i T iT
r
0.89
0