Question

on of a horizontal water pipe shown in the figure is passing through a large room. The walls of interpolate properties. 1 in the room are at the same temperature as the air. You do not need to 0.0254 m, σ-5.67x 108 W/(m2 K4) Pipe т,-65°C Air T-22 C D= 6cm L 393.6 inches (4 pts) Calculate the Rayleigh Number (Ra) for this configuration. Check your answers, no partial credit on this problem. a. (4 pts) If the free convection Nusselt Number (Nu) is 13.15 calculate the convection heat transfer from the section of pipe in W. Check your answers, no partial credit on thi problem. b.

Answer 1

T.o= 22'С.4ir に3936 incwJ d6cm - 9. 99744y 393.6 in che The film Temperatu. 드 42.5 2 Preperttes of air Approxinately audle NMo

Tf 273 4351273 3-16x10ち Kayleigh No. - - 972112.563&X0 712

ぅ/Curved surface ruu x (6S- 22)