Which of the following situations can be approximated to a steady state heat transfer system ?

A. ntained constant at 180C

B. osed to atmospheric air at 35C</strong>

C. ospheric air at 35C

D. A sub-cooled refrigerant liquid at 8C flowing at the rate of 6 Kg/minute through a copper

E. A red hot steel slab (having outside surface temperature as 1300C) exposed to the

F. Boiling brine kept in open vessel when the bottom surface temperature of the vessel is