It is desired to transport liquid metal through a pipe embedded in a wall at a point where the temperature is 650 k. a 1.2‐m‐thick wall constructed of a material having a thermal conductivity varying with temperature according to k = 0.0073 (1 + 0.0054 t), where t is in k and k is in w/m ⋅ k, has its inside surface maintained at 925 k. the outside surface is exposed to air at 300 k with a convective heat‐transfer coefficient of 23 w/m2 ⋅ k. how far from the hot surface should the pipe be located? what is the heat flux for the wall?

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

The higher the astm grain size number, the finer the gran is. a)-true b)-false