Heat is generated uniformly at a rate of 2 × 105 w/m^3 in a wall of thermal conductivity 25 w/m · k and thickness 60 mm. the wall is exposed to convection on both sides, with a fluid temperature of 30°c and h = 50 w/m2 · k on the left side, a fluid temperature of 15°c and h = 12 w/m^2 · k on the right side. (a) determine surface temperature on each side of the wall, and (b) the maximum temperature in the wall.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater