Avertical cylinder 180 cm tall and 30 cm in diameter might be used to approximate a man for of the cylinder is 25°c, the surface emissivity is ? 0.9. heat transfer calculations. assume that the surface temperature convective heat transfer coefficient h 12 w/m2.°c, and the furthermore, assume that the cylinder is placed in a large room where the air temperature is 20°c and the wall temperature is 10°c. calculate the rate of heat lost from the cylinder

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