onsider a plane composite wall that is composed oftwo materials of thermal conductivitieskA0.1 W/mKandkB0.04 W/mK and thicknessesLA10 mm andLB20 mm. The contact resistance at the interfacebetween the two materials is known to be 0.30 m2K/W. Material A adjoins a fluid at 200C for whichh10W/m2K, and material B adjoins a fluid at 40C forwhichh20 W/m2K.(a) What is the rate of heat transfer through a wall thatis 2 m high by 2.5 m wide?(b) Sketch the temperature distribution

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

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0