The components of an electronic system dissipate 90 W are located in a 1-m-long horizontal duct whose cross section is 16 cm ( 16 cm. The components in the duct are cooled by forced air, which enters at 32(C at a rate of 0.65 m3/min. Assuming 85 percent of the heat generated inside is transferred to air flowing through the duct and the remaining 15 percent is lost through the outer surfaces of the duct, determine.
(a) The exit temperature of air and
(b) The highest component surface temperature in the duct.