The rear window of an automobile is defogged by passingwarm air at 40ºC over its inner surface, and the associatedconvection coefficient is 30 W/(m2•K). Underconditions for which the outside ambient air temperature is-10ºC and the associated convection coefficient is 65W/(m2•K), what are the inner and outer surfacetemperatures of the window? The window glass is 4 mmthick.
(Answer given Tinside =9.3°C and Toutside =4.1°C)

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.