The compression ratio of an air-standard otto cycle is 9.5. prior to the isentropic compression process, the air is at 100 kpa, 35°c, and 600 cm^3. the temperature at the end of the isentropic expansion process is 800 k. using specific heat values at room temperature, determine (a) the highest temperature and pressure in the cycle, (b) the amount of heat transferred in, in ki, (c) the thermal efficiency, and (d) the mean effective pressure.

Acommercial grade cubical freezer, 4 m on a side, has a composite wall consisting of an exterior sheet of 5.0-mm thick plain carbon steel (kst= 60.5 w/m k), an intermediate layer of 100-mm thick polyurethane insulation (kins 0.02 w/m k), and an inner sheet of 5.0- mm thick aluminium alloy (kal polyurethane insulation and both metallic sheets are each characterized by a thermal contact resistance of r 2.5 x 104 m2 k/w. (a) what is the steady-state cooling load that must be maintained by the refrigerator under conditions for which the outer and inner surface temperatures are 25°c and -5°c, respectively? (b) for power saving purpose, which wall material should be increased/reduced in. thickness in order to reduce 50% of the cooling load found in part (a)? redesign the thickness of the proposed material. 177 w/m-k). adhesive interfaces between the q=575.93 w