An iron bar used for a chimney support is exposed to hot gases at 625 k with the associated convective heat-transfer coefficient of 740 w/m2 ? k. the bar is attached to two opposing chimney walls, which are at 480 k. the bar is 1.9 cm in diameter and 45-cm long. determine the maximum temperature in the bar

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.