You have removed a very large, thick plate of steel (aisi 1010) from your heat treat oven and have placed it on a large insulated surface; the steel is now at a uniform initial temperature of 600.0°c. you now cool the exposed top surface of the steel using high-velocity cooling fluid; which keeps the cooled surface at a constant 30.0°c (assume the other surface is not losing any heat). how long will you need to run the coolant to cool the steel at a depth of 4.20cm to a temperature of 60.0°c?

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.