Aperson is attempting to start a 20hp diesel engine with a hand crank. the distance from the handle to the center of rotation is 12 inches. the person is able to apply 25 lbf tangent to the circular path of the handle. the crank rotates at 2 rounds per second. how much power (btu/min and hp) is the person providing?

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.