Aproposal is to build a 1000-mw electric power plant with steam as the working fluid. the condensers are to be cooled with river water. the maximum steam temperature is 550 celsius, and the pressure in the condensers will be 10 kpa. the river is 60 m wide and 8 m deep, and flows at a velocity of 10 m/min. estimate the temperature rise of the river downstream from the power plant.

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.