Arefrigerator operating on the vapor-compression refrigeration cycle using refrige the refrigerant is considered. the temperature of the cooled space and the ambient a 13°c and 27°c, and leaves at 1 mpa and 70°c. the refrigerant leaves the condenser as saturated liquid. the rate of cooling provided by the system is 13 kw determine ir are at respectively. r-134a enters the compressor at 140 kpa as a saturated vapour a) the mass flow rate of r-134a and the cop b) the exergy destruction in each component of the cycle and the second law eficingy of the compressor, and c) the second law efficiency of the cycle and the total exergy destruction in the cycle

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?