Water is the working fluid in an ideal (so compression and expansion processes are isentropic) regenerative rankine cycle with one closed feedwater heater. superheated vapor enters the turbine at 12mpa, 480°c, and the condenser pressure is 6 kpa. steam expands through the first-stage turbine where some is extracted and diverted to a closed feedwater heater at 0.7 mpa. condensate drains from the feedwater heater as saturated liquid at 0.7 mpa and is trapped into the condenser. the feedwater leaves the heater at 10 mpa and a temperature equal to the saturation temperature at 0.7 mpa. the flow rate of steam entering the first-stage turbine is 45 kg/s. determine the magnitude of the rate of heat transfer from the working fluid passing through the condenser to the cooling water, in mw.

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?