Asteam power plant operates on a simple real rankine cycle between the pressure limits of 20 mpa and 20 kpa in the boiler and condenser, respectively. due to the metallurgic limits in fabrication of the turbine blades, the maximum temperature in the cycle is not to exceed 600 °c. the isentropic efficiency is 75% for both the turbine and the pump. illustrate the cycle on a t-s diagram with respect to the saturation lines. calculate the rate of work done by the compressor on the steam flow. determine the rate of heat input and output in the boiler and condenser, respectively, when the power plant operates at its maximum capacity. what is the thermal efficiency of the cycle? determine the required mass flow rate of the steam through the cycle to generate 210 mw in the power plant.

Aheavily insulated piston-cylinder device contains 0.02 m3 of steam at 300 kpa and 200 °c. 1.2 mpa. d this process. team is now compressed in a reversible manner to a pressure of etermine the entropy change and the work done on the steam during this process

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?

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.