A binary-vapor cycle operates on mercury and steam. Saturated mercury vapor at 6 bar is supplied to the mercury turbine, from which it exhaust at 0.08 bar. The mercury condenser generates saturated steam at 20 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the cycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine? (iii) Assuming that all processes are reversible, what is the useful work done in the binary vapor cycle for the specified steam flow? (iv) If the steam leaving the mercury condenser is superheated to a temperature of 300C in a superheater located in the mercury boiler, and if the internal efficiencies of the mercury and steam turbines are 0.85 and 0.87 respectively, calculate the overall efficiency of the cycle. The properties of mercury are given below. bar to C 16 0.08 480 226.9 hf (kJ/kg) hg (kJ/kg) Sf (kJ/kg K) Sg (kJ/kg vf (m3/kg) K) 68.75 32.98 359.65 331.85 0.1384 0.0908 0.5327 79.9x10-6 0.6525 76.5x10-6 vg (m3/kg) 0.048 3.178