Please answer the sub-parts ii, iii and iv. 8. A binary-vapour eycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is suppliedto the mercury turbine, from which it exhaust at 0.04 bar. The mereury condenser generates saturatedsteam at 15 bar which is expanded in a steam turbine to 0.04 bar.(i) Find the overall efficiency of the ceycle.(ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercuryturbine ?(ii) Assuming that all processes are reversible, what is the useful work done in the binary vapour eyelefor the specified steam flow ?(iv) If the steam leaving the mereury condenser is superheated to a temperature of 300°C in a super-heater located in the mercury boiler, and if the internal efficiencies of the mercury and steam tur-bines are 0.85 and 0.87 respectively, caleulate the overall efficiency of the eycle. The properties ofsaturated mercury are given below :p (bar) tCC)(kJ/ kg)(kJ / kg K)(m'/kg)4.545063.93355.980.13520.539779.9 x1040.0680.04216.929.98329.850.08080.692576.5 x 10-5.178|Ans. (i) 52.94%, (i) 59.35 × 10' kg/h, (iii) 28.49 MW, (iv) 46.2%)

Answered: A binary-vapour eycle operates on…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Please answer the sub-parts ii, iii and iv.

8. A binary-vapour eycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is supplied
to the mercury turbine, from which it exhaust at 0.04 bar. The mereury condenser generates saturated
steam at 15 bar which is expanded in a steam turbine to 0.04 bar.
(i) Find the overall efficiency of the ceycle.
(ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury
turbine ?
(ii) Assuming that all processes are reversible, what is the useful work done in the binary vapour eyele
for the specified steam flow ?
(iv) If the steam leaving the mereury condenser is superheated to a temperature of 300°C in a super-
heater located in the mercury boiler, and if the internal efficiencies of the mercury and steam tur-
bines are 0.85 and 0.87 respectively, caleulate the overall efficiency of the eycle. The properties of
saturated mercury are given below :
p (bar) tCC)
(kJ/ kg)
(kJ / kg K)
(m'/kg)
4.5
450
63.93
355.98
0.1352
0.5397
79.9 x104
0.068
0.04
216.9
29.98
329.85
0.0808
0.6925
76.5 x 10-
5.178
|Ans. (i) 52.94%, (i) 59.35 × 10' kg/h, (iii) 28.49 MW, (iv) 46.2%)

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A binary-vapour cycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is suppliedto the mercury turbine, from which it exhaust at 0.04 bar. The mercury condenser generates saturatedsteam at 15 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 mercuryturbine ?(iii) Assuming that all processes are reversible, what is the useful work done in the binary vapour cyclefor the specified steam flow ?(iv) If the steam leaving the mercury condenser is superheated to a temperature of 300°C in a superheaterlocated in the mercury boiler, and if the internal efficiencies of the mercury and steam turbinesare 0.85 and 0.87 respectively, calculate the overall efficiency of the cycle. The properties ofsaturatedmercury are given below :

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