Q10. (a) A Carnot cycle uses saturated water and steam as the working fluid, and operates between pressures of 0.07 bar and 80 bar. At the beginning of heat supply, the state of the fluid is Saturated liquid, and at the end of heat supply it is dry saturated vapor.
(i) Sketch the cycle on p-V and T-s diagrams.
(ii) Determine the thermal efficiency of the cycle.
(iii) Determine the specific work output of the cycle.
(b) An ideal Rankine cycle using steam operates between the same pressures as the Carnot cycle in Q4(a). The steam is dry saturated at the beginning of expansion, and saturated liquid leaves the condenser.
(i) Sketch the cycle on the T-s diagram.
(ii) Determine the specific work output of the cycle, allowing for feed pump work.
(iii) Determine the thermal efficiency of the cycle.
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