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Problem 8-2 - less efficient than the old cycle Solution In...

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Example 8-2 For the cycle in example 8-1, keep the inlet temperature to the turbine constant and lower the turbine inlet pressure until saturated steam exits the turbine. Sketch both the new and the old cycles on T-s diagrams. Without calculation, explain why the new cycle is either more or
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Unformatted text preview: less efficient than the old cycle. Solution: In a Carnot cycle, efficiency is 1 L H T T η = − If T H decreases, efficiency goes down. The average value of T H decreases in the Rankine cycle when the pressure is lowered, so the efficiency decreases ....
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