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DS-2 controls the flow in the feed stream to give 75 MW

Note that I broke the recycle after the boiler. While not really necessary, it does make life easier. I used three design specs in this problem.

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DS-2 controls the flow in the feed stream to give 75 MW

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  1. Note that I broke the recycle after the boiler. While not really necessary, it does make life easier. I used three design specs in this problem. The closed feed water heater was specified to have condensate (from the extraction port --vapor fraction =0) leaving the heater. DS-1 then controls the split to give the 5 C difference between the condensate and the boiler feed water. DS-2 controls the flow in the feed stream to give 75 MW DS-3 controls the split from the second extraction port to give a zero heat duty in the flash tank which I used as the open feed water heater. By specifying 0 vapor fraction, the flash model computes the heat duty necessary to have all inputs leave as a liquid. DS-3 then controls the split to give a zero heat duty. The result of all this is an overall thermal efficiency of just over 32 %

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