A River With A Water Temperature Tl 20oc Is

A river with a water temperature Tl = 20oC is to be used as the low temperature reservoir of a large power plant, with a steam temperature of Th = 500oC. If ecological considerations limit the amount of heat that can be dumped into the river to 1500 MW, what is the largest electrical output that the plant can deliver? If improvements in hot-steam technology would permit raising Th by 100oC, what effect would this have on the plant capacity?

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