If you're trying to generate electricity by exploiting a difference in two temperatures, it would probably be more cost effective to just drop a cable into the ocean.
What actually matters is the temperature difference between two points.
But to answer your question, sure, probably - assuming your materials can withstand the extreme heat, and assuming you can get at it, which as sp332 pointed out here (http://news.ycombinator.com/item?id=3708465), we can't.
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If you're trying to generate electricity by exploiting a difference in two temperatures, it would probably be more cost effective to just drop a cable into the ocean.
Wouldn't it be easier to generate electricity from extreme heat, rather than from cold water?
What actually matters is the temperature difference between two points.
But to answer your question, sure, probably - assuming your materials can withstand the extreme heat, and assuming you can get at it, which as sp332 pointed out here (http://news.ycombinator.com/item?id=3708465), we can't.