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Author Topic: Question about sea water energy  (Read 6530 times)

Offline Generator

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Question about sea water energy
« on: September 06, 2011, 09:42:08 AM »
Dear thinkers, searchers and inventors  !

1) Assuming there is a temperature difference between the upper sea water and the air above the sea water of about 20 degree Celsius.
Wouldn´t it be possible to grab the heat with a heat pump and drive a stirling to produce electricity ?

I tried to find out if there are such places but no success. Highest sea water temperatures seem to be about 30-32 Celsius at some places.
Question is, if the air cools down at such places to 10 Celsius, for example in the night or if there is bad weather. I guess this might happen.
Do you know if there might be such places ?

2) What is the lowest temperature difference suitable to drive a heat pump + stirling ? Could 10 Celsius be enough also ?

3) What about this: You save energy from a working fluid into big isolated water tanks all the time. But you start the stirling in the night, when air temperature cooled down.

3) Increasing pressure on the  working fluid increases its temperature. In geothermic systems, pressure f.e. is lifted up from 6 to 17bar and temperature from 0C to 35C. Are there any calculations on how the efficiency increases by increasing the fluids temperature with higher pressure ? A stirling would work more efficient on higher temp differences, of course.

4) We know there are places getting extremely cold in the winter. I assume the earth temperature increases anywhere fastly to a simlar level, if you get a little bit deeper, that means, even if the air temperature is -50 Celsius you will get 0 Clesius or even more 100 meters under ground. Is this true ? Or let me ask you, what would be the temperature in an average area 100 meters under ground in winter with -50 Celsius at least ?

What I want to ask, wouldn´t it be possible to use such extreme temperature differences to drive a stirling with immense power ? Guess you warm up a -50C working fluid to 0C by geothermic heat from 100m under ground, compress it and drive a low tempereature stirling sitting in -50C cold air with a +35C hot gas.... 85C difference .... what would be the efficency here ?

5) What about areas with extreme temperature differences in the other direction ? What about a heat pump in the desert with +50C in daytime and 0C in the night? Of course, dishers to drive strilings would be nice, also in such an environment. But what would be better ?

your Generator

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Question about sea water energy
« on: September 06, 2011, 09:42:08 AM »