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Obamot
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by Obamot » 19/09/14, 01:15

Here too, we see a yield of 1 / 10ème for exchangers:

https://www.econologie.info/share/partag ... d5GyqC.PDF

But I could be wrong.
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by Gaston » 19/09/14, 11:44

gastonn wrote:if it is (I have experienced) but a fairly low yield (approx 1 or 2%)
With what kind of equipment :?:
Taking into account own consumption (pumps, ...) :?:

gastonn wrote:dcsn even plans to do it on identical delta for power plants and
I spoke at the beginning of this thread, they still have at least 20 ° gap, and a volume of water almost unlimited.


gastonn wrote:can anyone tell me how to calculate the thermal power of a borehole?
In my opinion, nobody: it depends too much on the type of basement.
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Gastonn
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by Gastonn » 19/09/14, 13:19

with peltier, simply:
on more than 15 different modules on + 130 test hours with temperature variations from 1 to 90 degrees
the average yields on a delta t of 20 degrees are +/- 1% (they go up very quickly to 3% @ 80 degrees and 4% + @110
these returns are a priori confirmed by all other comparable tests done.

for pumps, a closed circuit should not consume too much.

For the thermal power of a basement, just an example would suffice me with a typical soil.

for those who are interested, I start to have numbers:
(feedback), but I do not know the calculation methods
at a depth of 300 m on 20 cm of diam and 18 degrees, the thermal power of the borehole should be in the range of 7.5 to 15 kw
to confirm ...
thank you to all
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Gaston
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by Gaston » 19/09/14, 14:24

gastonn wrote:with peltier, simply:
on more than 15 different modules on + 130 test hours with temperature variations from 1 to 90 degrees
the average yields on a delta t of 20 degrees are +/- 1% (they go up very quickly to 3% @ 80 degrees and 4% + @110
these returns are a priori confirmed by all other comparable tests done.
I can not encourage you to make a prototype of low power beforehand and carefully measure the energy produced.

The thermoelectric generators with effect Seebeck are very disappointing when the temperature difference is insufficient (You want to use the outside air like cold source?)
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achernar
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by achernar » 19/09/14, 14:55

The dimensioning of an exchanger is a field in itself, I can only advise you to contact specialists in the field.
As for example Julien Ramousse of the University of Savoy or the Liten in Grenoble.
This type of group is continually looking for partnerships and I think they could not only assess the viability of the system, but participate in the project.
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by Obamot » 19/09/14, 15:45

+1

gastonn wrote:the average yields on a delta t of 20 degrees are +/- 1% (they go up very quickly to 3% @ 80 degrees and 4% + @110


tsssss, mirifique !!!

Otherwise to get 100 ° C you have to drill at -2400m or fall on a hot spring!

Good luck anyway.
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Gastonn
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by Gastonn » 19/09/14, 16:57

gaston: done ..
the numbers I give are mine with my prototypes

Obamot: mirific, what are my numbers ?? are you serious ?
what are yours, what are your essays, and with what material?

achernar: thank you very much for the contact, I keep it preciously and will not delay to contact these people
if you can possibly link them this tread to see what they think
I am not in a just theoretical approach and will soon enter the "hard" of the subject, after having carried out the tests.
I am also in contact with the brgm for the administrative and the thermal statistics on boreholes.
please
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by Gaston » 23/09/14, 11:11

gastonn wrote:gaston: done ..
the numbers I give are mine with my prototypes
Well, so 1% yield with 20 ° gap 8)

Note that the "cold" side of the Peltier will therefore have to evacuate without warming up 99% of the thermal power of the borehole (since 1% is converted into electricity), ie 9,9 kW for 100W electric.

This will require energy consumption (pump, fan,?) Of how much W?
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by Gastonn » 23/09/14, 11:17

exact
but I am on a region about 5 degrees average,
so I would already have a natural cooling by air
and I also have the opportunity to enjoy a cold river by gravitation
I chose the site for that too
please
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by Gaston » 23/09/14, 11:28

gastonn wrote:exact
but I am on a region about 5 degrees average,
so I would already have a natural cooling by air
A radiator capable of evacuating 9,9 kW in natural convection is very cumbersome.

gastonn wrote:and I also have the opportunity to enjoy a cold river by gravitation
Did you measure the temperature of the water (in summer for example)?
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