Solar Thermal

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Bricolo07
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Solar Thermal




by Bricolo07 » 13/04/15, 11:52

I made a solar thermal air collector to heat a room at home, in test it works nikel, more than 90 ° C from 11h to 17h out of the mouth. The concern is that I live in a village where the houses are all glued together so the only exposure is on you and the room I want to heat is 3 floors below, you will have understood after 4m of ducts (more down) heat does not come.
I would need advice to reach my goal, should I switch to a water system? What duct or pipe used to transport the hot air?

Additional question:
- what is the impact on the depth of the sensor casing? width, length increase the surface so it makes sense but should I put the radiator or aluminum tube for my case closest to the glass or at the bottom?
-Which stones or materials store the most heat? instead of moving air or water, may be able to heat a plate of ?? and put it in the room.

Thank you in advance for your feedback
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Flytox
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Re: Solar thermal




by Flytox » 13/04/15, 21:29

Hello Bricolo 07
Bricolo07 wrote:I made a solar thermal air collector to heat a room at home, in test it works nikel, more than 90 ° C from 11h to 17h out of the mouth. The concern is that I live in a village where the houses are all glued together so the only exposure is on you and the room I want to heat is 3 floors below, you will have understood after 4m of ducts (more down) heat does not come.

They are not very high your 3 floors for only 4 m ... : Shock:
Chui not specialist of the thing, but it seems to me that without a small ventilo to animate the circulation that will not work. (powered by a Photovoltaic cell?)

I would need advice to reach my goal, should I switch to a water system? What duct or pipe used to transport the hot air?

There are flexible (glass wool) insulated pipes, in diameters 100 to 150 mm which could do the trick. Use to connect the insert hoods to living rooms through the attic for example.

-Which stones or materials store the most heat? instead of moving air or water, may be able to heat a plate of ?? and put it in the room.

Not sure it's very convenient ...: Mrgreen: Finally you may have an idea. :P
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Reason is the madness of the strongest. The reason for the less strong it is madness.
[Eugène Ionesco]
http://www.editions-harmattan.fr/index. ... te&no=4132
Bricolo07
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by Bricolo07 » 13/04/15, 22:56

Hello, thank you for your answers and questions, then in order.
Yes 4-5 meters high for the house with ground floor, 1st floor, attic, roof.
Sisi, I have a fan that blows but may not be strong enough, because already flat I barely feel the air after 4m, so from top to bottom it's worse.
For the pipe do you have a more precise example? the best would be in recovery material.
For the stone, I thought of a brick or a flat stone (pierrade style) which absorbed the heat accessible by a drawer
Other proposals?
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Gaston
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by Gaston » 14/04/15, 10:50

Bricolo07 wrote:For the stone, I thought of a brick or a flat stone (pierrade style) which absorbed the heat accessible by a drawer
The amount of energy that can be stored in a reasonably sized solid (that can be handled without a crane) is hopelessly small.

For example: for a brick, it's around 840 J / kg.K
This means that a 10 kg brick heated to 80 ° can provide by cooling to 20 °: 840 * 10 * (80-20) = 504000 J or 140 Wh :|

To store 1kWh, you need a brick of 71 kg :!:
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by Bricolo07 » 14/04/15, 13:03

Ah yes it is not really the right method. And metal side is the same?
Why are the radiators made of cast iron?
Liquid then?
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by Gaston » 14/04/15, 14:31

Bricolo07 wrote:Ah yes it is not really the right method. And metal side is the same?
For common metals (steel, copper, ...) it is even worse.

Lithium has a capacity 4 times greater than brick, but it is not practical to handle : Mrgreen:

Bricolo07 wrote:Why are the radiators made of cast iron?
Because they conduct heat well.

Bricolo07 wrote:Liquid then?
The liquid with the highest calorific capacity is ... water: 4185 J / kg.K, i.e. 69,7 Wh for 1 kg and 60 ° difference.

If it is to carry buckets of water, no need to think about it (although on the stairs, it quickly gets hot).
With hoses and a pump, yes : Cheesy:
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by Bricolo07 » 14/04/15, 19:31

and car coolant is no better than water?
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by Flytox » 14/04/15, 21:49

Bricolo07 wrote:and car coolant is no better than water?


For heat capacity, water is the best. On the other hand, coolant can be a good compromise, additions of glycol and the like to the water prevent freezing, limit corrosion, allow boiling at a slightly higher temperature, and "lubricate" the pump seals. . Which is quite suitable for this kind of use. :P
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 14/04/15, 21:55

By typing: "insulated pipe for hot air"

Image

You have it everywhere, especially at Brileroyrama : Mrgreen:
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
Bricolo07
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Registration: 22/07/14, 10:52




by Bricolo07 » 14/04/15, 22:53

ok i'm going to go and check out the mags to my place.
On the off chance, nobody knows about wind power there?
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