Solar Thermal: Difference between revisions
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Could this be done without a pump? If the lines were connected near the bottom and the top of the water tank, convection might be enough to get the water to flow. Yes this is call a Thermosyphon. My concern here is energy loss and freezing. I think the thermosyphon will run backwards at night. This could be good because it will keep the pipes from freezing, but it could lose a lot of energy. | Could this be done without a pump? If the lines were connected near the bottom and the top of the water tank, convection might be enough to get the water to flow. Yes this is call a Thermosyphon. My concern here is energy loss and freezing. I think the thermosyphon will run backwards at night. This could be good because it will keep the pipes from freezing, but it could lose a lot of energy. | ||
Could use greenhouse twinwall polycarbonate for this. Make a very large collector and it will be well insulated. | |||
A separate pump (run off wall power) will pump water through another pex pipe in front of a box fan as the radiator. | A separate pump (run off wall power) will pump water through another pex pipe in front of a box fan as the radiator. | ||
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* how quickly does it cool down when using radiator | * how quickly does it cool down when using radiator | ||
* how quickly does it heat up | * how quickly does it heat up | ||
== Go Big == | |||
I'm already looking at moving this up to an 8x12. I could just do the whole thing optimally. Extend the loft area over the garage door. Mount the solar collector on the garage (removable so I can take it down in summer. | |||
[[Category:Workshop]] | [[Category:Workshop]] | ||
Latest revision as of 16:09, 20 January 2020
For shop.
V1
Use glass sheet from coffee table. Water tank will be an insulated garbage can ~50gal. Use a solar panel and a 12v pump to circulate water.
Could this be done without a pump? If the lines were connected near the bottom and the top of the water tank, convection might be enough to get the water to flow. Yes this is call a Thermosyphon. My concern here is energy loss and freezing. I think the thermosyphon will run backwards at night. This could be good because it will keep the pipes from freezing, but it could lose a lot of energy.
Could use greenhouse twinwall polycarbonate for this. Make a very large collector and it will be well insulated.
A separate pump (run off wall power) will pump water through another pex pipe in front of a box fan as the radiator.
V1.5
Add micro controller to log
- tank temperature
- solar power output
- outside temp
- shop temp
- radiator operation
to answer
- is insulation sufficient that water stays hot over night
- when is water hottest
- what temperature
- how quickly does it cool down when using radiator
- how quickly does it heat up
Go Big
I'm already looking at moving this up to an 8x12. I could just do the whole thing optimally. Extend the loft area over the garage door. Mount the solar collector on the garage (removable so I can take it down in summer.