Open Source Solar Water Heater: Difference between revisions
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=Industry Standards= | =Industry Standards= | ||
* | ==Plastic Tube Panel== | ||
*[https://www.amazon.com/SolarPoolSupply-Solar-Pool-Heater-Replacement/dp/B076B75D7P/ref=sr_1_1_sspa?dchild=1&keywords=SOLARPOOLSUPPLY&qid=1595969118&sr=8-1-spons&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExWkRVVk9MREk0OVowJmVuY3J5cHRlZElkPUEwOTYxNjEzM0dLWFRCV0w3ODk5VSZlbmNyeXB0ZWRBZElkPUEwMDU4MTk5RUhQMk5SV0ZZRVBEJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ&th=1 A Common Panel Design] ~350 USD minimum | |||
=Existing Open Source Designs= | =Existing Open Source Designs= | ||
==Plastic Tube Coil== | |||
*[https://www.youtube.com/watch?v=btQtPQpUf90 This Design by the Youtube Channel "Dessertsun02" ] Uses a copper coil with a metal reflector behind it, and a wood frame | *[https://www.youtube.com/watch?v=btQtPQpUf90 This Design by the Youtube Channel "Dessertsun02" ] Uses a copper coil with a metal reflector behind it, and a wood frame | ||
| Line 21: | Line 23: | ||
=Basic Design= | =Basic Design= | ||
==Box== | ===Plastic Tube Coil=== | ||
====Box==== | |||
*A wood or metal box | *A wood or metal box | ||
*Optional insulation | *Optional insulation | ||
==Backplate== | ===Backplate==== | ||
*Sheet metal | *=Sheet metal | ||
*make reflective or dark as well? | *make reflective or dark as well? | ||
=Coil= | ====Coil==== | ||
*Standard OTS refrigeration coil, or custom bent tubing | *Standard OTS refrigeration coil, or custom bent tubing | ||
*Has the standard fittings at each end | *Has the standard fittings at each end | ||
=Insulation= | ====Insulation==== | ||
*Foam and/or fiber for the main areas | *Foam and/or fiber for the main areas | ||
*Glass and air/vacuum gap above coil, or would the walls and cost make it not worth it? | *Glass and air/vacuum gap above coil, or would the walls and cost make it not worth it? | ||
=Temperature Probes= | ====Temperature Probes==== | ||
*Attach right above the hose adapters | *Attach right above the hose adapters | ||
*Wires go where? | *Wires go where? | ||
=Paint= | ====Paint==== | ||
*Most likely standard black paint, but the darker, the better | *Most likely standard black paint, but the darker, the better | ||
*Not 100% needed, but is a cheap way to increase absorbtion | *Not 100% needed, but is a cheap way to increase absorbtion | ||
=Heat Exchanger?= | ====Heat Exchanger?==== | ||
*[[Open Source Liquid-Liquid Heat Exchanger]] | *[[Open Source Liquid-Liquid Heat Exchanger]] | ||
=BOM= | =====BOM===== | ||
*~1m Sheet Metal (what metal?) | *~1m Sheet Metal (what metal?) | ||
*Fiberglass insulation | *Fiberglass insulation | ||
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*[https://en.wikipedia.org/wiki/Solar_water_heating The Wikipedia Page on Solar Water Heaters] | *[https://en.wikipedia.org/wiki/Solar_water_heating The Wikipedia Page on Solar Water Heaters] | ||
*[https://www.energy.gov/energysaver/solar-water-heaters/heat-transfer-fluids-solar-water-heating-systems An Energy.gov page on Working Fluids for Indirect Systems] | *[https://www.energy.gov/energysaver/solar-water-heaters/heat-transfer-fluids-solar-water-heating-systems An Energy.gov page on Working Fluids for Indirect Systems] | ||
*[ | |||
Revision as of 20:48, 28 July 2020
Basics
- A Device that uses Solar Thermal to heat water
- Can be used from cold to near boiling (see Open Source Solar Steam Generator ) for water to Wet Steam, and Open Source Steam Superheater for Wet Steam to Dry Steam
- There are many ways of doing this but this page will focus on pancake coil type designs, see Open Source Thermosyphon for thermosyphon designs
- Pancake works well, a tube with modular screw in ports for long plastic tube runs is better for high flow
- Need to look into if these can be grouped for boiling temperatures (this may lead to Steam Hammer and/or overpressure explosions, but perhaps with the right precautions (Steam traps, overpressure valves. etc)
- Direct systems can be used for pool/utility water, for potable water, indirect may be better
Industry Standards
Plastic Tube Panel
- A Common Panel Design ~350 USD minimum
Existing Open Source Designs
Plastic Tube Coil
- This Design by the Youtube Channel "Dessertsun02" Uses a copper coil with a metal reflector behind it, and a wood frame
Minimum Viable Product
- Should be able to reach near boiling (~80C is what most existing designs could reach in one stage)
- Should be a small flat square (less than 1m^2 wide, and less than 5 cm deep?)
- Should use standard hose fittings for both the "in" and the "out"
- Optional temperature probes
- perhaps have a thicker and slightly wider model with insulation
Basic Design
Plastic Tube Coil
Box
- A wood or metal box
- Optional insulation
Backplate=
- =Sheet metal
- make reflective or dark as well?
Coil
- Standard OTS refrigeration coil, or custom bent tubing
- Has the standard fittings at each end
Insulation
- Foam and/or fiber for the main areas
- Glass and air/vacuum gap above coil, or would the walls and cost make it not worth it?
Temperature Probes
- Attach right above the hose adapters
- Wires go where?
Paint
- Most likely standard black paint, but the darker, the better
- Not 100% needed, but is a cheap way to increase absorbtion
Heat Exchanger?
BOM
- ~1m Sheet Metal (what metal?)
- Fiberglass insulation
- Foam Insulation
- Either copper piping, or an OTS refrigeration coil
- Fittings
- Optional temperature sensors
- Perhaps Wood or Plastic Exterior