Open Source Solar Water Heater: Difference between revisions

From Open Source Ecology
Jump to navigation Jump to search
(Added some more links under the "External Links" section)
(Added some more information)
Line 3: Line 3:
*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]]
*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
*There are many ways of doing this but this page will focus on pancake coil type designs, see [[Open Source Thermosyphon]] for thermosyphon designs
*This page may use tube/trough designs, but pancake seems like the main one as of now
*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)
*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=
=Industry Standards=

Revision as of 20:42, 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

Existing Open Source Designs

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

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

Internal Links

External Links

Retrieved from "https://wiki.opensourceecology.org/index.php?title=Open_Source_Solar_Water_Heater&oldid=228808"