Hybrid Car – More Fun with Less Gas

solar water without storage tank?

register ::  Login Password  :: Lost Password?
Posted by kd on May 4, 2007, 2:11 pm
 
I was wondering if it is possible to have an evacuated tube collector which
provided water direct into the water heater rather than into a storage tank
to provide a year round pre-heat as opposed to a summer only supply?



Posted by gary on May 5, 2007, 1:31 pm
 

If you have tank type water heater, there are arrangements that allow
the same tank to be used for both solar storage and hot water
heating.  This is not as efficient as having a separate tank, but it
works.
There are some listed here:
http://www.builditsolar.com/Projects/WaterHeating/water_heating.htm#DB%20and%20Closed%20Loop

On this page, the ones that work with the single tank arrangement are:
- Solar Wand -- that uses the Butler wand heat exchanger that fits a
stand hot water tank.
- SolarH20t -- works with or without separate tank
- The "Guy Marsedn" article describes installing a system with the
Butler exchanger in detail.

I'm sure there are lots of others out there.
I think that some of the "Basics" articles from Home Power at the top
of the same page discuss the pros and cons of using a single tank.

Gary


Gary


Posted by Sundug on May 5, 2007, 2:17 pm
 
You could set up your present water heater to be the solar storage
tank, but it wouldn`t be as efficient as having a seoperate solar
storage tank, and could present problems in plumbing, depending upon
the situation. Doug

TOPIC: solar water without storage tank?
http://groups.google.com/group/alt.solar.thermal/browse_thread/thread/b26ede24cb753fe0?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, May 4 2007 3:11 pm
From: "kd"


I was wondering if it is possible to have an evacuated tube collector
which
provided water direct into the water heater rather than into a storage
tank
to provide a year round pre-heat as opposed to a summer only supply?



Posted by Brian Graham on May 8, 2007, 1:22 pm
 To use your existing tank you'd essentially have to do one of two things. 1)
Pull out your electric elements and replace them with a port for water to flow
or 2) have someone cut open your tank, insert a coil and seal it back up again -
again replacing your elements or cutting new ports.

If you have new ports added to the tank, you have the benefit of having an
electric element backing up the solar on cloudy days. On the other hand, they'll
also come on after using hot water, trending towards a solar assist.

Personally, I'd suggest getting a second tank and keep your current one as-is.
Do any mods to the old tank. That way, the only time the electric elements will
kick in is if the water coming from the solar pre-heat tank is below the set
point.

And by the way, without the coil being added, you're circulating straight water
and need to drain the collector in the winter. For winter operation, insert coil.
--
Brian


I was wondering if it is possible to have an evacuated tube collector which
provided water direct into the water heater rather than into a storage tank
to provide a year round pre-heat as opposed to a summer only supply?





Posted by sylvan butler on May 8, 2007, 5:33 pm
 
Or use one of these gadgets:
http://www.butlersunsolutions.com/

No relation (believe it or not).

sdb

--
What's seen on your screen?  http://pcscreenwatch.com
sdbuse1   on mailhost  bigfoot.com

This Thread
Bookmark this thread:
 
 
 
 
 
 
  •  
  • Subject
  • Author
  • Date
please rate this thread