Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

solar->geo injection study

zacmobile Member Posts: 211
Here is an interesting study done by an architect in the uk who is injecting solar hot water into his geo loop. Pretty simple set-up, his own home brew panels that are basically pool heating panels that are encased in plexiglass & directly connected to his ground loop. He apparently boosted his heat pumps efficiency from a COP of 2.8 to 4.8. If you check out the drilling videos you may see why his initial COP was so low; they dumped dry bentonite powder down the bore holes instead of liquid grout for some unknown reason!! 8-O Still, I think we may see more applications of annualized solar capture in the future.

<a href="http://chargingtheearth.blogspot.ca/">http://chargingtheearth.blogspot.ca/</a>


  • Mark Eatherton
    Mark Eatherton Member Posts: 5,853
    Heat dominated loads...

    I have heard that in some areas that are primarily heat dominated, that if you are dealing with a static aquifer, that the ground can freeze, and in fact swell (i've not personally seen it) thereby significantly dropping the COP of the WSHP's.

    I have the opportunity to experiment with this on my mountain home. I drilled a 10' deep hole into the hard pan shale, and my preliminary test showed that the shale does hold heat fairly well. I'd originally installed it as a heat dump, but had thoughts in the back of my mind for radiational cooling from my ceiling, and the remote possibility of seasonal energy storage. It looks promising...

    I wrote a series of articles on alternatives to conventional snowmelt systems. The Japanese have been using conventional water wells at 40 degrees F to do this for some very large surface areas for a long time. Sure, it doesn't respond to fast moving storms like a boiler fired system would, but the only parasitic cost is that of the pump moving water from the well, through the system, and back to a return well.

    Thanks for sharing.

    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
This discussion has been closed.