Conversation
monsieuricon

K. Ryabitsev

My other idea is using insulated tanks of distilled water buried in the ground for residential peak shaving. Overnight, the water is heated to 90°C using cheap excess capacity. During the morning peak, the heat pump uses it as a source of readily available heat for central heating. You can even have a fully mechanical heat pump "trickle-heating" the water during the night from a small wind turbine, since you just need to run the compressor and move the liquids around. There should be enough wind to heat up a tank of water even with a small backyard turbine.

I'm a complete dilettante in this, so I'm probably missing 99 reasons why this would be a lot more difficult.
3
0
1
mcdanlj@social.makerforums.info

Michael K Johnson

Reply to @monsieuricon

@monsieuricon This is a thing, except not usually buried. Search for "non-pressurized hot water storage tank". I have a friend who has one in conjunction with his geothermal system. It has something like 4" thick styrofoam walls.

Sometimes there's a heat exchanger in the tank, and sometimes the heat exchanger is outside the tank. My friend's geothermal system uses the external geothermal heat exchanger for this purpose, so the tank is really just a styrofoam box. His is a rectangular prism; some are cylindrical.

Just keep it completely separate from your plumbing system; these energy storage system hot water tanks can get some fairly nasty bacteria growing in them that stay alive at unreasonable temperatures.

0
0
1
jani@fosstodon.org

Jani Nikula

Reply to @monsieuricon

@monsieuricon

Something a bit like this has been in operation in Helsinki since 2018.

https://www.helen.fi/en/news/2018/underground-heating-and-cooling-plant-utilises-waste-heat

0
0
1
nemobis@mamot.fr

Nemo_bis 🌈

Reply to @monsieuricon

@monsieuricon The district heating in has a 320 million liters heat battery in a cavern. https://www.helen.fi/en/news/2021/gigantic-heat-caverns-in-mustikkamaa-filled

0
0
0
About social.kernel.org

Terms of service

  1. Please do not use this service in violation of the Linux Kernel Code of Conduct. Doing so will result in your account suspension with the referral of the matter to the CoC committee.

  2. "Repeating"/"boosting" someone else's status on this platform will be treated as endorsement and will fall under rule #1.

  3. You are encouraged to use this platform to promote your work on the Linux Kernel, but there is no restriction on permitted topics (with the exception of anything covered by #1 above).

  4. There is no requirement to post in English, but it should be considered the primary language of communication on this platform.

Privacy notice

The admins of this service have access to all posted statuses. They aren't looking, but if it's something they shouldn't know about, then you should not post it on this platform.

Please see the Linux Foundation Privacy Policy, which applies to this platform as well.

Getting your own account

If you would like an account on this instance, please check that the following applies to you:

  • You are listed in MAINTAINERS or CREDITS

  • OR: You have a kernel.org account or email address

  • OR: You have a long and established history of involvement with the Linux Kernel

If the above is true and you agree with the Terms of Service and Privacy Notice listed above, please use these instructions to request an account: