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Post by mannytheseacow on Oct 25, 2019 22:07:04 GMT -8
Dang, gadget, I really can’t answer that. There are so many variables. My goal with that house was diversified options. I can say that I always had heat when I wanted it, but where that heat came from depended on so many things. The climate there during heating season ranged from -30 - +55* F. My water storage tank was primarily used for domestic hot water, so how many showers, how much from the tap, etc., outside temp., did the outside temp just drop?, have we been in a cold snap for a month?, sunny?, cloudy?... did I just boil a big pot of beans all day? too many variables.
At this point, if I had to try that hard to move heat around I would just start over with a new dwelling that made sense. But I really dig the experimental things you’re doing so don’t take that as a dis.
The builditsolar site has a ton of good info about moving water around for hydronic heating, even if you want to use wood to do it and the solar aspect isn’t your jam.
It seems like you’re pretty technically competent so the equations to calculate btu / cu ft / heat run losses / temp diff. / thermal storage should get you pretty close.
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Post by gadget on Oct 26, 2019 21:08:35 GMT -8
Dang, gadget, I really can’t answer that. There are so many variables. My goal with that house was diversified options. I can say that I always had heat when I wanted it, but where that heat came from depended on so many things. The climate there during heating season ranged from -30 - +55* F. My water storage tank was primarily used for domestic hot water, so how many showers, how much from the tap, etc., outside temp., did the outside temp just drop?, have we been in a cold snap for a month?, sunny?, cloudy?... did I just boil a big pot of beans all day? too many variables. At this point, if I had to try that hard to move heat around I would just start over with a new dwelling that made sense. But I really dig the experimental things you’re doing so don’t take that as a dis. The builditsolar site has a ton of good info about moving water around for hydronic heating, even if you want to use wood to do it and the solar aspect isn’t your jam. It seems like you’re pretty technically competent so the equations to calculate btu / cu ft / heat run losses / temp diff. / thermal storage should get you pretty close. I actually really like direct solar heating. I have a stash of about a dozen sliding doors I'm planning on converting to solar heaters. I have been trying to work on a cheap reliable method to heat water with the panels and had a couple of new ideas. Challenge of course is the high temps and freeze protection. Copper is the best solution but so expensive. I worked on many designs and never really found one that was cheap and good. Then one day I thought, why bother heating the water in the panel? Why not heat air then run the air through a heat exchanger. It eliminates all the problems with water in the panel, its cheap to build and give the option of being able to choose between air heating or water heating. The metal window screen heating boxes are one of the most efficient, simplest and cheapest to build. So I'm going to put up some solar heating next spring maybe. The wood heater would act as a backup when solar is low. Heating with solar is like eliminating the middle man for your heat, that is, the middle man being the tree.
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Post by Orange on Feb 19, 2023 8:35:02 GMT -8
everyone is now installing underfloor water heating, I'm wondering why people are not hooking it up with rocket stoves like they do with with gas boilers, heat pumps etc. It's great because of perfect heat distribution and most importantly floors are large mass that don't require any space! Probably because wood heaters require maintenance.
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Post by gadget on Mar 24, 2023 13:49:06 GMT -8
everyone is now installing underfloor water heating, I'm wondering why people are not hooking it up with rocket stoves like they do with with gas boilers, heat pumps etc. It's great because of perfect heat distribution and most importantly floors are large mass that don't require any space! Probably because wood heaters require maintenance. I have learned allot since I first made this post. The BTU's you can get into water with a rocketmass heater are pretty low, though there is some usable. Just not the scale for full scale hydronic heating. I have done lots of testing heating water and researching. If someone wanted to just heat water, best design is to put your entire heater INSIDE the water tank. Hence, the modern inducer driven wood boilers. No one makes a good clean burning wood boiler that does not have a blower to pull the flue gases through.
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