I just registered on this forum that I consult "anonymously" regularly. For 7 years, as part of the renovation of our house, we have been in a global energy and food autonomy project. It would be too long and maybe boring to explain in a thread, for those who want it and have a little time to devote to it: http://www.letalave.com ; menu le talabve-> heat production for the subject that concerns us.
This house is an "isolated site" chalet at an altitude of 1200m in Haute-Savoie. Autumn being here, I want to upgrade my heating installation without too much expense (no budget because in a micro-gardening installation currently). Here is a diagram of the existing one:
Since we can organize without hot water at the tap, I would like to use my hot water tank to make a small experimental buffer. This is a Cordivari Bolly 1. Currently, the heat is produced by a stove-boiler wood (5155 godin chatelaine range) and directly stored in the dry matter (mainly heated walls). This gives us a little inertia for the night in particular but I would like to slightly increase this inertia and especially to be able to graft other sources of heat production. I thought to use the internal heat exchanger with, for the autumn, a self-built thermal solar panel.
On the remaining taps, ie Entry / Exit water + drain + recirculation, I thought to graft my stove and a small heater bath or gas boiler to empty the current propane tank (that I want to return to the gas supplier ) and later graft a unit of pico-methanisation autoconsumed. All manipulations for regulation, settings and parameters will be managed manually at first. If the experiment is conclusive, the installation will evolve hopefully to a properly sized buffer and a little automation based arduino or other. A big constraint is the management of the electric resource. I would need a system in the ideal passive or very frugal in watts. The circulator is a wilo pico stratos 1-6.
I think to replace the expansion tank with a closed one.
I do not make a diagram of what I imagined for the moment because my ideas all have disadvantages that I have trouble solving, I prefer to offer you a blank page and stay open to other perspectives. I thank you in advance for the time you have spent reading this post, and very grateful and delighted to discover your possible contributions.
Thank you