I wish to build a small 20m² office in my garden. I submit my ideas, thoughts and questions to the community, do not hesitate to give me your opinion
To conclude:
> 5x4m
> first question: what is the minimum ceiling height that you think is correct to avoid any feeling of being crushed?
> a little less than 30m² of roof at 25/30 °
> insulation by exterior cladding
> honeycomb concrete walls
- I started out on wood / straw frame walls but my land is very wet and I have doubts about the durability of putrescible materials. In addition, certain distance constraints vis-à-vis the boundaries of properties and surrounding houses made me abandon the idea. "Losing" 40 / 50cm in width in the walls greatly cooled me.
I) Insulation in the cladding
I was just thinking of making a wood cladding with interior caissons filled with rock wool.
Why rock wool? Because it's not expensive, unlike cork blocks for example.
Straw? Why not, but I have critters in the area
If you have other ideas for insulators, I'm interested
II) Reversible heated floor
- My office is located in the Center region, our winters are relatively rigorous ... since I am surrounded by forests, my first idea was to install a small wood stove, but given the small size of the office, I fear that the smallest Commercially available 3kW turns my office into a furnace very quickly ... 70-80m³ approx. If you have arguments to the contrary, I'm interested!
For the record, I am a computer scientist, so there will be in my office a number of PC / servers that will turn. To avoid the constant purring of the fans, I decided to cool down the entire computer park that will be in the office ^ _ ^
I take the opportunity to return all those interested in the excellent site http://www.cooling-masters.com/ and thank the passionate people present on their forum.
The principle is simple: a PER tube goes into the slab, supplies water to all the PCs in the office, warms up a bit and then plunges into the earth to take advantage of the thermal inertia of the soil to cool it, all set in motion by a small circulator.
A) Heating
- From there, I said to myself: why not also pass another PER BAO poured in the slab to heat my office?
I have room on the roof, I'm oriented almost south (about 160 °), I saw many sites where autoconstructobrowers made pretty small solar panels, filled with brine which I think done within my reach.
Let's start the flow of questions
- 1 - solar panels, even in winter, can potentially heat up to what I could see (I found a video where steam came out of the panel facing south and full summer and filled with a bit of tap water ). But I thought, perhaps naively, to pass the water directly from the panel to PER under slab. Is my idea feasible or not?
2 - I need a pump to circulate the water panels to the slab, I can not use the principle of thermosiphon. Here again, the question of temperature arises. What is the budget for a pump capable of supporting high temperatures?
3 - is there a device, not "too" expensive, which could switch off the pump as soon as a certain temperature is reached?
4 - Am I forced to go through a tank, type water heater, which would be heated by the solar panel, then another circuit that would go into the tank to warm up before going into the slab?
5 - should not a safety valve be installed on the water circuit (say between the tank and the panels) to prevent the pressure from rising too much? I did not see it on the site of self-builders that I saw visit ...
Clearly, I'm lost!
B) Air conditioning
- As long as I am there, with a small valve system, even if it means having a circuit that goes under the slab, I might as well try to pass "fresh" water during the summer. I was just thinking, in the same way that I cool my computers from the ground, to run PER BAO in the ground (the water table is not far and anyway, the tubes will be buried at + -2m)
Second wave
- 1 - in general, as much for the heating as for the clim, for the slab that in the soil, it is imperatively necessary to use sheathed PER? I would say yes, but ...
2 - do you have any idea of the heat exchange (say in joules / cm² or w / cm²) of PER BAO
3 - what do you think of the idea?
That's it, I think there is already much food for thought with all this
Thank you in advance for your answers
