Le Potager du Sloth: Gardening without fatigue more than Bio

[Did67]

A notice seen in my research talked about dilation of oil ...

These are not gas cylinders like those that lift the tailgate of cars, and have a very large deflection.

There, the travel is very limited, hence the triangulation to increase the opening ... And in my opinion, so that at the end of the system, we lift 7 kg after this reduction, I doubt that the increase in pressure with one gas is enough! On the other hand, a liquid which expands develops phenomenal pressures, to the point of "breaking" containers ... I therefore lean for the expansion of a liquid, in this case.

I admit that we could think that it works like a thermostatic valve, which also has a very short travel ... A priori, RT can be gas, liquid, wax ... "These are well-known devices: a valve body with a valve and a rod in translation on a stuffing box, actuated by an expansion bulb of steam or wax.". But "driving" the punch does not require the same force at all.

[Julienmos]

U And in my opinion, so that at the end of the system, we lift 7 kg after this reduction, I doubt that the increase in pressure of a gas is sufficient! On the other hand, a liquid which expands develops phenomenal pressures, to the point of "breaking" containers ... I therefore lean for the expansion of a liquid, in this case.

ahhh there finally I will be able to bring back my "science" (mouhahaha)

indeed, liquids are incompressible, unlike gases (if my memories are good)

[Lolounette]

I would even say my dear Dupond: PV = nRT!


I went out!



uh, before I left altogether: I already had a jack on my greenhouse window and indeed the day he decided to flee it was oil that was flowing. I even remember trying to order this famous oil to put it back into service, and there were different ones depending on the desired opening temperature ...

[Did67]

ahhh there finally I will be able to bring back my "science" (mouhahaha)

indeed, liquids are incompressible, unlike gases (if my memories are good)

But the liquids dilate: that's why the heating systems have expansion tanks! [very exactly, the liquid dilates more than the metal that contains it - in the case of a heating system]

[Did67]

I would even say my dear Dupond: PV = nRT!

There, we are on the gas: if the volume does not increase (if it does not expand), it is its pressure that increases. I think that for temperature differences as low as for a horticultural frame, the pressure variation would be small. Applied on a very small surface - see the cylinder diameter! - it would be like pissing in a violin!

[Did67]

uh, before I left altogether: I already had a jack on my greenhouse window and indeed the day he decided to flee it was oil that was flowing. I even remember trying to order this famous oil to put it back into service, and there were different ones depending on the desired opening temperature ...

So seems logical to me ...

[Did67]

I already had a jack on my greenhouse window and indeed the day he decided to flee it was the oil that was flowing ...

It was still not a Ryobi? [humor!]

[Ahmed]

I understood that it was paraffin or other similar bodies and that this device exploited the change of solid / liquid phase; it would be consistent with a trigger at a given temperature, while a dilation is linear ...

[Lolounette]

It was still not a Ryobi? [humor!]

now that you say I have a doubt


the PV = nRT came out on my own when I read “gases are compressible” it must be due to an underlying trauma and nevertheless latent (damn it was boring these courses yuck!)

and for the part on the compressible fluids or not nothing came out alone because I hated the fluid mechanics even more than the rest (triple yuck)

under torture I think that fluids are considered incompressible when they are static but that they are actually understandable when they are moving: I warned you that it was CHIANT these things (pouuuarkk!) and that reminds me of bad memories for me to make the effort to check

[Did67]

I understood that it was paraffin or other similar bodies and that this device exploited the change of solid / liquid phase; it would be consistent with a trigger at a given temperature, while a dilation is linear ...

I think, indeed, that you are right ... I thought about it too.