Recent content by ATT55

Roundness is 50micron. If the parts are assembled with no force required, and have similar thermal expansion coefficient, then the question, I think, what is the effect of adding glue between them, with high thermal expansion coefficient. The parts are rigid, and the glue is polymer. Can it...

No axial constraints. OD 130mm (unstressed diameter) ID 100mm

Yes, you can merge them.

Yes, it meant to bond them. Since the ceramic and steel have a similar thermal expansion coefficient the gap between them is never closing (at steady state). but the gap is filled with this glue, which expands. A 100 micron thin flat layer of glue barley expands in absolute values. But in my...

I’m trying to understand if in principle a very thin layer, with high thermal expansion coefficient, but low modulus is placed between rigid cylinders - can it extract significant forces? I imagine it more as a soft spring.

[Mentor Note -- Two threads on the same question have been merged.] I have two concentric cylinders, the inner cylinder is made from stainless steel on the outer cylinder is made from ceramic. The inner cylinder is heated. The cylinders are glued using epoxy glue. The gap between the cylinders...

I have two concentric thick cylinders in close tolerance (currently 50 micron gap), with a thin layer of glue between them. Internal cylinder is made from steel and external cylinder is made from ceramic (so the thermal expansion coefficient is not the same) The assembly is headed form inside...

i saw this article: High temperature heat pumps and it seems that are few models who can do it, all with COP of ~3-4. Is it an exotic equipment? For example: Friotherm Unitop 22/22 Dürr Thermeco2 HHR1000 Kobelco SGH 120/165

I do it constantly, I think solar preheating/PV will be too complicated for my application.

I want to heat 10kg of water from 20C to 80C-90C with the lowest power consumption. One option I consider is to use an electric heater and the other option is to use a heat pump. Are heat pumps common for such an application? The calculated power consumption of the electric heater is 0.7...