Vacuum Insulation: Calculating Amount for 1 Bar

[bionic6manuel]

I would like to know if there is a formula or a way to determine the amount of insulation a vacuum of 1 bar can produce. please note I am not talking about vacuum insulated panels.

 

[davenn]

insulation to what ?
heat ? electrical ionisation something else ??

cheers
Dave

 

[bionic6manuel]

Thermal insulaion

 

[f95toli]

1 Bar is the atmospheric pressure, i.e. it is not a vacuum at all.

But regardless of the pressure: no there is no formula. It is of course perfectly possible to calculate the heat transfer due to convection, conduction and radiation; but all of these will depend on the geometry and the materials used.

 

[pmacias]

Thank you for your question. I can provide you with some information on vacuum insulation and how to calculate its effectiveness at 1 bar.

First, it is important to understand that vacuum insulation works by creating a barrier between two environments with different temperatures. The vacuum acts as an insulator, preventing heat transfer between the two environments. The effectiveness of vacuum insulation is measured by its thermal conductivity, which is the rate at which heat can pass through the material.

To calculate the amount of insulation a vacuum of 1 bar can produce, you will need to know the thermal conductivity of the material used in the vacuum insulation. This information can usually be found from the manufacturer or through testing.

Once you have the thermal conductivity value, you can use the following formula to calculate the amount of insulation:

Insulation = (Temperature difference / Thermal conductivity) x Thickness

Where:
- Temperature difference is the difference in temperature between the two environments
- Thermal conductivity is the thermal conductivity of the material used in the vacuum insulation
- Thickness is the thickness of the vacuum insulation

It is important to note that this formula assumes a steady state, meaning that there is no change in temperature over time. In real-world applications, there may be fluctuations in temperature that can affect the effectiveness of vacuum insulation.

I hope this information helps. Please let me know if you have any further questions.