Primary energy demand and the selection of insulation materials

Hello,

I have been dealing with insulation materials for my DA for a few weeks.

When it comes to primary energy demand, something is unclear to me...

For the production of, for example, hemp as an insulation material, about 50-80kWh/m3 of primary energy is required.
In contrast, for glass wool about 250-500kWh/m3.

Then I looked into the data sheets of [Ökobau.dat]. There, a primary energy of 54MJ/kg is specified for hemp and 31.86MJ/kg for glass wool.

Can someone explain this jump to me?

I understand that hemp has a higher density. But if I convert that, I should come back to approximately the same values, right?!

Somehow I have a mental block...

I hope someone can help me.

Hello,

....I hope someone can help me.

One must distinguish between the primary energy demand of production and that of application. For most builders, the latter is decisive. Viewed exactly, for reasons of economic efficiency, even only the payable final energy!
On the other hand, relatively few are interested in the primary energy demand of production.
This should be reflected in the pricing of the respective product.

Best regards

Yes, I know.

But specifically, I am concerned about the production and the problem described above.

@Elfriede: Why is this so important to you? I don't really understand your question now.

Regards