6. Economic and ecological aspects

6.1 Economical and ecological thickness

The cost of operating thermal fluid equipment is proportional to the cost of the energy expended to limit heat loss.

Heat loss decreases with insulation thickness. The investment required for this insulation increases with the thickness. The total cost passes through a minimum for a certain thickness, known as the economic insulation thickness.

If we add GHG constraints (market and carbon tax), we increase operating costs, which makes it possible to determine an ecological insulation thickness.

Given the number of parameters to be taken into account, such studies are rare, and the last ones took place in the 1970s, after the...

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Economic and ecological aspects

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Calculations

Bibliography

(1) - BALCKE (H.) - La technique moderne de la protection contre la chaleur et le froid. - Dunod (1935).
(2) - BALLOT (G.) - Guide pratique de l'isolation frigorifique. - PYC-Édition (1972).

Standards and norms

Vocabulary and definitions

Thermal performance of buildings and building materials – Physical quantities and definitions - NF EN ISO 7345 - 2018
Thermal insulation – Vocabulary - NF EN ISO 9229 - 2020

Calculations

Thermal insulation for building equipment and industrial facilities – Calculation methods - NF EN ISO 12241 - 2010
Thermal insulation of heated and refrigerated...

Regulations

Existing buildings

Decree of May 3, 2007 on the thermal characteristics and energy performance of existing buildings (article 22), amended by the decree of March 22, 2017 amending the decree of May 3, 2007 on the thermal characteristics and energy performance of existing buildings (article 4).

Energy saving certificates

Order of December 6, 2018 amending...