ISO 24144:2023

INTERNATIONAL ISO
STANDARD 24144
First edition
2023-01
Thermal insulation — Test methods
for specific heat capacity of thermal
insulation for buildings in the high
temperature range — Differential
scanning calorimetry (DSC) method
Isolation thermique — Méthodes d'essai relatives à la capacité
thermique massique de l'isolation thermique des bâtiments dans la
plage de température élevée — Méthode par calorimétrie à balayage
différentiel (DSC)
Reference number
© ISO 2023
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ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 2
4.1 General . 2
4.2 Heat-flux DSC . 2
4.3 Power-compensation DSC . 3
5 Method . 4
5.1 General . 4
5.2 Basic procedure . 5
6 Apparatus and materials .7
6.1 DSC apparatus . 7
6.2 Crucibles . 8
6.2.1 General . 8
6.2.2 Shape, material and mass . 8
6.2.3 Measurement temperature range . 8
7 Test specimen . 8
7.1 General . 8
7.2 Sampling . 9
7.3 Moulding . 9
8 Test conditions and specimen conditioning . 9
8.1 Test conditions . 9
8.2 Conditioning of specimens . 9
9 Calibration .9
9.1 General . 9
9.2 Calibration materials . 10
10 Procedure .10
10.1 Setting up the apparatus . 10
10.2 Loading the specimen into the crucible . 10
10.2.1 General . 10
10.2.2 Selection of crucibles . 10
10.2.3 Weighing the specimen crucible. 10
10.2.4 Loading the specimen . 10
10.2.5 Determination of the mass of the specimen . 11
10.3 Performing measurements . 11
10.4 Post-run checks . 11
11 Determination of specific heat capacities .11
11.1 General . 11
11.2 Calculation of specific heat capacities . 11
11.2.1 In case of near-match with isothermal baselines of DSC curves . 11
11.2.2 In case of discordance with isothermal baseline of DSC curves .12
11.3 Numerical rounding of the results .12
12 Test report .12
Annex A (normative) DSC apparatus for high temperature range .14
Annex B (normative) Moulding procedure of test specimen .15
Annex C (informative) Analysis method considering discordance of isothermal baseline .18
Annex D (informative) Materials for DSC calibrations .20
iii
Bibliography .21
iv
Foreword
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This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use
in the built environment, Subcommittee SC 1, Test and measurement methods.
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v
INTERNATIONAL STANDARD ISO 24144:2023(E)
Thermal insulation — Test methods for specific heat
capacity of thermal insulation for buildings in the high
temperature range — Differential scanning calorimetry
(DSC) method
1 Scope
This document specifies test methods for specific heat capacity under high temperature conditions from
the normal temperature range to 1 600 K for insulation materials for buildings using the differential
scanning calorimetry (DSC) method.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
1)
ISO 11357-1:20—, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles
ISO 11357-4:2021, Plastics — Differential scanning calorimetry (DSC) — Part 4: Determination of specific
heat capacity
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11357-1, ISO 11357-4 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
specific heat capacity
c
p
quantity of heat necessary to raise the temperature of a unit mass of material by 1 K at constant
pressure
Note 1 to entry: It is given by the following formula:
1dQ
 
c =× (1)
 
p
m dT 
p
where
−1 −1
...