NF EN ISO 8990
NF EN ISO 8990

NF EN ISO 8990

December 1996
Standard Current mandatory application standard
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Thermal insulation. Determination of steady-state thermal transmission properties. Calibrated and guarded hot box.

Lays down the principles for the design of the apparatus and minimum requirement that shall be met for determination of the laboratory steady-state thermal transmission properties of building components and similar components for industrial use. Does not specify a particular design. Describes also the apparatus, measurement technique and necessary data reporting. Primarily intended for laboratory measurements of large, inhomogeneous specimens. Does not provide for measurements where there is mass transfer through the specimen during the test.

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Main informations

Collections

National standards and national normative documents

Publication date

December 1996

Number of pages

30 p.

Reference

NF EN ISO 8990

ICS Codes

91.120.10   Thermal insulation of buildings

Classification index

P50-748

Print number

1 - novembre 1996

International kinship

ISO 8990:1994

European kinship

EN ISO 8990:1996
Sumary
Thermal insulation. Determination of steady-state thermal transmission properties. Calibrated and guarded hot box.

Lays down the principles for the design of the apparatus and minimum requirement that shall be met for determination of the laboratory steady-state thermal transmission properties of building components and similar components for industrial use. Does not specify a particular design. Describes also the apparatus, measurement technique and necessary data reporting. Primarily intended for laboratory measurements of large, inhomogeneous specimens. Does not provide for measurements where there is mass transfer through the specimen during the test.

Table of contents
  • Section 1 Généralités
    1
  • 1.1 Domaine d'application
    1
  • 1.2 Référence normative
    1
  • 1.3 Définitions
    2
  • 1.4 Symboles, unités et relations
    2
  • 1.5 Principe
    2
  • 1.6 Limites et sources d'erreur
    4
  • Section 2 Appareillage
    8
  • 2.1 Introduction
    8
  • 2.2 Exigences de conception
    8
  • 2.3 Caisson de mesure
    9
  • 2.4 Anneau de garde
    10
  • 2.5 Porte-éprouvette
    10
  • 2.6 Côté froid de la chambre
    10
  • 2.7 Mesurage de la température
    10
  • 2.8 Appareillage
    12
  • 2.9 Évaluation du fonctionnement et étalonnage
    12
  • Section 3 Mode opératoire d'essai
    14
  • 3.1 Introduction
    14
  • 3.2 Conditionnement de l'éprouvette
    14
  • 3.3 Sélection et mise en place de l'éprouvette
    14
  • 3.4 Conditions d'essai
    15
  • 3.5 Durées de mesurage
    15
  • 3.6 Calculs
    15
  • 3.7 Rapport d'essai
    15
  • Annexe A Transfert thermique au niveau des surfaces et températures ambiantes
    17
  • Annexe B Bibliographie
    21
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