GB/T 17370-2015 English PDF (GB/T17370-2015)

GB/T 17370-2015: Determination of stead-state thermal transmissivity of a moist building material
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GB/T 17370-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.10
Q 25
GB/T 17370-2015 / ISO 10051.1996
Replacing GB/T 17370-1998
Determination of stead-state thermal
transmissivity of a moist building material
(ISO 10051.1996, Thermal insulation - Moisture effects on heat
transfer - Determination of thermal transmissivity of a moist
material, IDT)
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. AUGUST 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Symbols and units ... 6
5 General considerations ... 8
6 Test apparatus ... 12
7 Test procedure ... 12
8 Test report ... 19
Annex A ... 21
Annex B ... 27
Annex C ... 30
Annex D ... 32
Bibliography ... 33
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 17370-1998 Determination of stead-state thermal
transmissivity of a moist building material. Compared with GB/T 17370-1998, in
addition to editorial changes, the main technical changes are as follows.
- modified normative references (see Clause 2 of this Edition, Clause 2 of
1998 Edition);
- deleted the last paragraph of Clause 5; added note in 3.1 (see 3.1 NOTE
of this Edition, 5.3 of 1998 Edition);
- modified the expression of term “hygroscopic range” (see 3.2 of this
Edition, 3.2 of 1998 Edition);
- added Figure A.1 (see Annex A);
- modified Annex E as Bibliography (see Bibliography of this Edition, Annex
E of 1998 edition).
This Standard uses translation method to make it identical with ISO 10051.1996
Thermal insulation - Moisture effects on heat transfer - Determination of thermal
transmissivity of a moist material.
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Insulation Material of Standardization Administration of China (SAC/TC 191).
The drafting organization of this Standard. Henan Building Materials Research
and Design Institute Co., Ltd..
Main drafters of this Standard. Zhang Liping, Li Guowang, Xu Wenjie, Cao
Xiaorun, Jiang Rui, Wan Xindi, Fu Baozhou.
Version of standard substituted by this Standard is.
- GB/T 17370-1998.
Determination of stead-state thermal
transmissivity of a moist building material
1 Scope
This Standard specifies a method to determine the thermal transmissivity of a
moist material (λ*) under steady-state moisture conditions, i.e. not affected by
moisture movement. It is measured using standardized guarded hot plate and
heat flow meter methods, at temperatures above 0°C. This material property is
a function of the moisture content and does not represent the thermal
performance of a material under service conditions. However, it can be used,
together with knowledge of the moisture conditions in the material, to predict
the practical thermal performance.
The use of λ*, the distribution of moisture under service conditions and
consequently the prediction of thermal performance under service conditions
are outside the scope of this Standard. However, the moisture distribution under
service conditions should, where possible, be considered when 1’ is determined.
Furthermore, transient methods of measurement are not included due to the
difficulty involved in analyzing and interpreting the results of these methods.
2 Normative references
The following referenced documents are indispensable for the application 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.
GB/T 10294-2008 Thermal insulation - Determination of steady-state
thermal resistance and related properties - Guarded hot plate apparatus (ISO
8302.1991, IDT)
GB/T 10295-2008 Thermal insulation-Determination of steady-state
thermal resistance and related properties - Heat flow meter apparatus (ISO
8301.1991, IDT)
ISO 6946-1.1986 Thermal insulation - Calculation methods - Part 1. Steady
state thermal properties of building components and building elements
ISO 7345.1987 Thermal insulation - Physical quantities and definitions
GB/T 17370-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.10
Q 25
GB/T 17370-2015 / ISO 10051.1996
Replacing GB/T 17370-1998
Determination of stead-state thermal
transmissivity of a moist building material
(ISO 10051.1996, Thermal insulation - Moisture effects on heat
transfer - Determination of thermal transmissivity of a moist
material, IDT)
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. AUGUST 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Symbols and units ... 6
5 General considerations ... 8
6 Test apparatus ... 12
7 Test procedure ... 12
8 Test report ... 19
Annex A ... 21
Annex B ... 27
Annex C ... 30
Annex D ... 32
Bibliography ... 33
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 17370-1998 Determination of stead-state thermal
transmissivity of a moist building material. Compared with GB/T 17370-1998, in
addition to editorial changes, the main technical changes are as follows.
- modified normative references (see Clause 2 of this Edition, Clause 2 of
1998 Edition);
- deleted the last paragraph of Clause 5; added note in 3.1 (see 3.1 NOTE
of this Edition, 5.3 of 1998 Edition);
- modified the expression of term “hygroscopic range” (see 3.2 of this
Edition, 3.2 of 1998 Edition);
- added Figure A.1 (see Annex A);
- modified Annex E as Bibliography (see Bibliography of this Edition, Annex
E of 1998 edition).
This Standard uses translation method to make it identical with ISO 10051.1996
Thermal insulation - Moisture effects on heat transfer - Determination of thermal
transmissivity of a moist material.
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Insulation Material of Standardization Administration of China (SAC/TC 191).
The drafting organization of this Standard. Henan Building Materials Research
and Design Institute Co., Ltd..
Main drafters of this Standard. Zhang Liping, Li Guowang, Xu Wenjie, Cao
Xiaorun, Jiang Rui, Wan Xindi, Fu Baozhou.
Version of standard substituted by this Standard is.
- GB/T 17370-1998.
Determination of stead-state thermal
transmissivity of a moist building material
1 Scope
This Standard specifies a method to determine the thermal transmissivity of a
moist material (λ*) under steady-state moisture conditions, i.e. not affected by
moisture movement. It is measured using standardized guarded hot plate and
heat flow meter methods, at temperatures above 0°C. This material property is
a function of the moisture content and does not represent the thermal
performance of a material under service conditions. However, it can be used,
together with knowledge of the moisture conditions in the material, to predict
the practical thermal performance.
The use of λ*, the distribution of moisture under service conditions and
consequently the prediction of thermal performance under service conditions
are outside the scope of this Standard. However, the moisture distribution under
service conditions should, where possible, be considered when 1’ is determined.
Furthermore, transient methods of measurement are not included due to the
difficulty involved in analyzing and interpreting the results of these methods.
2 Normative references
The following referenced documents are indispensable for the application 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.
GB/T 10294-2008 Thermal insulation - Determination of steady-state
thermal resistance and related properties - Guarded hot plate apparatus (ISO
8302.1991, IDT)
GB/T 10295-2008 Thermal insulation-Determination of steady-state
thermal resistance and related properties - Heat flow meter apparatus (ISO
8301.1991, IDT)
ISO 6946-1.1986 Thermal insulation - Calculation methods - Part 1. Steady
state thermal properties of building components and building elements
ISO 7345.1987 Thermal insulation - Physical quantities and definitions