ISO 15927-1:2003
(Main)Hygrothermal performance of buildings — Calculation and presentation of climatic data — Part 1: Monthly means of single meteorological elements
Hygrothermal performance of buildings — Calculation and presentation of climatic data — Part 1: Monthly means of single meteorological elements
ISO 15927-1:2003 specifies procedures for calculating and presenting the monthly means of those parameters of climatic data needed to assess some aspects of the thermal and moisture performance of buildings. Numerical values for any locations should be obtained from the meteorological service in the relevant country. ISO 15927-1:2003 covers the following single climate variables: air temperature; atmospheric humidity; wind speed; precipitation; solar radiation; longwave radiation. Meteorological instrumentation and methods of observation are not covered; these are specified by the World Meteorological Organisation (WMO).
Performance hygrothermique des bâtiments — Calcul et présentation des données climatiques — Partie 1: Moyennes mensuelles des éléments météorologiques simples
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 15927-1
First edition
2003-11-15
Hygrothermal performance of
buildings — Calculation and presentation
of climatic data —
Part 1:
Monthly means of single meteorological
elements
Performance hygrothermique des bâtiments — Calcul et présentation
des données climatiques —
Partie 1: Moyennes mensuelles des éléments météorologiques simples
Reference number
©
ISO 2003
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ii © ISO 2003 – All rights reserved
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15927-1 was prepared by the European Committee for Standardization (CEN) in collaboration with
Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment,
Subcommittee SC 2, Calculation methods, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
Throughout the text of this document, read “.this European Standard.” to mean “.this International
Standard.”.
ISO 15927 consists of the following parts, under the general title Hygrothermal performance of buildings —
Calculation and presentation of climatic data:
— Part 1: Monthly means of single meteorological elements
— Part 4: Data for assessing the annual energy demand for cooling and heating systems
— Part 5: Winter external design air temperatures and related data
Further parts are in preparation.
Contents
Page
Foreword.v
1 Scope .1
2 Normative references .1
3 Terms, definitions, symbols and units .1
3.1 Terms and definitions.1
3.2 Symbols and units .3
4 Periods over which parameters are calculated .4
5 Air temperature .5
5.1 Sources of data .5
5.2 Calculation of the monthly mean .5
5.3 Calculation of the standard deviation of daily means about the monthly mean.6
5.4 Calculation of the annual mean and standard deviation.7
5.5 Expression of results .7
6 Atmospheric humidity.8
6.1 Sources of data .8
6.2 Relationships between temperature and humidity parameters.8
6.3 Calculation of monthly mean.10
6.4 Expression of results .11
7 Wind speed and direction .13
7.1 Methods of measurement .13
7.2 Environmental influence on mean wind speed.13
7.3 Statistical elements .17
7.4 Expression of results .18
8 Precipitation .19
8.1 Sources of data .19
8.2 Calculation of monthly total.19
8.3 Expression of results .19
9 Solar radiation.19
9.1 Sources of data .19
9.2 Calculation of monthly total solar irradiation .20
9.3 Expression of results .21
9.4 Estimating irradiances that are not measured.21
10 Longwave radiation .21
10.1 General.21
10.2 Sources of data .21
10.3 Calculation of monthly total longwave irradiation from the atmosphere (sky).21
10.4 Expression of results .22
Annex A (informative) Methods for splitting global solar irradiance into the direct and diffuse parts.23
Annex B (informative) Methods for estimating the longwave atmospheric irradiances (longwave sky
irradiances)and the sky temperature.24
Bibliography .26
iv © ISO 2003 – All rights reserved
Foreword
This document (EN ISO 15927-1:2003) has been prepared by Technical Committee CEN/TC 89, “Thermal
performance of buildings and building components”, the secretariat of which is held by SIS, in collaboration with
Technical Committee ISO/TC 163, “Thermal performance and energy use in the built environment”,
Subcommittee SC 2 "Calculation methods".
This European Standard shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by April 2004, and conflicting national standards shall be withdrawn at the latest
by April 2004.
This standard is one of a series of standards on calculation methods for the design and evaluation of the thermal
and moisture performance of buildings. EN ISO 15927, Hygrothermal performance of buildings – Calculation and
presentation of climatic data, consists of six parts:
Part 1: Monthly means of single meteorological elements;
Part 2: Data for design cooling loads and risk of overheating;
Part 3: Calculation of a driving rain index for vertical surfaces from hourly wind and rain data;
Part 4: Data for assessing the annual energy for heating and cooling;
Part 5: Winter external design air temperatures and related wind data;
Part 6: Accumulated temperature differences for assessing energy use in space heating.
Annexes A and B are informative.
This document includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies procedures for calculating and presenting the monthly means of those
parameters of climatic data needed to assess some aspects of the thermal and moisture performance of
buildings. Numerical values should be obtained from the meteorological service in the relevant country.
This European Standard covers the following single climate variables:
air temperature;
atmospheric humidity;
wind speed;
precipitation;
solar radiation;
longwave radiation.
Meteorological instrumentation and methods of observation are not covered; these are specified by the World
Meteorological Organisation (WMO).
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
World Meteorological Organisation: Guide to meteorological instruments and methods of observation. 6th Edition
WMO - No.8 1996.
3 Terms, definitions, symbols and units
3.1 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1.1
mixing ratio
ratio of the mass of water vapour to the mass of dry air with which the water vapour is associated
3.1.2
water vapour pressure
part of the total atmospheric pressure exerted by water vapour
3.1.3
saturated vapour pressure over water
vapour pressure of moist air in equilibrium with a plane liquid water surface
3.1.4
relative humidity
ratio of the vapour pressure of moist air to the vapour pressure it would have if it were saturated
3.1.5
reference wind speed
wind speed measured at a height of 10 m above ground level in open country without nearby obstacles
3.1.6
gust speed
greatest instantaneous wind speed observed during the period over which the mean is calculated
3.1.7
solar irradiance
radiation power per area generated by the reception of solar radiation on a plane of any tilt and orientation
The following special quantities can be distinguished according
...
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