DIN EN ISO 15927-2-2009 Hygrothermal performance of buildings - Calculation and presentation of climatic data - Part 2 Hourly data for design cooling load (ISO 15927-2 2009) Englis.pdf

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1、July 2009DEUTSCHE NORM English price group 9No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.120.01!$XEf“1533467www.

2、din.deDDIN EN ISO 15927-2Hygrothermal performance of buildings Calculation and presentation of climatic data Part 2: Hourly data for design cooling load (ISO 15927-2:2009)English version of DIN EN ISO 15927-2:2009-07Wrme- und feuchteschutztechnisches Verhalten von Gebuden Berechnung und Darstellung

3、von Klimadaten Teil 2: Stundendaten zur Bestimmung der Khllast (ISO 15927-2:2009)Englische Fassung DIN EN ISO 15927-2:2009-07www.beuth.deDocument comprises pages14DIN EN ISO 15927-2:2009-07 National foreword This standard has been prepared by Technical Committee CEN/TC 89 “Thermal performance of bui

4、ldings and building components” (Secretariat: SIS, Sweden) in collaboration with Technical Committee ISO/TC 163 “Thermal performance and energy use in the built environment”. The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Stan

5、dards Committee), Technical Committee NA 005-56-99 AA Feuchte. The DIN Standard corresponding to the International Standard referred to in the EN ISO is as follows: ISO 15927-1 DIN EN ISO 15927-1 National Annex NA (informative) Bibliography DIN EN ISO 15927-1, Hygrothermal performance of buildings C

6、alculation and presentation of climatic data Part 1: Monthly and annual means of single meteorological elements 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15927-2 February 2009 ICS 07.060; 91.120.10 English Version Hygrothermal performance of buildings Calculation and presentation of

7、 climatic data Part 2: Hourly data for design cooling load (ISO 15927-2:2009) Performance hygrothermique des btiments Calcul et prsentation des donnes climatiques Partie 2: Donnes horaires pour la charge de refroidissement de conception (ISO 15927-2:2009) Wrme- und feuchteschutztechnisches Verhalten

8、 von Gebuden Berechnung und Darstellung von Klimadaten Teil 2: Stundendaten zur Bestimmung der Khllast (ISO 15927-2:2009) This European Standard was approved by CEN on 17 January 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving

9、 this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versio

10、ns (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions. CEN members are the national standards bodies of Austria, Belgium, Bu

11、lgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARD

12、IZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15927-2:2009: EContents Page Foreword 3 Introductio

13、n.4 1 Scope5 2 Normative references5 3 Terms, definitions, symbols and units6 3.1 Terms and definitions .6 3.2 Symbols and units.7 4 Method of determination.7 4.1 Sources of data7 4.2 Identification of the design days .7 5 Data for the design of air conditioning systems9 6 Presentation of the design

14、 days 10 7 Presentation of the data for the design of air conditioning systems 10 Annex A (informative) Example of the procedure for identifying a design day . 11 DIN EN ISO 15927-2:2009-07 EN ISO 15927-2:2009 (E) 2DIN EN ISO 15927-2:2009-07 EN ISO 15927-2:2009 (E) 3Foreword This document (EN ISO 15

15、927-2:2009) 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“. This European Standa

16、rd shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2009, and conflicting national standards shall be withdrawn at the latest by August 2009. Attention is drawn to the possibility that some of the elements of this

17、 document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Stand

18、ard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

19、Introduction The choice of design load for space cooling is a matter of balancing user needs against cost. On the one hand, users expect a cooling system to maintain the internal temperatures needed for health and comfort; on the other hand, very high cooling loads can arise from extreme meteorologi

20、cal conditions. It is usually uneconomic to design cooling systems for rare extremes, as this leads to high capital cost and, usually, to lower operational efficiency of the system. The highest cooling loads occur with a combination of high daily mean dry-bulb temperature and dewpoint temperature, h

21、igh daily total irradiation, low daily swing in temperature and low wind speed. Data are therefore needed on the values of these parameters when they occur in combination at specific return periods. DIN EN ISO 15927-2:2009-07 EN ISO 15927-2:2009 (E) 41 Scope This part of ISO 15927 gives the definiti

22、on and specifies methods of calculation and presentation of the monthly external design climate to be used in determining the design cooling load of buildings and the design of air conditioning systems. Depending on the building type, a range of parameters can be used to define the individual days o

23、f hourly or three-hourly data in each calendar month that impose a cooling load likely to be exceeded on 5 %, 2 % and 1 % of days. The parameters that are always used in the selection are dry-bulb temperature and total global solar irradiation (or sunshine hours). The daily swing in dry-bulb tempera

24、ture, dewpoint temperature and wind speed and any other parameters relevant to particular buildings may also be included. Hourly peak values of dry-bulb temperature and dewpoint temperature are needed for the design of air conditioning systems. 2 Normative references The following referenced documen

25、ts 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. ISO 15927-1, Hygrothermal performance of buildings Calculation and presentation o

26、f climatic data Part 1: Monthly means of single meteorological elements World Meteorological Organization (WMO), Guide to Meteorological Instruments and Methods of Observation, No. 8, 6th Edition, 19961)1) World Meteorological Organization: http:/www.wmo.ch/pages/catalogue/New%20HTML/frame/engfil/8.

27、html. DIN EN ISO 15927-2:2009-07 EN ISO 15927-2:2009 (E) 53 Terms, definitions, symbols and units 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 15927-1 and the following apply. 3.1.1 hourly value average of instantaneous values of a parameter mea

28、sured during an hour or value observed at a particular moment (e.g. on the hour) NOTE Hourly values can be estimated by interpolation from data measured at three-hour intervals. 3.1.2 daily mean value average of 24 hourly values or eight 3-hourly values of a parameter during a day from 00:00 to 23:0

29、0 or 01:00 to 24:00 3.1.3 dry-bulb temperature air temperature measured in a thermometer screen or with similar shielding from solar radiation 3.1.4 daily swing in dry-bulb temperature difference between the maximum and minimum dry-bulb temperatures in one day 3.1.5 dewpoint temperature temperature

30、to which air is cooled to become saturated with the same water vapour content 3.1.6 global solar irradiation on a horizontal surface total solar energy falling on a horizontal surface in a given period NOTE Global solar irradiation is the sum of the direct and diffuse solar irradiation received by t

31、he surface in the period. 3.1.7 summer external design day day from any calendar month with a specified return period for extreme values of the significant meteorological parameters, for example: temperature, temperature swing, dewpoint temperature, solar irradiation and wind speed DIN EN ISO 15927-

32、2:2009-07 EN ISO 15927-2:2009 (E) 63.2 Symbols and units Symbol Quantity Unit sI daily total global solar irradiation kWh/(m2d) sh daily total sunshine hours h v wind speed m/s v daily mean wind speed m/s dry-bulb temperature C daily mean dry-bulb temperature C ddewpoint temperature C d daily mean d

33、ewpoint temperature C swdaily swing in dry-bulb temperature K Subscript x%, as in px%,represents the value of a parameter that is exceeded on 100 - x % of days. 4 Method of determination 4.1 Sources of data Hourly files of meteorological data, containing at least the dry-bulb temperature and global

34、solar irradiation or sunshine hours for at least 10 years, shall be analysed. Other parameters, such as dewpoint temperature or daily swing in temperature and wind speed, may be included if design days are needed for specific purposes. The parameters used shall be fully reported. NOTE Global solar i

35、rradiation is preferred to sunshine hours as it gives a better index of the performance of the building; however, solar radiation data are available from very few stations compared to sunshine hours. Methods for calculating meteorological parameters are given in ISO 15927-1. The meteorological data

36、shall have been measured in accordance with WMO Guide No. 8, 1996. 4.2 Identification of the design days 4.2.1 The procedure in 4.2.2 to 4.2.5 describes the use of dry-bulb temperature, global solar irradiation or sunshine hours, dewpoint temperature, daily temperature swing and wind speed to constr

37、uct design days. The same principles may be applied to the use of any other parameters appropriate to specific buildings. 4.2.2 Identify the parameters that are to be used to construct the design days. Daily mean dry-bulb temperature and daily total global solar radiation or daily total sunshine hou

38、rs, shall be included in all cases; daily mean dewpoint temperature, daily temperature swing and daily mean wind speed may also be included. DIN EN ISO 15927-2:2009-07 EN ISO 15927-2:2009 (E) 7For each day in the data set, calculate: a) the daily mean dry-bulb temperature, ; b) the daily total globa

39、l solar irradiation,sI , or daily total sunshine hours,sh ; c) if relevant, the daily mean dewpoint temperature,d , the daily mean wind speed, v , and the daily swing in dry-bulb temperature, sw . 4.2.3 For each calendar month in the data set (i.e. all the January data taken together, all the Februa

40、ry data taken together, etc.) find the values of daily mean temperature and daily total solar irradiation or daily total sunshine hours exceeded on 1 %, 2 % and 5 % of days. If relevant, find the values of the daily mean dewpoint temperature that are reached or exceeded on 1 %, 2 % and 5 % of days a

41、nd the values of the daily temperature swing and daily mean wind speed that are exceeded on 99 %, 98 % and 95 % of days. These are: a) daily mean dry-bulb temperature,99% , 98% and 95% ; b) daily total global solar irradiation, s,99%I , s,98%I and s,95%I ; c) daily total sunshine hours, s,99%h ,s,98

42、%h and s,95%h ; d) daily mean dewpoint temperature, d,99% , d,98% andd,95% ; e) daily swing in dry-bulb temperature, sw,1% , sw,2% , and sw,5% ; f) daily mean wind speed, 1%v , 2%v and 5%v . 4.2.4 Define the initial intervals for each of the parameters to be the following: a) daily mean dry-bulb tem

43、perature,%x 0,5 C; b) daily total global solar irradiation, s, %xI 0,05 kWh/(m2d); c) daily total sunshine hours, s, %xh 0,5 h; d) if used, daily mean dewpoint temperature, d, %x 0,5 C; e) if used, daily swing in dry-bulb temperature, sw, %x 0,5 K; f) if used, daily mean wind speed, %xv 0,5 m/s. whe

44、re x% is the risk factor in percent. DIN EN ISO 15927-2:2009-07 EN ISO 15927-2:2009 (E) 84.2.5 For each calendar month and for each of the three risk levels, identify days on which the daily means of all the parameters used fall within the error bands. There are three possibilities. a) If for any mo

45、nth, M, and risk level, x%, only one day is identified, this is the design day for that month and risk level. b) If for any month, M, and risk level, x%, more than one day is identified, progressively reduce the intervals defined above, one at a time and in the following order 1) the dry-bulb temper

46、ature in steps of 0,1 C, 2) the global solar irradiation in steps of 0,01 kWh/(m2d), or the daily total sunshine hours in steps of 0,1 h, 3) if used, the dewpoint temperature in steps of 0,1 C, 4) if used, the daily swing in dry-bulb temperature in steps of 0,1 K, 5) if used, the wind speed in steps

47、 of 0,1 m/s, until only one day is identified. This is the design day for that month and risk level. c) If for any month, M, and risk level, x%, no days are identified, progressively increase the intervals defined above, one at a time and in the following order 1) the dry-bulb temperature in steps o

48、f 0,1 C, 2) the global solar irradiation in steps of 0,01 kWh/(m2d), or the daily total sunshine hours in steps of 0,1 h, 3) if used, the dewpoint temperature in steps of 0,1 C, 4) if used, the daily swing in dry-bulb temperature in steps of 0,1 K, 5) if used, the wind speed in steps of 0,1 m/s, unt

49、il only one day is identified. This is the design day for that month and risk level. NOTE An example of this procedure for one month is given in Annex A. 5 Data for the design of air conditioning systems For all the hourly data in the data set, calculate the dry-bulb temperature exceeded on 1 %, 2 % and 5 % of occasions. These are 99%, 98%and 95%. For all the hours when the dry-bulb temperature is within the range 99% 0,1 C, calculate the dewpoint temperature exceeded on 1 % of occ