DIN EN ISO 17628-2015 Geotechnical investigation and testing - Geothermal testing - Determination of thermal conductivity of soil and rock using a borehole heat exchanger (ISO 1762.pdf

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1、December 2015 English price group 16No part of this translation 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 27.080; 27.190; 93.020!%I;4“238

2、2417www.din.deDIN EN ISO 17628Geotechnical investigation and testing Geothermal testing Determination of thermal conductivity of soil and rock using a borehole heat exchanger (ISO 17628:2015);English version EN ISO 17628:2015,English translation of DIN EN ISO 17628:2015-12Geotechnische Erkundung und

3、 Untersuchung Geothermische Versuche Bestimmung der Wrmeleitfhigkeit von Boden und Fels unter Anwendung von Erdwrmesonden (ISO 17628:2015);Englische Fassung EN ISO 17628:2015,Englische bersetzung von DIN EN ISO 17628:2015-12Reconnaissance et essais gotechniques Essais gothermiques Dtermination de la

4、 conductivit thermique des sols et des roches dans les sondes gothermiques (ISO 17628:2015);Version anglaise EN ISO 17628:2015,Traduction anglaise de DIN EN ISO 17628:2015-12www.beuth.deDocument comprises pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be

5、 considered authoritative.3311.15 DIN EN ISO 17628:2015-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 17628:2015) has been prepared by Technical Committee CEN/TC 341 “Geotechnical investigation and testing” (Secretariat: BSI, United Kingdom) in collaboration wit

6、h Technical Committee ISO/TC 182 “Geotechnics”. The responsible German body involved in its preparation was DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Working Committee NA 005-05-11 AA Bohr- und Entnahmeverfahren, Grundwassermessungen (SpA zu CEN/TC 341/WG

7、 1). The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 14688-1 DIN EN ISO 14688-1 ISO 14689-1 DIN EN ISO 14689-1 ISO 22475-1 DIN EN ISO 22475-1 National Annex NA (informative) Bibliography DIN EN ISO 14688-1, Geotechnical investigation an

8、d testing Identification and classification of soil Part 1: Identification and description DIN EN ISO 14689-1, Geotechnical investigation and testing Identification and classification of rock Part 1: Identification and description DIN EN ISO 22475-1, Geotechnical investigation and testing Sampling m

9、ethods and groundwater measurements Part 1: Technical principles for execution EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17628 July 2015 ICS 93.020; 13.080.20 English Version Geotechnical investigation and testing - Geothermal testing - Determination of thermal conductivity of soil an

10、d rock using a borehole heat exchanger (ISO 17628:2015) Reconnaissance et essais gotechniques - Essais gothermiques - Dtermination de la conductivit thermique des sols et des roches dans les sondes gothermiques (ISO 17628:2015) Geotechnische Erkundung und Untersuchung - Geothermische Versuche - Best

11、immung der Wrmeleitfhigkeit von Boden und Fels unter Anwendung von Erdwrmesonden (ISO 17628:2015) This European Standard was approved by CEN on 23 April 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th

12、e 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, Fren

13、ch, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria,

14、 Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey

15、and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref.

16、 No. EN ISO 17628:2015 E.1 Scope .2 Normative references 3 Terms and definitions .4 Symbols and abbreviations .5 Installation of borehole heat exchangers .5.1 Drilling rigs and ancillary equipment .5.1.1 General5.1.2 Requirements for the drilling rigs and equipment .5.2 Borehole heat exchangers, fil

17、ling, and annular space filling materials 5.2.1 Borehole heat exchanger material 5.2.2 Heat transfer fluid of the borehole heat exchanger tubes 5.2.3 Annular space filling material 5.3 General requirements prior to installation 5.3.1 Requirements on the drilling and installation site .5.3.2 Selectio

18、n of drilling techniques and installation methods 5.3.3 Preliminary information needed before starting drilling and installation 5.3.4 Environmental requirements 5.3.5 Safety requirements .5.4 Execution.5.4.1 Drilling .5.4.2 Installation of borehole heat exchangers 5.4.3 Annular space filling 115.4.

19、4 Functional testing 5.4.5 Site reinstatement 156 Geothermal response testing .156.1 General 156.2 Test equipment 166.3 Test procedure 166.4 Test results. 186.5 Evaluation of the test results . 17 Report .197.1 Field report . 197.1.1 Record of the installation of the heat exchanger tubes .7.1.2 Annu

20、lar space filling record 7.1.3 Checking record .7.1.4 Record of measured values and test results 7.1.5 Record of evaluated test results .7.2 Report of the results Annex A (informative) Example of a form for the preliminary information on the intended installation of heat exchanger .23Annex B (inform

21、ative) Field reports 25Annex C (informative) Example of the graphical presentation of the installed borehole heat exchanger and the geology along the borehole .Bibliography .Contents Page2 European foreword 3464477778888999910101010111282020212121213013DIN EN ISO 17628:2015-12EN ISO 17628:2015 (E) E

22、uropean foreword This document (EN ISO 17628:2015) has been prepared by Technical Committee CEN/TC 341 “Geotechnical Investigation and Testing”, the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 182 “Geotechnics”. This European Standard shall be given the stat

23、us of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2016, and conflicting national standards shall be withdrawn at the latest by January 2016. Attention is drawn to the possibility that some of the elements of this document may be the sub

24、ject 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 Standard: Austria, Belgium, B

25、ulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

26、 Turkey and the United Kingdom. Endorsement notice The text of ISO 17628:2015 has been approved by CEN as EN ISO 17628:2015 without any modification. 3 DIN EN ISO 17628:2015-12EN ISO 17628:2015 (E) 1 ScopeThis International Standard specifies requirements for the Geothermal Response Test (GRT). This

27、 test comprises the in situ determination of the thermal conductivity in saturated and unsaturated soil and rock in a heat exchanger installed in a borehole. For this test, liquid heat transfer media not subjected to phase changes are used.The thermal conductivity is an important parameter used in t

28、he design of thermal storage and thermal exchange systems.A Geothermal Response Test measures the temperature response to a thermal energy forcing of a borehole heat exchanger (BHE) or the extraction of thermal energy from a borehole. The temperature response is related to the thermal parameters of

29、the ground and borehole filling material, such as thermal conductivity and borehole resistivity, and is therefore used to obtain estimated or derived values of these parameters.This International Standard applies to heat exchangers installed in vertical or inclined boreholes with length up to e.g. 4

30、00 m and with a diameter of up to 200 mm.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the

31、referenced document (including any amendments) applies.ISO 14688-1, Geotechnical investigation and testing Identification and classification of soil Part 1: Identification and descriptionISO 14689-1, Geotechnical investigation and testing Identification and classification of rock Part 1: Identificat

32、ion and descriptionISO 22475-1, Geotechnical investigation and testing Sampling methods and groundwater measurements Part 1: Technical principles for executionEN 16228-1, Drilling and foundation equipment - Safety - Part 1: Common requirementsEN 16228-2, Drilling and foundation equipment - Safety -

33、Part 2: Mobile drill rigs for civil and geotechnical engineering, quarrying and mining3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 22475-1 and the following apply.3.1borehole heat exchangerBHEone or two U-tubes or one coaxial tube in a borehole thr

34、ough which the exchanger fluid circulatesNote 1 to entry: See Figure 1 and Figure 2.4 DIN EN ISO 17628:2015-12EN ISO 17628:2015 (E) Brrrss 01FEa) single U-tubeBEFsrrr0s1b) double U-tube c) coaxial tubeKeyr1borehole radius Fthermal conductivity of the annular space fillingriinner radius wthermal cond

35、uctivity of the inner borehole tuberaouter radius sthermal conductivity of the outer borehole tuberoinner radius of the outer tube Ethermal conductivity of the groundrsouter radius of the outer tube B tube spacingFigure 1 Cross-section of examples of borehole heat exchanger tubes5 DIN EN ISO 17628:2

36、015-12EN ISO 17628:2015 (E) 123645Key1 heat exchanger outlet2 heat exchanger inlet3 borehole wall4 annular space filling5 connection6 ground levelFigure 2 Example of a borehole heat exchanger including annular space filling3.2geothermal response testtest to obtain the thermal conductivity4 Symbols a

37、nd abbreviationsTable 1 List of symbols and abbreviationsSymbol Designation UnitA total cross sectional area of a conducting surface m2B tube spacing mH length of the borehole heat exchanger mk slopem mass of a substance kgcpvolume related thermal capacity J/m3/KQ heat supply Wr0borehole radius mrii

38、nner radius m6 DIN EN ISO 17628:2015-12EN ISO 17628:2015 (E) Symbol Designation Unitraouter radius mroinner radius of the outer tube mrsouter radius of the outer tube mRe Reynolds numberRbborehole resistanceT temperature CT0undisturbed ground temperature CTffluid temperature at time t Ct1minimum tes

39、t durationx thickness of the conducting surface separating two different temperatures m thermal conductivity W/m/KEthermal conductivity of the ground W/m/Keffeffective thermal conductivity W/m/Kestestimated thermal conductivity W/m/KFthermal conductivity of the annular space filling W/m/Ksthermal co

40、nductivity of the outer borehole tube W/m/Kwthermal conductivity of the inner borehole tube W/m/K5 Installation of borehole heat exchangers5.1 Drilling rigs and ancillary equipment5.1.1 GeneralThe drilling equipment selected shall be of the appropriate size and type in order to produce the required

41、quality.5.1.2 Requirements for the drilling rigs and equipmentDrilling rigs with appropriate stability, power, and equipment such as drill rods, casing, core barrels, and bits shall be selected in order that the required depth and stability of the borehole can be achieved.The drilling rig and equipm

42、ent shall allow all drilling functions to be adjusted accurately.When specified, the following drilling parameters should be measured and recorded against depth:a) penetration rate (m/min);b) drilled length (m);c) flushing medium recovery rate (l/min);d) azimuth and inclination (degree);e) borehole

43、diameter (mm);f) casing and casing length (m);g) flush medium.Table 1 (continued)7 DIN EN ISO 17628:2015-12EN ISO 17628:2015 (E) 5.2 Borehole heat exchangers, filling, and annular space filling materials5.2.1 Borehole heat exchanger materialThe material of the borehole heat exchanger tubes and botto

44、m concerning the following shall be selected related to the purpose and the design:a) quality;b) durability;c) corrosion;d) thermal resistance;e) impact resistance;f) hydraulic resistance;g) compressive strength;h) resistance to deformation;i) safety, related to contamination of the ground and groun

45、d water;j) dimensions (diameter, wall thickness, and distance).Plastic tubes shall have the quality of at least PE 100 black pipe for non-potable underground use and should be made of the same material as the borehole heat exchanger which will be installed for the later BHE-array.Tube spacers shall

46、be attached to U-tubes in order to avoid thermal shortcuts. The minimum spacer distance shall be at least 2 m.Beginning at the bottom of the borehole heat exchanger, the tubes shall possess length marks every meter in numerical order starting at zero and increasing to the end of the tubes to check t

47、he installed length at all times.5.2.2 Heat transfer fluid of the borehole heat exchanger tubesThe heat transfer fluid of the borehole heat exchanger tubes shall fulfil the requirements of the test design and the environmental regulations.Water or de-ionized water should be used because of its good

48、hydrodynamic properties and it does not endanger the ground and the groundwater, if a leakage of the borehole heat exchanger occurs.The specific thermal capacity of the heat transfer fluid shall be known.The use of antifreeze additives shall be justified. If used, the annular space filling has to be

49、 adapted to freezing and thawing conditions in order to avoid cracks.The design shall take into account the minimum temperature of the heat transfer fluid.5.2.3 Annular space filling materialThe annular space filling material shall provide the thermal transport from the ground to the borehole heat exchanger and vice versa. It shall seal the borehole to the ground level to prevent contaminants from entering and aquifers that might h