EN 17522:2023
(Main)Design and construction of backfilled and grouted borehole heat exchangers
Design and construction of backfilled and grouted borehole heat exchangers
This document covers standardization in the field of geological and environmental aspects, design, construction, operation, monitoring, maintenance and decommissioning of grouted borehole heat exchangers for uses in geothermal energy systems.
This document is only applicable for backfilled and grouted boreholes, it is not applicable for groundwater-filled boreholes.
Direct expansion and thermal syphon techniques are excluded from this document.
Planung und Bau von Erdwärmesonden
Dieses Dokument befasst sich mit der Normung von Erdwärmesonden für geothermische Anwendungen unter geologischen und Umweltaspekten und deckt dabei die Bereiche Auslegung, Ausführung, Betrieb, Überwachung, Wartung und Stilllegung von Erdwärmesonden in verpressten Bohrlöchern ab.
Dieses Dokument gilt nur für verfüllte und verpresste Bohrlöcher; es gilt nicht für grundwassergefüllte Bohrlöcher.
Techniken mit direkter Ausdehnung und Thermosiphonen werden in diesem Dokument nicht behandelt.
Conception et construction de sondes géothermiques verticales comblées et remplies de coulis
Le présent document concerne la normalisation des aspects géologiques et environnementaux de la conception, de la construction, du fonctionnement, de la surveillance, de la maintenance et du démantèlement des sondes géothermiques verticales remplies de coulis, pour les applications en géothermie.
Le présent document est uniquement applicable aux forages comblés et remplis de coulis, et non aux forages remplis d’eau souterraine.
Les techniques de détente directe et de thermosiphon sont exclues du présent document.
Zasnova in zgradba zasutih in z malto zalitih vrtinskih toplotnih izmenjevalnikov
Ta dokument zajema standardizacijo na področju geoloških in okoljskih vidikov, projektiranja, vrtanja, gradnje, izvedbe, delovanja, spremljanja, vzdrževanja, obnove in razgradnje izmenjevalnikov toplote v vrtinah za izkoriščanje geotermalne energije.
Tehnike neposrednega širjenja in termosifonske tehnike so izključene iz tega dokumenta.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2023
Zasnova in zgradba zasutih in z malto zalitih vrtinskih toplotnih izmenjevalnikov
Design and construction of backfilled and grouted borehole heat exchangers
Planung und Bau von Erdwärmesonden
Conception et construction de sondes géothermiques verticales comblées et remplies de
coulis
Ta slovenski standard je istoveten z: EN 17522:2023
ICS:
07.060 Geologija. Meteorologija. Geology. Meteorology.
Hidrologija Hydrology
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 17522
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2023
EUROPÄISCHE NORM
ICS 07.060; 27.190; 91.140.10
English Version
Design and construction of backfilled and grouted
borehole heat exchangers
Conception et construction de sondes géothermiques Planung und Bau von Erdwärmesonden
verticales comblées et remplies de coulis
This European Standard was approved by CEN on 23 January 2023.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard 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-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17522:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Geological and environmental aspects . 10
4.1 General. 10
4.2 Geological and hydrogeological risks . 11
4.2.1 Artesian aquifers . 11
4.2.2 Stacked aquifers with different groundwater potential . 11
4.2.3 Groundwater and soil chemistry . 11
4.2.4 Gas occurrence . 11
4.2.5 Ground stability . 11
4.2.6 Contrasting geological sequence (Alternated bedding) . 12
4.2.7 Karst geology . 12
4.2.8 Frost susceptibility . 13
4.2.9 Groundwater protection area . 13
4.3 Anthropogenic risks and constraints . 13
4.4 Environmental aspects . 13
4.4.1 General. 13
4.4.2 Influence on groundwater . 13
4.4.3 Environmental impact due to construction works . 14
5 System description . 15
5.1 General. 15
5.2 Borehole heat exchanger . 15
5.3 Horizontal piping . 17
5.4 Manifolds . 17
5.5 Thermal plant . 18
6 Materials . 18
6.1 General properties . 18
6.2 Materials . 18
6.2.1 Polymeric materials . 18
6.2.2 Connection methods . 20
6.2.3 Metallic materials . 21
6.3 Heat transfer fluid . 21
6.4 Backfilling materials . 22
6.4.1 General . 22
6.4.2 Grouting material . 22
6.4.3 Other backfilling materials requirements . 23
6.5 Component selection criteria . 23
6.5.1 General . 23
6.5.2 BHE loops . 23
6.5.3 Horizontal pipes . 24
6.5.4 Manifolds . 24
6.5.5 Heat transfer fluid . 24
7 Design . 24
7.1 Steps of design . 24
7.2 Sizing . 25
7.2.1 General . 25
7.2.2 General methodology . 26
7.2.3 Thermal properties of the ground . 29
7.2.4 Thermal Response Test (TRT) . 30
7.2.5 Calculation and modelling procedure . 37
7.2.6 Simulation . 38
7.2.7 Hydraulic design . 39
8 Construction . 40
8.1 General. 40
8.2 Site preparation and planning . 40
8.3 Drilling . 41
8.3.1 General. 41
8.3.2 Drilling diameter . 41
8.3.3 Drilling fluid . 41
8.3.4 Monitoring and documentation of the drilling process . 41
8.4 Borehole heat exchanger loop . 42
8.5 Borehole heat exchanger loop installation . 42
8.6 Backfilling and grouting procedure . 43
8.6.1 General. 43
8.6.2 Grouting procedure . 43
8.6.3 Other backfilling procedure. 44
8.7 Horizontal piping . 44
8.8 Testing and checking of BHE – Leakage, flow, grouting, geophysical measurements . 45
8.9 Manifolds . 45
9 Start-up . 46
9.1 General. 46
9.2 Heat transfer fluid . 46
9.3 Filling of the system .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.