prEN 17671
(Main)Heating systems and water-based cooling systems in buildings - Design for water-based cooling systems
Heating systems and water-based cooling systems in buildings - Design for water-based cooling systems
This document specifies design criteria for closed water-based cooling systems in buildings. The requirements aim at achieving a proper technical quality level and maintaining the desired thermal indoor climate with minimum energy consumption.
Systems for dissipating process heat from industrial processes, for example, are not covered by this document.
This document does not amend product standards or product installation requirements. The document covers cooling systems of the following type (see Figure 1):
1) devices for the water-based heat rejection of the chilling system;
2) devices for chilling and storage of chilled water;
3) devices for the distribution of chilled water;
4) devices for the absorption of heat (“cooling emission”);
5) control devices;
6) safety devices.
Figure 1 - Schematic example of a water-based cooling system
The design of such systems is described in this document. Additional safety aspects for water-based cooling systems with local operating temperatures ≤ 0 °C are not covered by this document. The other clauses of this document are still valid for systems with local operating temperatures ≤ 0 °C.
This document does not cover the chilling system itself, but only the parts of the chilling system which are an integral part of the cooling system, including determination of the design performance. Furthermore, this document does not cover:
- the requirements for installation or instructions for operation, maintenance and use;
- the design of the system components (e.g. recooler, chilling system, coolers, pipes, safety devices etc.).
Heizungsanlagen und wassergeführte Kühlanlagen in Gebäuden - Planung von wassergeführten Kühlanlagen
Dieses Dokument legt die Planungskriterien für geschlossene wassergeführte Kühlanlagen in Gebäuden fest. Die Anforderungen zielen darauf ab, ein angemessenes technisches Qualitätsniveau zu erreichen und das gewünschte thermische Raumklima bei minimalem Energieverbrauch zu erhalten.
Anlagen zur Abfuhr von Prozesswärme aus beispielsweise industriellen Prozessen sind nicht Gegenstand dieser Norm.
Durch dieses Dokument ändern sich keine Produktnormen bzw. Anforderungen an die Installation von Produkten. Dieses Dokument umfasst Kühlanlagen des folgenden Typs (siehe Bild 1):
1) Einrichtungen zur wassergeführten Wärmeabfuhr der Kälteanlage;
2) Einrichtungen zur Kälteerzeugung und Speicherung des Kalt- bzw. Kühlwassers (im weiteren Verlauf als Kaltwasser bezeichnet);
3) Einrichtungen zur Kaltwasserverteilung;
4) Einrichtungen zur Absorption der Wärme („Kälteübergabe“);
5) Regeleinrichtungen;
6) Sicherheitseinrichtungen.
Bild 1 — Schematisches Beispiel für eine wassergeführte Kühlanlage
Die Planung von derartigen Anlagen wird in diesem Dokument beschrieben. Weitere Sicherheitsaspekte für wassergeführte Kühlanlagen mit lokal auftretenden Betriebstemperaturen ≤ 0 °C werden in diesem Dokument nicht behandelt. Die übrigen Abschnitte dieses Dokuments treffen jedoch auch auf Anlagen mit lokal auftretenden Betriebstemperaturen ≤ 0 °C zu.
Dieses Dokument behandelt nicht die Kälteanlage selbst, sondern nur die Teile der Kälteanlage, die ein integraler Bestandteil der Kühlanlage sind, einschließlich der Festlegung der geplanten Leistungsfähigkeit. Weiterhin behandelt dieses Dokument nicht:
die Anforderungen an die Installation bzw. Anleitungen zu Betrieb, Wartung und Nutzung;
die Auslegung der Anlagenkomponenten (z. B. Rückkühler, Kälteerzeugungssystem, Kühler, Rohrleitungen, Sicherheitseinrichtungen usw.).
Systèmes de chauffage et systèmes de refroidissement à eau dans les bâtiments - Conception des systèmes de refroidissement à eau
Le présent document spécifie des critères de conception pour les systèmes de refroidissement à eau fermés dans les bâtiments. Les exigences visent à atteindre un niveau de qualité technique adéquat et à maintenir le climat thermique intérieur souhaité avec une consommation énergétique minimum.
Les systèmes conçus pour dissiper la chaleur générée par un processus industriel, par exemple, ne sont pas couverts par le présent document.
Le présent document ne modifie pas les normes de produit ni les exigences d’installation des produits. Le présent document couvre les types de systèmes de refroidissement suivants (voir Figure 1) :
1) dispositifs pour l’évacuation de la chaleur par eau du système de réfrigération ;
2) dispositifs pour la réfrigération et le stockage de l’eau refroidie ;
3) dispositifs pour la distribution d’eau refroidie ;
4) dispositifs pour l’absorption de la chaleur (« émission d’air refroidi ») ;
5) dispositifs de commande ;
6) dispositifs de sécurité.
Figure 1 — Exemple de schéma d’un système de refroidissement à eau
La conception de tels systèmes est décrite dans le présent document. Les aspects de sécurité supplémentaires pour les systèmes de refroidissement à eau fonctionnant à une température ambiante ≤ 0 °C ne sont pas couverts par le présent document. Les autres articles du présent document demeurent toutefois applicables aux systèmes fonctionnant à une température ambiante ≤ 0 °C.
Le présent document ne couvre pas le système de réfrigération en lui-même, mais uniquement les parties du système de réfrigération qui font partie intégrante du système de refroidissement, y compris en ce qui concerne la détermination des performances théoriques. En outre, le présent document ne couvre pas :
— les exigences relatives à l’installation ou les instructions de fonctionnement, de maintenance et d’utilisation ;
— la conception des composants du système (par exemple, refroidisseurs secondaires, système de réfrigération, refroidisseurs, tuyaux, dispositifs de sécurité, etc.).
Sistemi za ogrevanje in hlajenje z vodo v stavbah - Projektiranje sistemov za hlajenje z vodo
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2024
Sistemi za ogrevanje in hlajenje z vodo v stavbah - Projektiranje sistemov za
hlajenje z vodo
Heating systems and water-based cooling systems in buildings - Design for water-based
cooling systems
Heizungsanlagen und wassergeführte Kühlanlagen in Gebäuden - Planung von
wassergeführten Kühlanlagen
Systèmes de chauffage et systèmes de refroidissement à eau dans les bâtiments -
Conception des systèmes de refroidissement à eau
Ta slovenski standard je istoveten z: prEN 17671
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2024
ICS 91.140.30
English Version
Heating systems and water-based cooling systems in
buildings - Design for water-based cooling systems
Heizungsanlagen und wassergeführte Kühlanlagen in
Gebäuden - Norm zu wassergeführten Kühlanlagen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 228.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17671:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and subscripts . 9
4.1 Symbols . 9
4.2 Subscripts . 10
5 System design requirements . 10
5.1 General requirements . 10
5.2 Requirements for preliminary design information . 11
5.3 Chilling system . 12
5.3.1 General. 12
5.3.2 Sizing . 12
5.3.3 Devices for water-based heat rejection system (recooler) . 12
5.4 Primary and secondary distribution circuits . 13
5.4.1 General. 13
5.4.2 Requirements for the chilled water . 13
5.4.3 Flow rate . 14
5.4.4 Circulation pumps . 14
5.4.5 Pipework . 14
5.4.6 Hydronic balancing . 15
5.5 Cooling emission system – coolers . 15
5.5.1 General. 15
5.5.2 Sizing . 16
5.5.3 Positioning of coolers . 16
5.5.4 Protection against damage to buildings and installations. 16
5.5.5 Unnecessary cooling consumption . 16
5.5.6 Cleaning . 17
5.6 Cooling system controls . 17
5.6.1 General. 17
5.6.2 Central control . 17
5.6.3 Local temperature control . 17
5.6.4 Zone control . 18
5.6.5 Supply temperature control . 18
5.6.6 Time control of cooling . 18
5.7 Safety arrangements . 19
5.7.1 General. 19
5.7.2 Protection against temperatures falling below the minimum system safety
temperature . 19
5.7.3 Safety valves, rating, design and arrangements . 19
5.7.4 Flow control device . 20
5.7.5 Pressurization systems . 20
5.8 Operational requirements . 21
5.8.1 General. 21
5.8.2 Provision for monitoring operating conditions . 21
5.8.3 Temperature/power controller . 21
5.8.4 Pressure maintaining control device . 21
5.8.5 Filling and feeding device . 21
5.9 Thermal insulation . 22
5.10 Preventing corrosion . 23
5.11 Documentation . 23
5.12 Instructions for maintainance, operation and use . 24
5.13 Installation and commissioning . 24
Annex A (informative) Information for the design of diaphragm expansion vessels (static
pressurization and pressurization stations (dynamic pressurization) for closed
systems . 25
A.1 General . 25
A.2 Expansion vessel size calculation . 27
Annex B (informative) Hydraulic schemes for heating and cooling . 31
B.1 General . 31
Bibliography . 37
European foreword
This document (prEN 17671:2024) has been prepared by Technical Committee CEN/TC 228 “Heating
systems and Water based Cooling Systems in Buildings”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
1 Scope
This document specifies design criteria for closed water-based cooling systems in buildings. The
requirements aim at achieving a proper technical quality level and maintaining the desired thermal
indoor climate with minimum energy consumption.
Systems for dissipating process heat from industrial processes, for example, are not covered by this
document.
This document does not amend product standards or product installation requirements. The document
covers cooling systems of the following type (see Figure 1):
1) devices for the water-based heat rejection of the chilling system;
2) devices for chilling and storage of chilled water;
3) devices for the distribution of chilled water;
4) devices for the absorption of heat (“cooling emission”);
5) control devices;
6) safety devices.
Figure 1 — Schematic example of a water-based cooling system
The design of such systems is described in this document. Additional safety aspects for water-based
cooling systems with local operating temperatures ≤ 0 °C are not covered by this document. The other
clauses of this document are still valid for systems with local operating temperatures ≤ 0 °C.
This document does not cover the chilling system itself, but only the parts of the chilling system which
are an integral part of the cooling system, including determination of the design performance.
Furthermore, this document does not cover:
— the requirements for installation or instructions for operation, maintenance and use;
— the design of the system components (e.g. recooler, chilling system, coolers, pipes, safety devices
etc.).
...
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