EN 17956:2024
(Main)Energy efficiency classes for technical insulation systems - Calculation method and applications
Energy efficiency classes for technical insulation systems - Calculation method and applications
This document is applicable to technical insulation systems of operational installations in industry and the building services, such as pipes, ducts, vessels, equipment and built-in components.
The document specifies methods for the energy efficiency classification of insulation systems for the abovementioned components with an operational temperature range of −30 °C up to 650 °C.
The document addresses plant operators, engineers of operational installations, as well as the involved contractors such as insulation contractors and pipefitting contractors.
The design of safe surface temperatures for personal protection, as well as the prevention of condensation, is outside the scope of this document.
This document also does not apply to water-based heating and cooling systems in buildings and does not apply to directly buried district heating and district cooling pipes.
Energieeffizienzklassen für technische Dämmsysteme - Berechnungsmethoden
Dieses Dokument ist auf technische Dämmsysteme von betrieblichen Installationen in der Industrie und der Haustechnik, wie z. B. Rohrleitungen, Kanäle, Behälter, Geräte und eingebaute Komponenten, anwendbar.
Das Dokument legt Verfahren zur Klassifizierung der Energieeffizienz von Dämmsystemen für die oben genannten Komponenten mit einem Betriebstemperaturbereich von −30 °C bis 650 °C fest.
Das Dokument richtet sich an Anlagenbetreiber, Ingenieure von betrieblichen Installationen sowie an die beteiligten Auftragnehmer wie z. B. Anbieter für Dämmung und Rohrleitungsbau.
Die Auslegung von sicheren Oberflächentemperaturen für den Personenschutz sowie die Verhinderung von Kondensatbildung liegen außerhalb des Anwendungsbereichs dieses Dokuments.
Dieses Dokument gilt auch nicht für wasserbasierte Heizungs- und Kühlungssysteme in Gebäuden und nicht für direkt verlegte Fernwärme- und Fernkälteleitungen.
Classes d’efficacité énergétique pour les systèmes d’isolation technique - Méthodes et applications de calcul
Le présent document s’applique aux systèmes d’isolation technique des installations opérationnelles de l’industrie et du bâtiment, comme les conduits, les gaines, les réservoirs, les équipements et les composants intégrés.
Ce document spécifie des méthodes de classement de l’efficacité énergétique des systèmes d’isolation pour les composants susmentionnés, en tenant compte d’une plage de températures de fonctionnement allant de −30 °C à 650 °C.
Il s’adresse aux exploitants d’installations, aux ingénieurs au sein des installations opérationnelles, ainsi qu’aux entrepreneurs concernés comme les entrepreneurs spécialisés dans l’isolation et dans la tuyauterie.
La conception de températures de surface sûres pour la protection personnelle, ainsi que la prévention de la condensation, ne relève pas du domaine d’application du présent document.
Ce document ne s’applique pas non plus aux systèmes de chauffage et de refroidissement hydrauliques des bâtiments ni aux conduits de chauffage et de refroidissement urbains directement enterrés.
Razredi energijske učinkovitosti za tehnične izolacijske sisteme - Računska metoda in uporaba
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2024
Razredi energijske učinkovitosti za tehnične izolacijske sisteme - Računska
metoda in uporaba
Energy efficiency classes for technical insulation systems - Calculation method and
applications
Heizungsanlagen und wassergeführte Kühlanlagen in Gebäuden -
Energieeffizienzklassen für technische Dämmsysteme - Berechnungsmethoden
Classes d’efficacité énergétique pour les systèmes d’isolation technique - Méthodes et
applications de calcul
Ta slovenski standard je istoveten z: EN 17956:2024
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
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.
EN 17956
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2024
EUROPÄISCHE NORM
ICS 91.120.10
English Version
Energy efficiency classes for technical insulation systems -
Calculation method and applications
Classes d'efficacité énergétique pour les systèmes Heizungsanlagen und wassergeführte Kühlanlagen in
d'isolation technique - Méthodes et applications de Gebäuden - Energieeffizienzklassen für technische
calcul Dämmsysteme - Berechnungsmethoden
This European Standard was approved by CEN on 29 April 2024.
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17956:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions, symbols, units and abbreviated terms . 5
3.1 Terms and definitions . 5
3.2 Symbols, units and abbreviated terms . 6
3.2.1 Symbols and units used in this document (according to ISO) . 6
3.2.2 Abbreviated terms used in this document . 7
4 Calculation method for energy efficiency classes. 7
4.1 General . 7
4.2 Determination of the maximum allowed density of heat flow rate . 7
5 Application of energy efficiency classes . 11
5.1 General . 11
5.2 Selection of the energy efficiency performance of the insulation system . 11
5.3 Designing phase of the operational installation . 11
5.4 Dimensioning of the insulation system . 11
5.4.1 General . 11
5.4.2 Verification process for insulation systems . 12
5.4.3 Verification process for built-in components (valves, flanges, etc.) . 12
Annex A (informative) Example calculation – How to estimate the indicative space requirement
for an insulation system for a selected energy efficiency class . 13
A.1 Assumptions for the examples . 13
A.2 Calculation . 13
Annex B (informative) Example calculation – Dimensioning of a specified energy efficiency class
insulation system for pipes . 17
B.1 Assumptions for the examples (The same values as in Annex A) . 17
B.2 Insulation system consisting of a mineral wool pipe section . 18
B.3 Insulation system consisting of microporous insulation pipe sections and mineral wool
blankets . 18
Annex C (informative) Example calculation – Dimensioning of a specified energy efficiency class
insulation system for built-in components . 20
C.1 Assumptions for the examples (the same values as in Annex B) . 20
C.2 Insulation system consisting of mineral wool blankets . 20
Annex D (informative) Tabulated indicative space requirement for insulation per energy
efficiency class . 21
Annex E (informative) Tabulated maximum allowed linear density of heat flow rate per energy
efficiency class . 24
Annex F (informative) Ecological optimum . 27
Bibliography . 29
European foreword
This document (EN 17956:2024) 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 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 December 2024, and conflicting national standards
shall be withdrawn at the latest by December 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.
Introduction
In the past, technical thermal insulation systems have been primarily designed according to operational
requirements, e.g. personal protection or maximum permissible heat loss.
This document creates a uniform basis for insulating technical systems with a focus on the efficient use
of resources.
For this purpose, a classification method is defined for technical insulation systems. Depending on the
operating temperature of the system to be insulated and its basic geometric shape, the calculation
method for permissible heat flux and an indicative space requirement for the insulation system are
specified. Energy efficiency classes are derived by the maximum permissible heat flux.
This classification is intended to create a uniform communication platform for all those involved in the
operation as well as the engineering and installation of insulation systems in plant construction and
technical building equipment. The energy efficiency classes specify in a practical way the maximum heat
loss and the minimum space requirement without specifying a concrete insulation solution.
1 Scope
This document is applicable to technical insulation systems of operational installations in industry and
the building services, such as pipes, ducts, vessels, equipment and built-in components.
The document specifies methods for the energy efficiency classification of insulation systems for the
abovementioned components with an operational temperature range of −30 °C up to 650 °C.
The document addresses plant operators, engineers of operational installations, as well as the involved
contractors such as insulation contractors and pipefitting contractors.
The design of safe surface temperatures for personal protection, as well as the prevention of
condensation, is outside the scope of this document.
This document also does not apply to water-based heating and cooling systems in buildings and does
not apply to directly buried district heating and district cooling pipes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN ISO 12241, Thermal insulation for building equipment and industrial installations — Calculation rules
(ISO 12241)
3 Terms and definitions, symbols, units and abbreviated terms
For the purposes of this document, the following terms, definitions, symbols, units and abbreviated
terms apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1 Terms and definitions
3.1.1
operational installation
stationary technical installation inside or outside of buildings, which is used for and directly supports
the operational purpose
EXAMPLE Appliances, vessels, columns, tanks, steam generators, pipe systems, cold and hot water and
ventilation installations, etc.
3.1.2
insulation system
insulation material including all other constituent parts
EXAMPLE Cladding, vapour barrier, supporting structure, etc.
3.1.3
operating temperature
temperature at which an industrial installation is generally operated
Note 1 to entry: Also referred to as fluid temperature or medium temperature.
3.1.4
ecological optimum
ecological optimum for a best-case insulation system, dimensioned for minimum total greenhouse gas
emissions over the life cycle
Note 1 to entry: This concerns manufacture, use and disposal.
3.1.5
density of heat flow rate
flow of energy per unit of area per unit of time
Note 1 to entry: The unit for walls is watt per square metre (W/m ).
3.1.6
linear density of heat flow rate
flow of energy per unit of length per unit of time
Note 1 to entry: The unit for cylindrical objects such as ducts is watt per metre (W/m).
3.1.7
average conditions
average values which are needed to calculate the heat loss of an insulation system throughout the year
Note 1 to entry: For example, ambient temperature and wind speed.
3.1.8
indicative space requirement for an insulation system
estimated insulation thickness based on a standard reference insulation material needed to achieve the
selected insulation energy efficiency class
3.2 Symbols, units and abbreviated terms
3.2.1 Symbols and units used in this document (according to ISO)
a width of the rectangular duct secti
...
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