EN ISO 11855-4:2015

Building environment design - Design, dimensioning, installation and control of embedded radiant heating and cooling systems - Part 4: Dimensioning and calculation of the dynamic heating and cooling capacity of Thermo Active Building Systems (TABS) (ISO 11855-4:2012)

ISO 11855-4:2012 allows the calculation of peak cooling capacity of Thermo Active Building Systems (TABS), based on heat gains, such as solar gains, internal heat gains, and ventilation, and the calculation of the cooling power demand on the water side, to be used to size the cooling system, as regards the chiller size, fluid flow rate, etc.
ISO 11855-4:2012 defines a detailed method aimed at the calculation of heating and cooling capacity in non-steady state conditions.

Umweltgerechte Gebäudeplanung - Planung, Auslegung, Installation und Steuerung flächenintegrierter Strahlheizungs- und -kühlsysteme - Teil 4: Auslegung und Berechnung der dynamischen Wärme- und Kühlleistung für thermoaktive Bauteilsysteme (TABS) (ISO 11855-4:2012)

Conception de l'environnement des bâtiments - Conception, construction et fonctionnement des systèmes de chauffage et de refroidissement par rayonnement - Partie 4: Dimensionnement et calculs relatifs au chauffage adiabatique et à la puissance frigorifique pour systèmes thermoactifs (TABS) (ISO 11855-4:2012)

ISO 11855-4:2012 permet de calculer la puissance frigorifique de pointe de systèmes d'éléments de construction thermoactifs (TABS) en se fondant sur les apports de chaleur, tels que les apports solaires, les apports de chaleur internes et la ventilation, ainsi que de calculer la demande en puissance frigorifique côté eau, afin de les utiliser pour dimensionner le système de refroidissement en ce qui concerne les dimensions du refroidisseur, le débit de fluide, etc.
La présente partie de l'ISO 11855 présente une méthode détaillée visant à calculer la puissance calorifique et frigorifique dans des conditions non stabilisées.
La série ISO 11855 s'applique aux systèmes de chauffage et de refroidissement de surface intégrés à eau dans les bâtiments résidentiels, commerciaux et industriels. Ces méthodes s'appliquent aux systèmes intégrés dans les murs, sols ou plafonds, sans ouverture à l'air libre. Elles ne s'appliquent pas aux systèmes de panneaux avec ouvertures à l'air libre, qui ne sont pas intégrés dans une structure de bâtiment.
La série ISO 11855 s'applique également, le cas échéant, à l'utilisation d'autres fluides que l'eau en tant que medium de chauffage ou de refroidissement. La série ISO 11855 ne s'applique pas à l'essai des systèmes. Ces méthodes ne s'appliquent pas aux panneaux ou poutres de plafond chauffés ou refroidis.

Načrtovanje gradnje - Načrtovanje, dimenzioniranje, montaža in kontrola vgrajenih hladilnih in ogrevalnih sistemov - 4. del: Dimenzioniranje in izračun zmogljivosti dinamičnega ogrevanja in hlajenja termoaktivnega gradbenega sistema (TAGS)" (ISO 11855-4:2012)

Ta evropski standard se uporablja za vgrajene ploskovne sisteme za ogrevanje in hlajenje z vodo v stanovanjskih, poslovnih ter industrijskih stavbah. Metode se uporabljajo za sisteme, vgrajene v stensko, talno ali stropno konstrukcijo brez odprtih vmesnih zračnih prostorov. Metode se ne uporabljajo za ogrevane ali hlajene stropne plošče ali tramove. Cilj tega standarda ni ocena hladilne obremenitve za dinamične simulacije, ampak zagotoviti navodilo za dimenzioniranje termoaktivnega gradbenega sistema (TABS), ki lahko omogoči uporabo obnovljivih virov energije. Ta standard omogoča izračun vršne zmogljivosti hlajenja termoaktivnega gradbenega sistema (na podlagi toplotnih dobičkov, kot so solarni dobički, notranji toplotni dobički in prezračevanje) in izračun zahteve glede moči hlajenja v zvezi z vodo, ki se uporablja za ocenjevanje hladilnega sistema, kar zadeva velikost naprave za hlajenje, hitrost pretoka tekočine itd. Ta standard določa celo podrobno metodo za izračun zmogljivosti ogrevanja in hlajenja v neustaljenih pogojih. Ustaljena zmogljivost ogrevanja se namesto tega izračuna v skladu z metodo B ali E v 2. delu te skupine standardov.

General Information

• Status: Withdrawn
• Publication Date: 04-Aug-2015
• Withdrawal Date: 31-Aug-2021
• ICS: 91.140.10 - Central heating systems
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 228 - Heating systems in buildings
• Drafting Committee: CEN/TC 228 - Heating systems in buildings
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 01-Sep-2021
• Ref Project: SIST EN ISO 11855-4:2015 - Building environment design - Design, dimensioning, installation and control of embedded radiant heating and cooling systems - Part 4: Dimensioning and calculation of the dynamic heating and cooling capacity of Thermo Active Building Systems (TABS) (ISO 11855-4:2012)

Relations

• Replaces: EN 15377-3:2007 - Heating systems in buildings - Design of embedded water based surface heating and cooling systems - Part 3: Optimizing for use of renewable energy sources
• Effective Date: 08-Jun-2022
• Replaced By: EN ISO 11855-4:2021 - Building environment design - Embedded radiant heating and cooling systems - Part 4: Dimensioning and calculation of the dynamic heating and cooling capacity of Thermo Active Building Systems (TABS) (ISO 11855-4:2021)
• Effective Date: 21-Feb-2018

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2015
1DGRPHãþD
SIST EN 15377-3:2007
1DþUWRYDQMHJUDGQMH1DþUWRYDQMHGLPHQ]LRQLUDQMHPRQWDåDLQNRQWURODYJUDMHQLK
KODGLOQLKLQRJUHYDOQLKVLVWHPRYGHO'LPHQ]LRQLUDQMHLQL]UDþXQ]PRJOMLYRVWL
GLQDPLþQHJDRJUHYDQMDLQKODMHQMDWHUPRDNWLYQHJDJUDGEHQHJDVLVWHPD
7$*6,62
Building environment design - Design, dimensioning, installation and control of
embedded radiant heating and cooling systems - Part 4: Dimensioning and calculation of
the dynamic heating and cooling capacity of Thermo Active Building Systems (TABS)
(ISO 11855-4:2012)
Umweltgerechte Gebäudeplanung - Planung, Auslegung, Installation und Steuerung
flächenintegrierter Strahlheizungs- und -kühlsysteme - Teil 4: Auslegung und
Berechnung der dynamischen Wärme- und Kühlleistung für thermoaktive Bauteilsysteme
(TABS) (ISO 11855-4:2012)
Conception de l'environnement des bâtiments - Conception, construction et
fonctionnement des systèmes de chauffage et de refroidissement par rayonnement -
Partie 4: Dimensionnement et calculs relatifs au chauffage adiabatique et à la puissance
frigorifique pour systèmes thermoactifs (TABS) (ISO 11855-4:2012)
Ta slovenski standard je istoveten z: EN ISO 11855-4:2015
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11855-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2015
ICS 91.140.10; 91.140.30 Supersedes EN 15377-3:2007
English Version
Building environment design - Design, dimensioning, installation
and control of embedded radiant heating and cooling systems -
Part 4: Dimensioning and calculation of the dynamic heating and
cooling capacity of Thermo Active Building Systems (TABS)
(ISO 11855-4:2012)
Conception de l'environnement des bâtiments - Conception, Umweltgerechte Gebäudeplanung - Planung, Auslegung,
construction et fonctionnement des systèmes de chauffage Installation und Steuerung flächenintegrierter
et de refroidissement par rayonnement - Partie 4: Strahlheizungs- und -kühlsysteme - Teil 4: Auslegung und
Dimensionnement et calculs relatifs au chauffage Berechnung der dynamischen Wärme- und Kühlleistung für
adiabatique et à la puissance frigorifique pour systèmes thermoaktive Bauteilsysteme (TABS) (ISO 11855-4:2012)
thermoactifs (TABS) (ISO 11855-4:2012)
This European Standard was approved by CEN on 30 July 2015.

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, 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 and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR 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 Ref. No. EN ISO 11855-4:2015 E
worldwide for CEN national Members.

Contents Page
European foreword .3
European foreword
The text of ISO 11855-4:2012 has been prepared by Technical Committee ISO/TC 205 “Building environment
design” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
11855-4:2015 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 February 2016, and conflicting national standards shall be withdrawn
at the latest by February 2016.
This standard is applicable for design, construction and operation of radiant heating and cooling systems. The
methods defined in part 2 are intended to determine the design heating or cooling capacity used for the design
and evaluation of the performance of the system.
For identifying product characteristics by testing and proving the thermal output of heating and cooling
surfaces embedded in floors, ceilings and walls the standard series EN 1264 can be used.

Attention is drawn to the possibility that some of the elements of this 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.
This document supersedes EN 15377-3:2007.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 and the United Kingdom.
Endorsement notice
The text of ISO 11855-4:2012 has been approved by CEN as EN ISO 11855-4:2015 without any modification.
INTERNATIONAL ISO
STANDARD 11855-4
First edition
2012-08-01
Building environment design — Design,
dimensioning, installation and control of
embedded radiant heating and cooling
systems —
Part 4:
Dimensioning and calculation of the
dynamic heating and cooling capacity of
Thermo Active Building Systems (TABS)
Conception de l'environnement des bâtiments — Conception,
construction et fonctionnement des systèmes de chauffage et de
refroidissement par rayonnement —
Partie 4: Dimensionnement et calculs relatifs au chauffage adiabatique
et à la puissance frigorifique pour systèmes thermoactifs (TABS)

Reference number
ISO 11855-4:2012(E)
©
ISO 2012
ISO 11855-4:2012(E)
©  ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 11855-4:2012(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations . 1
5 The concept of Thermally Active Surfaces (TAS) . 6
6 Calculation methods . 11
6.1 General . 11
6.2 Rough sizing method . 12
6.3 Simplified sizing by diagrams . 13
6.4 Simplified model based on finite difference method (FDM) . 19
6.4.1 Cooling system . 20
6.4.2 Hydraulic circuit and slab . 20
6.4.3 Room . 22
6.4.4 Limits of the method . 24
6.5 Dynamic building simulation programs . 25
7 Input for computer simulations of energy performance . 25
Annex A (informative) Simplified diagrams . 26
Annex B (normative) Calculation method . 31
B.1. Pipe level . 31
B.2. Thermal nodes composing the slab and room . 31
B.3. Calculations for the generic h-th hour . 35
B.4 Sizing of the system . 41
Annex C (informative) Tutorial guide for assessing the model . 42
Annex D (informative) Computer program . 44
Bibliography . 52

ISO 11855-4:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11855-4 was prepared by Technical Committee ISO/TC 205, Building environment design.
ISO 11855 consists of the following parts, under the general title Building environment design — Design,
dimensioning, installation and control of embedded radiant heating and cooling systems:
— Part 1: Definition, symbols, and comfort criteria
— Part 2: Determination of the design and heating and cooling capacity
— Part 3: Design and dimensioning
— Part 4: Dimensioning and calculation of the dynamic heating and cooling capacity of Thermo Active
Building Systems (TABS)
— Part 5: Installation
— Part 6: Control
Part 1 specifies the comfort criteria which should be considered in designing embedded radiant heating and
cooling systems, since the main objective of the radiant heating and cooling system is to satisfy thermal
comfort of the occupants. Part 2 provides steady-state calculation methods for determination of the heating
and cooling capacity. Part 3 specifies design and dimensioning methods of radiant heating and cooling
systems to ensure the heating and cooling capacity. Part 4 provides a dimensioning and calculation method to
design Thermo Active Building Systems (TABS) for energy-saving purposes, since radiant heating and cooling
...