EN ISO 11855-2:2021/prA1

Building environment design - Embedded radiant heating and cooling systems - Part 2: Determination of the design heating and cooling capacity - Amendment 1 (ISO 11855-2:2021/DAM 1:2023)

Umweltgerechte Gebäudeplanung - Flächenintegrierte Strahlungsheiz- und -kühlsysteme - Teil 2: Bestimmung der Auslegungs-Heiz- und Kühlleistung (ISO 11855-2:2021/DAM 1:2023)

Conception de l'environnement des bâtiments - Systèmes intégrés de chauffage et de refroidissement par rayonnement - Partie 2: Détermination de la puissance calorifique et frigorifique à la conception - Amendement 1 (ISO 11855-2:2021/DAM 1:2023)

Načrtovanje notranjega okolja v stavbah - Vgrajeni sevalni ogrevalni in hladilni sistemi - 2. del: Določanje načrtovane grelne in hladilne moči - Dopolnilo A1 (ISO 11855-2:2021/DAM 1:2023)

General Information

• Status: Not Published
• Publication Date: 18-Nov-2024
• ICS: 91.040.01 - Buildings in general
• Technical Committee: CEN/TC 228 - Heating systems in buildings
• Drafting Committee: CEN/TC 228 - Heating systems in buildings
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 14-May-2023
• Completion Date: 14-May-2023
• Ref Project: SIST EN ISO 11855-2:2021/oprA1:2023 - Building environment design - Embedded radiant heating and cooling systems - Part 2: Determination of the design heating and cooling capacity - Amendment 1 (ISO 11855-2:2021/DAM 1:2023)

Relations

• Amends: EN ISO 11855-2:2021 - Building environment design - Embedded radiant heating and cooling systems - Part 2: Determination of the design heating and cooling capacity (ISO 11855-2:2021)
• Effective Date: 06-Oct-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 11855-2:2021/oprA1:2023
01-marec-2023
Načrtovanje notranjega okolja v stavbah - Vgrajeni sevalni ogrevalni in hladilni
sistemi - 2. del: Določanje načrtovane grelne in hladilne moči - Dopolnilo A1 (ISO
11855-2:2021/DAM 1:2023)
Building environment design - Embedded radiant heating and cooling systems - Part 2:
Determination of the design heating and cooling capacity - Amendment 1 (ISO 11855-
2:2021/DAM 1:2023)
Umweltgerechte Gebäudeplanung - Flächenintegrierte Strahlungsheiz- und -
kühlsysteme - Teil 2: Bestimmung der Auslegungs-Heiz- und Kühlleistung (ISO 11855-
2:2021/DAM 1:2023)
Conception de l'environnement des bâtiments - Systèmes intégrés de chauffage et de
refroidissement par rayonnement - Partie 2: Détermination de la puissance calorifique et
frigorifique à la conception - Amendement 1 (ISO 11855-2:2021/DAM 1:2023)
Ta slovenski standard je istoveten z: EN ISO 11855-2:2021/prA1
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
SIST EN ISO 11855-2:2021/oprA1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 11855-2:2021/oprA1:2023

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SIST EN ISO 11855-2:2021/oprA1:2023
DRAFT AMENDMENT
ISO 11855-2:2021/DAM 1
ISO/TC 205 Secretariat: ANSI
Voting begins on: Voting terminates on:
2023-01-19 2023-04-13
Building environment design — Embedded radiant heating
and cooling systems —
Part 2:
Determination of the design heating and cooling capacity
AMENDMENT 1
Conception de l'environnement des bâtiments — Systèmes intégrés de chauffage et de refroidissement par
rayonnement —
Partie 2: Détermination de la puissance calorifique et frigorifique à la conception
AMENDEMENT 1
ICS: 91.040.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO 11855-2:2021/DAM 1:2023(E)
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. © ISO 2023

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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2023(E)
DRAFT AMENDMENT
ISO 11855-2:2021/DAM 1
ISO/TC 205 Secretariat: ANSI
Voting begins on: Voting terminates on:

Building environment design — Embedded radiant heating
and cooling systems —
Part 2:
Determination of the design heating and cooling capacity
AMENDMENT 1
Conception de l'environnement des bâtiments — Systèmes intégrés de chauffage et de refroidissement par
rayonnement —
Partie 2: Détermination de la puissance calorifique et frigorifique à la conception
AMENDEMENT 1
ICS: 91.040.01
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO 11855-2:2021/DAM 1:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
  © ISO 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Building environment design — Embedded radiant heating
and cooling systems —
Part 2:
Determination of the design heating and cooling capacity
AMENDMENT 1

Foreword
Modify to the following:
The main changes compared to the previous edition are as follows:
— the type systems have been redefined
— update of the figures for system types based on the amendment,
— editorial corrections.
4  Symbols
Table 1- Symbols
Modify to the following:
Table 1 — Symbols
Symbol Unit Quantity
s m In system type II thickness of thermal insulation from the outward edge of the
h
insulation to the inward edge of the pipes (see Figure 2)
s m In system type II thickness of thermal insulation from the outward edge of the
l
insulation to the outward edge of the pipes (see Figure 2)
S m Thickness of the screed (excluding the pipes in system type I )
7   Simplified calculation methods for determining heating and cooling capacity or surface
temperature
Section 7
Modify to the following:
A given system construction can only be calculated with one of the simplified methods. The correct
method to apply depends on the system type I to IV (position of pipes, concrete or wooden construction)
and the boundary conditions listed in Table 2.
Delete Note.
Table 2 -Criteria for selection of simplified calculation method
Modify to the following:
1
© ISO 2022 – All rights reserved

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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Table 2 — Criteria for selection of simplified calculation method
New Old
Reference to
Pipe position system system Figure Boundary conditions
method
type type
In screed I A, C, H, 2 a) W ≥ 0,050 m s ≥ 0,01 m 7.1
u
I, J
Thermally decoupled from the struc- 0,008 m ≤ d ≤ 0,03 m A.2.2
tural base of the building by thermal
s /λ ≥ 0,01
u e
insulation
In insulation, conductive devices II B 2 b) 0,05 m ≤ W ≤ 0,45 m 7.1
Not wooden constructions except 0,014 m ≤ d ≤ 0,022 m A.2.3
for weight bearing and thermal dif-
0,01 m ≤ s /λ ≤ 0,18 m
u e
fusion layer
Plane section system D 2 c) 7.1,
A.2.4
In concrete slab V E 4 S /W ≥ 0,3 7.2,
T
B.1
Capillary tubes in concrete surface III F 5 d /W ≤ 0,2 7.2, B.2
a
Wooden constructions, pipes in sub IV G 6 λ ≥ 10 λ 7.2, Annex C
wl
floor or under sub floor, conductive
S ≥ 0,01
WL λ
devices
Clause 7.1 Universal single power functions
Modify to the following:
This calculation method is given in Annex A for the following five types of systems:
— System type I Pipes directly included in a thermal diffusion layer (see Figure 2)
— System type II Pipes included in thermal insulation layer with additional thermal conduction layer
(see Figure 3)
— System type III Capillary tubes directly included in a thermal diffusion layer (see Figure 4)
— System type IV Pipes with a thermal reflection layer and an air gap to floor covering (see Figure 4)
— System type V Pipes included directly in the structural construction (TABS) (see Figure 6)
Figure 3 shows the types as embedded in the floor, but the methods can also be applied for wall and
ceiling systems with a corresponding position of the pipes.
Figure 2 a) Type A and C
Modify with the following:
2
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Key
D external diameter of the pipe
ln thermal insulation layer
Pe pipes or electric cables
Pt protection layer
Sf surface layer
St structural layer
s thickness of the layer above the pipe
u
Td thermal diffusion layer
W pipe spacing
Figure 2 — System types I, pipes directly included in a thermal diffusion layer
Figure 2 b) Type B
Modify with the following:
Replace Figure 2 b) with the new figure 3.
3
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Key
ln thermal insulation layer
Pe pipes or electric cables
Pt protection layer
Sf surface layer
St structural layer
s thickness of the layer above the pipe
u
s thickness of heat conducting device
wl
Tc thermal conduction layer
Figure 3 — System types II, pipes included in a thermal insulation layer with additional thermal
conduction layer
Figure 2 c) Type D
Modify with the following:
Replace Figure 2 c) with the new figure 4.
4
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Key
Ct capillary tubes
ln thermal insulation layer
Pt protection layer
Sf surface layer
St structural layer
s thickness of the layer above the pipe
u
Td thermal diffusion layer
Figure 4 — System types III, capillary tubes directly included in a thermal diffusion layer
Figure 2 d) Type H
Modify with the following:
Replace Figure 2 d) with the new figure 5.
5
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Key
Ag air gap
ln thermal insulation layer
Jt joist
l distance between the joists
p
l thickness of the joist
w
Pe pipes or electric cables
Sc structural construction
Sf surface layer (floor covering)
s thickness of thermal insulation
ins
St structural layer
Tr thermal reflection layer
Figure 5 — System types IV, pipes with a thermal reflection layer and an air gap to floor
covering
Figure 2 e) Type I
Modify the following:
Replace Figure 2 e) with the new figure 6.
6
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Key
Pe pipes or electric cables
Sf surface layer
St structural layer\
Figure 6 — System types V, pipes included directly in the structure construction (TABS)
7.2 Thermal resistance methods
Modify with the following:
The concept is shown in Figure 7.
This calculation method, using the general resistance concept, is given in Annex B for the following two
types of systems:
— system type V with pipes embedded in massive concrete slabs (see Figure 6);
— system type III with capillary pipes embedded in a layer at the inside surface (see Figure 4).
Insert the following Figure 7:
Key
R external resistance
e
R equivalent resistance
HC
R internal resistance
i
Figure 7 — Basic network of thermal resistance
Figure 4
7
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Modify with the following:
Delete Figure 4 and insert new Figure 8 as shown:
Key
θ temperature
θ temperature of the thermal diffusion layer
Td
λ thermal conductivity
d external diameter of the pipe
a
s thickness
w pipe spacing
Figure 8 — Pipes embedded in a massive concrete layer, type V
Figure 5
Modify with the following:
Delete Figure 5 and replace with new Figure 9:
8
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Key
θ temperature
θ temperature of the thermal diffusion layer
Td
λ thermal conductivity
d external diameter of the pipe
a
R resistance between the pipes
ib
s thickness
w pipe spacing
Figure 9 — Capillary pipes embedded in a layer at the inner surface, type III
Figure 6
Modify with the following
Delete Figure 6 – Pipes in wood construction, type G
Annex A
A.1 General
Clause A.2.1 Table A.1
Modify with the following:
Table A.1 — Criteria for selection of the simplified calculation method
System Figure Boundary conditions Reference to meth-
type od
I Figure 2 T ≥ 0,050 m A.2.2
s ≥ 0,01 m
u
0,008 m ≤ D ≤ 0,03 m
s /λ ≥ 0,01
u e
II Figure 3 0,05 m ≤ T ≤ 0,45 m A.2.3
0,014 m ≤ D ≤ 0,022 m
0,01 m ≤ s /λ ≤ 0,18 m
u e
9
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SIST EN ISO 11855-2:2021/oprA1:2023
ISO 11855-2:2021/DAM 1:2022(E)
Clause A.2.2 Systems with pipes inside the screed (system type A, C, H, I, J)
Modify with the following:
A.2.2 Systems with pipes inside the screed (system type I)
For these systems (see Figure 2), the
...