prEN 16798-11

SLOVENSKI STANDARD
01-julij-2015
(QHUJHWVNDXþLQNRYLWRVWVWDYE0RGXO0,]UDþXQQDþUWRYDQHKODGLOQH
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Energy performance of buildings - Module M4-3 - Calculation of the design cooling load
Energieeffizienz von Gebäuden - Teil 11: Modul M4-3 - Berechnung der Norm-Kühllast
Performance énergétique des bâtiments - Partie 11 : Module M4-3 - Calcul de la charge
de refroidissement de conception
Ta slovenski standard je istoveten z: prEN 16798-11
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation
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
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 91.120.10; 91.140.30
English Version
Energy performance of buildings - Module M4-3- Calculation of
the design cooling load
Energieeffizienz von Gebäuden - Teil 11: Modul M4-3 -
Berechnung der Norm-Kühllast
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 156.

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, 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.
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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16798-11:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .6
3 Terms and definitions .7
4 Symbols and abbreviations .7
4.1 Symbols .7
4.2 Subscripts .7
5 Description of the methods.7
5.1 General .7
5.2 Output of the method .8
5.3 General description of the method .8
5.4 Selection criteria between the methods .8
6 Method .9
6.1 Output data .9
6.2 Calculation time steps .9
6.3 Input data .9
6.3.1 Source of data .9
6.3.2 Configuration and system design data — Process design .9
6.3.3 Operating or boundary conditions .9
6.4 Calculation procedure .9
6.4.1 Applicable timestep .9
6.4.2 Zoning . 10
6.4.3 Sensible cooling load calculation for a thermal zone. 10
6.4.4 Sensible heating load calculation for a thermal zone. 11
6.4.5 Sensible cooling and heating load calculation for a sub system . 12
6.4.6 Design supply air conditions for humidification and dehumidification . 12
Bibliography . 13

Foreword
This document (prEN 16798-11:2015) has been prepared by Technical Committee CEN/TC 156 “Ventilation
for buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
EN 16798 is currently composed with the following parts:
— prEN 16798-3, Energy performance of buildings — Part 3: Ventilation for non-residential buildings —
Performance requirements for ventilation and room-conditioning systems;
— prEN 16798-5-1, Energy performance of buildings — Part 5: Ventilation for buildings — Modules
M5-6, M5-8, M6-5, M6-8, M7-5, M7-8 — Calculation methods for energy requirements of ventilation
and air conditioning systems; (revision of EN 15241);
— prEN 16798-5-2, Energy performance of buildings — Modules M5-6, M5-8 — Ventilation for buildings —
Calculation methods for energy requirements of ventilation systems —- Part 5-2: Distribution and
generation (revision of EN 15241) — method 2;
— prEN 16798-7, Energy performance of buildings — Part 7: Ventilation for buildings — Modules M5-1, M5-
5, M5-6, M5-8 — Calculation methods for the determination of air flow rates in buildings including
infiltration;
— prEN 16798-9, Energy performance of buildings — Part 9: Ventilation for buildings — Module M4-1 —
Calculation methods for energy requirements Calculation methods for energy requirements of cooling
systems — General;
— prEN 16798-11, Energy performance of buildings — Module M4-3 — Calculation of the design cooling
load [the present document];
— prEN 16798-13, Energy performance of buildings — Part 13: Module M4-8 — Calculation of cooling
systems – Generation;
— prEN 16798-15, Energy performance of buildings — Part 15: Module M4-7 — Calculation of cooling
systems — Storage — General;
— prEN 16798-17, Energy performance of buildings — Part 17: Ventilation for buildings — Module M4-11,
M5-11, M6-11, M7-11 — Guidelines for inspection of ventilation and air conditioning systems.
Introduction
This draft Standard is part of a series of standards aiming at international harmonization of the methodology
for the assessment of the energy performance of buildings, called “EPB set of standards”.
As part of the “EPB set of standards” it complies with the requirements for the set of basic EPB documents
(prEN 15603, CEN/TS 16628 and CEN/TS 16629 (see [3] and [2]) developed under a mandate given to CEN
by the European Commission and the European Free Trade Association (Mandate M/480), and supports
essential requirements of EU Directive 2010/31/EU on the energy performance of buildings (EPBD).
Where appropriate, the method(s) in each of the EPB standards may provide simplified procedures and/or
default values as alternative options.
— Without further specification, these simplified procedures and/or default values may be used without
restricting criteria.
NOTE For instance because these are conservative procedures or values.
The term 'default values' should not be confused with 'informative values'. If the values are given in the
normative part of the standard, they are normative values. See also next options.
— In other cases, these simplified procedures and/or default values may be intended to be used only for
situations where there is limited information. This may be the case in existing buildings with limited
possibilities to acquire all input data. In particular when the EPB set of standards is used in the context of
national or regional building regulations, specific criteria when the simplified method and/or default data
are allowed, may be given at national or regional level, following the template in Annex A. Annex B
provides (informative) default choices.
TC 156 deals with ventilation and air conditioning systems in buildings. Subjects covered by TC 156 are:
a) energy performance calculation for ventilation, air conditioning and cooling systems;
b) inspection of ventilation and air conditioning systems;
This standard specifies the method and the boundary conditions for the calculation of the design cooling load,
including latent load, as a basis for the dimensioning of equipment on zone level and on central level for
cooling and dehumidification. It specifies also the methods and conditions for the calculation of the
humidification load.
The method given for the sensible cooling load can also be used for the calculation of the design heat load as
an alternative to the simplified method given in prEN 12831-1. This is intended especially for the cases where
the cooling load calculation needs to be done (i.e. when cooling is necessary) and/or an hourly calculation is
used for the energy needs calculation. The principle idea is that there is only one method needed for load and
energy calculations for heating and cooling in case of an hourly calculation interval.
This draft Standard replaces EN 15243:2007, Clauses 10 and 11. For the detailed description of the
calculation method, it refers to prEN ISO 52016-1.
The result is also of possible use for the checking of the appropriate sizing of the equipment at the occasion of
inspections.
1 Scope
Table 1 shows the relative position of this standard within the EN EPB set of standards.
Table 1 — Position of this standard within the EPB set of standards
Building
Overarching Technical Building Systems
(as such)
sub1 M1 M2  M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General General General
Common terms
and definitions; Building
2 Needs
symbols, units and Energy Needs
subscripts
(Free) Indoor
Maximum
Conditions
Applications Load and
without
Power
Systems
Ways to
Ways to
Ways to Express Express
Express
Energy Energy
Energy
Performance Performan
Performance
ce
Building Functions Heat Transfer Emission
5 and Building by and
Boundaries Transmission control
Building Heat Transfer
Distributio
Occupancy and by Infiltration
6 n and
Operating and
control
Conditions Ventilation
Aggregation of
Storage
Energy Services Internal Heat
7 and
and Energy Gains
control
Carriers
Generatio
Building Solar Heat
8 n and
Partitioning Gains
control
Load
Building
dispatchin
Calculated Energy Dynamics
9 g and
Performance (thermal
operating
mass)
conditions
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidifi
cation
Dehumidification
Domestic Hot
water
Lighting
Building
automation and
control
PV, wind, .
Building
Overarching Technical Building Systems
(as such)
sub1 M1 M2  M3 M4 M5 M6 M7 M8 M9 M10 M11
Measured
Measured
Measured Energy Energy
Energy
Performance Performan
Performance
ce
Inspection Inspection Inspection
Ways to Express
BMS
Indoor Comfort
External
13 Environment
Conditions
Economic
Calculation
The scope of this standard is to specify the calculation method and the boundary conditions for:
— the sensible design cooling load of a thermal zone;
— the
...