Energy performance of buildings - Ventilation for buildings - Part 14: Interpretation of the requirements in EN 16798-13 - Calculation of cooling systems (Module M4-8) - Generation

This Technical Report refers to the standard EN 16798-13.
It contains information to support the correct understanding and use of this standard.

Energieeffizienz von Gebäuden - Lüftung von Gebäuden - Teil 14: Interpretation der Anforderungen der EN 16798-13 - Berechnung von Kühlsystemen (Modul M4-8) - Erzeugung

Performance énergétique des bâtiments - Ventilation des bâtiments - Partie 14 : Interprétation des exigences de l'EN 16798-13 - Calcul des systèmes de refroidissement (Module M4-8) - Génération

Le présent rapport technique fait référence à l'EN 16798-13.
Il contient des informations permettant d’assurer une compréhension et une utilisation correctes de cette norme.
Le présent rapport technique ne contient pas de disposition normative.

Energijske lastnosti stavb - Prezračevanje stavb - 14. del: Razlaga in utemeljitev EN 16798-13 - Izračun za hladilne sisteme - Modul M4-8 - Proizvodnja

To tehnično poročilo se nanaša na standard EN 16798-13.
Vsebuje informacije za pomoč pri pravilnem razumevanju in uporabi tega standarda.

General Information

Status
Published
Public Enquiry End Date
09-Jan-2017
Publication Date
13-Jun-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
17-May-2018
Due Date
22-Jul-2018
Completion Date
14-Jun-2018

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SLOVENSKI STANDARD
SIST-TP CEN/TR 16798-14:2018
01-julij-2018
1DGRPHãþD
SIST EN 15243:2007

(QHUJLMVNHODVWQRVWLVWDYE3UH]UDþHYDQMHVWDYEGHO5D]ODJDLQXWHPHOMLWHY

(1,]UDþXQ]DKODGLOQHVLVWHPH0RGXO03URL]YRGQMD

Energy performance of buildings - Ventilation for buildings - Part 14: Interpretation of the

requirements in EN 16798-13 - Calculation of cooling systems (Module M4-8) -
Generation

Energieeffizienz von Gebäuden - Lüftung von Gebäuden - Teil 14: Interpretation der

Anforderungen der EN 16798-13 - Berechnung von Kühlsystemen (Modul M4-8) -
Erzeugung
Performance énergétique des bâtiments - Ventilation des bâtiments - Partie 14 :

Interprétation des exigences de l'EN 16798-13 - Calcul des systèmes de refroidissement

(Module M4-8) - Génération
Ta slovenski standard je istoveten z: CEN/TR 16798-14:2017
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning systems
SIST-TP CEN/TR 16798-14:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 16798-14:2018
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SIST-TP CEN/TR 16798-14:2018
CEN/TR 16798-14
TECHNICAL REPORT
RAPPORT TECHNIQUE
June 2017
TECHNISCHER BERICHT
ICS 91.140.30; 91.120.10 Supersedes EN 15243:2007
English Version
Energy performance of buildings - Ventilation for buildings
- Part 14: Interpretation of the requirements in EN 16798-
13 - Calculation of cooling systems (Module M4-8) -
Generation
Energieeffizienz von Gebäuden - Lüftung von
Gebäuden - Teil 14: Interpretation der Anforderungen
der EN 16798-13 - Berechnung von Kühlsystemen
(Modul M4-8) - Erzeugung

This Technical Report was approved by CEN on 27 February 2017. It has been drawn up by the Technical Committee CEN/TC

156.

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, Serbia, 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

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16798-14:2017 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 7

1 Scope .................................................................................................................................................................... 9

2 Normative references .................................................................................................................................... 9

3 Terms and definitions ................................................................................................................................... 9

4 Symbols, subscripts and abbreviations................................................................................................... 9

5 Brief description of the methods and routing ...................................................................................... 9

5.1 Output of the method ..................................................................................................................................... 9

5.2 General description of the methods ......................................................................................................... 9

5.2.1 Method A............................................................................................................................................................. 9

5.2.2 Method B.......................................................................................................................................................... 10

5.3 Selection criteria between the methods .............................................................................................. 10

6 Calculation method - Method A ............................................................................................................... 11

6.1 Output data ..................................................................................................................................................... 11

6.2 Calculation time interval and calculation period ............................................................................. 11

6.3 Input data ........................................................................................................................................................ 11

6.3.1 Source of data ................................................................................................................................................ 11

6.3.2 Product data — Product technical data ............................................................................................... 12

6.3.3 System design data ...................................................................................................................................... 13

6.3.4 Operating conditions .................................................................................................................................. 13

6.3.5 Constants and physical data ..................................................................................................................... 13

6.4 Calculation procedure ................................................................................................................................ 13

6.4.1 Applicable calculation interval ............................................................................................................... 13

6.4.2 Operating conditions calculation ........................................................................................................... 13

6.4.3 Energy calculation ....................................................................................................................................... 14

7 Calculation method - Method B ............................................................................................................... 14

7.1 Output data ..................................................................................................................................................... 14

7.2 Calculation time interval and calculation period ............................................................................. 14

7.3 Input data ........................................................................................................................................................ 14

7.3.1 Product description data (qualitative) ................................................................................................ 14

7.3.2 Product technical data ............................................................................................................................... 15

7.3.3 System design data ...................................................................................................................................... 15

7.3.4 Operating conditions .................................................................................................................................. 16

7.3.5 Simplified input ............................................................................................................................................ 16

7.4 Calculation procedure ................................................................................................................................ 20

7.4.1 Assumptions ................................................................................................................................................... 20

7.4.2 Possible origin of errors ............................................................................................................................ 20

7.4.3 Possible iteration convergence problems ........................................................................................... 20

8 Quality control .............................................................................................................................................. 20

9 Compliance check......................................................................................................................................... 20

10 Worked out examples, method A — Example 1 ................................................................................ 20

10.1 Description ..................................................................................................................................................... 20

10.2 Calculation details ....................................................................................................................................... 30

10.3 Observations .................................................................................................................................................. 30

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11 Worked out examples, method B ............................................................................................................ 31

11.1 Example 1 ........................................................................................................................................................ 31

11.1.1 Description ...................................................................................................................................................... 31

11.1.2 Calculation details ........................................................................................................................................ 31

11.2 Example 2 ........................................................................................................................................................ 31

11.2.1 Description ...................................................................................................................................................... 31

11.2.2 Calculation details ........................................................................................................................................ 31

12 Validation of the calculation procedures ............................................................................................. 32

Annex A (informative) Input and method selection data sheet — Template ......................................... 33

A.1 General ............................................................................................................................................................. 33

A.2 References ....................................................................................................................................................... 33

A.3 Method A .......................................................................................................................................................... 33

A.4 Method B .......................................................................................................................................................... 33

Annex B (informative) Input and method selection data sheet — Default choices ............................. 34

B.1 General ............................................................................................................................................................. 34

B.2 References ....................................................................................................................................................... 34

B.3 Method A .......................................................................................................................................................... 34

B.4 Method B .......................................................................................................................................................... 34

Annex C (informative) Calculation examples .................................................................................................... 35

C.1 Spreadsheets .................................................................................................................................................. 35

C.2 Method A, example 1 ................................................................................................................................... 35

C.3 Method B, example 1 ................................................................................................................................... 50

C.4 Method B, example 2 ................................................................................................................................... 57

Annex D (informative) Illustrative Example of Estimation of Seasonal EER .......................................... 64

D.1 Introduction.................................................................................................................................................... 64

D.2 Load frequency distributions ................................................................................................................... 64

Bibliography ................................................................................................................................................................. 68

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European foreword

This document (CEN/TR 16798-14:2017) has been prepared by Technical Committee CEN/TC 156

“Ventilation for buildings”, the secretariat of which is held by BSI.

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 15243:2007.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

The necessary editorial revisions were made to comply with the requirements for each EPB Technical

Report.

This document has been produced to meet the requirements of Directive 2010/31/EU 19 May 2010 on

the energy performance of buildings (recast), referred to as “recast EPDB”.

For the convenience of Standards users CEN/TC 156, together with responsible Working Group

Convenors, have prepared a simple table below relating, where appropriate, the relationship between

the ‘EPBD’ and ‘recast EPBD’ standard numbers prepared by Technical Committee CEN/TC 156

“Ventilation for buildings”.
EPBD EN Recast EPBD EN
Title
Number Number
Energy performance of buildings – Ventilation for buildings –
Part 1: Indoor environmental input parameters for design
EN 15251 EN 16798-1 and assessment of energy performance of buildings
addressing indoor air quality, thermal environment, lighting
and acoustics (Module M1-6)
Energy performance of buildings – Ventilation for buildings –
Part 2: Interpretation of the requirements in EN 16798-1 –
Indoor environmental input parameters for design and
N/A CEN/TR 16798-2
assessment of energy performance of buildings addressing
indoor air quality, thermal environment, lighting and
acoustics (Module M1-6)
Energy performance of buildings – Ventilation for buildings –
Part 3: For non-residential buildings – Performance
requirements for ventilation and room-conditioning systems
EN 13779 EN 16798-3
(Modules M5-1, M5-4)
Energy performance of buildings – Ventilation for buildings –
Part 4: Interpretation of the requirements in EN 16798- 3 –
N/A CEN/TR 16798-4 For non-residential buildings – Performance requirements
for ventilation and room-conditioning systems (Modules M5-
1, M5-4)
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Energy performance of buildings – Ventilation for buildings –
Part 5-1: Calculation methods for energy requirements of
ventilation and air conditioning systems (Modules M5-6, M5-
EN 15241 EN 16798-5-1
8, M6-5, M6-8, M7-5, M7-8) – Method 1: Distribution and
generation
Energy performance of buildings – Ventilation for buildings –
Part 5-2: Calculation methods for energy requirements of
ventilation systems (Modules M5-6.2, M5-8.2) – Method 2:
EN 15241 EN 16798-5-2
Distribution and generation
Energy performance of buildings – Ventilation for buildings –
Part 6: Interpretation of the requirements in EN 16798-5–1
N/A CEN/TR 16798-6 and EN 16798-5-2 – Calculation methods for energy
requirements of ventilation and air conditioning systems
(Modules M5-6, M5-8, M 6-5, M6-8 , M7-5, M7-8)
Energy performance of buildings – Ventilation for buildings –
Part 7: Calculation methods for the determination of air flow
EN 15242 EN 16798-7
rates in buildings including infiltration (Module M5-5)
Energy performance of buildings – Ventilation for buildings –
Part 8: Interpretation of the requirements in EN 16798-7 –
N/A CEN/TR 16798-8
Calculation methods for the determination of air flow rates in
buildings including infiltration – (Module M5-5)
Energy performance of buildings – Ventilation for buildings –
EN 15243 EN 16798-9 Part 9: Calculation methods for energy requirements of
cooling systems (Modules M4-1, M4-4, M4-9) – General
Energy performance of buildings – Ventilation for buildings –
Part 10: Interpretation of the requirements in EN 16798-9 –
Calculation methods for energy requirements of cooling
N/A CEN/TR 16798-10
systems (Module M4-1,M4-4, M4-9) – General
Energy performance of buildings – Ventilation for buildings –
EN 15243 EN 16798-13 Part 13: Calculation of cooling systems (Module M4-8) –
Generation
Energy performance of buildings – Ventilation for buildings –

EN 15243 CEN/TR 16798-14 Part 14: Interpretation of the requirements in EN 16798-13 –

Calculation of cooling systems (Module M4-8) – Generation
Energy performance of buildings – Ventilation for buildings –
N/A EN 16798-15 Part 15: Calculation of cooling systems (Module M4-7) –
Storage
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Energy performance of buildings – Ventilation for buildings –
N/A CEN/TR 16798-16 Part 16: Interpretation of the requirements in EN 16798-15 –
Calculation of cooling systems (Module M4-7) – Storage
Energy performance of buildings – Ventilation for buildings –
EN 15239 and
EN 16798-17 Part 17: Guidelines for inspection of ventilation and air-
EN 15240
conditioning systems (Module M4-11, M5-11, M6-11, M7-11)
Energy performance of buildings – Ventilation for buildings –
Part 18: Interpretation of the requirements in EN 16798-17 –
N/A CEN/TR 16798-18
Guidelines for inspection of ventilation and air-conditioning
systems (Module M4-11, M5-11, M6-11, M7-11)
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Introduction
The set of EPB standards, Technical Reports and supporting tools

In order to facilitate the necessary overall consistency and coherence, in terminology, approach,

input/output relations and formats, for the whole set of EPB-standards, the following documents and

tools are available:

a) a document with basic principles to be followed in drafting EPB-standards: CEN/TS 16628, Energy

Performance of Buildings — Basic Principles for the set of EPB standards [1];

b) a document with detailed technical rules to be followed in drafting EPB-standards; CEN/TS 16629,

Energy Performance of Buildings — Detailed Technical Rules for the set of EPB-standards [2]; and

c) the detailed technical rules are the basis for the following tools:

1) a common template for each EPB-standard, including specific drafting instructions for the

relevant clauses,

2) a common template for each technical report that accompanies an EPB standard or a cluster of

EPB standards, including specific drafting instructions for the relevant clauses, and

3) a common template for the spreadsheet that accompanies each EPB standard, to demonstrate

the correctness of the EPB calculation procedures.

Each EPB-standard follows the basic principles and the detailed technical rules and relates to the

overarching EPB-standard, EN ISO 52000-1 [3].

One of the main purposes of the revision of the EPB-standards is to enable that laws and regulations

directly refer to the EPB-standards and make compliance with them compulsory. This requires that the

set of EPB-standards consists of a systematic, clear, comprehensive and unambiguous set of energy

performance procedures. The number of options provided is kept as low as possible, taking into

account national and regional differences in climate, culture and building tradition, policy and legal

frameworks (subsidiarity principle). For each option, an informative default option is provided

(Annex B).
Rationale behind the EPB Technical Reports

There is a risk that the purpose and limitations of the EPB standards will be misunderstood, unless the

background and context to their contents – and the thinking behind them – is explained in some detail

to readers of the standards. Consequently, various types of informative contents are recorded and made

available for users to properly understand, apply and nationally or regionally implement the EPB

standards.

If this explanation would have been attempted in the standards themselves, the result is likely to be

confusing and cumbersome, especially if the standards are implemented or referenced in national or

regional building codes.

Therefore each EPB standard is accompanied by an informative technical report, like this one, where all

informative content is collected, to ensure a clear separation between normative and informative

contents (see CEN/TS 16629 [2]):

— to avoid flooding and confusing the actual normative part with informative content;

— to reduce the page count of the actual standard; and
— to facilitate understanding of the set of EPB standards.
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This was also one of the main recommendations from the European CENSE project [5] that laid the

foundation for the preparation of the set of EPB standards.
This Technical Report

This Technical Report accompanies the suite of EPB standards on ventilation for buildings. It relates to

the European standard EN 16798-13, which forms part of a set of standards related to the evaluation of

the energy performance of buildings (EPB).

The role and the positioning of the accompanied standard in the set of EPB standards is defined in the

Introduction to the standard.
Accompanying spreadsheets

Concerning the accompanied standard EN 16798-13, the following spreadsheets were produced:

— EN 16798-13, Method A;
— EN 16798-13, Method B, example 1; and
— EN 16798-13, Method B, example 2.

In this Technical Report, examples of each of these calculation sheets are included.

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1 Scope
This Technical Report refers to the standard EN 16798-13.

It contains information to support the correct understanding and use of this standard.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE More information on the use of EPB module numbers for normative references between EPB standards

is given in CEN ISO/TR 52000-2.

EN 14511 (all parts), Air conditioners, liquid chilling packages and heat pumps with electrically driven

compressors for space heating and cooling

EN 14825, Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors,

for space heating and cooling - Testing and rating at part load conditions and calculation of seasonal

performance

EN 16798-13, Energy performance of buildings — Part 13: Module M4-8 — Calculation of cooling

systems — Generation
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 16798-13 apply.

NOTE More information on some key EPB terms and definitions is given in CEN ISO/TR 52000-2.

4 Symbols, subscripts and abbreviations

For the purposes of this document, the symbols, subscripts and abbreviations as mentioned and given

in the accompanied EPB standard, EN 16798-13, apply.
More information on key EPB symbols is given in CEN ISO/TR 52000-2.
5 Brief description of the methods and routing
5.1 Output of the method
No additional information beyond the accompanied standard.
5.2 General description of the methods
5.2.1 Method A

The method is designed for an hourly calculation, based on the operational conditions and system

design possibilities. It covers the cooling generator calculation including multiple generators, the heat

rejection devices and its control, and includes the possibility of “free cooling” in form of bypassing the

generator and using the heat rejection device directly when the climate conditions allow for. Also, heat

to be rejected is offered as a potential heat to be recovered on the heating/domestic hot water side.

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Three different generator types are distinguished: compression chillers, absorption chillers and a

“generic” type labelled “OTHER”, to cover e.g. the direct use of heat sinks like ground (boreholes),

ground water or surface water.

Three approaches are offered to calculate the compression chiller characteristics:

— characteristics based on EN 14825 values;
— characteristics based on one nominal EER (EN 14511 (all parts)); and
— unknown performance data.

For the heat rejection, dry, wet and mixed mode (hybrid) heat rejecters are covered as well as the use of

other heat sinks as ground, ground water or surface water, in association with the respective control

options.
5.2.2 Method B

The method is designed for an hourly or monthly calculation, based on the operational conditions and

system design possibilities. It covers the cooling generator calculation including the heat rejection and

includes the possibility of “free cooling” in form of bypassing the generator and using the heat rejection

device directly when the climate conditions allow for. Also, heat to be rejected is offered as a potential

heat to be recovered on the heating/domestic hot water side.

Two different generator types are distinguished: compression chillers, absorption chillers. Moreover,

direct-evaporating room air-conditioning systems are also applicable. See Method A for other systems,

such as, the direct use of heat sinks like ground (boreholes), ground water or surface water. Tabulated

or measured part-load data should be employed for the evaluation of the part-load behaviour.

For the heat rejection, dry, wet and mixed mode (hybrid) heat rejecters are covered.

The calculation includes the operation and control of multi generator set ups.
5.3 Selection criteria between the methods
The criteria for method selection are summarized in Table 1.
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Table 1 — Criteria for method selection
Criterion Method Method
A B
System status
Existing cooling generation system x x
New cooling generation system x x
Availability of data
Detailed part-load data according to EN 14825 available x
Detailed part-load data according to EN 14825 not available x x
System type
Compression or absorption chiller systems x x
Multi-split room air conditioning systems x
Other heat sinks (e.g. ground source heat exchanger, x
aquifer,)
Calculation interval
Hourly x x
Monthly x
Bin method x
Climatic data/pre calculated factors
Factors in compliance with climate or calculated x
Factors not in compliance with climate or not calculated x
6 Calculation method - Method A
6.1 Output data
No additional information beyond the accompanied standard.
6.2 Calculation time interval and calculation period
The method is designed for an hourly calculation interval.

Applications to any other calculation intervals and bins add complexity. An application in a bin method

structure is possible, if the load distribution to the temperature bins can be reasonably determined. An

example calculation for this, originating from EN 15243, is given in Annex D.
Refer to method B for longer calculation intervals.
6.3 Input data
6.3.1 Source of data
No additional information beyond the accompanied standard.
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