Energy performance of buildings - Ventilation for buildings - Part 13: Calculation of cooling systems (Module M4-8) - Generation

The scope of this European Standard is:
-   To define the procedure how the calculation methods to determine the temperatures, loads, energy demands for the cooling generation shall be utilised in the design process.
-   To describe the calculation methods to determine the temperatures, loads, energy demands for cooling generation.
-   To provide guidelines for the Member States for national implementations of this standard.
This standard covers the cooling generation calculation of air conditioning systems. It takes into account the cooling generation system, which can consist of compression and absorption and other types of generators. It does not cover the cooling emission, distribution and storage, which are covered by prEN 15316-2, 15316-3 and prEN XXXXX-15, respectively.
Table 1 shows the relative position of this standard within the EN EPB package of standards.

Energetische Bewertung von Gebäuden - Lüftung von Gebäuden - Teil 13: Berechnung von Kühlsystemen (Modul M4-8) - Erzeugung

Der Anwendungsbereich dieser Europäischen Norm deckt Folgendes ab:
-   Definition der Art und Weise, wie die Berechnungsverfahren zur Bestimmung der Temperaturen, Lasten und Energiebedarfe für die Kälteerzeugung im Auslegungsprozess einzusetzen sind.
-   Beschreibung der Berechnungsverfahren zur Bestimmung der Temperaturen, Lasten und Energiebedarfe für die Kälteerzeugung.
-   Bereitstellung von Leitlinien für die Mitgliedstaaten zur nationalen Umsetzung dieser Norm.
Diese Norm deckt die Berechnung der Kälteerzeugung durch Klimaanlagen ab. Sie berücksichtigt das Kälteerzeugungssystem, das aus Kompressions-, Absorptions- und anderen Arten von Erzeugern bestehen kann. Sie behandelt nicht die Kälteemission, -verteilung und –speicherung, die jeweils durch prEN 15316-2, prEN 15316-3 und prEN 16798-15 abgedeckt werden.
Tabelle 1 zeigt die relative Position dieser Norm innerhalb des EPBD-Normenpakets.

Performance énergétique des bâtiments - Partie 13: Module M4-8 - Calcul des systèmes de refroidissement - Génération

Le domaine d’application de la présente Norme européenne est le suivant :
-   Définir le mode opératoire d'utilisation des méthodes de calcul dans le processus de conception afin de déterminer les températures, les charges et les demandes énergétiques pour la génération de froid.
-   Décrire les méthodes de calcul permettant de déterminer les températures, les charges et les demandes énergétiques pour la génération de froid.
-   Fournir des lignes directrices aux états membres pour la mise en œuvre de la norme à l'échelle nationale.
La présente norme couvre le calcul de la génération de froid pour les systèmes de conditionnement d'air. Elle tient compte du système de génération de froid, qui peut consister en un générateur à compression, à absorption ou autre. Elle ne couvre pas l'émission, la distribution ou le stockage de froid, qui sont respectivement couverts par le prEN 15316-2, 15316-3 et le prEN 16798-15.
Le Tableau 1 montre la position relative de la présente norme dans la série de normes EN PEB.

Energijske lastnosti stavb - Prezračevanje stavb - 13. del: Izračun za hladilne sisteme - Modul M4-8 - Proizvodnja

Področje uporabe tega evropskega standarda je:
– opredelitev postopka za ugotavljanje načina uporabe računskih metod za določanje temperatur, obremenitev in energijskih zahtev za hlajenje v postopku načrtovanja;
– opis računskih metod za določanje temperatur, obremenitev in energijskih zahtev za hlajenje;
– podajanje smernic za države članice za nacionalno uporabo tega standarda.
Ta standard zajema izračunavanje hlajenja klimatskih naprav. Upošteva hladilni sistem, ki lahko deluje na podlagi stiskanja in absorpcije, kot tudi druge vrste agregatov. Ne zajema pa področij emisij, porazdelitve in shranjevanja hlajenja, ki so zajeta v zadevnih standardih prEN 15316-2, 15316-3 in prEN XXXXX-15.
Preglednica 1 prikazuje relativen položaj tega standarda v sklopu standardov EN EPB.

General Information

Status
Published
Public Enquiry End Date
01-Mar-2015
Publication Date
13-Jun-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Dec-2017
Due Date
16-Feb-2018
Completion Date
14-Jun-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Energetische Bewertung von Gebäuden - Lüftung von Gebäuden - Teil 13: Berechnung von Kühlsystemen (Modul M4-8) - ErzeugungPerformance énergétique des bâtiments - Partie 13: Module M4-8 - Calcul des systèmes de refroidissement - GénérationEnergy performance of buildings - Ventilation for buildings - Part 13: Calculation of cooling systems (Module M4-8) - Generation91.140.30VLVWHPLVentilation and air-conditioning systemsICS:Ta slovenski standard je istoveten z:EN 16798-13:2017SIST EN 16798-13:2018en,fr,de01-julij-2018SIST EN 16798-13:2018SLOVENSKI

STANDARDSIST EN 15243:20071DGRPHãþD
SIST EN 16798-13:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16798-13
June
t r s y ICS
{ sä s t rä s râ
{ sä s v rä u r Supersedes EN
s w t v uã t r r yEnglish Version
Energy performance of buildings æ Part

s uã Module M væ z æ Calculation of cooling systems æ Generation Performance énergétique des bâtiments æ Partie

s uã Module M væ z æ Calcul des systèmes de refroidissement æ Génération
Energieeffizienz
von Gebäuden æ Teil

s uã M væ z Modul æBerechnung der Kühlsysteme æ Erzeugung This European Standard was approved by CEN on

t y February
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s x y { zæ s uã t r s y ESIST EN 16798-13:2018

EN 16798-13:2017 (E) 2 Contents Page European foreword ....................................................................................................................................................... 4 Introduction .................................................................................................................................................................... 7 1 Scope .................................................................................................................................................................... 9 2 Normative references ................................................................................................................................. 11 3 Terms and definitions ................................................................................................................................ 11 4 Symbols and subscripts ............................................................................................................................. 11 4.1 Symbols ............................................................................................................................................................ 11 4.2 Subscripts ........................................................................................................................................................ 12 5 Brief description of the methods ............................................................................................................ 12 5.1 Output of the method .................................................................................................................................. 12 5.2 General description of the methods ...................................................................................................... 14 5.3 Selection criteria between the methods .............................................................................................. 14 6 Calculation method, method 1................................................................................................................. 14 6.1 Output data ..................................................................................................................................................... 14 6.2 Calculation intervals ................................................................................................................................... 16 6.3 Input data ........................................................................................................................................................ 16 6.3.1 Source of data, general ............................................................................................................................... 16 6.3.2 Product data ................................................................................................................................................... 16 6.3.3 Configuration and system design data ................................................................................................. 20 6.3.4 Operating conditions .................................................................................................................................. 21 6.3.5 Constants and physical data ..................................................................................................................... 22 6.3.6 Input data from Annex A (Annex B) ...................................................................................................... 22 6.4 Calculation procedure, method 1 ........................................................................................................... 22 6.4.1 Applicable time

intervals ......................................................................................................................... 22 6.4.2 Operating conditions calculation ........................................................................................................... 22 6.4.3 Calculation ...................................................................................................................................................... 27 7 Calculation method, method 2................................................................................................................. 30 7.1 Output data ..................................................................................................................................................... 30 7.2 Calculation intervals ................................................................................................................................... 31 7.3 Input data ........................................................................................................................................................ 32 7.3.1 Product data ................................................................................................................................................... 32 7.3.2 System design data ...................................................................................................................................... 35 7.3.3 Operating conditions .................................................................................................................................. 36 7.4 Calculation procedure, method 2 ........................................................................................................... 36 7.4.1 Applicable time interval ............................................................................................................................ 36 7.4.2 Operating conditions calculation ........................................................................................................... 36 7.4.3 Calculation ...................................................................................................................................................... 42 8 Quality control .............................................................................................................................................. 44 9 Compliance check......................................................................................................................................... 44 SIST EN 16798-13:2018

EN 16798-13:2017 (E) 3 Annex A (normative)

Input and method selection data sheet — Template ........................................... 45 A.1 General ............................................................................................................................................................. 45 A.2 References ....................................................................................................................................................... 46 A.3 Input data method 1 .................................................................................................................................... 46 A.3.1 Product description data ........................................................................................................................... 46 A.3.2 Product technical data tables ................................................................................................................... 46 A.3.3 System design data ....................................................................................................................................... 47 A.4 Input data method 2 .................................................................................................................................... 48 A.4.1 Product description data ........................................................................................................................... 48 A.4.2 Product technical data ................................................................................................................................ 48 A.4.3 System design data ....................................................................................................................................... 48 Annex B (informative)

Input and method selection data sheet — Default choices ............................. 55 B.1 General ............................................................................................................................................................. 55 B.2 References ....................................................................................................................................................... 56 B.3 Input data method 1 .................................................................................................................................... 56 B.3.1 Product description data ........................................................................................................................... 56 B.3.2 Product technical data tables ................................................................................................................... 56 B.3.3 System design data ....................................................................................................................................... 57 B.4 Input data method 2 .................................................................................................................................... 58 B.4.1 Product description data ........................................................................................................................... 58 B.4.2 Product technical data ................................................................................................................................ 58 B.4.3 System design data ....................................................................................................................................... 59 Bibliography ................................................................................................................................................................. 67

SIST EN 16798-13:2018

EN 16798-13:2017 (E) 4 European foreword This document (EN 16798-13:2017) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”, the secretariat of which is held by BSI. 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 2017 and conflicting national standards shall be withdrawn at the latest by December 2017. 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, together with parts 9 and 11 of the series, supersedes EN 15243:2007, which was produced to meet the requirements of Directive 2002/91/EC 16 December 2002 on energy performance of buildings referred to as “EPBD”. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This standard 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 Conveners, 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 Number Recast EPBD EN Number Title EN 15251 EN 16798-1 Energy performance of buildings – Ventilation for buildings – Part 1:

Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics (Module M1-6)

N/A CEN/TR 16798-2 Energy performance of buildings – Ventilation for buildings – Part 2: Interpretation of the requirements in EN 16798-1

– Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics (Module M1-6)

EN 13779 EN 16798-3 Energy performance of buildings – Ventilation for buildings – Part 3: For non-residential buildings – Performance requirements for ventilation and room-conditioning systems (Modules M5-1, M5-4)

SIST EN 16798-13:2018

EN 16798-13:2017 (E) 5 N/A CEN/TR 16798-4 Energy performance of buildings – Ventilation for buildings –

Part 4: Interpretation of the requirements in EN 16798- 3 – For non-residential buildings – Performance requirements for ventilation and room-conditioning systems (Modules M5-1, M5-4)

EN 15241 EN 16798-5-1 Energy performance of buildings – Ventilation for buildings – Part 5-1: Calculation methods for energy requirements of ventilation and air conditioning systems (Modules M5-6, M5-8, M6-5, M6-8, M7-5, M7-8)

– Method 1: Distribution and generation

EN 15241 EN 16798-5-2 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: Distribution and generation

N/A CEN/TR 16798-6 Energy performance of buildings – Ventilation for buildings – Part 6: Interpretation of the requirements in EN 16798-5–1 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) EN 15242 EN 16798-7 Energy performance of buildings – Ventilation for buildings – Part 7: Calculation methods for the determination of air flow rates in buildings including infiltration (Module M5-5)

N/A CEN/TR 16798-8 Energy performance of buildings – Ventilation for buildings – Part 8: Interpretation of the requirements in EN 16798-7 – Calculation methods for the determination of air flow rates in buildings including infiltration – (Module M5-5)

EN 15243 EN 16798-9

Energy performance of buildings – Ventilation for buildings – Part 9: Calculation methods for energy requirements of cooling systems

(Modules M4-1, M4-4, M4-9) – General

N/A CEN/TR 16798-10 Energy performance of buildings – Ventilation for buildings – Part 10: Interpretation of the requirements in EN 16798-9 – Calculation methods for energy requirements of cooling systems (Module M4-1,M4-4, M4-9) – General

EN 15243 EN 16798-13 Energy performance of buildings – Ventilation for buildings – Part 13: Calculation of cooling systems (Module M4-8) – Generation SIST EN 16798-13:2018

EN 16798-13:2017 (E) 6 EN 15243 CEN/TR 16798-14 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 N/A EN 16798-15 Energy performance of buildings – Ventilation for buildings – Part 15: Calculation of cooling systems (Module M4-7) – Storage

N/A CEN/TR 16798-16 Energy performance of buildings – Ventilation for buildings – Part 16: Interpretation of the requirements in EN 16798-15 –

Calculation of cooling systems (Module M4-7) – Storage EN 15239 and EN 15240 EN 16798-17 Energy performance of buildings – Ventilation for buildings – Part 17: Guidelines for inspection of ventilation

and
air- conditioning systems (Module M4-11, M5-11, M6-11, M7-11)

N/A CEN/TR 16798-18 Energy performance of buildings – Ventilation for buildings –

Part 18: Interpretation of the requirements in EN 16798-17 – Guidelines for inspection of ventilation and

air-conditioning systems (Module M4-11, M5-11, M6-11, M7-11) 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 7 Introduction This 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 “set of EPB standards”. All EPB standards follow specific rules to ensure overall consistency, unambiguity and transparency. All EPB standards provide a certain flexibility with regard to the methods, the required input data and references to other EPB standards, by the introduction of a normative template in Annex A and Annex B with informative default choices. For the correct use of this standard a normative template is given in Annex A to specify these choices. Informative default choices are provided in Annex B. The main target groups of this standard are all the users of the set of EPB standards (e.g. engineers, regulators and programmers). Use by or for regulators: In case the standard is used in the context of national or regional legal requirements, mandatory choices may be given at national or regional level for such specific applications. These choices (either the informative default choices from Annex B or choices adapted to national / regional needs, but in any case following the template of this Annex A) can be made available as national annex or as separate (e.g. legal) document (national data sheet). NOTE So in this case: — the regulators will specify the choices; — the individual user will apply the standard to assess the energy performance of a building, and thereby use the choices made by the regulators. Topics addressed in this standard can be subject to public regulation. Public regulation on the same topics can override the default values in Annex B of this standard. Public regulation on the same topics can even, for certain applications, override the use of this standard. Legal requirements and choices are in general not published in standards but in legal documents. In order to avoid double publications and difficult updating of double documents, a national annex may refer to the legal texts where national choices have been made by public authorities. Different national annexes or national data sheets are possible, for different applications. It is expected, if the default values, choices and references to other EPB standards in Annex B are not followed due to national regulations, policy or traditions, that: — national or regional authorities prepare data sheets containing the choices and national or regional values, according to the model in Annex A. In this case the National Annex (e.g. NA) refers to this text; — or, by default, the national standards body will consider the possibility to add or include a National Annex in agreement with the template of Annex A, in accordance to the legal documents that give national or regional values and choices. Further target groups are parties wanting to motivate their assumptions by classifying the building energy performance for a dedicated building stock. More information is provided in the Technical Report accompanying this standard (CEN/TR 16798-14 [2], under preparation). EPB standards deal with energy performance calculation and other related aspects (like system sizing) to provide the building services considered in the EPBD. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 8 TC 156 deals with ventilation and air conditioning systems in buildings. Subjects covered by TC 156 are: — cooling load calculation; — energy performance calculation for ventilation, air conditioning, and cooling systems; — inspection of ventilation and air conditioning systems; and — installation and commissioning of ventilation and air conditioning systems. This standard specifies a method to calculate the cooling generation of compression, absorption and other types of refrigeration systems. This standard extends EN 15243:2007, which was developed during the first EPBD mandate. The extension for inclusion in the second mandate package was performed by CEN/TC 156 WG 21. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 9 1 Scope This European Standard covers the calculation of the operational parameters and the energy consumption of cooling generation systems. The cooling generation consists of: — cooling generators like compression and absorption chillers; — other (generic) generator types such as ground or surface water or direct use of ground heat from boreholes; and — different types of heat rejection (dry, wet, hybrid with outdoor air, other sink types). The methods cover: — the possibility of heat recovery of heat to be rejected for the use of heating and/or domestic hot water production, through the use of an interface to the M3-1 standard; and — a multi generator calculation. The document does not cover the cooling emission, distribution and storage systems, which are covered by the Module M4-5, M4-6 and M4-7 standards, respectively. It is directly connected to the general part of the cooling systems, the M4-1 standard. Table 1 shows the relative position of this standard within the set of EPB standards in the context of the modular structure as set out in EN ISO 52000-1:2017. NOTE 1 In CEN ISO/TR 52000-2 the same table can be found, with, for each module, the numbers of the relevant EPB standards and accompanying Technical Reports that are published or in preparation. NOTE 2 The modules represent EPB standards, although one EPB standard might cover more than one module and one module might be covered by more than one EPB standard, for instance a simplified and a detailed method respectively. See also Clause 2 and Tables A.1 and B.1. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 10 Table 1 — Position of this standard (in casu M4–8) within the modular structure of the set of EPB standards

Overarching Building (as such) Technical Building Systems
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic Hot water
Lighting
Building automation and
control
PV, wind, .. sub1 M1 M2
M3 M4 M5 M6 M7 M8 M9 M10 M11 1 General General General

2 Common terms and definitions; symbols, units and subscripts Building Energy Needs Needs

3 Applications (Free) Indoor Conditions without Systems Maximum Load and Power

4 Ways to Express Energy Performance Ways to Express Energy Performance Ways to Express Energy Performance

5 Building categories and Building Boundaries Heat Transfer by Transmission Emission and control

6 Building Occupancy and Operating Conditions Heat Transfer by Infiltration and Ventilation Distribution and control

7 Aggregation of Energy Services and Energy Carriers Internal Heat Gains Storage and control

8 Building zoning Solar Heat Gains Generation and control
EN 16798-13

9 Calculated Energy Performance Building Dynamics (thermal mass) Load dispatching and operating conditions

10 Measured Energy Performance Measured Energy Performance Measured Energy Performance

11 Inspection Inspection Inspection
12 Ways to Express Indoor Comfort
BMS
13 External Environment Conditions
14 Economic Calculation
a The shaded modules are not applicable. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 11 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. EN ISO 52000-1:2017, Energy performance of buildings — Overarching EPB assessment — Part 1: General framework and procedures EN 14511 (series), 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 12792:2003, Ventilation for buildings - Symbols, terminology and graphical symbols ISO 7345:1995, Thermal insulation – Physical quantities and definitions NOTE 1 Default references to EPB standards other than EN ISO 52000-1:2017 are identified by the EPB module code number and given in Annex A (normative template) and Annex B (informative default choice). NOTE 2 Example of EPB module code number: M5–5, or M5–5.1 (if module M5–5 is subdivided), or M5–5/1 (if reference to a specific clause of the standard covering M5–5). 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 7345:1995 and EN ISO 52000-1:2017 apply. NOTE The terms of EN ISO 52000-1:2017 that are indispensable for the understanding of the underlying standard are repeated here. 3.1 EPB standard standard that complies with the requirements given in EN ISO 52000-1:2017, CEN/TS 16628 and CEN/TS 16629 Note 1 to entry: CEN/TS 16628 and CEN/TS 16629 contain specific rules to ensure overall consistency, unambiguity, transparency and flexibility, supported by common templates. EN ISO 52000-1:2017, the overarching EPB standard, is indispensable for each EPB standard, because of the modular structure, common terms and definitions, symbols and subscripts and because it provides the general framework for the EPB assessment. [SOURCE: EN ISO 52000-1:2017] 4 Symbols and subscripts 4.1 Symbols For the purposes of this document, the symbols given in Clause 4 and Annex C of EN ISO 52000-1:2017 and the specific symbols listed in Table 2 apply. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 12 Table 2 — Symbols and units Symbol Quantity Unit EER energy efficiency ratio — f part-load factor -; % k part-load stage -; % p specific power kW/kW =heat ratio — 4.2 Subscripts For the purposes of this document, the subscripts given in Clause 4 and Annex C of EN ISO 52000-1:2017, EN 12792:2003 and the specific subscripts listed in Table 3 apply. Table 3 — Subscripts Subscript Term cvd covered evap evaporative hr heat rejection system n nominal op in operation PL part-load rej rejected wb wet-bulb 5 Brief description of the methods 5.1 Output of the method The methods cover the calculation of: — the electrical energy (in case of compression type systems) and the heat (in case of absorption type systems) consumption for a requested cooling energy; — the thermal energy being available for heat recovery; and — the auxiliary energy consumption for cooling generation (e.g. power of heat rejection system (distribution and ventilation), control, sensors and actors). The time interval of the output can be: — annual; — monthly; or — hourly, in accordance with the application of this standard. The system design options covered within this standard are illustrated in Figure 1. SIST EN 16798-13:2018

EN 16798-13:2017 (E) 13
Key A driving component M desorber B condenser

C expansion valve 1 basic thermodynamic circuit D evaporator 2 air-cooled condenser E cooling water pump 3 water-cooled condenser F cooling tower 3–1 dry heat rejection G chilled water pump 3–2 wet heat rejection H cooling emission (from chilled water) 3–3 hybrid heat rejection I cooling emission (from refrigerant) 4 compression type system J compressor 5 absorption type system K absorber 6 direct evaporation L solvent pump 7 indirect evaporation (i.e. chiller) Figure 1 — System design options covered within this standard SIST EN 16798-13:2018

EN 16798-13:2017 (E) 14 5.2 General de
...

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