oSIST prEN 15316-4-2:2022

Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 4-2: Space heating generation systems, heat pump systems, Module M3-8-2, M8-8-2

This document cover heat pumps for space heating, domestic hot water production and alternate operation, where the same heat pump delivers the heat to cover the space heating and domestic hot water heat requirement.
The document provides a calculation method under steady conditions that corresponds to one calculation interval.
This calculation is intended to be connected to the whole building calculation model and takes in account the external conditions and building controls that influence the energy requirements for heating supplied by the heat pump system.
The scope of this standard is to standardize the:
-   required inputs;
-   calculation methods;
-   required outputs;
of the generation for space heating and domestic hot water production of the following heat pump systems:
-   electrically-driven vapour compression cycle (VCC) heat pumps;
-   combustion engine-driven vapour compression cycle heat pumps;
-using combinations of heat source and heat sink listed in Table 1.
Table 1 - Heating sources and sinks
[table not represented]
This document does not cover sizing or inspection of heat pumps.
Heat pumps for cooling systems are taken into account in module M4–8. Other generation systems such as boilers are covered in other sub modules of part M3-8.
Table 2 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.
NOTE 1   The same table can be found in CEN ISO/TR 52000 2, 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 may cover more than one module and one module may 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.
Table 2 - Position of this standard, within the modular structure of the set of EPB standards
[table not represented]

Energetische Bewertung von Gebäuden - Verfahren zur Berechnung der Energieanforderungen und Nutzungsgrade der Anlagen - Teil 4-5: Wärmeerzeugung für die Raumheizung, Wärmepumpensysteme, Module M3-8-2, M8-8-2

Dieses Dokument deckt Wärmepumpen für die Raumheizung und Trinkwassererwärmung im Alternativ- oder Simultanbetrieb, bei denen die zur Deckung des Bedarfs für die Raumheizung und die Trinkwassererwärmung erforderliche Wärme von ein und derselben Wärmepumpe geliefert wird, ab.
Dieses Dokument stellt ein Berechnungsverfahren für Beharrungsbedingungen zur Verfügung, das einem Berechnungsintervall entspricht.
Diese Berechnung soll in das Berechnungsmodell für das gesamte Gebäude einbezogen werden und berücksichtigt die äußeren Bedingungen und die Gebäudeleittechnik, die die Energieanforderungen des für Heizzwecke gelieferten Wärmepumpensystems beeinflussen.
Ziel dieser Norm ist die Normung der:
-   notwendigen Eingabedaten;
-   Berechnungsverfahren;
-   notwendigen Ausgabedaten;
der Erzeugung für Raumheizung und Trinkwassererwärmung durch die folgenden Wärmepumpensysteme:
-   elektrisch angetriebene Kompressions-Wärmepumpen (en: vapour compression cycle, VCC);
-   verbrennungsmotorisch angetriebene Kompressions-Wärmepumpen;
-   thermisch angetriebene Dampfabsorptions-Wärmepumpen (en: vapour absorption cycle, VAC),
mit den in Tabelle 1 aufgeführten Kombinationen von Wärmequelle und Wärmesenke.
Tabelle 1 - Wärmequellen und Wärmesenken
[...]

Performance énergétique des bâtiments - Méthode de calcul des besoins énergétiques et des rendements des systèmes - Partie 4-2 : Systèmes de génération de chauffage des locaux, systèmes de pompes à chaleur Module M3-8-2, M8-8-2

Le présent document traite des pompes à chaleur pour le chauffage des locaux, la production d'eau chaude sanitaire et le fonctionnement alterné, où une seule et même pompe à chaleur fournit la chaleur nécessaire pour assurer les besoins en énergie calorifique pour le chauffage des locaux et la production d'eau chaude sanitaire.
Le présent document fournit une méthode de calcul dans des conditions stables qui correspondent à un intervalle de calcul.
Ce calcul est destiné à être connecté au modèle de calcul de l'ensemble du bâtiment et tient compte de l'influence des conditions extérieures et de la régulation du bâtiment sur les besoins énergétiques pour le chauffage satisfaits par le système de chauffage par pompe à chaleur.
Le domaine d'application de la présente norme est de normaliser :
-   les données d'entrée requises ;
-   les méthodes de calcul ;
-   les données de sortie requises ;
de la génération pour le chauffage des locaux et la production d'eau chaude sanitaire des systèmes de chauffage par pompe à chaleur suivants :
-   pompes à chaleur à compression de vapeur (VCC) à moteur électrique ;
-   pompes à chaleur à compression de vapeur à moteur à combustion ;
-   pompes à chaleur à absorption de vapeur (VAC) entraînées thermiquement ;
à l'aide des combinaisons de source de chaleur et de dissipateur thermique listées dans le Tableau 1.
Tableau 1 - Sources de chauffage et dissipateurs thermiques
[...]

Energijske lastnosti stavb - Metoda za izračun energijskih zahtev in učinkovitosti sistema - 4-2. del: Sistemi za pridobivanje toplote za ogrevanje, toplotne črpalke - Modula M3-8-2 in M8-8-2

General Information

• Status: Not Published
• Public Enquiry End Date: 25-May-2022
• ICS: 27.080 - Heat pumps
• ICS: 91.140.10 - Central heating systems
• Technical Committee: OGS - Heating for buildings
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 17-Mar-2022
• Due Date: 04-Aug-2022
• Completion Date: 25-May-2022
• Directive: 2010/31/EU - Directive 2010/31/eu of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast)
• Directive: 811/2013 - Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heater, temperature control and solar device and packages of combination heater, temperature control and solar device
• Directive: 812/2013 - Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device
• Directive: 813/2013 - Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters
• Directive: 814/2013 - Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks
• Mandate: M/480 - Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of standards for a methodology calculating the integrated energy performance of buildings and promoting the energy efficiency of buildings, in accordance with the terms set in the recast of the Directive on the energy performance buildings (2010/31/EU)
• Mandate: M/534 - [C(2015)2625] Standardisation request to the European standardisation organisations pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks and Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device
• Mandate: M/535 - [C(2016)2626) Standardisation request to the European standardisation organisations to draft harmonised European standards pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to eco-design requirements for space heaters and combination heaters and Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heaters, temperature control and solar device and packages of combination heater, temperature control and solar device
• Ref Project: prEN 15316-4-2 - Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 4-2: Space heating generation systems, heat pump systems, Module M3-8-2, M8-8-2

Relations

• Amends: SIST EN 15316-4-2:2018 - Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 4-2: Space heating generation systems, heat pump systems, Module M3-8-2, M8-8-2
• Effective Date: 24-Jul-2019
• Revised: SIST EN 15316-4-2:2018/AC:2018 - Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 4-2: Space heating generation systems, heat pump systems, Module M3-8-2, M8-8-2
• Effective Date: 12-May-2021

Overview

prEN 15316-4-2 - part of the CEN suite on Energy Performance of Buildings - specifies a standardized calculation method for the energy requirements and system efficiencies of heat pump systems used for space heating and domestic hot water (DHW). The standard defines a steady‑state, single‑interval calculation that links to whole‑building energy models and accounts for external conditions and building controls that influence heat pump energy delivery. It applies to electrically‑driven vapour compression cycle (VCC) heat pumps and combustion‑engine‑driven VCC heat pumps using the combinations of heat sources and sinks listed in Table 1 of the document.

Key topics and requirements

• Scope and system boundary: Covers generation for space heating and DHW when a single heat pump serves both services; excludes sizing and inspection. Cooling and other generation systems are handled in other modules.
• Standardized inputs and outputs: Mandatory input data sets (product data, operating conditions, system design) and required output metrics for system energy and auxiliary consumption.
• Calculation method: Steady‑state procedure for one calculation interval, intended to integrate with whole‑building models (modular approach per EN ISO 52000‑1).
• Source and sink modelling: Procedures for external air, exhaust air, ground (vertical/horizontal, DX), ground water, surface water and technical water temperatures.
• Performance mapping: Full‑load heat output and efficiency determination including extrapolation paths (Path A) and performance map options (Path B) for air‑to‑air and air‑to‑water heat pumps.
• Operational logic: Priority management, running time and load factor allocation, operational limits and authorization.
• Energy inputs: Calculation of main energy input, back‑up heater behaviour, combustion engine inputs, and auxiliary energy (external, standby, power‑off).
• Recoverable losses & attribution: Recoverable heat losses from the heat pump and allocation of multi‑priority results to services.
• Quality control and reporting: Requirements for calculation reports, error reporting and compliance checks.

Practical applications and users

• Energy modelers and simulation engineers integrating heat pump generation into building energy performance assessments
• HVAC designers and consultants assessing system efficiency and energy flows for space heating and DHW
• Product manufacturers and test labs providing standardized performance data for compliance
• Building certifiers, regulators and policymakers using a harmonized method to compare system options and demonstrate regulatory compliance
• Researchers analyzing comparative efficiencies of VCC and combustion‑engine heat pumps in building contexts

Related standards

• EN ISO 52000‑1 (modular EPB structure)
• Other prEN 15316 modules (M3‑8, M4‑8 for cooling and other generation systems)
• EN 14825 references for specific performance tests

Keywords: prEN 15316‑4‑2, heat pump systems, energy performance of buildings, calculation method, space heating, domestic hot water, VCC heat pumps, EN ISO 52000‑1.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2022
Energijske lastnosti stavb - Metoda za izračun energijskih zahtev in učinkovitosti
sistema - 4-2. del: Sistemi za pridobivanje toplote za ogrevanje, toplotne črpalke -
Modula M3-8-2 in M8-8-2
Energy performance of buildings - Method for calculation of system energy requirements
and system efficiencies - Part 4-2: Space heating generation systems, heat pump
systems, Module M3-8-2, M8-8-2
Energetische Bewertung von Gebäuden - Verfahren zur Berechnung der
Energieanforderungen und Nutzungsgrade der Anlagen - Teil 4-5: Wärmeerzeugung für
die Raumheizung, Wärmepumpensysteme, Module M3-8-2, M8-8-2
Performance énergétique des bâtiments - Méthode de calcul des besoins énergétiques
et des rendements des systèmes - Partie 4-2 : Systèmes de génération de chauffage
des locaux, systèmes de pompes à chaleur Module M3-8-2, M8-8-2
Ta slovenski standard je istoveten z: prEN 15316-4-2
ICS:
27.080 Toplotne črpalke Heat pumps
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2022
ICS 91.140.10
English Version
Energy performance of buildings - Method for calculation
of system energy requirements and system efficiencies -
Part 4-2: Space heating generation systems, heat pump
systems, Module M3-8-2, M8-8-2
Performance énergétique des bâtiments - Méthode de Energetische Bewertung von Gebäuden - Verfahren zur
calcul des besoins énergétiques et des rendements des Berechnung der Energieanforderungen und
systèmes - Partie 4-2 : Systèmes de génération de Nutzungsgrade der Anlagen - Teil 4-5:
chauffage des locaux, systèmes de pompes à chaleur Wärmeerzeugung für die Raumheizung,
Module M3-8-2, M8-8-2 Wärmepumpensysteme, Module M3-8-2, M8-8-2
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 228.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15316-4-2:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 9
3 Terms and definitions .10
4 Symbols and abbreviations .13
4.1 Symbols .13
4.2 Subscripts .13
5 Description of the methods .14
5.1 Output of the method .14
5.2 Alternative methods .15
5.3 Multiple heat generators .15
5.4 Multiple services within a calculation interval .15
5.5 System boundary .15
5.6 Auxiliary energy .15
6 Calculation method .16
6.1 Output data .16
6.2 Input data .17
6.2.1 General .17
6.2.2 Product data .17
6.2.3 Operating conditions .26
6.2.4 Other calculation parameters.27
6.2.5 Constants and physical data .28
6.3 Calculation time intervals .28
6.4 Calculation procedure flow chart .28
6.5 Required energy output for each service .28
6.5.1 Domestic hot water service (W) .28
6.5.2 Space heating service (H) .28
6.6 Source temperature .29
6.6.1 General .29
6.6.2 External air .29
6.6.3 Exhaust air .29
6.6.4 Ground heat exchanger, horizontal, water or brine .29
6.6.5 Ground heat exchanger, vertical, water or brine .30
6.6.6 Ground, direct expansion .30
6.6.7 Ground water .30
6.6.8 Surface water .31
6.7 Sink temperature .31
6.7.1 General .31
6.7.2 Indoor air .31
6.7.3 Ducted air (ventilation) .32
6.7.4 Technical water (heat transfer medium of the system) .32
6.7.5 Domestic hot water .32
6.8 Operational limits and authorisation .32
6.9 Priorities . 33
6.10 Full load heat power output. 33
6.10.1 General . 33
6.10.2 Extrapolated performance map (Path A from single value) . 34
6.10.3 Known performance map (Path A with more product data) . 36
6.10.4 EN 14825 air to air . 36
6.10.5 EN 14825 air to water . 37
6.11 Running time and load factor and output for each priority . 37
6.11.1 General . 37
6.11.2 Default time allocation criterion for priorities. 37
6.12 Main energy input . 39
6.12.1 General . 39
6.12.2 Path A . 39
6.12.3 Path B, air to air heat pumps . 49
6.12.4 Path B, air to water heat pumps . 55
6.12.5 Absorption/Adsorption heat pumps . 61
6.12.6 Combustion engine driven heat pumps . 61
6.13 Calculation of the back-up heater . 62
6.13.1 General . 62
6.13.2 Calculation procedure. 62
6.14 Auxiliary energy . 62
6.14.1 External auxiliary energy . 62
6.14.2 Auxiliary energy during stand-by . 63
6.14.3 Total auxiliary energy for priority pi . 64
6.14.4 Auxiliary energy during power-off . 64
6.15 Recoverable heat losses of the heat pump . 64
6.15.1 General . 64
6.15.2 Recoverable heat losses from auxiliary energy . 64
6.16 Attribution of results of priorities to services . 65
6.17 Data collection and partial performance indicators. 65
6.18 Total results . 66
7 Quality control . 66
7.1 Calculation report . 66
7.2 Error reporting . 67
8 Compliance check . 67
Annex A (normative) Template for input data . 68
A.1 General . 68
A.2 References . 69
A.3 Heat pump description data . 69
A.3.1 Heat pump fuel . 69
A.3.2 Back-up fuel . 69
A.3.3 Type of energy taken from the source . 69
A.4 Heat pump technical data . 70
A.4.1 Technical data for all calculation paths . 70
A.4.2 Technical data for Path A . 70
A.4.3 Technical data for Path B . 72
A.4.4 Performance map for Path B . 73
A.5 System design data (Time constant of distribution and emitters) . 75
A.6 Calculation parameters . 75
A.6.1 Extrapolation matrix coefficients.75
A.6.2 Maximum extrapolation .77
A.6.3 Default parameters for source temperature modelling .77
A.7 Calculation path choices .78
A.8 Priority management .81
Annex B (informative) Default values .82
B.1 General .82
B.2 References .82
B.3 Heat pump description data .83
B.3.1 Heat pump energy carrier .83
B.3.2 Back-up energy carrier .84
B.3.3 Type of energy taken from the source .84
B.4 Heat pump technical data .84
B.4.1 Technical data for all calculation paths .84
B.4.2 Technical data for Path A .85
B.4.3 Technical data for Path B .87
B.4.4 Performance map for Path B .88
B.5 System design data .90
B.6 Calculation parameters .91
B.6.1 Extrapolation matrix coefficients.91
B.6.2 Maximum extrapolation .95
B.6.3 Default parameters for source temperature modelling .96
B.7 Calculation path choices .97
B.8 Priority management . 100
Annex C (informative) Calculation flow chart . 101
Annex D (informative) Examples of filled in interpolation matrixes (path A). 107
Annex E (informative) Calculation examples for path B . 112
E.1 Scope of this annex . 112
E.2 Air-to-air heat pump with modulating mode of operation . 112
E.3 Air-to-water heat pump with modulating mode of operation . 123
E.4 Air-to-water heat pump with ON-OFF mode of operation . 133
Bibliography . 141

European foreword
This document (prEN 15316-4-2:2022) has been prepared by Technical Committee CEN/TC 228
“Heating systems and water based cooling systems in buildings”, the secretariat of which is held by DIN.
This document supersedes EN 15316-4-2:2017.
The main changes compared to EN 15316-4-2:2017 are:
1) inclusion of more types of heat pumps, such as air to air (direct expansion);
2) method B has been withdrawn;
3) path A and path B have been reviewed and integrated into a unique frame;
4) Annex A contains a template for the data and parameters used in the standards and Annex B a set of
default values. Default values given in Annex B may be overridden by a national annex.

Introduction
This document 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.
EPB standards deal with energy performance calculation and other related aspects (like system sizing)
to provide the building services considered in the EPBD.
CEN/TC 228 deals with water based heating and cooling systems in buildings. Subjects covered by
CEN/TC 228 are:
— energy performance calculation for heating and cooling systems;
— inspection of heating systems;
— design of heating systems and water-based cooling systems;
— installation and commissioning of heating systems.
This document specifies how to calculate the energy performance of heat pump systems used for
domestic hot water preparation or space heating purpose.
This document also includes direct expansion and/or condensation systems.
For the correct use of this standard, Annex A specifies the required choices and input data. Default choices
and input data are presented in Annex B. 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, in particular for the application within the context of EU Directives transposed into national
legal requirements. These choices can be made available as National Annex or as separate (e.g., legal)
document. If the default values and choices in Annex A are not followed due to national regulations, policy
or traditions, it is expected that:
— either the national standardization body will consider the possibility to add or include a National
Annex in agreement with the template of Annex A;
— or the national or regional authorities will, in the building regulations, reference the standard and
prepare data sheets containing the national or regional choices and values, in agreement with the
template of Annex A.
This updated document covers hourly calculation intervals.

1 Scope
This document cover heat pumps for space heating, domestic hot water production and alternate
operation, where the same heat pump delivers the heat to cover the space heating and domestic hot water
heat requirement.
The document provides a calculation method under steady conditions that corresponds to one calculation
interval.
This calculation is intended to be connected to the whole building calculation model and takes in account
the external conditions and building controls that influence the energy requirements for heating supplied
by the heat pump system.
The scope of this standard is to standardize the:
— required inputs;
— calculation methods;
— required outputs;
of the generation for space heating and domestic hot water production of the following heat pump
systems:
— electrically-driven vapour compression cycle (VCC) heat pumps;
— combustion engine-driven vapour compression cycle heat pumps;
— thermally-driven vapour absorption cycle (VAC) heat pumps,
using combinations of heat source and heat sink listed in Table 1.
Table 1 — Heating sources and sinks
Source Sink
Outdoor air Indoor air
Exhaust-air Ducted air
Indirect ground source with brine Technical water
Indirect ground source with water Domestic hot water
Direct ground source (DX, direct expansion)
Surface water
Ground water
This document does not cover sizing or inspection of heat pumps.
Heat pumps for cooling systems are taken into account in module M4–8. Other generation systems such
as boilers are covered in other sub modules of part M3-8.
Table 2 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.
NOTE 1 The same table can be found in CEN ISO/TR 52000-2, 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 may cover more than one module
and one module may 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.
Table 2 — Position of this standard, within the modular structure of the set of EPB standards
Building
Overarching Technical Building Systems
(as such)
sub M1 sub M2 sub  M3 M4 M5 M6 M7 M8 M9 M10 M11

1 General  1 General 1 General

Common
terms and
Building
2 definitions;  2 2 Needs
Energy Needs
symbols, units
and subscripts
(Free) Indoor
Conditions Maximum Load
3 Applications  3 3
without and Power
Systems
Ways to Ways to
Ways to
Express Express
4  4 4 Express Energy
Energy Energy
Performance
Performance Performance
Building
Heat Transfer
Functions and Emission and
5  5 by 5
Building control
Transmission
Boundaries
Building Heat Transfer
Occupancy by Infiltration Distribution
6  6 6
and Operating and and control
Conditions Ventilation
Aggregation of
Energy
Internal Storage and
7 Services and  7 7
Heat Gains control
Energy
Carriers
Building Solar
8  8 8 Generation
Partitioning Heat Gains
Combustion
8–1
boilers
15316– 15316–
8–2 Heat pumps
4-2 4-2
Thermal solar
8–3
Photovoltaics
On-site
8–4
cogeneration
District heating
8–5
and cooling
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidificatio
n
Dehumidifica
tion
Domestic Hot
water
Lighting
Building
automation
Electricity
production
Building
Overarching Technical Building Systems
(as such)
sub M1 sub M2 sub  M3 M4 M5 M6 M7 M8 M9 M10 M11

8–7 Wind turbines
Radiant
8–8
heating, stoves
Building Load
Calculated
Dynamics dispatching
9 Energy  9 9
(thermal and operating
Performance
mass) conditions
Measured
Measured Measured
10 Energy 10 Energy 10 Energy
Performance Performance
Performance
11 Inspection 11 Inspection 11 Inspection

Ways to
Express
12 12 – 12 BMS
Indoor
Comfort
External
13 Environment
Conditions
Economic
Calculation
NOTE The shaded modules are not applicable.

2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
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 ISO 7345:2018, Thermal performance of buildings and building components — Physical quantities and
definitions (ISO 7345:2018)
EN ISO 52000-1:2017, Energy performance of buildings — Overarching EPB assessment — Part 1: General
framework and procedures (ISO 52000-1:2017)
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidificatio
n
Dehumidifica
tion
Domestic Hot
water
Lighting
Building
automation
Electricity
production
Additional references are identified by the EPB module code number and are specified in Annex B, Table
B.1 (informative default references) according to the template given in Annex A, Table A.1 (normative
template with list of required references).
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 7345:2018,
EN ISO 52000-1:2017 and the following definitions apply.
3.1
heat pump
appliance which takes up heat at a certain temperature and releases heat at a higher temperature
Note 1 to entry: When operated to provide heat (e.g., for space heating or water heating), the appliance is said to
operate in the heating mode; when operated to remove heat (for example, for space cooling), it is said to operate in
the cooling mode.
3.2
electrically driven heat pump
vapour compression cycle heat pump, which incorporate a compressor that is driven by an electric motor
3.3
gas absorption heat pump
heat pump working with a thermodynamic cycle that uses ammonia as a refrigerant and water as
absorber, powered through a combustion direct flame
3.4
combustion engine heat pump
compressed vapour heat pump driven by a combustion engine
3.5
heat transfer medium
any medium (water, air, etc.) used for the transfer of heat within the system and from the system to the
serviced area, that can be:
— the fluid cooled by the evaporator;
— the fluid heated by the condenser
Note 1 to entry: Expressed in °C.
3.6
operating range
range indicated by the manufacturer and limited by the upper and lower limits of use (e.g. temperatures,
air humidity, voltage) within which the unit is deemed to be fit for use and has the characteristics
published by the manufacturer
3.7
heat output
heat produced by the heat pump system to cover the energy requirement of the distribution subsystem
and the generation subsystem heat losses for space heating and/or domestic hot water
Note 1 to entry: heat output is an energy, heat power output is the corresponding power
Note 2 to entry: heat power output is the same as heat capacity
3.8
heat power output
heat flow rate given off by the unit to the heat transfer medium per unit of time for heating or domestic
hot water or a combination of these
Note 1 to entry: If heat is removed from the indoor heat exchanger for defrosting, it is taken into account.
3.9
part load operation
operation state of the heat pump where the actual required heat power output (applied load) is less than
the maximum power output of the device
3.10
part load ratio
ratio between the generated heat during the calculation period and the maximum possible output from
the heat generator during the hourly calculation period or bin temperature
Note 1 to entry: modified definition from EN 14825
Note 2 to entry: this is not an information about the actual operation of the heat pump in the calculation interval.
This is an information about test conditions of product technical data declared according to EN 14825.
3.11
load ratio
ratio of the actual heat power output divided by the maximum power output of the heat pump at the same
source and sink temperature conditions
3.12
intermittency ratio
when cycling ON-OFF, ratio of ON time t to total time available for operation t .
ON pi
Note 1 to entry: For a modulating heat pump, the intermittency ratio IR is 1,0 when the required heat output is
greater than or equal to the minimum continuous operation power output of the heat pump.
Note 2 to entry: For an ON-OFF heat pump, the intermittency ratio IR is equal to the load ratio LR.
Note 3 to entry: This is the same as the capacity ratio (CR) defined in EN 14825.
3.13
alternate operation
production of heat energy for the space heating and domestic hot water system by a heat generator with
combined service by switching the heat generator either to the domestic hot water operation or the space
heating operation
3.14
auxiliary energy
electrical energy used by technical building systems for heating, cooling, ventilation and/or domestic
water to support energy transformation and transport to satisfy energy needs
Note 1 to entry: This includes energy for fans, pumps, electronics, etc. Electrical energy input to a ventilation
system for air transport and heat recovery is not considered as auxiliary energy, but as energy use for ventilation.
Note 2 to entry: The driving energy input for electrically driven heat pumps in the system boundary of the COP
and an electrical back-up heater is not entitled auxiliary energy.
3.15
external auxiliary energy
auxiliary energy used by the heat pump which is not accounted for in the testing of the COP
3.16
internal auxiliary energy
auxiliary energy used by the heat pump which is already accounted for in the testing of the COP
3.17
primary pump
pump mounted in the circuit containing the generator and hydraulic decoupling, e.g. a heating buffer
storage in parallel configuration or a hydronic distributor
3.18
back-up heater
heater to supply heat not covered by the heat pump system itself
Note 1 to entry: If the back-up heater is an electrical heater, the system is calculated according to this standard,
if it is external system, this standard gives the demand of missing heat not supplied by the heat pump as output data.
3.19
coefficient of performance
ratio of the heat power output to the effective power input of the unit
3.20
bivalent temperature
lowest outdoor temperature point at which the unit is declared to have a capacity able to meet 100 % of
the heating load without supplementary heater, whether it is integrated in the unit or not
Note 1 to entry: Below this point, the unit may still provide capacity, but additional supplementary heating is
necessary to fulfil the full heating load.
Note 2 to entry: Bivalent temperature does not apply to units.
Note 3 to entry: This is the definition used to
3.21
operation limit temperature
outdoor temperature below which the declared capacity is equal to zero
3.22
off mode
mode wherein the unit is completely switched off and cannot be reactivated by control device, external
signal or by a timer
Note 1 to entry: Off mode means a condition in which the equipment is connected to the mains and is not
providing any function. The following will also be considered as off mode: conditions providing only an indication
of off mode condition; conditions providing only functionalities intended to ensure electromagnetic compatibility.
3.23
stand-by mode (thermostat off mode)
mode wherein the unit is switched off partially and can be reactivated by a control device (such as a
remote control), an external signal or a timer
Note 1 to entry: The unit is connected to the mains, depends on signal input to work as intended and provides
only the following functions, which may persist for an indefinite time: reactivation function, or reactivation function
and only an indication of enabled reactivation function, and/or information or status display.
3.24
crank-case heating mode
mode wherein the unit is switched off partially and can be reactivated by a control device (such as a
remote control), an external signal or a timer, taking into account energy for crankcase heating
Note 1 to entry: The unit is connected to the mains, depends on signal input to work as intended and provides
only the following functions, which may persist for an indefinite time: reactivation function, or reactivation function
and only an indication of enabled reactivation function, and/or information or status display.
4 Symbols and abbreviations
4.1 Symbols
For the purposes of this document, the symbols given in EN ISO 52000-1, and the specific terms listed in
Table 3 apply.
Table 3 — Symbols
Symbol Units Description
COP - Coefficient of performance
CR - Capacity ratio
IR - Intermittency ratio
LR - Load ratio
ΔT K Temperature difference
4.2 Subscripts
For the purposes of this document, the subscripts given in EN ISO 52000-1, and the specific subscripts
listed in Table 4 apply.
Table 4 — Subscripts
ci calculation duct duct ONOF ON-OFF operation
interval i
mi month i e external, outdoors, opt optimal
evaporator
pi priority i elec electric p pressure
i generic index em emitter Pn at nominal power
j generic index eq equivalent rec recovery
0 at zero output exer exergetic ref reference
add additional ext external req required
air air gdx direct expansion sby stand-by
ground heat
exchanger
avl available ghor horizontal ground snk sink
heat exchanger
base base gver vertical ground heat src source
exchanger
biv bivalent gw ground water sw surface water
bu back-up hp heat pump TOL operating limit
buildinrelated to i internal, indoor type type
g reference building
c condenser inc increase unit unit
ckh crankcase heating inv inverter w water
comp compressor LR related to load ratio x anything
cont continuous LR100 at full load X related to point X
cont continuous map map ηex related to exergetic
operation efficiency
COP COP max maximum θe (related to) external
temperature
cw condenser to min minimum
water
d degradation net net
5 Description of the methods
5.1 Output of the method
The method described in this module covers the calculation of:
— energy input, E ;
X;gen;in
— auxiliary energy input, W ;
X;gen;in
— energy taken from the source, Q ;
X;src;in
— integrated back-up heater energy input E ;
X;bu;in
— actual heat output, Q ;
X;gen;out
— recoverable losses, Q ;
X;gen;ls;rbl
and the indication of:
— main energy carrier for the heat pump, HP_FUEL;
— energy carrier for the integrated back-up heater, HP_BU_FUEL;
— energy carrier for the source, SRC_ENE;
— location of recoverable losses,
of a heat pump for space heating and/or domestic hot water production.
This method is intended to be used for hourly calculation intervals.
5.2 Alternative methods
There is no alternative method.
The calculation path depends on the type of source, sink, heat pump technology and the available data.
The actual calculation path for each specific calculation case is specified according to the identifiers of
source type, sink type and heat pump technology.
5.3 Multiple heat generators
Heat pumps systems can be independent or used as part of a system including other generators (e.g.
boilers). Handling priorities and load distribution among several generators is a task of module M3-1 and
M8-1. This module allows to take into account an integrated back-up heater.
5.4 Multiple services within a calculation interval
Heat pump performance is strongly dependent on operating conditions.
This standard handles a separate operation mode according to the services required and the selected
control strategy (e.g. operate at full load / part load depending on priority).
Simultaneous generation of heat for several services (such as simultaneous heating and cooling or space
heating and domestic hot water preparation) is not covered by this document.
5.5 System boundary
The system boundary defines the components of the entire heating systems that are considered in this
module.
For the heat pump generation subsystem, the system boundary comprises:
— the heat pump;
— the system to extract heat from the source;
— the attached electrical or fuel back-up heaters.
Auxiliary components connected to the generation subsystem are considered, as long as no pumping
(hydraulic) energy is transferred to the distribution subsystem.
5.6 Auxiliary energy
Auxiliary energy is energy needed to operate devices such as e.g. the source pump or the control system
of the generator.
For electrically driven heat pumps thermal capacity and COP in this document are calculated on the basis
of results from product testing, according to the EN 14511 series or EN 14825 which include part of the
required auxiliaries. The part of the auxiliary energy which is counted in the declared COP is called
“internal auxiliary” and it shall not be double counted. Only the auxiliary energy not included in the test
results, and not included in the COP, which is called “external auxiliary” (e.g. the power to overcome the
external pressure drop and the power in stand-by operation), shall be considered in W .
X;gen;aux
For combustion-engine driven heat pump, th
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