Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 7: Specific provisions for hybrid appliances

Scope of EN 12309 series
Appliances covered by EN 12309 include one or a combination of the following:
-  gas-fired sorption chiller;
-  gas-fired sorption chiller/heater;
-  gas-fired sorption heat pump.
EN 12309 applies to appliances only when used for space heating and cooling with or without heat recovery. Appliances can be monovalent, bivalent or hybrid types.
EN 12309 applies to appliances having flue gas systems of type B and C (according to CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 applies to appliances that can be single ducted or double ducted.
EN 12309 only applies to appliances having
-  integral burners under the control of fully automatic burner control systems,
-  closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water or air to be cooled or heated,
-  mechanical means to assist transportation of the combustion air and/or the flue gas.
The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see definitions in prEN 12309 1:2012) and EN 12309 applies to all such functions providing that the function concerned is dependent on circulation of fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s).
NOTE 1   Any appliance function that is not dependent on circulation of the fluid within the absorption, adsorption, or refrigerant circuit(s) should be assessed separately.
EN 12309 is applicable to appliances that are intended to be type tested. Requirements for appliances that are not type tested would need to be subject to further consideration.
In the case of packaged units (consisting of several parts), EN 12309 applies only to those designed and supplied as a complete package.
EN 12309 does not apply to air conditioners.
The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by EN 12309.
Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309.
NOTE 2   All the symbols given in this text should be used regardless of the language used.
Scope of this Part 7 to EN 12309
This part of EN 12309 specifies specific provisions for hybrid appliances for gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW.
This part of EN 12309 deals particularly with the specific provisions of the newly introduced hybrid heating appliances based on gas-driven sorption heat pumps as defined in Part 1 and comprehensively described in 4.1 of this document.

Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW - Teil 7: Spezifische Bestimmungen für Hybridanlagen

1.1   Anwendungsbereich der EN 12309
Geräte nach dieser Europäischen Norm beinhalten eine oder eine Kombination der folgenden Funktionen:
-   gasbefeuertes Sorptionskühlgerät;
-   gasbefeuertes Sorptionskühl-/heizgerät;
-   gasbefeuerte Sorptionswärmepumpe.
Diese Europäische Norm gilt ausschließlich für Geräte für die Raumheizung oder  kühlung mit oder ohne Wärmerück¬gewinnung.
Diese Europäische Norm gilt für Geräte mit Abgassystemen der Bauarten B und C (nach CEN/TR 1749) sowie für Geräte zur Aufstellung im Freien. EN 12309 gilt nicht für Klimaanlagen, sie gilt ausschließlich für Geräte mit:
-   integrierten Brennern, gesteuert mittels Feuerungsautomaten;
-   geschlossenen Kühlkreislaufsystemen, in denen das Kühlmittel nicht direkt mit dem/der zu kühlenden oder zu erwärmenden Wasser/Sole oder Luft in Berührung kommt;
-   mechanischen Einrichtungen zur Unterstützung der Verbrennungsluft- und/oder Abgasabführung.
Die vorstehenden Geräte können eine oder mehrere Primär- oder Sekundärfunktion(en) haben (d. h. Wärme-rückgewinnung — siehe Begriffe nach prEN 12309 1:2012).
Bei (aus mehreren Teilen bestehenden) Verpackungseinheiten gilt diese Europäische Norm nur, wenn diese als vollständige Baugruppe ausgelegt und geliefert werden.
EN 12309 behandelt nicht die Geräte, deren Kondensator mit Luft oder durch Verdampfung von zusätzlichem Wasser auf der Außenseite gekühlt wird.
Anlagen für Heizung und/oder Kühlung industrieller Prozesse fallen nicht in den Anwendungsbereich der EN 12309.
Alle in diesem Text angegebenen Symbole sollten unabhängig von dessen jeweiliger Sprache verwen¬det werden.
1.2   Anwendungsbereich des Teil 7 der EN 12309
Der vorliegende Teil der EN 12309 behandelt insbesondere spezifische Vorschriften für Hybridheizgeräte auf der Grundlage von gasbefeuerten Sorptionswärmepumpen, wie es in Teil 1 definiert ist.
Die von dieser Europäischen Norm abgedeckten Heizgeräte sind Hybridgeräte, eine eingehauste Baueinheit oder eine Baugruppe, die eine direkte oder indirekte befeuerte Sorptionswärmepumpe für die Grundlast und einen Brennwertspitzenlastkessel mit nur einer Abgasanlage, Stromanschluss und Mensch-Maschine-Schnittstelle für den Endbenutzer kombiniert. Die in dieser Norm im Hybridgerät direkt oder indirekt beheizte Sorptionswärmepumpe könnte eine intermittierende oder kontinuierlich arbeitende Ab- oder Adsorptionswärmepumpe sein.
Das Steuersystem der Hybridheizgeräte entscheidet über den Übergang zwischen dem Wärmepumpenbetriebsmodus auf/von dem Mischbetrieb (Heizen mit sowohl Sorptionswärmepumpe sowie dem Spitzenkessel) und dem direkten Heizmodus (nur Spitzenkessel), je nach Temperatur des Wärmeträgers am Eintritt oder Austritt, der Temperatur der Sole, die in den Innenwärmeübertrager (Verdampfer) der Wärmepumpe eintritt, die erforderliche Austritts oder Eintrittstemperatur in Abhängigkeit von der Außentemperatur sowie dem Sollwert der Innenraumtemperatur. Beim Übergang vom Wärmepumpenbetriebsmodus in den Mischbetrieb entscheidet das Steuerungssystem auch über den Mischungsgrad auf der Grundlage der oben erwähnten Parameter.

Appareils à sorption à chauffage direct au gaz pour chauffage et/ou refroidissement d'un débit calorifique sur PCI inférieur à 70 kW - Partie 7: Dispositions spécifiques pour les appareils hybrides

Les appareils concernés par ces normes englobent les appareils suivants isolément ou en combinaison :
-   groupe refroidisseur à sorption fonctionnant au gaz ;
-   groupe refroidisseur réchauffeur à sorption fonctionnant au gaz ;
-   pompe à chaleur à sorption fonctionnant au gaz ;
Ces normes s'appliquent aux appareils utilisés uniquement pour le chauffage et le refroidissement de locaux avec ou sans récupération de chaleur. Les appareils peuvent être des types monovalent, bivalent ou hybride.
Ces normes s'appliquent aux appareils comportant des systèmes d'évacuation des gaz de combustion de type B et C (conformément au CEN/TR 1749) et aux appareils conçus pour les installations extérieures. Ces Normes européennes s'appliquent aux appareils pouvant être à raccord simple ou double.
Ces normes ne s'appliquent qu'aux appareils comportant :
-   des brûleurs intégrés sous le contrôle de systèmes de commande automatique
-   des circuits fermés de fluide frigorigène dans lesquels le fluide frigorigène ne vient pas en contact avec l'eau ou l'air à refroidir ou à chauffer
-   des moyens mécaniques pour l'alimentation en air de combustion et/ou l'évacuation des produits de combustion
Les appareils ci-dessus peuvent avoir une ou plusieurs fonctions principales ou additionnelles (c'est-à-dire récupération de chaleur, voir le paragraphe Définitions) et cette norme s'applique à toutes ces sortes de fonctions pourvu que la fonction considérée dépende de la circulation de fluide (fluide frigorigène et/ou solution) dans le ou les circuits à absorption, à adsorption ou de fluide frigorigène.
NOTE 1   Il convient d'évaluer séparément les appareils dont les fonctions ne dépendent pas de la circulation du fluide dans le ou les circuits à absorption, à adsorption ou de fluide frigorigène.
Ces normes s'appliquent aux appareils destinés à être soumis à des essais de type. Les exigences pour les appareils non destinés à subir des essais de type pourraient appeler des considérations supplémentaires.
Dans le cas des appareils fournis prêts à l'emploi (constitués de plusieurs éléments), la norme ne s'applique qu'à ceux conçus et fournis sous forme d'ensemble complet.
Ces normes ne s'appliquent pas aux climatiseurs.
La présente norme ne couvre pas les appareils ayant leur condenseur refroidi par air et par évaporation d’eau d’un circuit supplémentaire externe.
Ces normes ne s’appliquent pas aux installations utilisées pour le chauffage et/ou le refroidissement des procédés industriels.
NOTE 2   Il convient d’utiliser tous les symboles spécifiés dans le présent document, quelle que soit la langue utilisée.

Absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW - 7. del: Posebne zahteve za hibridne naprave

Področje uporabe standardov EN 12309
Naprave, zajete v standardu EN 12309, vključujejo eno ali več kombinacij naslednjih elementov:
–  absorpcijske in adsorpcijske plinske naprave za hlajenje;
–  absorpcijske in adsorpcijske plinske naprave za hlajenje/gretje;
–  absorpcijske in adsorpcijske plinske toplotne črpalke.
EN 12309 se uporablja za naprave le, če se uporablja za segrevanje in hlajenje prostora z rekuperacijo toplote ali brez nje. Naprave so lahko monovalentne, dvovalentne ali hibridne.
EN 12309 se uporablja za naprave z odpadnimi plini vrste B in C (v skladu s CEN/TR 1749) in naprave, namenjene zunanji namestitvi. EN 12309 se uporablja za naprave, ki lahko imajo eno ali dve cevi.
EN 12309 se uporablja le za naprave z
–  integralnimi gorilniki s popolnoma avtomatskim sistemom kontrole,
–  hladilnimi tokokrogi z zaprtim sistemom, pri katerih hladilno sredstvo ne pride v neposreden stik z vodo ali zrakom, ki se ohlaja ali segreva,
–  mehaničnimi sredstvi za pomoč pri transportu zraka za gorenje in/ali odpadnega plina.
Zgornje naprave lahko imajo eno ali več primarnih ali sekundarnih funkcij (tj. rekuperacija toplote – glej opredelitve iz standarda prEN 12309 1:2012), pri čemer se EN 12309 uporablja za vse take funkcije, pod pogojem, da je zadevna funkcija odvisna od kroženja tekočine (hladilnega sredstva in/ali raztopine) v tokokrogu(-ih) absorpcije, adsorpcije ali hladilne tekočine.
OPOMBA 1 Vsaka funkcija naprave, ki ni odvisna od kroženja tekočine v tokokrogu(-ih) absorpcije, adsorpcije ali hladilne tekočine, naj bi se ocenila ločeno.
EN 12309 se uporablja za vse naprave, za katere naj bi se izvajal tipski preskus. Zahteve za naprave, za katere se ne izvaja tipski preskus, bi bilo treba dodatno proučiti.
Pri pakiranih enotah (sestavljenih iz več kosov) se EN 12309 uporablja samo za tiste, ki so projektirane in dostavljene kot celoten paket.
EN 12309 se ne uporablja za klimatske naprave.
EN 12309 ne zajema naprav, katerih kondenzator se hladi z zrakom in z izhlapevanjem zunanje dodatne vode.
Inštalacije, uporabljene za gretje in/ali hlajenje industrijskih procesov, niso zajete v standardu EN 12309.
OPOMBA 2 Vsi simboli v tem besedilu naj bi se uporabljali ne glede na uporabljen jezik.
Področje uporabe tega 7. dela standarda EN 12309
Ta del standarda EN 12309 določa posebne zahteve za hibridne naprave za absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW.
Ta del standarda EN 12309 obravnava zlasti posebne zahteve za novo uvedene hibridne naprave za gretje na podlagi absorpcijskih in adsorpcijskih plinskih naprav, kot je opredeljeno v 1. delu in obsežno opisano v odstavku 4.1 tega dokumenta.

General Information

Status
Published
Public Enquiry End Date
09-Nov-2012
Publication Date
18-Feb-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Jan-2015
Due Date
02-Apr-2015
Completion Date
19-Feb-2015

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SLOVENSKI STANDARD
SIST EN 12309-7:2015
01-marec-2015
1DGRPHãþD
SIST EN 12309-2:2001
$EVRUSFLMVNHLQDGVRUSFLMVNHSOLQVNHQDSUDYH]DJUHWMHLQDOLKODMHQMH]JUHOQR
UDYHPRþMRGRYNOMXþQRN:GHO3RVHEQH]DKWHYH]DKLEULGQHQDS

Gas-fired sorption appliances for heating and/or cooling with a net heat input not

exceeding 70 kW - Part 7: Specific provisions for hybrid appliances
Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer
Nennwärmebelastung nicht über 70 kW - Teil 7: Spezifische Bestimmungen für
Hybridanlagen

Appareils à sorption à chauffage direct au gaz pour chauffage et/ou refroidissement d'un

débit calorifique sur PCI inférieur à 70 kW - Partie 7: Dispositions spécifiques pour les

appareils hybrides
Ta slovenski standard je istoveten z: EN 12309-7:2014
ICS:
27.080 7RSORWQHþUSDONH Heat pumps
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
SIST EN 12309-7:2015 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 12309-7:2015
---------------------- Page: 2 ----------------------
SIST EN 12309-7:2015
EUROPEAN STANDARD
EN 12309-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2014
ICS 27.080; 91.140.30 Supersedes EN 12309-2:2000
English Version
Gas-fired sorption appliances for heating and/or cooling with a
net heat input not exceeding 70 kW - Part 7: Specific provisions
for hybrid appliances

Appareils à sorption fonctionnant au gaz pour le chauffage Gasbefeuerte Sorptions-Geräte für Heizung und/oder

et/ou le refroidissement de débit calorifique sur PCI inférieur Kühlung mit einer Nennwärmebelastung nicht über 70 kW -

ou égal à 70 kW - Partie 7 : Dispositions spécifiques pour Teil 7: Spezifische Bestimmungen für Hybridanlagen

les appareils hybrides
This European Standard was approved by CEN on 18 October 2014.

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. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12309-7:2014 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 12309-7:2015
EN 12309-7:2014 (E)
Contents Page

Foreword ..............................................................................................................................................................3

1 Scope ......................................................................................................................................................5

1.1 Scope of EN 12309 .................................................................................................................................5

1.2 Scope of this Part 7 of EN 12309 ..........................................................................................................5

2 Normative references ............................................................................................................................6

3 Terms and definitions ...........................................................................................................................6

4 Test conditions ......................................................................................................................................6

4.1 General ....................................................................................................................................................6

4.2 Inlet temperatures of the indoor heat exchanger ...............................................................................8

4.3 Inlet temperatures into the outdoor heat exchanger .........................................................................9

4.3.1 Air to water hybrid heating appliance..................................................................................................9

4.3.2 Ground water sourced hybrid heating appliances .......................................................................... 10

4.3.3 Ground heat sourced hybrid heating appliances ............................................................................ 10

4.3.4 Solar sourced hybrid heating appliances ........................................................................................ 10

5 Calculation of the seasonal performance in the heating mode ..................................................... 11

6 Standard rating conditions of gas driven sorption heat pump based hybrid heating

appliances ........................................................................................................................................... 11

Annex A (informative) Estimation of the heating fluid inlet and outlet temperature into/out of the

indoor heat exchanger ....................................................................................................................... 14

Annex B (informative) Inlet temperature into the outdoor heat exchanger for ground heat

sourced sorption heat pump based hybrid heating appliances .................................................... 15

Annex C (informative) Inlet temperature into the outdoor heat exchanger for solar sourced

sorption heat pump based hybrid heating appliances ................................................................... 17

Annex D (informative) Inlet temperature of the outdoor heat exchanger for solar collector

assisted sorption heat pump based hybrid heating appliances .................................................... 18

D.1 Introduction ......................................................................................................................................... 18

D.2 Solar-assisted ground sourced gas-driven sorption heat pumps ................................................. 18

D.3 Solar-assisted air sourced gas-driven sorption heat pumps ......................................................... 18

Annex E (informative) Calculation of the seasonal gas utilization efficiency with partial heat

demand coverage by the applied solar collectors .......................................................................... 19

Annex F (informative) Estimation of the seasonal performance of hybrid heating appliances at

building design loads deviating from the appliance's nominal heating capacity ........................ 20

Annex G (normative) Calculation of the seasonal space heating energy efficiency for hybrid gas-

driven sorption heat pump based heating appliances ................................................................... 21

Annex ZA (informative) Relationship between this European Standard and the requirements of

Commission Regulation (EC) No 813/2013 ...................................................................................... 24

Annex ZB (informative) Relationship between this European Standard and the requirements of

Commission Regulation (EC) No 811/2013 ...................................................................................... 25

Bibliography ..................................................................................................................................................... 26

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SIST EN 12309-7:2015
EN 12309-7:2014 (E)
Foreword

This document (EN 12309-7:2014) has been prepared by Technical Committee CEN/TC 299 “Gas-fired

sorption appliances, indirect fired sorption appliances, gas-fired endothermic engine heat pumps and domestic

gas-fired washing and drying appliances”, the secretariat of which is held by UNI.

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 June 2015, and conflicting national standards shall be withdrawn at

the latest by June 2015.
This document supersede EN 12309-2:2000.

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

European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA and Annex ZB, which are integral parts of this

document.

This standard comprises the following parts under the general title, Gas-fired sorption appliances for heating

and/or cooling with a net heat input not exceeding 70 kW:
— Part 1: Terms and definitions;
— Part 2: Safety;
— Part 3: Test conditions;
— Part 4: Test methods;
— Part 5: Requirements;
— Part 6: Calculation of seasonal performances;
— Part 7: Specific provisions for hybrid appliances;
— Part 8: Environmental aspects.

EN 12309-1 and EN 12309-2 supersede EN 12309-1:1999, whereas EN 12309-1, EN 12309-3, EN 12309-4,

EN 12309-5, EN 12309-6, and EN 12309-7 supersede EN 12309-2:2000.

EN 12309-1, EN 12309-2, EN 12309-3, EN 12309-4, EN 12309-5, EN 12309-6, and EN 12309-7 have been

prepared to address the essential requirements of the European Directive 2009/142/EC relating to appliances

burning gaseous fuels (see Annex ZA of prEN 12309-2:2013 for safety aspects and Annex ZA of

EN 12309-5:2014 for rational use of energy aspects).

These documents are linked to the Energy Related Products Directive (2009/125/EC) in terms of tests

conditions, tests methods and seasonal performances calculation methods under Mandate M/495 (see

EN 12309-3:2014, Annex ZA; EN 12309-4:2014, Annex ZA; EN 12309-6:2014, Annex ZA and EN 12309-

7:2014, Annex ZA and prEN 12309-2:2013, Annex ZB and EN 12309-5:2014, Annex ZB).
These documents will be reviewed whenever new mandates could apply.
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SIST EN 12309-7:2015
EN 12309-7:2014 (E)

EN 12309-8 (“Environmental aspects”) deals with the incorporation of the Resolution BT 27/2008 regarding

CEN approach on addressing environmental issues in product and service standards.

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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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SIST EN 12309-7:2015
EN 12309-7:2014 (E)
1 Scope
1.1 Scope of EN 12309

Appliances covered by this European Standard include one or a combination of the following:

— gas-fired sorption chiller;
— gas-fired sorption chiller/heater;
— gas-fired sorption heat pump.

This European Standard applies to appliances designed to be used for space heating or cooling or

refrigeration with or without heat recovery.

This European Standard applies to appliances having flue gas systems of type B and C (according to

CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 does not apply to air

conditioners, it only applies to appliances having:
— integral burners under the control of fully automatic burner control systems,

— closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water

or air to be cooled or heated,

— mechanical means to assist transportation of the combustion air and/or the flue gas.

The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see

definitions in EN 12309-1:2014).

In the case of packaged units (consisting of several parts), this standard applies only to those designed and

supplied as a complete package.

The appliances having their condenser cooled by air and by the evaporation of external additional water are

not covered by EN 12309.

Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309.

All the symbols given in this text should be used regardless of the language used.

1.2 Scope of this Part 7 of EN 12309

This part of EN 12309 deals particularly with the specific provisions of hybrid heating appliances based on

gas-driven sorption heat pumps as defined in Part 1.

The heating appliances covered by this European Standard are of a hybrid type, an encased assembly or

assemblies combining a direct or indirect-fired sorption heat pump for base load and a peak load condensing

boiler with only one flue system, electrical supply cable and human machine interface to the end user. The

direct- or indirect-fired sorption heat pump integrated in the hybrid appliances in this European Standard could

be intermittent or continuously operating ab or adsorption heat pump.

The control system of hybrid heating appliances decides on the transition between the heat pump operation

mode to/from the mixed operation mode (heating by both sorption heat pump as well as the peak boiler) and

the direct heating mode (only peak boiler) depending on the heating fluid inlet or return temperature,

temperature of brine entering the indoor heat exchanger (evaporator) of the heat pump, the required outlet or

supply temperature dependent on the outdoor temperature as well as the target value of the indoor or room

temperature. Upon transition from the heat pump operation mode to the mixed operation mode, the control

system decides also on the degree of mixing based on the above mentioned parameters.

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SIST EN 12309-7:2015
EN 12309-7:2014 (E)
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 12309-1:2014, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding

70 kW ― Part 1: Terms and definitions

prEN 12309-2:2013 , Gas-fired sorption appliances for heating and/or cooling with a net heat input not

exceeding 70 kW ― Part 2: Safety

EN 12309-3:2014, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding

70 kW ― Part 3: Test conditions

EN 12309-4:2014, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding

70 kW ― Part 4: Test methods

EN 12309-6:2014, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding

70 kW ― Part 6: Calculation of seasonal performances
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 12309-1:2014 apply.

4 Test conditions
4.1 General

The types of hybrid heating appliances considered in this European Standard are variable capacity delivering

a variable heating fluid outlet temperature dependent on the outdoor (ambient air) and the design indoor

(room) temperatures as well as the selected heat sink conditions.

Table 1 presents the design temperatures for heating (the dry bulb outdoor coldest temperature) for each

reference heating season, the design indoor (room) temperature (T ) as well as the balance point or heating

limit temperature (T ) for the considered three reference heating seasons (climatic conditions) in

EN 12309-6:2014; namely colder (C), average (A) and warmer (W). The heating season “Average”

corresponds to the weather conditions of Strasburg, while “Warmer” and “Colder” correspond to the weather

conditions of Athens and Helsinki, respectively.

Table 1 — Design temperature, indoor temperature and balance point temperatures for the different

reference heating seasons
Reference Heating Dry bulb temperature conditions
Season
T T T
designh R BP
Colder (C) −22 °C 20 °C 16 °C
Average (A) −10 °C 20 °C 16 °C
Warmer (W) +2 °C 20 °C 16 °C

In Table 2, the design outlet (supply) and inlet (return) temperatures to and from the building heating network

(heating fluid temperatures from the heating appliance to the heating network and backwards, respectively)

are listed as defined in EN 12309-3:2014.
This part of EN 12309 is currently being revised.
---------------------- Page: 8 ----------------------
SIST EN 12309-7:2015
EN 12309-7:2014 (E)

Table 2 — Design outlet and inlet temperatures for the different heat sink conditions

Reference Heat Sink condition Dry bulb temperature conditions
T T
out-d in-d
°C °C
Low temperature application 35 28
Medium temperature application 45 35
High temperature application 55 41
Very high temperature application 65 48

At least one of the given heat sink conditions in Table 2 shall be declared, upon which the seasonal

performance can be evaluated according to this document.

The part load ratio at any outdoor temperature can be defined for the building as the ratio between the

building part load at any outdoor temperature and the building design heat load. In the same way, the heating

appliance part load ratio can be defined as the appliance heating capacity to be delivered at any outdoor

temperature divided by the appliance’s nominal heating capacity.

The accuracy of estimating the seasonal performance of such hybrid appliances is highly dependent on the

uniformity of distributing the reference part load conditions over the building heat demand curve. For hybrid

heating appliances, the reference part load ratios of 100 %, 75 %, 60 %, 45 %, 30 % and 15 % have been

defined.

Because of the applied 1 K step in the outdoor temperature in the EN 12309-6:2014, the estimated part load

ratios deviate from those values. The closest part load value is allocated as a pivot part load ratio for the

estimation of the seasonal performance as given in Table 3.

Table 3 — Reference and pivot part load ratios for the considered reference heating seasons

Reference Reference Pivot PLR for the Reference
test condition PLR Heating Seasons
(C) (A) (W)
A 100 100 100 100
B 75
74 73 71
C 60
61 58 57
D 45
45 46 43
E 30
29 31 29
F 15
16 15 14

If necessary, at most one more reference test point G between two successive reference test points from A to

F may be added. The test conditions should then be linearly interpolated between the two successive

standard reference test conditions given in 4.2 and 4.3.

The stated nominal heating capacity of the hybrid heating appliance shall always be higher than or equal to

the building design load for heating.

NOTE The measured gas utilization efficiencies at the reference part load conditions are only allowed to be

considered in estimating the seasonal performance, if the heating capacity at each reference part load condition is

measured within the given deviation limits in EN 12309–4:2014.
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SIST EN 12309-7:2015
EN 12309-7:2014 (E)
4.2 Inlet temperatures of the indoor heat exchanger

Fixing the reference test conditions to the part load ratios results in the same indoor heat exchanger inlet and

outlet temperatures over the reference heating seasons for every part load ratio. Annex A represents a

detailed approach on how to estimate the inlet and outlet temperature into/from the indoor heat exchanger for

any part load ratio and reference heating season. The inlet and outlet temperatures have been estimated for

the reference test part load ratios defined in 4.1 and presented in Table 4 for both low and medium as well as

in Table 5 for both high and very high temperature heat sink conditions, respectively. Annex A gives a more

detailed view of this approach.

Table 4 — Inlet and outlet temperatures of the indoor heat exchanger for the reference part load test

conditions of the low and medium temperature heat sink applications
Low temperature Medium temperature
application application
Reference
test Outlet Inlet Outlet Inlet
condition temperature temperature temperature temperature
°C °C °C °C
A 35,0 28,0 45,0 35,0
B 31,4 26,2 39,4 31,9
C 29,3 25,1 36,1 30,1
D 27,1 24,0 32,4 28,0
E 24,9 22,8 28,8 25,8
F 22,5 21,5 24,8 23,3

Table 5 — Inlet and outlet temperatures of the indoor heat exchanger for the reference part load test

conditions of the high and very high temperature heat sink applications
High temperature Very high temperature
application application
Reference
test Outlet Inlet Outlet Inlet
condition
temperature temperature temperature temperature
°C °C °C °C
55,0 41,0 65,0 48,0
47,6 37,1 56,0 43,3
43,1 34,7 50,4 40,2
38,2 31,9 44,3 36,7
33,2 29,0 38,0 32,9
27,4 25,4 30,5 28,0

The part load measurements at the reference test conditions shall follow the inlet temperature method of the

EN 12309-4:2014.

Each reference part load test condition is strictly defined by both part load and the inlet temperatures to both

indoor and outdoor heat exchangers. The inlet temperatures to the indoor heat exchangers shall be taken

from Table 4 and Table 5, while the inlet temperatures to the outdoor heat exchanger are defined in 4.3 for the

different environmental heat sources.
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SIST EN 12309-7:2015
EN 12309-7:2014 (E)

The listed outlet temperatures in Table 4 and Table 5 shall be the average outlet temperatures over the cycle.

They are given to guide the measurements only in case the nominal (design) heating fluid flow rate is kept

constant over all part load conditions. Specially, for the low part load ratios (B to F), the heating fluid flow rate

can be decreased to enhance the outlet temperature, in order to increase the measurement accuracy and to

reduce the auxiliary electrical power consumption. This is only allowed under the condition that the

temperature gradient between outlet and inlet temperatures at any part load condition shall not be higher than

the temperature gradient at the corresponding design load condition; namely 7 K for the low temperature heat

sink as well as 10 K, 14 K and 17 K for the medium, high and very high temperature heat sink applications,

respectively.

The recommendations for the hybrid appliance concerning the allowed deviation(s) in the temperature

gradients at each reference part load test condition, as described before, shall be followed.

As the type of integrated gas-driven sorption heat pump can be either intermittent or continuously operating a

time share between the heat pump and the peak boiler is required at higher heating capacities, the heating

capacity should be averaged either over a very long time period (e.g. 24 h) or over a number of complete

operation cycles not less than two. A typical operation cycle of a hybrid appliance can be counted between

two successive normal burner operations.

For burners with constant air to fuel ratio control, a burner calibration shall not be counted as a normal burner

operation. The test shall wait for two successive operation cycles without any automatic burner calibration

operations in between. The cyclic operation of the hybrid appliance shall be described in the operating manual

and the automatic burner calibration mode may be suppressed within a test operation mode, to allow the test

to be carried out more precisely.
4.3 Inlet temperatures into the outdoor heat exchanger
4.3.1 Air to water hybrid heating appliance

Based on the definition of the part load ratio (PLR(Toutdoor)) given in EN 12309-6:2014, the dry bulb air

temperatures entering the outdoor heat exchanger of air to water hybrid heating appliances have been

estimated for the pivot part load test conditions given in Table 3 by applying Formula (1) and are listed in

Table 6.
T =16+ PLR T ⋅ T −16 (1)
( ) ( )
outdoor outdoor designh

Table 6 — Inlet dry (wet) bulb temperatures of air into the outdoor heat exchangers

Reference Heating Season
Reference
test
condition
(C) (A) (W)
A −22 (−23) −10 (−11) 2 (1)
−12 (−13) −3 (−4) 6 (5)
C −7 (−8) 1 (0) 8 (7)
D −1 (−2) 4 (3) 10 (9)
E 5 (4) 8 (7) 12 (11)
F 10 (9) 12 (11) 14 (13)

The wet bulb temperature is set equal to the dry bulb temperature minus 1 K. For temperature below – 10°C,

setting of the wet bulb is not mandatory.
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SIST EN 12309-7:2015
EN 12309-7:2014 (E)

For air to water hybrid heating appliances working with exhaust air as an environmental heat source an inlet

air dry(wet) bulb temperature of 20(12) °C shall be considered for all reference test conditions according to the

EN 12309-3:2014.

If defrosting of the air heat exchanger takes place under any of the specified test conditions of this subclause,

then the defrosting process should be considered in accordance with EN 12309-4:2014.

The installation of the appliance in the climatic chamber shall follow the installation instructions in accordance

with prEN 12309-2:2013 and EN 12309-4:2014.
4.3.2 Ground water sourced hybrid heating appliances

For ground water sourced hybrid heating appliances, all 6 reference test part loads (A to F) shall be measured

with an inlet temperature of 10 °C into the outdoor heat exchanger.
4.3.3 Ground heat sourced hybrid heating appliances

Following the design conditions presented in Annex B, the listed inlet temperatures to the outdoor heat

exchanger in Table 7 at each reference part load test condition shall be applied.

Table 7 — Inlet temperatures to the outdoor heat exchanger (evaporator) for the reference part load

test conditions
PLR Inlet temperature
Reference test
condition
% °C
A 100 5
B 75 5
C 60 6
D 45 7
E 30 8
F 15 9

During the measurements, the stated brine flow rates in the operating manual shall be realized.

4.3.4 Solar sourced hybrid heating appliances

Following Annex C, the brine temperature out of the solar collectors (environmental heat sources) exceeds the

outdoor dry bulb temperature by a temperature difference which is correlated to the collector aperture area

according to Formula (C.1).

The listed temperature differences ( ΔT) in Table 8 shall be added to the reference dry-bulb outdoor

temperatures given in Table 6 depending on the collector aperture area and type to obtain the inlet

temperature into the outdoor heat exchanger (evaporator) for all reference test conditions A-F.

This part of standard is currently being revised
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SIST EN 12309-7:2015
EN 12309-7:2014 (E)

Table 8 — Temperature differences between the inlet temperature to the outdoor heat exchanger and

the outdoor dry-bulb test conditions given in Table 6
Collector aperture ΔT ΔT
area / maximum heat
Flat plate Vacuum tube
extraction rate
m /kW K K
1 2,1 2,9
1,5 2,9 4,1
2 3,6 5,1
3 4,8 6,8
4 5,6 8,0
5 6,3 9,0
6 6,8 9,6

During the measurements, the stated brine flow rates in the operating manual shall be realized.

In case solar collectors are applied as an alternative environmental heat source to assist an existing ground

heat source or an air-brine heat exchanger as an air heat source Annex D could be applied to estimate the

inlet temperature into the outdoor heat exchanger.
5 Calculation of the seasonal performance in the heating mode

The calculation of the seasonal performance of the hybrid heating appliances follows from the application of

the bin method according to the EN 12309-6:2014, 5.3 to 5.7, where the part load gas utilization efficiency and

auxiliary energy factor at each bin temperature are determined via linear interpolation of the their respective

part load values measured at the reference part load test conditions defined in this document for each

reference heating season and heat sink design condition.

The seasonal gas utilization efficiency for sorption heat pump based hybrid heating appliances with partial

coverage of the building heating demand by the solar collectors working as an environmental heat source is to

be estimated according to Annex E.

Annex F presents a methodology to estimate the seasonal performance of hybrid heating appliances at

building heating design loads less than the appliance’s nominal heating capacity.

6 Standard rating conditions of gas driven sorption heat pump based hybrid
heating appliances
For the purposes of marking, comparison or certificati
...

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