EN 12977-2:2018

Thermal solar systems and components - Custom built systems - Part 2: Test methods for solar water heaters and combisystems

This European Standard applies to small and large custom built solar heating systems with liquid heat transfer medium for residential buildings and similar applications, and gives test methods for verification of the requirements specified in EN 12977-1.
This document also includes a method for thermal performance characterization and system performance prediction of small custom built systems by means of component testing and system simulation.
Furthermore, this document contains methods for thermal performance characterization and system performance prediction of large custom built systems.
This document applies to the following types of small custom built solar heating systems:
- systems for domestic hot water preparation only;
- systems for space heating only;
- systems for domestic hot water preparation and space heating;
- others (e.g. including cooling).
This document applies to large custom built solar heating systems, primarily to solar preheat systems, with one or more storage vessels, heat exchangers, piping and automatic controls and with collector array(s) with forced circulation of fluid in the collector loop.
This document does not apply to
- systems with a store medium other than water (e.g. phase- change materials),
- thermosiphon systems,
- integral collector-storage (ICS) systems.

Thermische Solaranlagen und ihre Bauteile - Kundenspezifisch gefertigte Anlagen - Teil 2: Prüfverfahren für Solaranlagen zur Trinkwassererwärmung und solare Kombianlagen

Diese Europäische Norm gilt für kleine und große kundenspezifisch gefertigte thermische Solaranlagen mit flüssigem Wärmeträgermedium, die für den Einsatz in Wohnbauten und ähnliche Anwendungsfälle vorgesehen sind, und gibt Prüfverfahren für die Verifizierung der Erfüllung der in EN 12977-1:2018 festgelegten Anforderungen an.
Dieses Dokument enthält auch ein Verfahren für die Charakterisierung der Wärmeleistung und die Vorhersage der zu erwartenden Anlagenleistung kleiner kundenspezifisch gefertigter Anlagen durch Bauteilprüfung und Anlagensimulation.
Darüber hinaus enthält dieses Dokument Verfahren für die Charakterisierung der Wärmeleistung und die Vorhersage der zu erwartenden Anlagenleistung großer kundenspezifisch gefertigter Anlagen.
Dieses Dokument gilt für die folgenden Typen kleiner kundenspezifisch gefertigter thermischer Solaranlagen:
 ausschließlich für die häusliche Trinkwassererwärmung verwendete Anlagen;
 ausschließlich für die Raumheizung verwendete Anlagen;
 für häusliche Trinkwassererwärmung und Raumheizung verwendete Anlagen;
 sonstige Anlagen (z. B. einschließlich Kühlung).
Dieses Dokument gilt für große kundenspezifisch gefertigte thermische Solaranlagen, hauptsächlich für solare Vorwärmanlagen mit einem oder mehreren Speichern, Wärmeübertragern, Rohrleitungen und automatischen Reglern und einer oder mehreren Kollektorgruppen mit erzwungener Umwälzung des Fluids im Kollektorkreislauf.
Dieses Dokument gilt nicht für
 Anlagen, die ein anderes Speichermedium als Wasser verwenden (z. B. Phasenwechselmaterial),
 Thermosiphon-Anlagen,
 integrierte Kollektor-Speicher(ICS)-Anlagen.

Installations solaires thermiques et leurs composants - Installations assemblées à façon - Partie 2 : Méthodes d'essai pour chauffe-eau solaires et installations solaires combinées

La présente Norme européenne s’applique aux petites et grandes installations de chauffage solaire assemblées à façon, à liquide caloporteur, utilisées dans les bâtiments résidentiels et applications similaires, et il présente des méthodes d’essai permettant de vérifier les exigences spécifiées dans l’EN 12977-1:2018.
Le présent document comprend également une méthode de caractérisation des performances thermiques et de prévision des performances des petites installations assemblées à façon à l’aide d’essais des composants et de simulation de l’installation.
Par ailleurs, le présent document contient des méthodes pour la caractérisation des performances thermiques et la prévision des performances des grandes installations assemblées à façon.
Le présent document s’applique aux types suivants de petites installations de chauffage solaire assemblées à façon :
— installations pour la production d’eau chaude sanitaire exclusivement ;
— installations pour le chauffage des locaux uniquement ;
— installations pour la production d’eau chaude sanitaire et le chauffage des locaux ;
— autres (par exemple, y compris le refroidissement).
Le présent document s’applique aux grandes installations de chauffage solaire assemblées à façon, principalement aux installations à préchauffage, munies d’une ou de plusieurs cuves de stockage, échangeurs de chaleur, canalisations et dispositifs de régulation automatique, et d’un ou de plusieurs champs de capteurs à circulation forcée de fluide dans la boucle de captage.
Le présent document ne s’applique pas aux :
— installations ayant un autre milieu de stockage que l’eau (par exemple, matériaux à changement de phase) ;
— installations à thermosiphon ;
— installations à capteurs autostockeurs (ICS).

Toplotni sončni sistemi in sestavni deli - Neserijsko izdelani sistemi - 2. del: Preskusne metode za sončne grelnike vode in kombinirane sisteme

Ta evropski standard se uporablja za majhne in velike neserijsko izdelane sončne ogrevalne sisteme s tekočim sredstvom za prenos toplote za stanovanjske zgradbe in podobne uporabe ter določa preskusne metode za preverjanje zahtev iz standarda EN 12977-1.
Dokument vsebuje tudi metodo za opredelitev toplotne učinkovitosti in predvidevanje sistemske učinkovitosti majhnih neserijsko izdelanih sistemov s pomočjo preskušanja sestavnih delov in simulacije sistema.
Poleg tega dokument vsebuje metode za opredelitev toplotne učinkovitosti in predvidevanje sistemske učinkovitosti velikih neserijsko izdelanih sistemov.
Ta dokument se uporablja za naslednje vrste majhnih neserijsko izdelanih sončnih ogrevalnih sistemov:
– sistemi, namenjeni izključno pripravi tople vode v gospodinjstvih;
– sistemi, namenjeni izključno segrevanju prostorov;
– sistemi, namenjeni pripravi tople vode v gospodinjstvih in segrevanju prostorov;
– drugi sistemi (npr. vključno s hlajenjem).
Ta dokument se uporablja za velike neserijsko izdelane sončne ogrevalne sisteme, predvsem za sončne predogrevalne sisteme, z eno ali več posodami za shranjevanje, toplotnimi prenosniki, ocevjem in samodejnim krmiljenjem ter kolektorskimi polji s prisilnim kroženjem tekočine v zanki kolektorja.
Ta dokument se ne uporablja za:
– sisteme, ki kot sredstvo shranjevanja uporabljajo druga sredstva namesto vode (npr. fazno spremenljive materiale);
– termosifonske sisteme;
– sisteme integralnega kolektorskega shranjevanja (ICS).

General Information

• Status: Published
• Publication Date: 03-Apr-2018
• Withdrawal Date: 30-Oct-2018
• ICS: 27.160 - Solar energy engineering
• ICS: 91.140.10 - Central heating systems
• ICS: 91.140.65 - Water heating equipment
• Technical Committee: CEN/TC 312 - Thermal solar systems and components
• Drafting Committee: CEN/TC 312/WG 3 - Thermal solar systems and components; Custom built systems
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 24-Oct-2024
• Completion Date: 14-Apr-2025
• 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: 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/495 - Standardisation mandate to CEN, CENELEC and ETSI under Directive 2009/125/EC relating to harmonised standards in the field of Ecodesign
• 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: SIST EN 12977-2:2018 - Thermal solar systems and components - Custom built systems - Part 2: Test methods for solar water heaters and combisystems

Relations

• Replaces: EN 12977-2:2012 - Thermal solar systems and components - Custom built systems - Part 2: Test methods for solar water heaters and combisystems
• Effective Date: 11-Apr-2018

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Thermische Solaranlagen und ihre Bauteile - Kundenspezifisch gefertigte Anlagen - Teil 2: Prüfverfahren für solar betriebene Warmwasserbereiter und solare KombianlagenInstallations solaires thermiques et leurs composants - Installations assemblées à façon - Partie 2 : Méthodes d'essai pour chauffe-eau solaires et installations solaires combinéesThermal solar systems and components - Custom built systems - Part 2: Test methods for solar water heaters and combisystems91.140.65Oprema za ogrevanje vodeWater heating equipment91.140.10Sistemi centralnega ogrevanjaCentral heating systems27.160Solar energy engineeringICS:Ta slovenski standard je istoveten z:EN 12977-2:2018SIST EN 12977-2:2018en,fr,de01-september-2018SIST EN 12977-2:2018SLOVENSKI
STANDARDSIST EN 12977-2:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12977-2
April
t r s z ICS
t yä s x râ
{ sä s v rä s râ
{ sä s v rä x w Supersedes EN
s t { y yæ tã t r s tEnglish Version
Thermal solar systems and components æ Custom built systems æ Part
tã Test methods for solar water heaters and combisystems Installations solaires thermiques et leurs composants æInstallations assemblées à façon æ Partie
t ã Méthodes d 5essai pour chauffeæeau solaires et installations solaires combinées
Thermische Solaranlagen und ihre Bauteile æ Kundenspezifisch gefertigte Anlagen æ Teil
tã Prüfverfahren für Solaranlagen zur Trinkwassererwärmung und solare Kombianlagen This European Standard was approved by CEN on
t { October
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:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t { y yæ tã t r s z ESIST EN 12977-2:2018

Reference conditions for performance prediction . 26 Annex B (normative)
Additional information regarding the calculation of the fractional energy savings . 35 Annex C (informative)
Short-term system testing . 37 Annex D (informative)
Long-term monitoring . 49 Annex E (informative)
Determination of water wastage . 51 Annex F (informative)
Implementation for Ecodesign and Energy Labelling . 52 Annex ZA (informative)
Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EC) No 811/2013 aimed to be covered . 53 Annex ZB (informative)
Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EC) No 812/2013 aimed to be covered . 54 Annex ZC (informative)
Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EC) No 814/2013 aimed to be covered . 55 Bibliography . 56
Ds shift term for the calculation of mains water temperature at reference location
fsav fractional energy savings % SIST EN 12977-2:2018

Paux auxiliary power W Prc circulation heat loss power W Qaux gross auxiliary energy demand of the solar heating system MJ Qaux,net net auxiliary energy demand of the solar heating system delivered by the auxiliary heater to the store or directly to the heat distribution system MJ Qconv gross energy demand of the conventional heating system MJ Qconv,net net energy demand of the conventional heating system MJ Qd heat demand MJ Qd,hw heat demand for domestic hot water preparation MJ Qd,sh heat demand for space heating MJ QL energy delivered at the outlet of the solar heating system MJ Ql store heat losses of the solar heating system MJ Ql,a store heat losses of the store heated by auxiliary energy (in case of a two-store-solar-plus-supplementary system) MJ Ql,s store heat losses of the store heated by solar energy (in case of a two-store-solar-plus-supplementary system) MJ Ql,conv store heat losses of the conventional heating system MJ Qohp heat diverted from the store as active overheating protection, if any MJ Qpar parasitic energy (electricity) for the collector loop pump(s) and control unit MJ Qsav energy savings due to the solar heating system MJ Qsol energy delivered by the collector loop to the store MJ T* reduced temperature difference; T* = (Ím – Ía)/Gh m2 × K/W (UA)hx heat transfer capacity rate of a heat exchanger W/K (UA)S heat loss capacity rate of the store of the solar heating system W/K SIST EN 12977-2:2018

W/K UL overall heat loss coefficient of a collector or collector array W/(m2 × K) cV volume flow rate in collector loop l/h Vd demanded (daily) load volume l/d rcV volume flow rate in circulation loop l/h sV volume draw-off flow rate from storage l/h VS,conv store volume of the conventional heating system l v surrounding air speed m/s Í average temperature difference induced by a heat exchanger K Íamplit average amplitude of seasonal mains water temperature variations on reference location K
drop in system efficiency induced by a heat exchanger % Ía collector ambient or surrounding air temperature °C Íaverage yearly average mains water temperature on reference location °C Íci/co collector or collector array inlet/outlet fluid temperature °C Ícw mains water temperature °C Íd desired hot water temperature °C Ím mean collector fluid temperature; Ím = (Íci + Íco)/2 °C Írce fluid temperature at circulation loop outlet °C Írci fluid temperature at circulation loop inlet °C ÍS storage draw-off temperature °C ÍS,amb store ambient air temperature °C Ístart/stop temperature for which controller operation starts/stops °C Ístore temperature of the hot water store °C 0 zero-loss collector efficiency (efficiency at T* = 0)
aux overall generation efficiency of the auxiliary heater of the solar heating system
conv overall generation efficiency of the heater of the conventional heating system
Íreq required temperature for sensor high-temperature resistance °C SIST EN 12977-2:2018

induced by a heat exchanger in the collector loop of a small custom built system should be estimated by Formula (1): ()01100%chxAaUAηη∆=×=(1)=For=small=systems,=(UA)hx is delivered by the store performance test of EN 12977-3:2018 or EN 12977-4:2018 ((UA)hx to be chosen for store temperatures of 20 °C, an average temperature difference of 10 K and a flow rate similar to the one used for the determination of the collector parameters). For large systems, (UA)hx is taken from the heat exchanger performance data sheet provided by the manufacturer. NOTE
In the latter case, since performance data of external heat exchangers (which are mostly used in large custom built systems) are generally quite reliable, no additional measurements are needed. For heat exchangers in other loops (e.g. a load side heat exchanger), the average temperature difference Í which is induced by the presence of the heat exchanger should be estimated by calculation. The drop in efficiency may then be estimated by Formula (2): ()1/100%refaGηϑ∆=∆×=(2)=where=the=reference=solar=irradiance=Gref is set to 1 000 W/m2. More accurate calculation methods are given in [1]. In special cases, the thermal stratification in the store should be taken into account, to obtain an accurate figure for the efficiency drop. 6.4.7 Store For small custom built systems only: — the performance of their stores should be tested according to EN 12977-3:2018, in the case of a solar water heater, or EN 12977-4:2018, in the case of a solar combisystem; — the heat loss capacity rate of these hot water stores, obtained from performance tests according to EN 12977-3:2018 and EN 12977-4:2018, respectively, should be compared with the requirements given in EN 12977-1:2018, 6.4.7. 6.4.8 Pipework Check the design plan and system documentation in respect of design and material of pipes and fittings. For the pipework in the collector loop, check its compliance with ISO/TR 10217. 6.4.9 Thermal insulation Check the design plans and system documentation. 6.4.10 Control equipment See EN 12977-5:2018. SIST EN 12977-2:2018
...