EN 12977-3:2018

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.PThermische Solaranlagen und ihre Bauteile - Kundenspezifisch gefertigte Anlagen - Teil 3: Leistungsprüfung von Warmwasserspeichern für SolaranlagenInstallations solaires thermiques et leurs composants - Installations assemblées à façon - Partie 3 : Méthodes d'essai des performances des dispositifs de stockage des installations de chauffage solaire de l'eauThermal solar systems and components - Custom built systems - Part 3: Performance test methods for solar water heater stores91.140.65Oprema za ogrevanje vodeWater heating equipment91.140.10Sistemi centralnega ogrevanjaCentral heating systems27.160Solar energy engineeringICS:Ta slovenski standard je istoveten z:EN 12977-3:2018SIST EN 12977-3:2018en,fr,de01-september-2018SIST EN 12977-3:2018SLOVENSKI
STANDARDSIST EN 12977-3:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12977-3
April
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{ sä s v rä x w Supersedes EN
s t { y yæ uã t r s tEnglish Version
Thermal solar systems and components æ Custom built systems æ Part
uã Performance test methods for solar water heater stores Installations solaires thermiques et leurs composants æInstallations assemblées à façon æ Partie
u ã Méthodes d 5essai des performances des dispositifs de stockage des installations de chauffage solaire de l 5eau
Thermische Solaranlagen und ihre Bauteile æ Kundenspezifisch gefertigte Anlagen æ Teil
uã Leistungsprüfung von Warmwasserspeichern für Solaranlagen This European Standard was approved by CEN on
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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
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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 uã t r s z ESIST EN 12977-3:2018

Store model benchmark tests . 36 A.1 General . 36 A.2 Temperature of the store during stand-by . 36 A.3 Heat transfer from heat exchanger to store . 36 Annex B (normative)
Verification of store test results . 38 SIST EN 12977-3:2018

Benchmarks for the parameter identification . 47 Annex D (informative)
Requirements for the numerical store model . 48 D.1 General . 48 D.2 Assumptions . 48 D.3 Calculation of energy balance . 48 Annex E (informative)
Determination of hot water comfort . 50 Annex F (informative)
Implementation for Ecodesign and Energy Labelling . 51 F.1 Standing loss . 51 F.2 Nominal store volume . 51 F.3 Volume of the non-solar heat storage . 51 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 . 52 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 . 53 Annex ZC (informative)
Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EC) No 814/2013 aimed to be covered . 54 Bibliography . 55 SIST EN 12977-3:2018

density, in kg/m3 5 Store classification Hot water stores are classified by distinction between different charge and discharge modes. Five groups are defined as shown in Table 1. Table 1 — Classification of the stores Group Charge mode Discharge mode 1 direct direct 2 indirect direct 3 direct indirect 4 indirect indirect 5 stores that cannot be assigned to groups 1 to 4 NOTE All stores can have one or more additional electrical auxiliary heating elements. 6 Laboratory store testing 6.1 Requirements on the testing stand 6.1.1 General The hot water store shall be tested separately from the whole solar system on a store-testing stand. The testing stand configuration shall be determined by the classification of hot water stores as described in Clause 5. An example of a representative hydraulic testing stand configuration is shown in Figure 1 and Figure 2. The circuits are intended to simulate the charge and discharge circuit of the solar system and to provide fluid flow with a constant or well-controlled temperature. The full test stand consists of one charge and one discharge circuit. NOTE 1 If the store consists of more than one charge or discharge devices (e.g. two heat exchangers), then these are tested separately. The testing stand shall be located in an air-conditioned room where the room temperature of 20 °C should not vary more than ± 2 K during the test. Both circuits shall fulfil the following requirements: — the flow rate shall be adjustable and stable within ± 5 %; — the working temperature range shall be between 10 °C and 90 °C; NOTE 2 A typical heating power of the charge circuit is in the range of 15 kW. — the minimum cooling power in the discharge circuit shall be at least 25 kW at a fluid temperature of 20 °C; SIST EN 12977-3:2018

Key FF flow meter HX heat exchanger OP overheating protection P pump ST store (belonging to test facility) SV solenoid valve TT temperature sensor TIC temperature indicator and controller V valve Figure 1 — Charge circuit of the store-testing stand The heating medium water in the charge circuit (see Figure 1) is pumped through the cooler (HX101) and the temperature controlled heaters (TIC106) by the pump (P101). A buffer tank (ST101) is used to balance the remaining control deviations. By means of the bypass (V107) the flow through the store can be controlled, it also ensures a continuously high flow through the heating section and therefore good control characteristics. With the solenoid valve (SV101), the heating medium can bypass the store to prepare a sudden increase of the inlet temperature into the store. The temperature sensors are placed near the inlet (TT101) and outlet (TT102) connections of the store; the connection to the store is established through insulated flexible pipes. The charge circuit can be operated closed, under pressure (design pressure 2,5 bar, membrane pressure expansion tank and pressure relief valve (V109)) as well as open (valve (V108) open) with the store SIST EN 12977-3:2018

Key FF flow meter HX heat exchanger P pump SV solenoid valve TT temperature sensor TIC temperature indicator and controller V valve Figure 2 — Discharge circuit of the store-testing stand SIST EN 12977-3:2018

group 1
group 2
group 3
group 4 6.3.2.2.2 6.3.2.2.3 6.3.2.2.4 6.3.2.2.5 Determination of the thermal stratification during discharge with a 'high' flow rate Test S 6.3.2.3 Determination of the stand-by heat loss capacity rate of the entire store Test L:
group 1
group 2
group 3
group 4 6.3.2.4.2 6.3.2.4.3 6.3.2.4.4 6.3.2.4.5 Determination of the heat transfer capacity rate and the position of the auxiliary heat exchanger(s) Test NiA for stores with auxiliary heat exchanger(s) 6.3.2.5 Determination of the position(s) and length(s) of the electrical heating source(s) Test EiA for stores with electrical heating source(s) 6.3.2.6 Determination of the degradation of thermal stratification during stand-by Test NiA and Test NiB for stores of groups 1 and 3 Test NiA and Test NiB for stores of groups 2 and 4 Test EiA and Test EiB for stores with electrical auxiliary heating sources only 6.3.2.7.2 6.3.2.5 6.3.2.7.3 6.3.2.6 6.3.2.7.4 The exact vertical positions of the upper connections of the heat exchangers above which the store is charged in a mixed way, h
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