Heating boilers - Energy assessment of hot water storage tanks

This document specifies a method for the energy assessment of domestic/sanitary hot water storage tanks of up to 2 000 l.
Whilst this document does not cover water heaters intended primarily for direct heating, it does allow the provision of electric heating elements for auxiliary use.
Primary heating buffer tanks are not covered by this document. Heat losses of domestic hot water storage tanks integrated into combi boilers marketed as a single unit are not covered by this document.

Heizkessel - Energetische Bewertung von Warmwasserspeichern

Dieses Dokument legt ein Verfahren für die energetische Bewertung von Trink-/Sanitärwarmwasser-Speichersystemen mit einer Speichergröße von bis zu 2 000 l fest.
Obgleich dieses Dokument keine Wasserheizkessel behandelt, die in erster Linie für die unmittelbare Beheizung vorgesehen sind, erlaubt es, elektrische Heizelemente für zusätzliche Nutzungen vorzusehen.
Primäre Heizpufferspeicher werden in diesem Dokument nicht behandelt. Wärmeverluste von Speichern von Trinkwassererwärmungssystemen, die in Kombi-Boilern integriert sind, werden in diesem Dokument nicht behandelt.

Chaudières de chauffage - Évaluation énergétique des ballons d'eau chaude

Le présent document spécifie une méthode d'évaluation de la performance énergétique des ballons d'eau chaude sanitaire d'une capacité maximale de 2 000 l.
Bien que le présent document ne couvre pas les chauffe-eaux essentiellement conçus pour le chauffage direct, les résistances électriques sont admises pour une utilisation auxiliaire.
Les ballons tampons de pré-chauffage ne sont pas couverts par le présent document. Les pertes de chaleur des ballons d'eau chaude sanitaire intégrés dans des chaudières à deux services commercialisées sous la forme d'un ensemble ne sont pas couvertes par le présent document.

Kotli za gretje - Energijsko ocenjevanje hranilnikov tople vode

Ta evropski standard določa metodo za energetsko oceno nezračenih (zaprtih) hranilnikov tople vode s prostornino do 1500 l, namenjenih za opremljanje z zunanjim virom toplote in za proizvodnjo tople vode v gospodinjstvu. Ta evropski standard ne zajema grelnikov vode, ki so namenjeni predvsem za neposredno ogrevanje, vendar dovoljuje uporabo dodatnih električnih grelnih elementov.

General Information

Status
Published
Publication Date
22-Oct-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
23-Oct-2019
Completion Date
23-Oct-2019

RELATIONS

Buy Standard

Standard
EN 15332:2020
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 15332:2020
01-januar-2020
Nadomešča:
SIST EN 15332:2008
Kotli za gretje - Energijsko ocenjevanje hranilnikov tople vode
Heating boilers - Energy assessment of hot water storage tanks
Heizkessel - Energetische Bewertung von Warmwasserspeichern

Chaudières de chauffage - Évaluation de la performance énergétique des préparateurs

d'eau chaude
Ta slovenski standard je istoveten z: EN 15332:2019
ICS:
27.015 Energijska učinkovitost. Energy efficiency. Energy
Ohranjanje energije na conservation in general
splošno
27.060.01 Gorilniki in grelniki vode na Burners and boilers in
splošno general
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 15332:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 15332:2020
---------------------- Page: 2 ----------------------
SIST EN 15332:2020
EN 15332
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 91.140.65 Supersedes EN 15332:2007
English Version
Heating boilers - Energy assessment of hot water storage
tanks

Chaudières de chauffage - Évaluation énergétique des Heizkessel - Energetische Bewertung von

ballons d'eau chaude Warmwasserspeichern
This European Standard was approved by CEN on 9 September 2019.

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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15332:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 15332:2020
EN 15332:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Requirements on the test rig ...................................................................................................................... 7

5 Measurements .................................................................................................................................................. 7

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

requirements of Commission Regulation (EC) No [814/2013] aimed to be covered .......... 14

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

requirements of Commission Regulation (EC) No [812/2013] aimed to be covered .......... 15

Bibliography ................................................................................................................................................................. 16

---------------------- Page: 4 ----------------------
SIST EN 15332:2020
EN 15332:2019 (E)
European foreword

This document (EN 15332:2019) has been prepared by Technical Committee CEN/TC 57 “Central

heating boilers”, the secretariat of which is held by DIN.

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 April 2020, and conflicting national standards shall be

withdrawn at the latest by April 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 15332:2007.

EN 15332:2019 includes the following significant technical changes with respect to EN 15332:2007:

— Scope was updated
— Normative references were updated
— Terms and definitions were updated
— Evaluation of energy efficiency was introduced
— The measurement section was made more concise
— Addition of Annex ZA

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 Annexes ZA and ZB, which are an integral part of

this document.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: 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 the

United Kingdom.
---------------------- Page: 5 ----------------------
SIST EN 15332:2020
EN 15332:2019 (E)
1 Scope

This document specifies a method for the energy assessment of domestic/sanitary hot water storage

tanks of up to 2 000 l.

Whilst this document does not cover water heaters intended primarily for direct heating, it does allow

the provision of electric heating elements for auxiliary use.

Primary heating buffer tanks are not covered by this document. Heat losses of domestic hot water

storage tanks integrated into combi boilers marketed as a single unit are not covered by this document.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
indirectly heated un-vented hot water storage tanks
indirectly heated closed hot water storage tanks

storage vessels used for heating up domestic hot water with an external heat source where the hot

water side is not permanently vented to the atmosphere, including all devices delivered with it

3.2
domestic water side
potable water side
side of the storage tank which contains domestic hot water

Note 1 to entry: If a mixing valve is delivered with the storage tank, it is considered to be part of the hot water

side.
3.3
heating side
side of the storage tank which contains the heating medium
3.4
temperature of the cold water
temperature at the inlet of the domestic water side of the storage tank, in °C
3.5
temperature of the warm water
temperature at the outlet of the domestic water side, in °C
---------------------- Page: 6 ----------------------
SIST EN 15332:2020
EN 15332:2019 (E)
3.6
usable hot water temperature
minimum temperature for the hot water to be usable

Note 1 to entry: Minimum temperature for the hot water defined here as difference between the temperature of

the warm water Tw = 40 °C minus the temperature of cold water Tc = 10 °C (Tu = Tw − Tc = 30 K).

3.7
heating medium supply temperature

heating medium temperature at the entrance of the heating side of the water heater

3.8
heating medium return temperature
heating medium temperature at the outlet of the heating side of the water heater
3.9
storage temperature

temperature of the storage tank measured at the thermostat position, which is intended for this

purpose
3.10
ambient temperature
amb

temperature in the environment of the hot water storage tank measured according to 5.3.1

3.11
storage excess temperature

temperature difference between the storage temperature and the ambient temperature:

ΔT = T − T
x sm amb
3.12
tapping volume flow
flow of warm water through the domestic water side, in l/s
3.13
tapping mass flow
flow of warm water through the domestic water side, in kg/h
3.14
loading mass flow
flow of heating medium through the heating side, in kg/h
---------------------- Page: 7 ----------------------
SIST EN 15332:2020
EN 15332:2019 (E)
3.15
rated storage volume
capacity of the storage tank assigned by the manufacturer, in litres

Note 1 to entry: Rated storage volume is the sum of the domestic water side volume, heating water and the

volume in additionally heat exchangers e.g. solar systems.
3.16
actual domestic storage volume

capacity of the domestic water side of specific storage tank used during measurements and determined

by volume measuring or balancing, in litres
Note 1 to entry: The heat exchanger(s) is/are empty.
3.17
hot water volume

quantity of hot water, in litre, at usable temperature T which is tapped during a specifc time from the

charged storage tank
3.18
continuous heat exchanger input

continuous transferable heat power from the heating side to the hot water side, in kW, at standard

conditions of T = 10 °C, T = 60 °C and T = 80 °C
c w h
3.19
standing heat loss

energy loss, in kWh/d, at 65 °C against environment with an ambient temperature of T = 20 °C, but at

amb
least 45 K excess temperature
3.20
cycle time
time interval of the data acquisition, in seconds
3.21
nominal storage temperature
temperature of the stored water in the tank as measured by the thermostat
3.22
primary heating buffer tank
storage tank that is only filled with primary water
3.23
buffer tank

heat store filled with water, in which the contents do not come into contact with the atmosphere and

which can collect energy from various sources, store it, and deliver it at a later point in time

---------------------- Page: 8 ----------------------
SIST EN 15332:2020
EN 15332:2019 (E)
4 Requirements on the test rig
4.1 Environment

The ambient temperature shall be (20 ± 3) °C. The air speed where the ambient temperature is

measured (see Figure 3) shall not exceed 0,25 m/s.
The relative humidity shall be lower than 85 %.
The water heater shall be protected from radiation from the environment.

The cold water temperature T shall be between 8 °C and 18 °C and shall not vary more than ± 1 K

during the test.

If the cold water temperature differs from the given temperature range, the measurement shall take

place with the according temperature differences.
4.2 Measuring accuracy
4.2.1 Temperature

Temperatures shall be measured with a minimum accuracy of ± 1 K. It shall be guaranteed by

appropriate installation of the temperature probes that on the measuring points the medium caloric

temperature of the water is measured. The time constant for the temperature measurement shall not be

larger than 5 s.
4.2.2 Mass and volume flow

The mass and volume flow of the water shall be measured with minimum accuracy of 1 %.

4.2.3 Time
The time shall be measured with a minimum accuracy of ± 1 s.
4.2.4 Electrical energy

Electrical energy shall be measured with a measurement instrument with a range appropriate to the

tank being assessed, the minimum accuracy shall be 1 % or a maximum bandwidth of ± 10 Wh.

4.2.5 Measurement cycle time
The cycle time for the measurement after 5.4 shall not be larger than 10 s.

For all other measurements according to Clause 5 the cycle time should not be larger than 60 s.

4.2.6 Volume

The actual storage volume of the storage tank shall be measured within an accuracy of ± 1 %.

5 Measurements
5.1 General
The delivered storage tank, as produced by the manufacturer, shall be tested.

For storage tanks in a product range which have the same constructional design, the testing of only the

smallest and the largest storage tank shall be sufficient, provided the ratio of the nominal volume of the

smallest to largest storage tank is less than or equal to 2: 1. If, however, within the same product range,

this ratio is larger than 2: 1, then so many intermediate sizes shall be tested so that the ratio of 2: 1 from

the higher volume size to the lower volume size is not exceeded.
---------------------- Page: 9 ----------------------
SIST EN 15332:2020
EN 15332:20
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.