SIST EN 17432:2021
(Main)Packaged refrigerating units for walk-in cold rooms - Classification, performance and energy consumption testing
Packaged refrigerating units for walk-in cold rooms - Classification, performance and energy consumption testing
This document defines classification criteria, test conditions and test procedures for performance testing of packaged refrigerating units for stationary cold room applications. This includes ductless units for cold storage applications at medium temperatures (MT) and low temperatures (LT) in either compact or split designs, fitted with electrically driven compressors, which work according to the vapour compression cycle.
Kälteaggregate für begehbare Kühlräume - Klassifikation, Prüfung der Leistung und des Energieverbrauchs
Dieses Dokument legt Klassifizierungskriterien, Prüfbedingungen und Prüfverfahren zur Leistungsprüfung von Kälteaggregaten für die stationäre Anwendung in Kühlräumen fest. Hierzu gehören Kälteaggregate für die Kühllagerung bei mittleren Temperaturen (MT) und niedrigen Temperaturen (LT) sowohl in kompakter als auch Split-Bauweise, die zum freien Ausblasen (der gekühlten Luft) vorgesehen und mit elektrisch angetriebenen Verdichtern ausgerüstet sind und nach dem Kaltdampf-Kompressionsprozess betrieben werden.
Groupes frigorifiques prêts à monter pour chambres froides - Classification, performance et essai de consommation d'énergie
Le présent document définit les critères de classification, les conditions d’essai et les modes opératoires d’essai pour les essais de performances des groupes frigorifiques prêts à monter destinés aux applications dans les chambres froides fixes. Cela inclut les groupes sans conduits pour les applications de stockage à froid à moyennes températures (MT) et basses températures (BT) dans des constructions compactes ou segmentées, équipés de compresseurs à entraînement électrique, qui fonctionnent selon le principe du cycle de compression de vapeur.
Samostojne hladilne enote za male hladilnice - Razvrstitev, tehnične lastnosti in preskus porabe energije
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 17432:2021
01-november-2021
Samostojne hladilne enote za male hladilnice - Razvrstitev, tehnične lastnosti in
preskus porabe energije
Packaged refrigerating units for walk-in cold rooms - Classification, performance and
energy consumption testing
Kälteaggregate für begehbare Kühlräume - Klassifikation, Prüfung der Leistung und des
Energieverbrauchs
Groupes frigorifiques prêts à monter pour chambres froides - Classification, performance
et essai de consommation d'énergie
Ta slovenski standard je istoveten z: EN 17432:2021
ICS:
27.200 Hladilna tehnologija Refrigerating technology
SIST EN 17432:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 17432:2021
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SIST EN 17432:2021
EN 17432
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2021
EUROPÄISCHE NORM
ICS 27.200
English Version
Packaged refrigerating units for walk-in cold rooms -
Classification, performance and energy consumption
testing
Groupes frigorifiques prêts à monter pour chambres Kälteaggregate für begehbare Kühlräume -
froides - Classification, performance et essai de Klassifikation, Prüfung der Leistung und des
consommation d'énergie Energieverbrauchs
This European Standard was approved by CEN on 21 June 2021.
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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17432:2021 E
worldwide for CEN national Members.
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SIST EN 17432:2021
EN 17432:2021 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviated terms . 7
5 Classification . 8
6 Test conditions . 9
6.1 General . 9
6.2 Testing conditions . 9
6.3 Measurement uncertainty . 10
7 Test setup . 11
7.1 General . 11
7.2 Calorimeter room . 11
7.3 Arrangement of test and measurement equipment . 11
7.4 Installation and preparation of a test unit . 12
7.5 Measurement criteria . 12
7.6 Calibration test of the calorimeter room . 13
8 Performance testing . 14
8.1 General . 14
8.2 Steady-state conditions . 14
8.3 Cooling capacity tests . 15
8.3.1 Steady-state conditions . 15
8.3.2 Data acquisition . 15
8.3.3 Heat recovery capacity . 15
8.4 Calculation of the cooling capacity . 15
8.5 Measuring of electric power consumption . 15
8.6 Calculation of EER . 16
9 Test results . 16
10 Test report . 17
10.1 General information . 17
10.2 Additional information . 18
11 Information on the type plate . 18
Annex A (informative) Examples for the test setup . 19
A.1 General . 19
A.2 Examples . 19
Bibliography . 22
2
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SIST EN 17432:2021
EN 17432:2021 (E)
European foreword
This document (EN 17432:2021) has been prepared by Technical Committee CEN/TC 44 “Commercial
and Professional Refrigerating Appliances and Systems, Performance and Energy Consumption”, 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 March 2022, and conflicting national standards shall be
withdrawn at the latest by March 2022.
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 has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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.
3
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SIST EN 17432:2021
EN 17432:2021 (E)
Introduction
This document was developed in order to provide a suitable method of performance testing of packaged
refrigerating units for stationary cold room applications.
This is the first edition of this document. It includes testing only in so-called “dry conditions”. That means,
the evaporator does not show any ice formation during the test. Although it is well-known, that such
conditions do not represent the typical situation in the practical use of the packaged refrigerating units,
this edition of the document focusses on the description of a test procedure providing reliable test results,
which can be used to compare the performance of different models/types of packaged refrigerating unit.
In order to keep the test procedure in this document practically oriented, tests under so-called “wet
conditions” as well as taking defrost periods into account will be a future Work Item of the responsible
working group. The aim is to integrate such tests in a later revision of this document.
This document reflects the current market situation which shows that only refrigerating units without
integrated pump for the heat transfer medium on the exterior heat exchanger are offered.
4
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SIST EN 17432:2021
EN 17432:2021 (E)
1 Scope
This document specifies classification criteria, test conditions and test procedures for performance
testing of packaged refrigerating units for stationary cold room applications. This includes ductless units
for cold storage applications at medium temperatures (MT) and low temperatures (LT) in either compact
or split designs, fitted with electrically driven compressors, which work according to the vapour
compression cycle.
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 https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
packaged refrigerating unit
functional unit incorporating a complete factory-made refrigerating system, mounted in a suitable frame
and/or enclosure, that is fabricated and transported complete, or in two or more sections and in which
no refrigerant-containing parts are connected on site other than by isolation valves, such as companion
valves, and by interconnecting piping as defined by the manufacturer
Note 1 to entry: A packaged refrigerating unit incorporates at least one refrigerant circuit, and can incorporate
one or more heat transfer circuits.
Note 2 to entry: The terms “factory-made” and “refrigerating system” are defined in EN 378-1.
3.2
compact unit
packaged refrigerating unit, that has been assembled, filled ready for use, and is installed without the
need for connecting any refrigerant-containing parts
3.3
split unit
packaged refrigerating unit, comprising one unit providing cooling to the cold room and one unit used
for condensing the refrigerant
3.4
factory made
manufactured at a dedicated production location under control of a recognized quality system
Note 1 to entry: Assembling in this context means manufacturing.
[SOURCE: EN 378-1:2016, 3.8.5, modified — The present Note 1 to entry was added.]
5
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SIST EN 17432:2021
EN 17432:2021 (E)
3.5
interior heat exchanger
heat exchanger in which liquid refrigerant is vaporized by absorbing heat from the interior heat transfer
medium
Note 1 to entry: For the applications regarded here, the interior heat exchanger is usually called “evaporator”.
3.6
exterior heat exchanger
heat exchanger in which the refrigerant is cooled down due to heat dissipation by the exterior heat
transfer medium
Note 1 to entry: For the applications regarded here, the exterior heat exchanger is usually called “condenser”.
3.7
heat transfer medium
medium (water, air, etc.) which transfers heat without undergoing phase changes
3.8
dry bulb temperature
temperature of air measured by a thermometer exposed to the air but shielded from radiation and
moisture
3.9
calorimeter room
insulated enclosure which houses a heating device and the interior heat exchanger
3.10
test chamber
room in which the ambient air can be conditioned and kept in a steady state condition and in which the
exterior heat exchanger as well as the calorimeter room are located
Note 1 to entry: See 7.2 for further explanation.
3.11
cooling capacity
heat per unit of time transferred to the unit via heat transfer medium minus introduced heat of the fans
installed at the interior heat exchanger
3.12
total power consumption
average electrical power consumption of the packaged refrigeration unit, including all electrical supplies
needed for the cooling operation of the unit, over time
3.13
energy efficiency ratio
ratio of cooling capacity to total power consumption of the unit
3.14
operating limits
limitations in terms of maximum and minimum operating conditions (range of pressure, temperature,
voltage, humidity, etc.)
Note 1 to entry: The unit shall work as intended within the operating limits specified by the manufacturer.
6
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SIST EN 17432:2021
EN 17432:2021 (E)
3.15
nominal conditions
conditions that define a standard which reveals if a packaged refrigerating unit is working within those
defined limits
3.16
support cold
independently working refrigerating unit to compensate heat losses through the calorimeter room
envelope
3.17
low temperature
LT
application, at which the packaged refrigerating unit is capable of delivering its nominal cooling capacity
at the interior heat exchanger inlet temperature of −20 °C
3.18
medium temperature
MT
application, at which the packaged refrigerating unit is capable of delivering its nominal cooling capacity
at the interior heat exchanger inlet temperature of 0 °C
4 Symbols and abbreviated terms
Table 1 — Symbols
Unit
Symbol Quantity Unit
Symbol
Q
Cooling capacity Watt W
0
P
Total power consumption Watt W
E
EER Energy efficiency ratio — —
A Length of the air inlet of the interior heat exchanger millimetres mm
Width/height of the air inlet of the interior heat
B millimetres mm
exchanger
q
Heat loss of the calorimeter room Watt per Kelvin W/K
Heat loss
Electric power consumption of the heating device,
all running fans and any other devices being placed
P
Watt W
Heater
inside the calorimeter room which are in use during
calibration of the calorimeter room
T
Internal temperature of the calorimeter room Kelvin K
int
T
Ambient temperature of the test chamber Kelvin K
out
∆T Temperature difference Kelvin K
Temperature of the heat transfer medium at heat
T
Degree Celsius °C
out,w
exchanger outlet
7
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SIST EN 17432:2021
EN 17432:2021 (E)
Unit
Symbol Quantity Unit
Symbol
Temperature of the heat transfer medium at heat
T
Degree Celsius °C
int, w
exchanger inlet
ṁ Mass flow kilogram per second kg/s
3
V Volume cubic metre
m
kilogram per cubic
3
ρ Density kg/m
metre
Q
Heat capacity of the heat exchanger kilowatt kW
Heat
cubic meters per
3
Volume flow m /s
V
second
Maximum measured external static pressure
∆p
Pascal Pa
i
difference between water inlet and outlet
∆P Static pressure difference Pascal Pa
Q
Total heating capacity of the heating device Watt W
Heat,i
Q
support cold
Cooling capacity of the support cold Watt W
Temperature difference between interior of the
∆T
calorimeter room and exterior of the calorimeter Kelvin K
i
room
Table 2 — Constants
Symbol Description Value
c 4,19 kJ/(kg ∙ K)
Specific heat capacity of water
p
5 Classification
Refrigerating units are labelled by listing their heat transfer mediums. The heat transfer medium of the
exterior heat exchanger (condenser) is listed in the first column, the heat transfer medium of the interior
heat exchanger (evaporator) is listed in the second column (see Table 3).
Table 3 — Labelling of refrigerating units
Heat transfer medium
Term
Exterior heat exchanger Interior heat exchanger
Air Air Air cooled refrigerating unit
Water Air Water cooled refrigerating unit
Liquid Air Liquid cooled refrigerating unit
8
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SIST EN 17432:2021
EN 17432:2021 (E)
6 Test conditions
6.1 General
The test procedures defined in this document provide methods for determining cooling capacities and
electrical power consumption of packaged refrigerating units as well as for determining heat recovery
capacities of water-cooled packaged refrigerating units. The tests can be performed under dry conditions
inside a calorimeter room, which is placed in a test chamber.
6.2 Testing conditions
The following test procedures are to be conducted under the nominal conditions given in Tables 4, 5 and
6), unless stated otherwise.
Table 4 — Air-to-air refrigerating unit – Nominal dry conditions
Application Exterior heat
Interior heat exchanger
exchanger
Dry bulb
Dry bulb
Rel. humidity at
temperature at
inlet
temperature at inlet
inlet
a
LT 32 °C −20 °C
a
MT 32 °C 0 °C
a
As low, as to prevent icing on the heat exchanger surface.
The manufacturer may choose the following additional testing conditions for air-to-air refrigerating
units:
— for cold climate: 15 °C for dry bulb temperature at inlet of exterior heat exchanger;
— for hot climate: 43 °C for dry bulb temperature at inlet of exterior heat exchanger
...
SLOVENSKI STANDARD
oSIST prEN 17432:2019
01-december-2019
Samostojne hladilne enote za male hladilnice - Razvrstitev, tehnične lastnosti in
preskus porabe energije
Packaged refrigerating units for walk-in cold rooms - Classification, performance and
energy consumption testing
Kälteaggregate für begehbare Kühlräume - Klassifikation, Prüfung der Leistung und des
Energieverbrauchs
Groupes frigorifiques prêts à monter pour chambres froides - Classification, performance
et essai de consommation d'énergie
Ta slovenski standard je istoveten z: prEN 17432
ICS:
27.200 Hladilna tehnologija Refrigerating technology
oSIST prEN 17432:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17432:2019
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oSIST prEN 17432:2019
DRAFT
EUROPEAN STANDARD
prEN 17432
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2019
ICS 27.200
English Version
Packaged refrigerating units for walk-in cold rooms -
Classification, performance and energy consumption
testing
Groupes frigorifiques prêts à monter pour chambres Kälteaggregate für begehbare Kühlräume -
froides - Classification, performance et essai de Klassifikation, Prüfung der Leistung und des
consommation d'énergie Energieverbrauchs
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 44.
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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17432:2019 E
worldwide for CEN national Members.
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols . 8
5 Classification . 9
6 Test conditions . 9
6.1 General . 9
6.2 Testing conditions . 9
6.3 Measurement uncertainty . 10
7 Test setup . 11
7.1 General . 11
7.2 Calorimeter room . 11
7.3 Arrangement of test and measurement equipment . 12
7.4 Installation and preparation of a test unit . 12
7.5 Measurement criteria . 13
7.6 Calibration test of the calorimeter room . 13
8 Performance Testing. 14
8.1 General . 14
8.2 Steady-state conditions . 14
8.3 Cooling Capacity tests . 15
8.3.1 Steady-state conditions . 15
8.3.2 Data acquisition . 15
8.3.3 Heat recovery capacity . 15
8.4 Calculation of the cooling capacity . 16
8.5 Measuring of total electric power consumption . 17
9 Test results . 17
10 Test report . 18
10.1 General information . 18
10.2 Information on the type plate . 19
Annex A (informative) Examples for the test setup . 20
A.1 General . 20
A.2 Examples . 20
Bibliography . 23
2
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
European foreword
This document (prEN 17432:2019) has been prepared by Technical Committee CEN/TC 44
“Commercial and Professional Refrigerating Appliances and Systems, Performance and Energy
Consumption”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
3
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
Introduction
This document was developed in order to provide a suitable method of performance testing of packaged
refrigerating unit for stationary cold room applications.
This is the first edition of this document. It includes testing only in so-called “dry conditions”. That
means, the evaporator does not show any ice formation during the test. Although it is well-known, that
such conditions do not represent the typical situation in the practical use of the packaged refrigerating
units, this edition of the document focusses on the description of a test procedure providing reliable test
results, which can be used to compare the performance of different models/types of packaged
refrigerating unit.
In order to keep the test procedure in this document practically oriented, tests under so-called ”wet
conditions” as well as taking defrost periods into account will be a future Work Item of the responsible
working group. The aim is to integrate such tests in a later revision of this document.
This document reflects the current market situation which shows that only refrigerating units without
integrated pump for the heat transfer medium on the exterior heat exchanger are offered.
4
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
1 Scope
This document defines classification criteria, test conditions and test procedures for performance
testing of packaged refrigerating units for stationary cold room applications. This includes ductless
units for cold storage applications at medium temperatures (MT) and low temperatures (LT) in either
compact or split designs, fitted with electrically driven compressors, which work according to the
vapour compression cycle.
2 Normative references
Not applicable.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
packaged refrigerating unit
functional unit incorporating a complete factory-made refrigerating system, as defined in EN 378-1,
mounted in a suitable frame and/or enclosure, that is fabricated and transported complete, or in two or
more sections and in which no refrigerant-containing parts are connected on site other than by
isolation valves, such as companion valves, and by interconnecting piping as defined by the
manufacturer
Note 1 to entry: A packaged refrigerating unit incorporates at least one refrigerant circuit, and can incorporate
one or more heat transfer circuits.
3.2
compact unit
packaged refrigerating unit, that has been assembled, filled ready for use, and is installed without the
need for connecting any refrigerant-containing parts
3.3
split unit
packaged refrigerating unit, comprising one unit providing cooling to the cold room and one unit used
for condensing the refrigerant
3.4
factory made
manufactured at a dedicated production location under control of a recognized quality system
Note 1 to entry: Assembling is manufacturing.
[SOURCE: EN 378-1:2016, 3.8.5, modified — The present Note 1 to entry was added.]
3.5
interior heat exchanger
heat exchanger in which liquid refrigerant is vaporized by absorbing heat from the interior heat
transfer medium, for the applications regarded here, the interior heat exchanger is usually called
’evaporator’
5
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
3.6
exterior heat exchanger
heat exchanger in which the refrigerant is cooled down due to heat dissipation by the exterior heat
transfer medium, for the applications regarded here, the exterior heat exchanger is usually called
‘condenser’
3.7
heat transfer medium
medium (water, air, etc.) which transfers heat without undergoing phase changes
3.8
dry bulb temperature
temperature of air measured by a thermometer exposed to the air but shielded from radiation and
moisture
3.9
calorimeter room
insulated test chamber which houses a heating device and the interior heat exchanger
3.10
test chamber
room in which the ambient air can be conditioned and kept in a steady state condition and in which the
exterior heat exchanger as well as the calorimeter are located
Note 1 to entry: See 7.2 for further explanation.
3.11
total cooling capacity
heat per unit of time transferred to the unit via heat transfer medium minus introduced heat of the fans
installed at the interior heat exchanger
3.12
latent cooling capacity
heat flow extracted from surrounding air by condensation of water vapour as well as icing, including
sub-cooling, of the evaporator surface
3.13
sensible cooling capacity
heat flow extracted from surrounding air by lowering the dry bulb temperature
3.14
total power consumption
average electrical power consumption of a system over time defined by:
a) power consumption of installed compressor and any power consumption during de-frosting
periods;
b) power consumption of any installed control or safety devices;
c) power consumption of any integrated device, like fans or pumps, for ensuring heat transfer
medium transport within the unit.
6
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
3.15
energy efficiency ratio
ratio of total cooling capacity to total power consumption of the unit
3.16
energy efficiency ratio including heat recovery
ratio of total cooling capacity to total power consumption of the unit including recovered heat from the
exterior heat exchanger of water-to-air units
3.17
operating limits
limitations in terms of maximum and minimum operating conditions (range of pressure, temperature,
voltage, humidity, etc.)
Note 1 to entry: The unit shall work as intended within the operating limits specified by the manufacturer.
3.18
nominal conditions
conditions that define a standard which reveals if a packaged refrigerating unit is working within those
defined limits
3.19
standard air conditions
3
condition of dry air at 20 °C with an air pressure of 101.325 kPa and with a density of 1.204 kg/m
3.20
support cold
independently working refrigerating unit to compensate heat losses through the calorimeter room
envelope
3.21
low temperature
LT
application, at which the packaged refrigerating unit is capable of delivering its nominal cooling
capacity at the interior heat exchanger inlet temperature of −20 °C
3.22
medium temperature
MT
application, at which the packaged refrigerating unit is capable of delivering its nominal cooling
capacity at the interior heat exchanger inlet temperature of 0 °C
7
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
4 Symbols
Table 1 — Quantities
UnitSy
Symbol Quantity Unit
mbol
Q Total cooling capacity Watt W
0
Q0L Latent cooling capacity Watt W
Q Sensible cooling capacity Watt W
0S
P Total power consumption Watt W
E
EER Energy efficiency ratio — —
EER Energy efficiency ratio including waste heat — —
x
A Length of the air inlet of the interior heat exchanger millimetres mm
Width/Height of the air inlet of the interior heat
B millimetres mm
exchanger
q Heat loss during calibration of the calorimeter room Watt per Kelvin W/K
Heat loss
P Total electric power consumption of the heating Watt W
Heater
T Internal temperature of the calorimeter room Kelvin K
int
T Ambient temperature of the test chamber Kelvin K
out
∆T Temperature spread (calibration) Kelvin K
Temperature of the heat transfer medium (water) at
T Degree Celsius °C
out,w
heat exchanger outlet
Temperature of the heat transfer medium (water) at
T Degree Celsius °C
int, w
heat exchanger inlet
m mass flow kilogram per second kg/s
3
V Volume Cubic metre m
kilogram per cubic
3
ρ Density kg/m
metre
Q heating capacity of the heat exchanger kilowatt kW
Heat
Cubic meters per
3
nominal volume flow m /s
V
F
second
maximum measured external static pressure
∆p Pascal P
i
difference between water inlet and outlet
η pump efficiency Percent %
Q total heating capacity of the heating device Watt W
Heat,i
Q cooling capacity of the support cold Watt W
support cold
Temperature spread between interior and exterior
∆T Kelvin K
,i
heat exchanger (measurement)
8
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
Table 2 — Constants
Symbol Description Value
c Specific heat capacity of water 4,19 kJ/(kg ∙ K)
p
5 Classification
Refrigerating units are labelled by listing their heat transfer mediums. The heat transfer medium of the
exterior heat exchanger (condenser) is listed in the first column, the heat transfer medium of the
interior heat exchanger (evaporator) is listed in the second column (see Table 3).
Table 3 — Labelling of refrigerating units
Heat transfer medium Term
Exterior heat exchanger Interior heat exchanger
Air Air Air cooled refrigerating unit
Water Air Water cooled refrigerating unit
Liquid Air Liquid cooled refrigerating unit
6 Test conditions
6.1 General
The test procedures defined in this document provide methods for determining cooling capacities and
electrical power consumption of packaged refrigerating units as well as for determining heat recovery
capacities of water-cooled packaged refrigerating units. The tests can be performed under dry
conditions inside a calorimeter room, which is placed in a test chamber.
6.2 Testing conditions
The following test procedures are to be conducted under the nominal conditions given in Tables 4,
5 and 6), unless stated otherwise.
Table 4 — Air-to-Air Refrigerating unit – Nominal Dry Conditions
Exterior Heat
Interior Heat Exchanger
Exchanger
Dry Bulb
Dry Bulb
Rel. Humidity at
Temperature at
inlet
Temperature at Inlet
Inlet
LT 32 °C −20 °C a
Nominal
Conditions for:
MT 32 °C 0 °C a
a
As low, as to prevent icing on the heat exchanger surface.
The manufacturer may choose the following additional testing conditions for air-to-air refrigerating
units:
— for cold climate: 15 °C for dry bulb temperature at inlet of exterior heat exchanger;
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oSIST prEN 17432:2019
prEN 17432:2019 (E)
— for hot climate: 43 °C for dry bulb temperature at inlet of exterior heat exchanger.
Table 5 — Water-to-Air Refrigerating unit – Nominal Dry Conditions
a
Interior Heat Exchanger
Exterior Heat Exchanger
Dry Bulb
Inlet Outlet Rel. Humidity at
Temperature at
temperature temperature inlet
Inlet
LT 30 °C 35 °C −20°C b
Nominal
Conditions for:
MT 30 °C 35 °C 0°C b
a
The heat transfer medium on the exterior heat exchanger shall be water.
b
As low, as to prevent icing on the heat exchanger surface.
Table 6 — Liquid-to-Air Refrigerating unit – Nominal Dry Conditions
a Interior Heat Exchanger
Exterior Heat Exchanger
Inlet Outlet Dry Bulb Rel. Humidity at
temperature temperature Temperature at inlet
Inlet
Nominal LT 10 °C 17 °C −20 °
...
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