SIST EN 17432:2021

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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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

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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.
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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.
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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’
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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.
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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
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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)
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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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— 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 °
...