IEC TR 63061:2017
(Main)Adjusted volume calculation for refrigerating appliances
Adjusted volume calculation for refrigerating appliances
IEC TR 63061:2017(E) sets out a uniform calculation method for the parameter of adjusted volume that is commonly employed in the calculation of energy efficiency household refrigerators, freezers and refrigerator-freezers.
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IEC TR 63061 ®
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
Adjusted volume calculation for refrigerating appliances
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IEC TR 63061 ®
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
Adjusted volume calculation for refrigerating appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.040.30 ISBN 978-2-8322-4330-5
– 2 – IEC TR 63061:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Determination of adjusted volume . 7
4.1 General . 7
4.2 Determination of volume adjustment factor for each compartment type . 7
4.3 Adjusted volume calculation . 8
Annex A (informative) Average ambient temperature used to calculate the volume
adjustment factor . 9
Annex B (informative) Calculation of volume of sections or sub-compartments . 11
B.1 Calculation volume. 11
B.2 Calculation of the volume of the section or sub-compartment in the
compartment whose target temperatures are different from each other . 11
Annex C (informative) Normalized volume. 14
C.1 Background. 14
C.2 Normalized volume . 14
C.3 Worked example . 15
Bibliography . 16
Figure A.1 – Power consumed by a typical refrigerating appliance as a function of
ambient temperature . 9
Figure B.1 – Part with partition in the freezer is a two-star compartment . 11
Figure B.2 – Part without partition in the freezer is a two-star compartment . 11
Figure B.3 – Freezer door shelves are a two-star section or compartment . 12
Figure B.4 – Drawer-type compartment in the freezer is a two-star section or
compartment . 12
Figure B.5 – Space between a door shelf and drawer-type two-star section or
compartment . 13
Table 1 – Volume adjustment factor by compartment type. 8
Table A.1 – Suggested weighting of IEC energy values for different ambient
temperatures . 10
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ADJUSTED VOLUME CALCULATION FOR REFRIGERATING APPLIANCES
FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
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example "state of the art".
IEC TR 63061, which is a Technical Report, has been prepared by subcommittee 59M:
Performance of electrical household and similar cooling and freezing appliances, of IEC
technical committee 59: Performance of household and similar electrical appliances.
The text of this Technical Report is based on the following documents:
Enquiry draft Report on voting
59M/71/DTR 59M/79/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
– 4 – IEC TR 63061:2017 © IEC 2017
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INTRODUCTION
A recent international review of energy efficiency standards and energy labelling programs
around the world found that refrigerators and freezers were covered by programs in some 75
countries, which included some 185 separate program measures. The report found that
household refrigerators and freezers were the most frequently covered products around the
world in terms of programs to improve energy efficiency.
Despite being the most commonly covered products in energy efficiency programs, there are
a range of different approaches used in different countries to define energy efficiency for
refrigerators and freezers.
Besides specifying methods of energy measurement, IEC 62552-3 defines a clear and
accurate method for the measurement and determination of compartment volume of
household refrigerators and freezers. It is hoped that this international test method will be
adopted by all countries in their local energy efficiency programs. However, a uniform
approach to volume measurement is not always sufficient for energy efficiency policies, as
this fails to take into account the impact of compartments that operate at different
temperatures.
One of the most common approaches used to define the energy efficiency of refrigerators and
freezers is the concept of adjusted volume. This approach was developed in the 1980s and
essentially weights the volume of each compartment in proportion to the temperature
difference between the compartment temperature and the ambient temperature outside of the
appliance. This provides a method that takes into account, at least to some extent, the effect
of variations in the relative size of different temperature compartments between different
models. While there is a range of other possible approaches that can be used, adjusted
volume is one method that is widely used around the world.
While the concept of adjusted volume is widely used and well accepted, it appears that there
are some variations and differences in how this parameter is calculated and applied in
different countries. This creates anomalies in how energy efficiency parameters are calculated
between countries. While the exact approach used to define adjusted volume is ultimately a
matter for individual countries, it is hoped that this document will provide a clear explanation
of the approach and will provide a sound basis for how this can be applied in different
conditions, as dictated by local policies. The purpose
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