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.

General Information

Status
Published
Publication Date
21-May-2017
Current Stage
PPUB - Publication issued
Start Date
22-May-2017
Completion Date
22-May-2017
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IEC TR 63061
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
Adjusted volume calculation for refrigerating appliances
IEC TR 63061:2017-05(en)
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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

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 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

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IEC TR 63061:2017 © IEC 2017 – 3 –
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.

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– 4 – IEC TR 63061:2017 © IEC 2017

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IEC TR 63061:2017 © IEC 2017 – 5 –
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 of this document is therefore to

encourage alignment in national approaches to the definition and application of adjusted

volume.

IEC 62552-3 defines two ambient temperatures for energy consumption measurement. Many

countries, especially those with more temperate climates, will want to use this additional data

to more accurately reflect the likely energy consumption of refrigeration appliances during

normal use. This document assumes that the adjusted volume is calculated using the ambient

air temperature expected during normal use of the refrigerating appliance. It is hoped that this

will further encourage alignment of approaches across countries.

Ultimately, it is hoped that this document will foster dialogue and cooperation between

countries and encourage the use of more uniform approaches to the calculation and

application of adjusted volume, where this is used in energy efficiency policies and programs.

This will further encourage trade, development of more uniform efficiency benchmarks and

overall improvements in energy efficiency globally.
___________
1 Energy Standards and Labelling Programs Throughout The World In 2013, see

http://www.iea-4e.org/publications or http://www.iea-4e.org/document/343/energy-standards-labelling-programs-

throughout-the-world-in-2013
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– 6 – IEC TR 63061:2017 © IEC 2017
ADJUSTED VOLUME CALCULATION FOR REFRIGERATING APPLIANCES
1 Scope

This document, which is a technical report, 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.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.

IEC 62552-3:2015, Household refrigerating appliances – Characteristics and test methods –

Part 3: Energy consumption and volume
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
...

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