IEC 63277:2021

IEC 63277 ®
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
colour
inside
Binary power generation systems with capacity less than 100 kW – Performance
test methods
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IEC 63277 ®
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
colour
inside
Binary power generation systems with capacity less than 100 kW – Performance

test methods
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.190 ISBN 978-2-8322-1046-6

– 2 – IEC 63277:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Construction, power of binary power generation system . 8
4.1 General construction of binary power generation system. 8
4.2 Net power (Sending-end output) / Gross power (Generating power) . 8
5 Test condition . 8
5.1 General test condition . 8
5.2 Rated test condition . 9
5.2.1 General . 9
5.2.2 Tolerance of the rated net power . 9
5.3 Accuracy of instruments used for measurement . 9
5.3.1 Thermometer . 9
5.3.2 Flowmeter. 9
5.3.3 Three-phase power meter . 9
5.3.4 Calibration . 10
6 Measurement and calculation method of power output and power generation
efficiency . 10
6.1 Measurement method of net power (sending-end output) . 10
6.2 Measurement method of flow rate and temperature of hot water . 11
6.2.1 Temperature measurement of hot water . 11
6.2.2 Flow rate measurement of hot water . 12
6.3 Measurement method of flow rate and temperature of cooling water . 12
6.4 Calculation method of power output and power generation efficiency . 12
6.4.1 Receiving heat amount from hot water in the evaporator Q (kW) . 12
H
6.4.2 Net power (sending-end output) L (kW) . 12
net
6.4.3 Power generation efficiency η . 13
eout
7 Marking documentation . 13
7.1 Marking on the product . 13
7.2 Description in the technical documentation . 13
Annex A (informative) Specification of grid-connected inverter for power generation
systems . 15
A.1 Outline of the equipment . 15
A.2 Required specification . 15
Annex B (informative) Calculation of electric power efficiency . 16
Annex C (informative) Items of test report . 17

Figure 1 – Binary power generation system . 8
Figure 2 – Performance measuring method . 11
Figure 3 – Example of arrangement of hot water flowmeter . 12
Figure A.1 – Interconnection circuit diagram using grid-connect inverter . 15

Table 1 – Test conditions . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BINARY POWER GENERATION SYSTEMS WITH CAPACITY
LESS THAN 100 KW – PERFORMANCE TEST METHODS

FOREWORD
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International Standard IEC 63277 has been prepared by IEC project committee 126: Binary
power generation systems.
The text of this International Standard is based on the following documents:
Draft Report on voting
126/35/FDIS 126/38/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.

– 4 – IEC 63277:2021 © IEC 2021
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INTRODUCTION
This document deals with the performance test methods for binary power generation systems.
Binary power generation systems are capable of generating electric power even with a relatively
low temperature heat source, such as factory waste heat as well as renewable energy, such as
hot spring water, geothermal heat, solar heat, etc.
The system utilizes the heat of said heat source by transferring it to a working fluid via a heat
transport medium, instead of directly heating working fluid. Hence, it is called “binary system.”
By standardizing the performance measuring method of binary power generation systems,
energy conservation performance can be assessed legitimately, and it will also be reflected in
energy saving measures based on actual use. Increase of suppliers motivation for realizing high
energy saving performance is expected, and energy saving products will be promoted around
the world.
In addition, the world demand for binary power generation systems is also rising, and it is
expected to grow rapidly in the future.

– 6 – IEC 63277:2021 © IEC 2021
BINARY POWER GENERATION SYSTEMS WITH CAPACITY
LESS THAN 100 KW – PERFORMANCE TEST METHODS

1 Scope
This document specifies the performance test methods for binary power generation systems.
It defines the normalized test conditions and estimates the power generation efficiency of binary
power generation systems.
It specifies the binary power generation systems having heating medium of non-pressurized hot
water, with a maximum temperature less than 100 °C created by renewable energy or wasted
heat in the i
...