IEC 62282-3-200:2015

Fuel cell technologies - Part 3-200: Stationary fuel cell power systems - Performance test methods

IEC 62282-3-200:2015 covers operational and environmental aspects of the stationary fuel cell power systems performance. The test methods apply as follows:
- power output under specified operating and transient conditions;
- electrical and heat recovery efficiency under specified operating conditions;
- environmental characteristics;
- for example, exhaust gas emissions, noise, etc. under specified operating and transient conditions. This new edition includes the following significant technical changes with respect to the previous edition: a stabilization zone of +- 10 % for thermal output of 100 % response time is provided instead of the tests for thermal output of 90 % response time, while the tests for electric output of 90 % response time remain as an option; the calculations for the ramp rate in kW/s are deleted and only the calculations for the response time (s) remain.

Technologies des piles à combustible - Partie 3-200: Systèmes à piles à combustible stationnaires - Méthodes d'essai des performances

L'IEC 62282-3-200:2015 couvre les aspects de fonctionnement et d'environnement des performances des systèmes à piles à combustible stationnaires. Les méthodes d'essai s'appliquent comme suit:
- puissance de sortie dans des conditions de fonctionnement spécifiées y compris les conditions transitoires;
- rendements de l'énergie électrique et de l'énergie thermique récupérable dans des conditions de fonctionnement spécifiées;
- caractéristiques d'environnement, par exemple, émissions de gaz d'échappement, bruit, etc., dans des conditions de fonctionnement spécifiées y compris les conditions transitoires. Cette nouvelle édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: une zone de stabilisation de +- 10 % pour une sortie thermique d'un temps de réponse à 100 % est fournie en lieu et place des essais de sortie thermique d'un temps de réponse à 90 %, alors que les essais de sortie électrique d'un temps de réponse à 90 % restent facultatifs; les calculs relatifs au taux de variation en kW/s sont supprimés et seuls les calculs relatifs au(x) temps de réponse sont maintenus.

General Information

• Status: Published
• Publication Date: 18-Nov-2015
• ICS: 27.070 - Fuel cells
• Technical Committee: TC 105 - Fuel cell technologies
• Drafting Committee: MT 202 - TC 105/MT 202
• Current Stage: PPUB - Publication issued
• Start Date: 19-Nov-2015
• Completion Date: 30-Nov-2015

Relations

• Revised: IEC 62282-3-200:2025 - Fuel cell technologies - Part 3-200: Stationary fuel cell power systems - Performance test methods
• Effective Date: 05-Sep-2023
• Revises: IEC 62282-3-200:2011 - Fuel cell technologies - Part 3-200: Stationary fuel cell power systems - Performance test methods
• Effective Date: 05-Sep-2023

Overview

IEC 62282-3-200:2015 is an international standard published by the International Electrotechnical Commission (IEC) that defines performance test methods for stationary fuel cell power systems. This standard specifically addresses operational, electrical, thermal, and environmental aspects of fuel cell technologies used in stationary power generation. The document provides detailed methodologies for assessing the power output, efficiency, response characteristics, emissions, noise, and other environmental parameters of fuel cell systems under controlled test conditions.

The purpose of this standard is to promote consistent and reliable testing procedures, ensuring comparability and quality assurance in stationary fuel cell power system performance evaluation. The 2015 edition includes updated technical requirements such as a stabilization zone for thermal output measurements and refinement of response time calculations, making it relevant for manufacturers, testing laboratories, and regulatory agencies involved in fuel cell technology development and deployment.

Key Topics

• Performance Testing Scope: Covers output power measurement under steady-state and transient conditions, electrical and heat recovery efficiency, and environmental factors like exhaust gas emissions and noise levels.
• Test Preparation and Instrumentation: Guidance on uncertainty analysis, selection and calibration of measurement instruments, and data acquisition plans to ensure accurate and reproducible results.
• Measurement Methods:
  • Electrical power and fuel input measurement.
  • Recovered heat quantification.
  • Gas flow (fuel, oxidant, purge) and exhaust monitoring.
  • Noise and vibration level determination.
• Test Procedures:
  • Efficiency tests including input-output energy computations.
  • Power output response and ramp time tests under dynamic load.
  • Start-up and shutdown performance evaluations with energy consumption analysis.
  • Purge gas consumption and optional water consumption tests.
  • Emission concentration calculation and noise/vibration analysis methods.
• Reporting Requirements: Structured formats for summary, detailed, and full test reports to document methodology, conditions, and results effectively.

Applications

IEC 62282-3-200:2015 applies predominantly to the stationary power generation sector employing fuel cell technologies. Key practical uses include:

• Performance Validation: Standardized testing for manufacturers confirming that stationary fuel cell power systems meet contractual and regulatory performance specifications.
• Product Development: Assisting R&D teams in benchmarking efficiency and dynamic response characteristics during prototype evaluation and system optimization.
• Compliance and Certification: Providing authorities and certification bodies with authoritative test methods to assess environmental impact (e.g., emissions, noise) and operational robustness.
• Quality Assurance: Enabling consistent quality checks throughout the lifecycle of fuel cell power systems, including manufacturing and operational maintenance phases.
• Energy Efficiency Analysis: Facilitating detailed assessment of electrical and thermal energy conversion efficiencies, supporting energy management and sustainability initiatives.

Related Standards

• IEC 62282 Series: Covers general requirements, safety aspects, and specific fuel cell technology types beyond stationary systems.
• IEC 60068 Series: Related environmental testing standards for electrical equipment complementing emission and noise tests.
• ISO 14687: Specifies hydrogen fuel quality requirements applicable to fuel cells.
• EN 50272: Addresses safety requirements for stationary batteries used alongside fuel cell power systems.
• ISO 9809: Pertains to compressed gas cylinders often used as hydrogen storage in fuel cell power configurations.

---

Adhering to IEC 62282-3-200:2015 ensures rigorous and harmonized evaluation of stationary fuel cell power systems, supporting market confidence in fuel cell technologies as a clean, efficient, and reliable energy solution. This standard is essential for stakeholders aiming to optimize fuel cell system performance while complying with international best practices and regulatory frameworks.

Standards Content (Sample)

IEC 62282-3-200 ®
Edition 2.0 2015-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fuel cell technologies –
Part 3-200: Stationary fuel cell power systems – Performance test methods

Technologies des piles à combustible –
Partie 3-200: Systèmes à piles à combustible stationnaires – Méthodes d'essai
des performances
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IEC 62282-3-200 ®
Edition 2.0 2015-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fuel cell technologies –
Part 3-200: Stationary fuel cell power systems – Performance test methods

Technologies des piles à combustible –

Partie 3-200: Systèmes à piles à combustible stationnaires – Méthodes d'essai

des performances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.070 ISBN 978-2-8322-2985-9

– 2 – IEC 62282-3-200:2015 © IEC 2015
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms, definitions, operating process and symbols . 11
3.1 Terms and definitions . 11
3.2 Operating process. 16
3.3 Symbols . 17
4 Reference conditions . 20
4.1 General . 20
4.2 Temperature and pressure . 21
4.3 Heating value base . 21
5 Item of performance test . 21
6 Test preparation . 22
6.1 General . 22
6.2 Uncertainty analysis . 22
6.2.1 Uncertainty analysis items . 22
6.2.2 Data acquisition plan . 22
7 Measurement instruments and measurement methods . 22
7.1 General . 22
7.2 Measurement instruments . 23
7.3 Measurement methods . 23
7.3.1 Electric power measurements . 23
7.3.2 Fuel input measurement . 24
7.3.3 Recovered heat measurement . 27
7.3.4 Purge gas flow measurement . 27
7.3.5 Oxidant (air) input measurement . 28
7.3.6 Other fluid flow measurement . 29
7.3.7 Exhaust gas flow measurement . 29
7.3.8 Discharge water measurement. 30
7.3.9 Noise level measurement. 31
7.3.10 Vibration level measurement . 31
7.3.11 Total harmonic distortion measurement . 31
7.3.12 Ambient condition measurement . 31
8 Test plan . 32
8.1 General . 32
8.2 Ambient conditions. 32
8.3 Maximum permissible variation in steady-state operating conditions . 33
8.4 Test operating procedure . 33
8.5 Duration of test and frequency of readings . 33
9 Test methods and computation of test results . 34
9.1 General . 34
9.2 Efficiency test . 34
9.2.1 General . 34
9.2.2 Test method . 34

9.2.3 Computation of inputs . 34
9.2.4 Computation of output . 44
9.2.5 Computation of waste heat rate . 45
9.2.6 Computation of efficiencies . 45
9.3 Electric power and thermal power response characteristics test . 46
9.3.1 General . 46
9.3.2 Criteria for the determination of attaining the steady-state set value . 47
9.3.3 Electric power output response time test. 48
9.3.4 90 % response time of rated net electric power output (optional) . 49
9.3.5 Thermal power output response time test . 50
9.4 Start-up and shutdown characteristics test . 51
9.4.1 General . 51
9.4.2 Test method for start-up characteristics test . 51
9.4.3 Test method for shutdown characteristics test . 51
9.4.4 Calculation of the start-up time . 52
9.4.5 Calculation of the shutdown time . 52
9.4.6 Calculation of the different forms of start-up energy . 52
9.4.7 Calculation of the start-up energy . 54
9.5 Purge gas consumption test . 54
9.5.1 General . 54
9.5.2 Test method . 54
9.6 Water consumption test (optional) . 55
9.6.1 General . 55
9.6.2 Test method . 55
9.7 Exhaust gas emission test . 55
9.7.1 General . 55
9.7.2 Test method . 55
9.7.3 Data processing of emission concentration . 56
9.7.4 Calculation of mean mass discharge rate . 56
9.7.5 Calculation of mass concentration . 56
9.8 Noise level test . 56
9.8.1 General . 56
9.8.2 Test method . 56
9.8.3 Data processing . 57
9.9 Vibration level test . 57
9.10 Discharge water quality test . 58
9.10.1 General . 58
9.10.2 Test method . 58
10 Test reports . 59
10.1 General . 59
10.2 Title page . 59
10.3 Table of contents . 59
10.4 Summary report . 59
10.5 Detailed report . 59
10.6 Full report . 60
Annex A (normative) Uncertainty analysis . 61
A.1 General . 61
A.2 Preparations . 61
A.3 Basic assumptions . 62

– 4 – IEC 62282-3-200:2015 © IEC 2015
A.4 General approach . 62
Annex B (normative) Calculation of fuel heating value . 64
Annex C (normative) Reference gas . 68
C.1 General . 68
C.2 Reference gases for natural gas and propane gas . 68
Annex D (informative) Maximum acceptable instantaneous electric power output
transient . 71
Bibliography . 72

Figure 1 – Fuel cell power system diagram . 9
Figure 2 – Operating process chart of fuel cell power system . 17
Figure 3 – Symbol diagram . 20
Figure 4 – Electric and thermal power response time . 47
Figure 5 – Example of electric and thermal power response time to attain steady-state
set value . 48
Figure 6 – Example of electric power chart at start-up . 51
Figure 7 – Electric power chart at shutdown . 52

Table 1 – Symbols . 18
Table 2 – Test classification and test item. 21
Table 3 – Test item and system status . 32
Table 4 – Maximum permissible variations in test operating conditions . 33
Table 5 – Vibration correction factors . 58
Table B.1 – Heating value for component of gaseous fuel . 64
Table C.1 – Reference gas for natural gas . 69
Table C.2 – Reference gas for propane gas . 69

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FUEL CELL TECHNOLOGIES –
Part 3-200: Stationary fuel cell power systems –
Performance test methods
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62282-3-200 has been prepared by IEC technical committee 105:
Fuel cell technologies.
This second edition cancels and replaces the first edition of IEC 62282-3-200, published in
2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) a stabilization zone of ± 10 % for thermal output of 100 % response time is provided
instead of the tests for thermal output of 90 % response time, while the tests for electric
output of 90 % response time remain as an option;
b) the calculations for the ramp rate in kW/s are deleted and only the calculations for the
response time (s) remain;
– 6 – IEC 62282-3-200:2015 © IEC 2015
c) the procedures, criteria and figures of 9.3, Electric power and thermal power response
characteristics test, are modified to ensure they produce accurate and consistent results;
d) maximum acceptable instantaneous electric power output transient is moved to informative
Annex D.
IEC has published a related but independent standard IEC 62282-3-201 on performance test
methods of small stationary fuel cell power systems which is harmonized with this standard.
The text of this standard is based on the following documents:
FDIS Report on voting
105/547/FDIS 105/555/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 62282 series, published under the general title Fuel cell
technologies, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This part of IEC 62282 describes how to measure the performance of stationary fuel cell
power systems for residential, commercial, agricultural and industrial applications.
This standard describes type tests and their test methods only. In this standard, no routine
tests are required or identified, and no performance targets are set.
The following fuel cell types have been considered:
– alkaline fuel cells (AFC);
– phosphoric acid fuel cells (PAFC);
– polymer electrolyte fuel cells (PEFC);
– molten carbonate fuel cells (MCFC);
– solid oxide fuel cells (SOFC).

– 8 – IEC 62282-3-200:2015 © IEC 2015
FUEL CELL TECHNOLOGIES –
Part 3-200: Stationary fuel cell power systems –
Performance test methods
1 Scope
This part of IEC 62282 covers operational and environmental aspects of the stationary fuel
cell power systems performance. The test methods apply as follows:
– power output under specified operating and transient conditions;
– electrical and heat recovery efficiency under specified operating conditions;
– environmental characteristics; for example, exhaust gas emissions, noise, etc. under
specified operating and transient conditions.
This standard does not provide coverage for electromagnetic compatibility (EMC).
This standard does not apply to small stationary fuel cell power systems with electric power
output of less than 10 kW which are dealt with IEC 62282-3-201.
Fuel cell power systems may have different subsystems depending upon types of fuel cell and
applications, and they have different streams of material and energy into and out of them.
However, a common system diagram and boundary has been defined for evaluation of the
fuel cell power system (see Figure 1).
The following conditions are considered in order to determine the system boundary of the fuel
cell power system:
– all energy recovery systems are included within the system boundary;
– all kinds of electric energy storage devices are considered outside the system boundary;
– calculation of the heating value of the input fuel (such as natural gas, propane gas and
pure hydrogen gas, etc.) is based on the conditions of the fuel at the boundary of the fuel
cell power system.
Power inputs:
System boundary
electric, external
thermal, shaft work
Recovered heat
Thermal
management
system
Waste heat
Fuel
Fuel processing
Useable power
Fuel
system
electric
cell
Power
module
conditioning
system
Oxidant
Oxidant
processing Water
system
Water treatment Internal power Discharge
system needs water
Inert Gas
Exhaust gases,
ventilation
Automatic
Ventilation
Ventilation
control
system
EMI
system
Noise,
EMD
vibration
Vibration,
wind, rain,
temperature
IEC
etc.
Key
Fuel cell power system including subsystems. The interface is defined as a conceptual or functional
one instead of hardware such as a power package.

Subsystems; fuel cell module, fuel processor, etc. These subsystem configurations depend on the
kind of fuel, type of fuel cell or system.

The interface points in the boundary to be measured for calculation data.

EMD electromagnetic disturbance
EMI electromagnetic interference
Figure 1 – Fuel cell power system diagram
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60051 (all parts), Direct acting indicating analogue electrical measuring instruments and
their accessories
IEC 60359, Electrical and electronic measurement equipment – Expression of performance
IEC 60688, Electrical measuring transducers for converting A.C. and D.C. electrical quantities
to analogue or digital signals
IEC 61000-4-7, Electromagnetic compatibility (EMC) – Part 4-7: Testing and measurement
techniques – General guide on harmonics and interharmonics measurements and
instrumentation, for power supply systems and equipment connected thereto
IEC 61000-4-13, Electromagnetic compatibility (EMC) – Part 4-13: Testing and measurement
techniques – Harmonics and interharmonics including mains signalling at a.c. power port, low
frequency immunity tests
– 10 – IEC 62282-3-200:2015 © IEC 2015
IEC 61028, Electrical measuring instruments – X-Y recorders
IEC 61143 (all parts), Electrical measuring instruments – X-t recorders
IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications
IEC 61672-2, Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests
IEC 62052-11, Electricity metering equipment (AC) – General requirements, tests and test
conditions – Part 11: Metering equipment
IEC 62053-22, Electricity metering equipment (a.c.) – Particular requirements – Part 22: Static
meters for active energy (classes 0,2 S and 0,5 S)
IEC 62282-3-201, Fuel cell technologies – Part 3-201: Stationary fuel cell power systems –
Performance test methods for small fuel cell power systems
ISO/IEC Guide 98-3, Uncertainty of measurement – Part 3: Guide to the expression of
uncertainty in measurement (GUM: 1995)
ISO 3648, Aviation fuels – Estimation of net specific energy
ISO 3744, Acoustics – Determination of sound power levels and sound energy levels of noise
sources using sound pressure – Engineering methods for an essentially free field over a
reflecting plane
ISO 4677-1, Atmospheres for conditioning and testing – Determination of relative humidity –
Part 1: Aspirated psychrometer method
ISO 4677-2, Atmospheres for conditioning and testing – Determination of relative humidity –
Part 2: Whirling psychrometer method
ISO 5167 (all parts), Measurement of fluid flow by means of pressure differential devices
inserted in circular cross-section conduits running full
ISO 5348, Mechanical vibration and shock – Mechanical mounting of accelerometers
ISO 5815-2, Water quality – Determination of biochemical oxygen demand after n days (BODn)
– Part 2: Method for undiluted samples
ISO 6060, Water quality – Determination of the chemical oxygen demand
ISO 6326 (all parts), Natural gas − Determination of sulfur compounds
ISO 6974 (all parts), Natural gas − Determination of composition and associated uncertainty
by gas chromatography
ISO 6975 (all parts), Natural gas − Extended analysis – Gas chromatographic method
ISO 7934, Stationary source emissions – Determination of the mass concentration of sulfur
dioxide – Hydrogen peroxide/barium perchlorate/Thorin method
ISO 7935, Stationary source emissions – Determination of the mass concentration of sulfur
dioxide – Performance characteristics of automated measuring methods

− Specifications of marine fuels
ISO 8217, Petroleum products – Fuel (class F)
ISO 10101 (all parts), Natural gas − Determination of water by the Karl Fisher method
ISO 10396, Stationary source emissions – Sampling for the automated determination of gas
emission concentrations for permanently installed monitoring systems
ISO 10523, Water quality – Determination of pH
ISO 10849, Stationary source emissions – Determination of the mass concentration of
nitrogen oxides – Performance characteristics of automated measuring systems
ISO 11042-1, Gas turbines – Exhaust gas emission – Part 1: Measurement and evaluation
ISO 11042-2, Gas turbines – Exhaust gas emission – Part 2: Automated emission monitoring
ISO 11541, Natural gas – Determination of water content at high pressure
ISO 11564, Stationary source emissions – Determination of the mass concentration of
nitrogen oxides – Naphthylethylenediamine photometric method
ISO 11632, Stationary source emissions – Determination of mass concentration of sulfur
dioxide – Ion chromatography method
ISO 14687-1, Hydrogen fuel – Product specification – Part 1: All applications except proton
exchange membrane (PEM) fuel cell for road vehicles
ISO/TR 15916, Basic consideration for the safety of hydrogen systems
ISO 16622, Meteorology – Sonic anemometers/thermometers – Acceptance test methods for
mean wind measurements
ASTM D4809, Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by
Bomb Calorimeter (Precision Method)
ASTM F2602, Standard Test Method for Determining the Molar Mass of Chitosan and
Chitosan Salts by Size Exclusion Chromatography with Multi-angle Light Scattering Detection
(SEC-MALS)
3 Terms, definitions, operating process and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
auxiliary electric power input
electric power for auxiliary machines and equipment supplied from outside the system
boundary
3.1.2
background noise level
sound pressure level of ambient noise at the measurement point
Note 1 to entry: This measurement is taken as described in this standard with the fuel cell power system in the
cold state.
– 12 – IEC 62282-3-200:2015 © IEC 2015
3.1.3
background vibration level
mechanical oscillations caused by the environment that affect vibration level readings
Note 1 to entry: In this standard, background vibration is measured with the fuel cell power system in the cold
state.
3.1.4
cold state
state of a fuel cell power system at ambient temperature with no power input or output
3.1.5
discharge water
water discharged from the fuel cell power system including waste water and condensate
3.1.6
electrical efficiency
ratio of the average net electric power output produced by a fuel cell power system to the
average total power input supplied to the fuel cell power system
Note 1 to entry: Lower heating value (LHV) is assumed unless otherwise stated.
Note 2 to entry: Any electric power that is supplied to auxiliary machines and equipment of a fuel cell power
system from an external source is deducted from the electric power output of the fuel cell power system.
[SOURCE: IEC TS 62282-1:2013, 3.30.1, modified – ”average” added to “net electric power
output”; “average total power input” instead of “total enthalpy flow”; Note 2 to entry” added]
3.1.7
external thermal energy
additional thermal energy input from outside the system boundary, such as cycle make-up and
process condensate return
3.1.8
fuel cell module
assembly incorporating one or more fuel cell stacks and, if applicable, additional components,
which is intended to be integrated into a power system
Note 1 to entry: A fuel cell module is comprised of the following main components: one or more fuel cell stack(s),
piping system for conveying fuels, oxidants and exhausts, electric connections for the power delivered by the
stack(s) and means for monitoring and/or control. Additionally, a fuel cell module may comprise: means for
conveying additional fluids (e.g. cooling media, inert gas), means for detecting normal and/or abnormal operating
conditions, enclosures or pressure vessels and module ventilation systems, and the required electronic
components for module operation and power conditioning.
[SOURCE: IEC TS 62282-1:2013, 3.48, modified – “or a vehicle” deleted]
3.1.9
fuel cell power system
generator system that uses one or more fuel cell module(s) to generate electric power and
heat
Note 1 to entry: A fuel cell power system is composed of all or some of the systems shown in Figure 1.
3.1.10
fuel input
amount of natural gas, hydrogen, methanol, liquid petroleum gas, propane, butane, or other
substance containing chemical energy introduced to the fuel cell power system during
specified operating conditions

3.1.11
heat recovery efficiency
ratio of the average recovered thermal power output of a fuel cell power system to the
average total power input supplied to the fuel cell power system
[SOURCE: IEC TS 62282-1:2013, 3.30.3, modified – “average recovered thermal power
output” instead of “recovered heat flow”; “average total power input” instead of “total enthalpy
flow”]
3.1.12
interface point
measurement point at the boundary of a fuel cell power system at which material and/or
energy either enters or leaves
Note 1 to entry: This boundary is intentionally selected to accurately measure the performance of the system. If
necessary, the boundary or the interface points of the fuel cell power system (Figure 1) to be assessed should be
determined by agreement of the parties.
3.1.13
minimum power
minimum net electric power output at which a fuel cell power system is able to operate
continuously in a stable manner
[SOURCE: IEC TS 62282-1:2013, 3.85.2, modified – “output” added, “Note 1 to entry” deleted]
3.1.14
noise level
sound pressure level produced by a fuel cell power system
Note 1 to entry: Expressed in decibels (dB) and measured at a specified distance and in all operation modes as
described in this standard.
3.1.15
operating temperature
temperature at which fuel cell power system operates and is specified with a measuring point
by the manufacturer
3.1.16
overall energy efficiency
ratio of total useable power output (net electrical power and recovered thermal power) to the
average total power input supplied to the fuel cell power system
Note 1 to entry: The supplied total power input of the fuel should be related to lower heating value (LHV) for a
better comparison with other types of energy conversion systems.
Note 2 to entry: Refer to 4.3 regarding reporting based on LHV or HHV.
[SOURCE: IEC TS 62282-1:2013, 3.30.4, modified – alternative expression “or total thermal
efficiency” deleted; “power output” instead of “energy flow”; “average total power input”
instead of “total enthalpy flow”]
3.1.17
oxidant input
amount of oxidant (air) input into the inside of the fuel cell module during specified operating
conditions
Note 1 to entry: The oxidant is usually air, but other oxidants (e.g., oxygen) can be used.

– 14 – IEC 62282-3-200:2015 © IEC 2015
3.1.18
power response time
duration between the instant of initiating a change of electric or thermal power output and
when the electric or thermal power output attains the steady state set value within tolerance
3.1.19
90 % power response time
duration between the instant of initiating a change of electric or thermal power output and
when the electric or thermal power output attains 90 % of the desired value
3.1.20
pre-generation state
state of a fuel cell power system being at sufficient operating temperature and in such an
operational mode, with zero electric power output, that the fuel cell power system is capable
of being promptly switched to an operational state with substantial electric or thermal active
power output
[SOURCE: IEC TS 62282-1:2013, 3.110.4, modified – “or thermal active” added]
3.1.21
purge gas consumption
amount of inert gas or dilution gas supplied to the fuel cell power system during specific
conditions to make it ready for operation or shutdown
3.1.22
rated power
maximum continuous electric power output that a fuel cell power system is designed to
achieve under normal operating conditions specified by the manufacturer
[SOURCE: IEC TS 62282-1:2013, 3.85.4, modified – “Note 1 to entry” deleted]
3.1.23
recovered heat
thermal energy that has been recovered for useful purposes
Note 1 to entry: The recovered heat is measured by determining the temperatures and flow rates of heat recovery
fluid (water, steam, air or oil, etc.), entering and leaving the thermal energy recovery subsystem at the interface
point of the fuel cell power system.
[SOURCE: IEC TS 62282-1:2013, 2.2, modified – “Note 1 to entry” added]
3.1.24
reference condition
values of influence quantities prescribed for testing the performance of a measuring
instrument, which in this document are 288,15 K (15 °C) for temperature and 101,325 kPa for
pressure
3.1.25
response time to rated power
duration between the instant when the step load change to rated power is initiated and the
first instant when this value is delivered within a tolerance value
3.1.26
shaft work
mechanical energy input from outside the system boundary for accomplishing useful work

3.1.27
shutdown time
duration between the instant when the load is removed at rated power and the instant when
the shutdown is completed as specified by the manufacturer
Note 1 to entry: The shutdown operation is classified into types: normal shutdown and emergency shutdown.
[SOURCE: IEC TS 62282-1:2013, 3.115.4, modified – “at rated power” added, “Note 1 to
entry” added]
3.1.28
start-up energy
sum of the electric, thermal, mechanical and/or chemical (fuel) energy required by a fuel cell
power system during the start-up time
[SOURCE: IEC TS 62282-1:2013, 3.109, modified – “mechanical” added]
3.1.29
start-up time
a) for fuel cell power systems that do not require external energy to maintain a storage state,
duration required for transitioning from cold state to positive net electrical power output;
and
b) for fuel cell power systems that require external power to maintain a storage state,
duration required for transitioning from storage state to positive net electrical power output
[SOURCE: IEC TS 62282-1:2013, 3.115.5, modified – “positive” added]
3.1.30
storage state
state of a fuel cell power system being non-operational and possibly requiring, under
conditions specified by the manufacturer, the input of
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