ISO 12569:2017
Thermal performance of buildings and materials — Determination of specific airflow rate in buildings — Tracer gas dilution method
ISO 12569:2017 establishes methods to obtain the ventilation rate or specific airflow rate in a building space (which is considered to be a single zone) using a tracer gas.
The measurement methods apply for spaces where the combined conditions concerning the uniformity of tracer gas concentration, measurement of the exhaust gas concentration, effective mixed zone and/or fluctuation of ventilation are satisfied.
ISO 12569:2017 provides three measurement methods using a tracer gas: concentration decay method, continuous dose method, and constant concentration method.
NOTE Specific measurement conditions are given in Table 1.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement method and its selection
4.1 General
4.2 Concentration decay method
4.2.1 Principle
4.2.2 Two-point decay method
4.2.3 Multipoint decay method
4.2.4 Step-down exhaust concentration method
4.2.5 Pulse method
4.3 Continuous dose method
4.3.1 Principle
4.3.2 Average inverse concentration method
4.3.3 Average concentration method
4.3.4 Stationary concentration method
4.4 Constant concentration method
4.5 Type of tracer gas
4.6 Measurement apparatus
4.6.1 General
4.6.2 Tracer gas dosing device
4.6.3 Tracer gas sampling apparatus
4.6.4 Gas analyser
5 Procedure
5.1 Building preparations
5.2 Ancillary measurements
5.3 Concentration decay method
5.3.1 Calculation of two-point and multi-point methods
5.3.2 Procedure of two-point and multi-point methods
5.3.3 Calculation of step-down exhaust concentration method and pulse method
5.3.4 Procedure of the step-down exhaust concentration method and pulse method
5.4 Continuous dose methods
5.4.1 Calculation of average of inverse concentration method
5.4.2 Procedure of average of inverse concentration method
5.4.3 Calculation of average concentration method
5.4.4 Procedure of average concentration method
5.4.5 Calculation of stationary concentration method
5.4.6 Procedure of stationary concentration method
5.5 Constant concentration method
5.5.1 Calculation of constant concentration method
5.5.2 Procedure of constant concentration method
6 Accuracy
6.1 General
6.2 Tracer gas dose procedure and room concentration distribution
6.3 Tracer gas sampling and storage method
6.4 Tracer gas concentration measuring instruments
6.4.1 General
6.4.2 Resolution
6.4.3 Tracer gas analyser drift
6.4.4 Accuracy of tracer gas analyser
6.4.5 Calibration of tracer gas analyser
6.4.6 Standard gas concentration
6.5 Changes in outside wind and outdoor air temperature and schedule of air conditioning system
7 Test report
7.1 General
7.2 Details necessary to identify the simulation tested
7.3 Details of heating and ventilation systems
7.4 Test conditions and apparatus
7.5 Collected data and results
7.6 Date of the test
Annex A (normative) Confidence intervals
Annex B (normative) Method to estimate ventilation rate Qv and effective mixed zone volume Vemz simultaneously[3][4]
Annex C (informative) Considerations when measuring the ventilation rate of large spaces
Annex D (informative) Effects of internal and external temperature difference, temperature change, and outdoor air concentration change during the measurement period
Annex E (informative) Estimation error minimizing method in two-point and multi-point decay methods
Annex F (informative) Propagation of error analysis
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement method and its selection
4.1 General
4.2 Concentration decay method
4.2.1 Principle
4.2.2 Two-point decay method
4.2.3 Multipoint decay method
4.2.4 Step-down exhaust concentration method
4.2.5 Pulse method
4.3 Continuous dose method
4.3.1 Principle
4.3.2 Average inverse concentration method
4.3.3 Average concentration method
4.3.4 Stationary concentration method
4.4 Constant concentration method
4.5 Type of tracer gas
4.6 Measurement apparatus
4.6.1 General
4.6.2 Tracer gas dosing device
4.6.3 Tracer gas sampling apparatus
4.6.4 Gas analyser
5 Procedure
5.1 Building preparations
5.2 Ancillary measurements
5.3 Concentration decay method
5.3.1 Calculation of two-point and multi-point methods
5.3.2 Procedure of two-point and multi-point methods
5.3.3 Calculation of step-down exhaust concentration method and pulse method
5.3.4 Procedure of the step-down exhaust concentration method and pulse method
5.4 Continuous dose methods
5.4.1 Calculation of average of inverse concentration method
5.4.2 Procedure of average of inverse concentration method
5.4.3 Calculation of average concentration method
5.4.4 Procedure of average concentration method
5.4.5 Calculation of stationary concentration method
5.4.6 Procedure of stationary concentration method
5.5 Constant concentration method
5.5.1 Calculation of constant concentration method
5.5.2 Procedure of constant concentration method
6 Accuracy
6.1 General
6.2 Tracer gas dose procedure and room concentration distribution
6.3 Tracer gas sampling and storage method
6.4 Tracer gas concentration measuring instruments
6.4.1 General
6.4.2 Resolution
6.4.3 Tracer gas analyser drift
6.4.4 Accuracy of tracer gas analyser
6.4.5 Calibration of tracer gas analyser
6.4.6 Standard gas concentration
6.5 Changes in outside wind and outdoor air temperature and schedule of air conditioning system
7 Test report
7.1 General
7.2 Details necessary to identify the simulation tested
7.3 Details of heating and ventilation systems
7.4 Test conditions and apparatus
7.5 Collected data and results
7.6 Date of the test
Annex A (normative) Confidence intervals
Annex B (normative) Method to estimate ventilation rate Qv and effective mixed zone volume Vemz simultaneously[3][4]
Annex C (informative) Considerations when measuring the ventilation rate of large spaces
Annex D (informative) Effects of internal and external temperature difference, temperature change, and outdoor air concentration change during the measurement period
Annex E (informative) Estimation error minimizing method in two-point and multi-point decay methods
Annex F (informative) Propagation of error analysis
Bibliography