This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Correlation between Batch (Bag) and Continuous Sampling for N 2 O Measurement in Diluted Exhaust from Light-Duty Vehicles
Technical Paper
2015-01-1993
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In the engine and vehicle test procedures described in Parts 1065/1066 of Title 40 of the Code of Federal Regulations (CFR), the United States Environmental Protection Agency (US-EPA) allows for the measurement of N2O emissions from sample storage bags, from a continuous dilute stream or a raw exhaust stream. Typically, batch (Bag) sampling has better accuracy and repeatability, but continuous sampling is more efficient in terms of test cell running time and provides test-mode emissions with good correlation to bag measurements.
In this study, correlations between bag sampling and continuous dilute exhaust sampling were investigated using a fleet of vehicles with a wide range of N2O emission levels. Very good correlation between these two sampling methods was observed for the majority of tests conducted. In the best cases, differences in average N2O concentration levels measured by these two methods were less than +/− 1%. Interferences, analyzer range correlation, accuracy of calibration gas, data sampling speed and other parameters that may influence the difference in N2O levels measured using the two sampling methods were examined.
Recommended Content
Authors
Citation
Rahman, M., Rooney, R., Akard, M., Hara, K. et al., "Correlation between Batch (Bag) and Continuous Sampling for N2O Measurement in Diluted Exhaust from Light-Duty Vehicles," SAE Technical Paper 2015-01-1993, 2015, https://doi.org/10.4271/2015-01-1993.Also In
References
- IPCC/UNEP/OECD/IEA Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories Paris Intergovernmental Panel on Climate Change, United Nations Environment Programme, Organization for Economic Co-Operation and Development, International Energy Agency 1997
- Environmental Protection Agency Electronic Code of Federal Regulation, Title 40, Parts 85, 86, 600, 1033, 1036, 1037, 1039, 1065, 1066, and 1068
- Electronic Code of Federal Regulation, Title 40: Protection of Environment, Part 1065: Engine Testing Procedures, Subpart C: Measurement Instruments, Section 1065.275: Measurement Devices
- Rahman Montajir , Hara Kenji , Nakatani Shigeru Measurement of Automobile Exhaust N 2 O in Continuous Dilute and in Sample Storage Bag by a Mid-IR Laser Spectroscopic Motor Exhaust Gas Analyzer SAE Paper No. 2012-01-875
- Rahman Montajir , Hara Kenji , Nakatani Shigeru , Tanaka Yoshimasa Development of an Ultra-Low Concentration N 2 O Analyzer Using Quantum Cascade Laser (QCL) SAE Paper No. 2010-01-1291
- Hara Kenji , Nakatani Shigeru , Rahman Montajir , Nakamura Hiroshi , Tanaka Yoshimasa , Ukon Junichiro Development of Nitrogen Components Analyzer Utilizing Quantum Cascade Laser SAE Paper No. 2009-01-2743
- Rahman Montajir , Hara Kenji , Nakatani Shigeru , Tanaka Yoshimasa Emission Testing of N 2 O (Bag Sampling) from Diverse Vehicles by Laser Spectroscopic Motor Exhaust Gas Analyzer SAE Paper No. 2011-01-1155
- Electronic Code of Federal Regulation, Title 40: Protection of Environment, Part 1065 and 1066: Engine and Vehicles Test Procedure