Temat: NDIR - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Improving the accuracy of the NDIR-based CO2 sensor for breath analysis
Autorzy:: Prokopiuk, Artur
Bielecki, Zbigniew
Wojtas, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/2052156.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: NDIR
CO2 sensors
breath analysis
absorption spectroscopy
Opis:: The paper presents an analysis and practical study of the temperature and pressure influence on a non-dispersive infrared (NDIR) sensor for measuring the concentration of carbon dioxide in human breath. This sensor is used for monitoring patients’ carbon dioxide (CO2) in the exhaled air. High precision and accuracy of CO2 concentration measurements are essential in air sampling systems for breath analysers. They, however, require an analysis of the influence of the human exhaled air pressure and temperature on the NDIR CO2 sensor. Therefore, analyses of the changes in concentration were carried out at a pressure from 986 mbar to 1027 mbar and a temperature from 20°C to 36°C. Finally, corresponding correction coefficients were determined which allow to reduce the relative uncertainty of CO2 sensor measurements results from 19% to below 5%.
Źródło:: Metrology and Measurement Systems; 2021, 28, 4; 803-812
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Reproduction of chassis dynamometer driving cycles on the road as a means of achieving repeatable on-road emissions tests
Autorzy:: Vojtisek-Lom, M.
Fenkl, M.
Powiązania:: https://bibliotekanauki.pl/articles/243526.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
gaseous fuel mixtures
biogas
co-generation units
NDIR analyzer
gas mixture analysis
Opis:: Projected increases in the cost of conventional fossil energy sources and greenhouse gas emissions caps are among the key drivers for the utilization of various gaseous fuels prepared from biomass in internal combustion engines, primarily in cogeneration units. Due to the low energy content and other poor qualities of many such fuels, they are often intended to be co-fired with diesel fuel, or used in blends with natural gas or other gaseous fuels. Variations in the composition of the biogas, limited capabilities of gas mixing and metering devices, and other factors create challenges in determining the intake charge composition, so that optimal mixture of air and multiple fuels can be maintained. In this study, an experimental device for mixing of two gaseous fuels was tested, with various gases, on a bus engine modified to run on experimental gaseous fuel blends. To evaluate the performance of the mixing device, the composition of the mixture of two fuel gases was continuously analyzed by an inexpensive NDIR ,”garage-grade” exhaust gas analyzer. The focus of this paper is on the adaptation of the analyzer for this purpose, including calibration and linearization techniques, its verification, and performance. Preliminary results show that this analyzer, commonly used for automobile inspection and maintenance purposes, can serve, albeit with precautions and limitations, as a relatively simple tool for field measurements of the composition of a fuel gas mixture, both raw and mixed with air.
Źródło:: Journal of KONES; 2008, 15, 4; 577-582
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of gaseous fuel blends and mixtures using inexpensive "garage" gas analyzers
Autorzy:: Vojtisek-Lom, M.
Fenkl, M.
Powiązania:: https://bibliotekanauki.pl/articles/245801.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
gaseous fuel mixtures
biogas
co-generation units
NDIR analyzer
gas mixture analysis
Opis:: Projected increases in the cost of conventional fossil energy sources and greenhouse gas emissions caps are among the key drivers for the utilization of various gaseous fuels prepared from biomass in internal combustion engines, primarily in cogeneration units. Due to the low energy content and other poor qualities of many such fuels, they are often intended to be co-fired with diesel fuel, or used in blends with natural gas or other gaseous fuels. Variations in the composition of the biogas, limited capabilities of gas mixing and metering devices, and other factors create challenges in determining the intake charge composition, so that optimal mixture of air and multiple fuels can be maintained. In this study, an experimental device for mixing of two gaseous fuels was tested, with various gases, on a bus engine modified to run on experimental gaseous fuel blends. To evaluate the performance of the mixing device, the composition of the mixture of two fuel gases was continuously analyzed by an inexpensive NDIR ",garage-grade" exhaust gas analyzer. The focus of this paper is on the adaptation of the analyzer for this purpose, including calibration and linearization techniques, its verification, and performance. Preliminary results show that this analyzer, commonly used for automobile inspection and maintenance purposes, can serve, albeit with precautions and limitations, as a relatively simple tool for field measurements of the composition of a fuel gas mixture, both raw and mixed with air.
Źródło:: Journal of KONES; 2008, 15, 3; 535-541
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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