The article develops and analyzes a method of the comprehensive evaluation of the quality of natural gas as an energy source. The method is based on establishing the calorific value of natural gas as a determinative index of its quality, taking into account all gas properties: both those that positively affect the gas calorific value and its energy content, and those that adversely affect. The generalized definition of natural gas quality as the degree to which the set of the own gas characteristics (component composition and physical properties) meet the requirements concerning energy content, safety, ecology, and other factors is given. The results of experimental researches on natural gas quality according to the developed procedure are also presented.
[1] Euromot, "Requirements on the quality of natural gas", Euromot position paper, Novemeber 9, 2017. [Online]. Available: https://www.euromot.eu/wpcontent/uploads/2018/02/EUROMOT-Position-Gas-Qu... 2017-11-09-.pdf
[2] J. Leicher, A. Giese, K. Görner, M. Werschy, "Natural gas quality fluctuations - surveys and statistics on the situation in Germany", Energy Procedia. pp. 165-172, 2017.
https://doi.org/10.1016/j.egypro.2017.07.161
[3] H. Jaaskelainen, Natural Gas Quality, 2019.
[4] D. Lander, T. Humphreys, "The revision of ISO 6976 and assessment of the impacts of changes in this standard on the natural gas industry - NFOGM", 2019.
[5] V. Motalo, B. Stadnyk, A. Motalo, I. Likhnovsky, "Hydrocarbon Gases Quality: Impact on Sustainable Development Goals and Environment", Sustainable Production: Novel Trends in Energy, Environment and Material Systems. G.M. Krolczyk, Eds. Part 8, Springer, pp. 105-129, 2020.
https://doi.org/10.1007/978-3-030-11274-5_8
[6] ISO 13686:2013 Natural gas - Quality designation, 2013.
[7] ISO 14532:2014 Natural gas - Vocabulary, 2014.
[8] ISO 13443:1996 Natural gas - Standard reference conditions, 1996.
[9] K. Altfeld, D. Pinchbeck, "Admissible hydrogen concentrations in natural gas systems", 2013.
[10] BS EN 437:2018 Test gases. Test pressures. Appliance categories, 2018.
[11] ISO 15112:2018 Natural gas - Energy determination, 2018.
[12] ISO 6976:2016 Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition, 2016.
[13] ISO 6974-1:2012 Natural gas -Determination of composition and associated uncertainty by gas chromatography, Part 1: General guidelines and calculation of composition, 2012.
[14] K. N. Marsh, Amir Attari and Donald L.,"Calculation of the heating value of natural gas from the physicochemical properties of the pure components", Natural gas energy measurement, part II, London, pp. 142-147, 2005.
https://doi.org/10.4324/9780203216194-17
[15] ISO 9000:2015 Quality Management Systems - Fundamentals and Vocabulary, 2015.
[16] A. Motalo, V. Motalo, B. Stadnyk, M.Yatsyshyn, "Metrological Array of Cyber-Physical Systems. Part 9. Qualimetry of Natural Gas as Energy Source", Sensors and Transducers, vol. 190, no. 7, pp. 72-80, 2015.
[17] V. Motalo, B. Stadnyk, M. Mykyjchuk, A. Motalo, "Qualimetrical measurements: the methodology based on relationship between qualimetry and metrology", Metrology and Measurements Systems, vol. 26, no. 4, pp. 431-443, 2019.
[18] M. J. Moran, F. Kreith, "Combustion", The CRC Handbook of Thermal Engineering, 2000.
[19] ISO 18453:2004 Natural gas - Correlation between water content and water dew point, 2004.
[20] GOST 20060-83 Natural combustible gases - Methods for determining water vapour content and dew-point of moisture, 1983.
[21] D. Florinel, D. Vasile, "The correction of the gas humidity flow in a natural gases drying plant", Revista de Chimie, vol. 60, no. 10, pp. 1061-1064, 2009.
[22] Ye. S. Shchetinkov, The physics of the combustion of gases, 1969.