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Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.Grip, Carl-Erik Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0001-8247-8320Nilsson, Leif SSAB EMEA, Luleå. 2013 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 112, 1032-1040 p.Article in journal (Refereed) Published

Abstract [en] : The surplus energy in rest gases is an important by-product in the SSAB EMEA steel plant in Luleå. The surplus is used in a local heat and power plant. Studies have been and are being carried out to find alternative use for the high calorific gases, especially the coke oven gas. The different gas flows typically are mixtures of irregularly distributed transients and non-periodic contents of different duration. Slowly varying fluctuations can probably be parried by good production planning. For shorter wavelengths some kind of safety margin could be appropriate, perhaps in the range 0.75–1.5 kN m3/h. However, the existing buffer capacity in gasholders, etc. is too small to cover the fluctuations. Good production planning can partly compensate low buffer capacity. An example from a period without gas holder is discussed.We describe analysis of the gas flows that can be used both for better production planning and for efficient external use, e.g., for fuel production. Rather than traditional Fourier analysis, we use wavelet analysis, which is better suited for analyzing the irregular and nonperiodic characteristics of the gas flows. We demonstrate such analysis on collected gas flow data from the SSAB EMEA steel plant and give some suggestions for how to make a good choice of wavelet basis for the analyzed signals.

Place, publisher, year, edition, pages: 2013. Vol. 112, 1032-1040 p.

Keyword [en] : Industrial engineering and economy - Other industrial engineering and economics, Chemical engineering - Metallurgical process and manufacturing engineering, Information technology - Signal processing, Mathematics

Keyword [sv] : Industriell teknik och ekonomi - Övrig industriell teknik och ekonomi, Kemiteknik - Metallurgisk process- och produktionsteknik, Informationsteknik - Signalbehandling, Matematik

National Category : Mathematical Analysis Energy Engineering

Research subject: Mathematics; Energy Engineering

Identifiers: URN: urn:nbn:se:ltu:diva-29328DOI: 10.1016/j.apenergy.2013.05.034Local ID: 2c4bb0d0-f822-4af5-bf7a-4674b92d262bOAI: oai:DiVA.org:ltu-29328DiVA: diva2:1002551

Conference: International Conference on Applied Energy : 05/07/2012 - 08/07/2012

Note: Validerad; 2013; 20120926 (grip); Konferensartikel i tidskriftAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-01-19Bibliographically approved



Autor: Grip, Niklas

Fuente: http://ltu.diva-portal.org/



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