At the storage pressures that are known to be feasible with existing containment systems, Compressed Natural Gas (CNG) occupies approximately four times the volume needed for conventional liquid fuels. Consequently, in alternatively fuelled vehicles, finding the necessary storage space presents an even more severe problem than accommodating the mass of the gas containment system. Under these circumstances, shape options other than the cylinder are of particular value in allowing better use to be made of the available volume. Toroidal vessels are of particular value in being able to fit spaces that cannot be filled efficiently using cylinders. The spare wheel well is one example of such a space. DERA is developing an overwound toroidal pressure vessel. that is suitable for high pressure use and is comparable in mass to an equivalent cylinder. The application originally envisaged for this was compressed air storage for man-portable Breathing Apparatus (BA) sets, but the larger sizes needed for fuel gas storage are equally feasible. This paper outlines the design of such vessels and the necessary fabrication routes. It also provides mass and dimensional estimates for a range of vessels.
Overwound toroidal pressure vessels for CNG and hydrogen storage in alternatively fuelled vehicles
Umwickelte ringförmige Druckbehälter für Erdgas- und Wasserstoffspeicherung in Fahrzeugen mit alternativem Kraftstoff
2000
13 Seiten, 7 Bilder, 13 Quellen
Conference paper
English
Overwound toroidal pressure vessels for CNG and hydrogen storage in alternatively fuelled vehicles
Automotive engineering | 2000
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