Fevzi BEDİR, Muhammet KAYFECİ, Hüseyin KURT

METAL HIDRÜR ESASLI HİDROJEN DEPOLAMA PARAMETRELERİNE REAKTÖR DİZAYNI VE HİDROJEN ŞARJ BASINCI ETKİSİNİN DENEYSEL OLARAK İNCELENMESİ

Metal hidrür reaktörlerden ısı transferi önemli oranda hidrür reaktörlere hidrojen şarj süresini etkilemektedir. Yapılan bu çalışmada, hidrojen şarjına etki eden, reaktör geometrisi ve alaşım özellikleri gibi bazı parametreler deneysel olarak incelenmiştir. Deneysel çalışmalarda iki farklı hidrür reaktör tasarlanmış ve imal edilmiştir. Her iki reaktör aynı iç hacimlerinde; kanatçıksız reaktör doğal konveksiyonla soğutulurken, ikinci reaktör kanatçıklı olarak dizayn edilmiştir. Reaktörlerin dört farklı noktasından, 2-8 bar arasında farklı hidrojen şarj basınçlarında sıcaklık değişimleri ölçülmüştür. Kanatçıklı reaktör ısı transferinin hızlı olmasına bağlı olarak; bütün şarj basınçlarında, daha hızlı şarj sürelerinde, düşük sıcaklık yükselmeleri göstermiştir. Depolanan hidrojen miktarı ise 2, 6 ve 10 bar hidrojen şarj basınçlarında kanatçıksız reaktörde sırasıyla ağırlıkça % 0.82, 0.94, 1.15 olurken, kanatçıklı reaktörde sırasıyla ağırlıkça % 0.91, 1.01, 1.24 olarak ölçülmüştür. Deney sonuçlarına göre reaktör üzerinde kanatçık imal edilmesi reaktöre hidrojen şarj süresini önemli oranda düşürmüştür. Ayrıca, LaNi5 alaşımlarına Al ilavesi hidrojen şarj süresini ve depolanan hidrojen miktarını düşürmüştür

EXPERIMENTAL INVESTIGATION OF THE EFFECTS OF VESSEL DESIGN AND HYDROGEN CHARGE PRESSURE ON METAL HYDRIDE BASED HYDROGEN

The hydrogen charge time in metal hydride vessel (MHV) is strongly influenced by the heat transfer from hydride vessel. In this study, the effect of parameters such as reactor geometry and alloy characteristics on hydrogen charge procedure is studied experimentally. In the experimental setup two different types of hydride vessel are designed and manufactured. Both vessels have the same interior volume; the un-finned type vessel cooled with natural convection and the second one was manufactured with fins around the vessel. The temperature variations of the vessel at four locations were measured charging with a range of pressure from 2 to 8 bar. The finned vessel show the lowest temperature increase with the fastest charging time under all charging pressures investigated. The stored hydrogen mass was measured as 0.82, 0.94, 1.15 wt% on un-finned vessel and 0.91, 1.01, 1.24 wt% on finned vessel at 2, 6 and 10 bar respectively. The experimental results show that the charge time of the vessel is considerably reduced, when the used fins manufacture on vessel. Furthermore, the addition of Al to the LaNi5 alloys has caused to reduce the hydrogen charge time and decreased of the stored hydrogen mass

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Muhammet KAYFECİ was born in Anamur in 1981. He graduated from Department of