Ertuğrul CİHAN, Barış KAVASOĞULLARI, Hasan DEMİR

Anülus Kanalda Hava-Hava Arası Nem Geçişinde Membranın Etkisinin İncelenmesi ve Kütle Transfer Eşitliklerinin Çıkarılması

Bu çalışmada, anülus kanalda hava-hava arasında nem geçişinde membranın etkisi incelenmiş, nemli hava-kuru hava akışkanları için matematiksel modelleme yapılmıştır. Oluşturulan modelin paralel ve karşıt akış tiplerinde COMSOL Multiphysics yazılımı kullanılarak kütle transferi eşitlikleri çıkarılıp analizler gerçekleştirilmiştir. Sistemin MATLAB yazılımında sonlu farklar yöntemi ile aynı şartlarda modellemesi yapılarak COMSOL yazılımında elde edilen sonuçların düşük bağıl hatayla doğrulaması yapılmıştır. Hesaplama sonuçlarına göre paralel ve karşıt akışta en yüksek Sherwood sayısı (Sh) sırasıyla yaklaşık 26 ve 28 olarak belirlenmiştir. Çalışmada ayrıca, COMSOL yazılımında yapılan analizden elde edilen sonuçlar kullanılarak, her iki akış tipi için, belirlenen koşullarda (Reynolds sayısı, Re=250-2000, en-boy oranı, L/D=4-128 ve Schmidt sayısı, Sc=0,68), nemli ve kuru hava taraflarında Sh sayısı için yüksek hassasiyette eşitlikler elde edilmiştir.

Anahtar Kelimeler:

Membran, anülus kanal, kütle transferi, nemli hava

Investigation of The Effect of Membrane on Air-Air Moisture Transfer in Annular Channel and Determination of Mass Transfer Equations

In this study, the effect of the membrane on the moisture transfer between air and air in the annulus channel was investigated, and mathematical modeling was made for moist air-dry air fluids. In parallel and counter flow types of the created model, mass transfer equations were determined and analyzes were performed using COMSOL Multiphysics software. The system was modelled in the MATLAB software with the finite difference method under the same conditions, and the results obtained in the COMSOL software were verified with a low relative error. According to the calculation results, the highest Sherwood number (Sh) was determined as approximately 26 and 28 in parallel and counter flow, respectively. In the study, using the results obtained from the analysis made in the COMSOL software, for both flow types, under the specified conditions (Reynold number, Re=250-2000, aspect ratio, L/D=4-128 and Schmidt number, Sc=0.68), high-precision equations were obtained for the Sh number on the moist and dry air sides.

Keywords:

Membrane, Annulus channel, Mass transfer, Moist air,

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