CFD Analysis of Shell and Tube Heat Exchanger with Flower Type Baffle

Öz

One of the most important factors that influence the thermal and hydraulic performance of shell and tube heat exchangers is the baffle. In this study, a CFD analysis of shell and tube heat exchanger with a flower type baffle was carried out using the ANSYS Fluent program. The objective of the analyses was to investigate the effect of flower type baffle on the shell side heat transfer coefficient, pressure drop and heat transfer rate per pressure drop. In addition, the flower type baffle and the conventional single segmental baffle were compared. Water was used as the working fluid on the shell side of the designed shell and tube heat exchanger. In the analyses, four different mass flow rates (1.2 kg s-1, 1.5 kg s-1, 1.8 kg s-1 ve 2.1 kg s-1) were examined for the fluid on the shell side. According to the results obtained from the study, it was observed that the flower type baffle increased the heat transfer rate per pressure drop compared to the conventional single segmental baffle.

Anahtar Kelimeler

• Flower type baffle
• shell and tube heat exchanger
• CFD

Çiçek Tip Şaşırtma Levhasına Sahip Gövde Borulu Isı Değiştiricinin CFD Analizi

Öz

Gövde borulu ısı değiştiricilerinin ısıl ve hidrolik performansını etkileyen en önemli faktörlerden bir tanesi şaşırtma levhasıdır. Bu çalışmada, ANSYS Fluent programı aracılığıyla, çiçek tip şaşırtma levhasına sahip gövde borulu ısı değiştiricinin CFD analizi yapılmıştır. Analizlerde, çiçek tip şaşırtma levhasının gövde tarafı ısı taşınım katsayısına, basınç düşüşüne ve basınç düşüşü başına düşen ısı transfer oranına etkisini araştırmak amaçlanmıştır. Ek olarak, çiçek tip şaşırtma levhası ile geleneksel tek parçalı şaşırtma levhası karşılaştırılmıştır. Tasarlanan gövde borulu ısı değiştiricinin gövde tarafında çalışma akışkanı olarak su kullanılmıştır. Analizlerde, gövde tarafındaki akışkan için dört farklı kütlesel debi (1.2 kg s-1, 1.5 kg s-1, 1.8 kg s-1 ve 2.1 kg s-1) incelenmiştir. Çalışmadan elde edilen sonuçlara göre, çiçek tip şaşırtma levhasının geleneksel tek parçalı şaşırtma levhasına göre basınç düşüşü başına düşen ısı transfer oranını artırdığı gözlemlenmiştir.

Anahtar Kelimeler

• Çiçek tip şaşırtma levhası
• gövde borulu ısı değiştirici
• CFD

Kaynakça

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