Hava Akışkanlı Güneş Kollektöründe Isı Transferi İyileştirmesine Etki Eden Parametrelerin Taguchi Metodu ile Optimizasyonu

Bu çalışmada, yutucu yüzeyi üzerinde farklı geometriye sahip kanatçıklar bulunan hava akışkanlı güneş kollektörlerinde ısı transferine (Nusselt sayısı) etki eden parametrelerin optimizasyonu için Taguchi metodu kullanılmıştır. Deney parametresi olarak dört farklı Reynolds sayısı (Re=3150, 3800, 4400 ve 5000), iki farklı kanatçık tipi (Tip-I ve Tip-II) ve iki farklı kollektör eğim açısı (α=25° ve 40°) belirlenmiştir. Üç farklı deney parametresi olan Reynolds sayısı, kollektör eğim açısı ve yutucu yüzey kanatçık tipinin kollektörün ısı transferine olan etkileri incelenmiştir. Taguchi metodu kullanılarak elde edilen L8 (41x22) dikey deney dizilimi ile ısı transferinin maksimum olması için gerekli olan optimum deney dizilimi tespit edilmesi amaçlanmıştır. En yüksek Nu sayısı değeri için optimum deney dizilimi A4B2C1(Re=5000, Tip-II, α=25°) olarak elde edilmiştir. Her bir deney parametresinin ısı transfer miktarına olan etkilerinin analizi için ANOVA yöntemi kullanılmıştır. Kullanılan deney parametrelerinden deney sonucuna en yüksek etki eden parametre %73,77 ile Re sayısı olarak bulunmuştur.

Anahtar Kelimeler:

Güneş kollektörü, Isı transferi, Taguchi metodu, ANOVA

Optimization of the Parameters Affecting the Heat Transfer Enhancement on the Solar Air Collector with Taguchi Method

In this study, Taguchi method was used to optimize the parameters that are related to the heat transfer (Nusselt number) of solar air collectors having different geometry fins on the absorber surface. Four different Reynolds numbers (Re=3150, 3800, 4400 ve 5000), two different fin types (Tip-I and Tip-II) and two different tilt angles (α=25° and 40°) were determined as test parameters. The effects of Reynolds number, collector tilt angle, and absorber surface flap type on heat transfer of the collector were investigated. The L8 (41x22) orthogonal test sequence obtained by using the Taguchi method was aimed to determine the optimum experimental sequence required for maximum heat transfer. The optimum experimental sequence for the highest Nu number was obtained as A4B2C1 (Re = 5000, Type-II, α = 25°). ANOVA method was used to analyze the effects of each experimental parameter on the heat transfer amount. The most effective parameter was Re number with 73.77% of the experimental results.

Keywords:

Solar air heater, heat transfer, taguchi method, ANOVA,

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