Drying Characteristics and Mathematical Modeling of Without Pretreatment and Pretreatment Zucchini (Cucurbita Pepo L.) Slices in a Solar Tunnel Dryer

Year 2021, Issue: 27, 575 - 582, 30.11.2021

Sevil Karaaslan , Kamil Ekinci , Barbaros Kumbul

https://doi.org/10.31590/ejosat.984997

Abstract

With/without pretreated zucchini samples were dried in a solar tunnel dryer to determine drying characteristic and modelling. Solar irradiation at ambient, drying air temperature and air velocity at specific intervals in various parts of the dryer were measured. In the study, it was investigated how pretreatment of zucchini affected the drying time, moisture ratio and drying rate of it in solar tunnel dryer. In addition, the data on the drying process were applied to eight different mathematical models (Newton, Page, Henderson and pabis, Logarithmic, Diffusion, Midilli et al., Alibas, Logistic Equation Models). The performance levels of the models compared according to R2, χ2, besides RMSE between moisture ratios that were observed and predicted. Furthermore, considering all selected models, Midilli et al. and Alibaş model equations gave the highest R2, the lowest χ2 and RMSE values and were found to reveal the ratio of drying in a satisfactory way for all the methods of drying.

Keywords

Solar tunnel dryer, Zucchini, Mathematical modelling

Ön İşlemsiz ve Ön işlemli Kabak (Cucurbita Pepo L.) Dilimlerinin Tünel Tipi Güneşli Kurutucuda Kurutma Özellikleri ve Matematiksel Modellemesi

Abstract

Ön işlemsiz ve ön işlemli kabak örnekleri, kurutma karakteristiği ve modellemeyi belirlemek için tünel tipi güneş enerjili kurutma yöntemi kullanılarak kurutulmuştur. Araştırmacılar, kurutucunun çeşitli bölümlerinde belirli aralıklarla ortam ve kurutma havası sıcaklıklarında ve hava hızında güneş ışınımını ölçmüştür. Çalışmada, güneş enerjisiyle kurutmanın ön işlemsiz ve ön işlemli kabak örneklerinin kuruma süresini, nem oranını ve kuruma hızını nasıl etkilediği araştırılmıştır. Ayrıca kurutma işlemine ilişkin veriler, Newton, Page, Henderson ve pabis, Logaritmik, Difüzyon, Midilli ve ark. Alibas, Lojistik isimli 8 farklı matematiksel modele uygulanmıştır. Araştırmacılar, modellerin performans düzeylerini korelasyon katsayısı (R2), ki-kare değeri (χ2) ve gözlemlenen ve tahmin edilen nem oranları arasındaki ortalama hata karesi (RMSE) ile karşılaştırmışlardır. Ayrıca, seçilen tüm modeller dikkate alındığında Midilli ve ark. ve Alibaş model denklemleri en yüksek R2, en düşük χ2 ve RMSE değerlerini vermiş ve tüm kurutma yöntemleri için kuruma oranını tatmin edici bir şekilde ortaya koyduğu bulunmuştur.

Keywords

Tünel tipi güneşli kurutucu, Kabak, Matematiksel modelleme

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