Yazar "Sonmete, Mehmet Hakan" seçeneğine göre listele
Listeleniyor 1 - 5 / 5
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Determination of Natural Flow Rates of Some Chickpea Varieties on Different Surfaces and Surface Angles(Selçuk Üniversitesi, 2021) Çiftçi, Yusuf; Dokumacı, Keziban Yalçın; Sonmete, Mehmet HakanIn this study, some physical properties of Gökçe chickpea (registered variety) and Spanish chickpea (local population) variety cultivated in Konya Province were determined. Flow rates of chickpea varieties were detected at four different conveyor channel angles (24°, 28°, 32° and 36°) and on three different surfaces (galvanized sheet, painted sheet and steel sheet surfaces). Length, width, thickness, geometric mean diameter, sphericity, repose angle, thousand grain weight, bulk density values of Gökçe chickpeas at 8.90% moisture level are 10.09 mm, 7.34 mm, 7.74 mm and 8.30 mm, 0.82, 18.04°, 364.6 g and 746.82 kg m-3 and for Spanish variety at 10.40% moisture level are 12.16 mm, 8.22 mm, 9.01 mm, 9.65 mm, 0.79, 16.01°, 481.96 g, 690.21 kg m-3 were determined respectively. These varieties, the static friction coefficient values on galvanized sheet, painted sheet and steel sheet surfaces were found to be 0.335 and 0.351, 0.401 and 0.445, 0.388 and 0.435, respectively. Flow rates increased as the channel conveyor angle increased on galvanized sheet, painted sheet and steel sheet surfaces. The increase rates for Gökçe and Spanish chickpeas on these surfaces were 207% and 189%, 630% and 522%, 291% and 202%, respectively. When the surface averages are taken into account, average flow rates of 1.69 kg s-1 on the galvanized sheet surface, 1.24 kg s-1 on the painted sheet surface and 1.54 kg s-1 on the steel sheet surface were obtained and found to be statistically significant. The difference between the surfaces is due to the roughness values of the surfaces. The lowest average roughness value was found on the galvanized sheet surface (1.13 µm), and the highest on the painted surface (2.06 µm). According to the triple interaction results, the highest flow rate value was obtained on the galvanized sheet surface and the conveyor angle of 36° in both chickpea varieties, and the lowest flow values were obtained at the conveyor angle of 24° on the painted sheet surface.Öğe The effects of drying parameters on drying characteristics, colorimetric differences, antioxidant capacity and total phenols of sliced kiwifruit(SPRINGER, 2019) Mengeş, Hakan O.; Ünver, Ahmet; Özcan, Mehmet Musa; Ertekin, Can; Sonmete, Mehmet HakanThe influence of drying parameters on drying characteristics, colorimetric differences, antioxidant capacity and total phenols of sliced kiwifruit were researched. The kiwi fruits dried between 2.6h and 12.1h for different drying conditions. Total phenol content of dried fruits were ranged from 2.03-2.71mg GAE/L. Free radical scavenging activity were varied from 26.04% to 40.91%. The effect of different drying temperatures were not very effective on the total phenol content of kiwi fruits. But, the free radical scavenging activity were variable. While L* value were in the range of 51.41 and 72.90, the a* value were ranged between -8.22 and 3.47 and the b* value between 22.24 and 40.37. The most suitable model is Midilli etal. model with low RMSE, reduced chi-square and high modeling efficiency values. While the effective diffusivity ranged between 2.63x10(-10) and 1.29x10(-9)m(2).s(-1), the activation energy was between 28.51 and 34.16kJmol(-1).Öğe Evaluation of Global Solar Radiation Models for Konya, Turkey(Pergamon-Elsevier Science Ltd, 2006) Menges, Hakan Okyay; Ertekin, Can; Sonmete, Mehmet HakanSolar radiation data are required by solar engineers, architects, agriculturists and hydrologists for many applications such as solar heating, cooking, drying and interior illumination of buildings. In order to achieve this, several empirical models have been developed to predicted the solar radiation all over the world. The main objective of this study is to review the global solar radiation models available in the literature. In order to evaluate the applicability of 50 models for computing the monthly average daily global radiation on a horizontal surface, the geographical and meteorological data of Konya, Turkey (37 degrees 52'N latitude, 32 degrees 29'E longitude) was used. The models were compared on the basis of statistical error tests such as the percentage error (e), mean percentage error (MPE), root mean square error (RMSE), mean bias error (MBE), regression coefficient (R) and Nash-Sutcliffe equation (NSE). According to the results, the Ertekin and Yaldiz model showed the best estimation of the global solar radiation on a horizontal surface for Konya, Turkey, by means of the MPE (0.004266%), RMSE (0.022576 MJ/m(2)), MBE (0.000000 MJ/m(2)), R (0.999993) and NSE (0.999985) statistical tests: H = 20.296019 - 0.096134H(0) + 0.3175936 - 0.146422RH + 10.705159 (S/S-0) -0.288332T + 0.021331TS + 0.359791C + 0.207588P - 0.076444E.Öğe Fasulyenin hasat-harman mekanizasyonu ve geliştirme olanakları(Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2006-09-22) Sonmete, Mehmet Hakan; Demir, FikretBu araştırmada, kuru fasulye hasadında, yoğun işgücü gerektiren elle hasat dışındaki farklı yöntemlerin geliştirilmesi amaçlanmıştır. Bu amaçla, fasulye hasat- harmanı için üç farklı yöntem kullanılmış ve bu yöntemler iki farklı yerel fasulye popülasyonunun (Kanada ve Sarıkız) yetiştirildiği tarlalarda denenmiştir. I.Yöntem: Elle yolma, öbek yapma, harman makinası ile harmanlama. II.Yöntem: Çift bıçaklı çayır biçme makinası ile biçme, öbek yapma, harman makinası ile harmanlama. III.Yöntem: Prototip hasat-harman makinası ile hasat ve harmanlama. Bu yöntemlerdeki işgücü tüketimi, iş verimi, toplam tane kayıpları, enerji tüketimleri ile bitkinin mekanizasyona yönelik bazı özellikleri belirlenmiştir. Sonuç olarak, Kanada ve Sarıkız fasulye popülasyonlarında sırasıyla I.Yöntemde toplam tane kayıpları %9.029 ve %6.955, toplam tüketilen enerji 2121.81 MJ/ha ve 1866.41 MJ/ha bulunmuştur. II.Yöntemde bu değerler sırasıyla % 25.279 ve %22.301, 1087.73 MJ/ha ve 1050.25 MJ/ha'dır. III.Yöntemde ise % 19.380 ve %18.006, 873.76 MJ/ha ve 868.33 MJ/ha olarak bulunmuştur.Öğe Mathematical modeling of thin layer drying of carrot slices by forced convection(SPRINGER, 2017) Sonmete, Mehmet Hakan; Mengeş, Hakan Okyay; Ertekin, Can; Özcan, Mehmet MusaThe aim of this study is to evaluate the effect of drying air temperature, velocity and slice thickness on thin layer drying model of carrot slices. A laboratory dryer was used for thin layer carrot drying process and moisture ratio values (MR) for any drying time were compared using 14 different models, i.e., Newton, Page, Modified Page I and II, Henderson and Pabis, Logarithmic, Two term, Two term exponential, Wang and Singh, Thompson, Diffision approximation, Verma et al., Modified Henderson and Pabis and Midilli et al. models. Root mean square error (RMSE), reduced Chi square (chi(2)) and modeling efficiency (EF) were used as statistical parameters to determine the most suitable model among them. The effects of drying parameters on the best suited drying model coefficients were than determined with linear, logarithmic, power exponential and Arhenius type equations. According to the results, moisture ratio values could be predicted by the Midilli et al. model with high accuracy. It is also possible to predict the moisture content of the product with a generalized model showing the effect of the drying air temperature, velocity and slice thickness with the range of 55-75 degrees C, 2.0-3.0 m s(-1) and 3-9 mm, respectively.
