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  • Küçük Resim
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    Energy Analysis of a New Design of a Photovoltaic Cell-Assisted Solar Dryer
    (Taylor & Francis Inc, 2013) Ceylan, İlhan; Kaya, Metin; Gürel, Ali Etem; Ergün, Alper
    In this study, a new type of solar dryer was designed and manufactured. This new solar dryer is composed of a heat pipe collector, a drying chamber, a load cell, an air circulation fan, photovoltaic cells (PvC), batteries, and halogen lamps. In this experimental study, tomatoes were used to test the drying process. The drying air was heated by the heat pipe collector and forced through the tomatoes by a blower fan during the daytime. The photovoltaic cells, which were used to run the fan, were also used to charge the batteries during the day. These charged batteries were used for running the halogen lamps during the night, when the halogen lamps were used to heat the drying-air-assisted photovoltaic cells. During the drying period, the drying air temperature, relative humidity, air flow rates, solar radiation, and loss of mass were measured in the solar dryer. Then, the measured data were used for energy analysis.
  • Küçük Resim
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    Modeling of PV System Supported Intelligent Irrigation System in Iraq-Mosul Region
    (Düzce Üniversitesi, 2024) Alhilo, Karam Wadhah Hameed; Kaya, Metin
    Bu çalışmada, fotovoltaik hücrelerin ürettiği elektriği kullanan akıllı bir sulama sistemi oluşturmak için Matlab/Simulink programı kullanılmıştır. Çiftliğin periyodik sulama döneminde 90.000 litre su ihtiyacı olduğu düşünülerek sistem kurulumu gerçekleştirilecektir. Tasarımı gerçekleştirilecek olan sulama sistemi Irak’ın Musul kırsal kesiminde kurulumu gerçekleştirilecektir. Yapmış olduğumuz hesaplamalara göre 1400 W gücünde BLDC model fotovoltaik sisteme uyumlu, 200 m su basma yüksekliğine sahip dalgıç pompa yeterli olmaktadır. Akıllı sulama sistemi kullanılmasının geleneksel sulama sistemlerine göre daha verimli ve ekonomik olduğu gözlemlenmiştir. 1400 W gücünde BLDC model dalgıç pompa tasarımından yaklaşık %36, fotovoltaik dizi tasarımından %67’lik bir tasarruf sağlanmıştır. Irak, konumu gereği yıllık güneş ışınım değeri yüksel olan ülkelerden biridir. Biz bu çalışmamızda elektrik enerji ihtiyacı fazla olan fakat ihtiyacı karşılama oranı düşük olan bölgeler için akıllı sulama sistem modelinin kullanılmasının ülke ekonomilerine katkı sağlayacağını düşünüyoruz.
  • Küçük Resim
    Öğe
    Performance analysis of using CuO-Methanol nanofluid in a hybrid system with concentrated air collector and vacuum tube heat pipe
    (Pergamon-Elsevier Science Ltd, 2019) Kaya, Metin; Gürel, Ali Etem; Ağbulut, Ümit; Ceylan, İlhan; Çelik, Selim; Ergün, Alper; Acar, Bahadır
    An experimental study was conducted to determine the effects of adding copper oxide (CuO) with 50 nm diameter into neat methanol (CH3OH) on the energetic and exergetic analysis of a concentrated air collector with vacuum tube heat pipe at different air velocities (1, 2 and 3 m/s). The experimental results clearly indicated that the nanofluid application enhanced the thermal properties and provided better performance for heat pipe applications. Considering all air velocities together, the average efficiency for neat methanol and CuO-Methanol nanofluid was achieved by 65% and 64%, respectively. Additionally, the average specific exergy outlet values for neat methanol and CuO-Methanol nanofluid were calculated as 206 J/kg and 298 J/kg, respectively. In the experiments, it is seen that the efficiency values of the system using the CuO-Methanol nanofluid reached higher values, as the solar radiation values were higher. In conclusions, this paper distinctly suggests that the presence of copper oxide in the base fluid can be used in a concentrated air collector with vacuum tube heat pipe particularly at the high radiation conditions and positively affects the performance of the system.