توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Parametric Analysis on Heat Removal Factor for a Flat Plate Solar Collector of Serpentine Tube
اطلاعات انتشار: World Applied Sciences Journal، بيست و نهم،شماره۲، ۲۰۱۴، سال
تعداد صفحات: ۴
The photovoltaic thermal (PVT) is a device that can produce electric and thermal energiessimultaneously. The main components of PVT consist of the photovoltaic module, absorber collector, insulator and mounting frame. The design of the absorber collector is crucial in the good performance of thermal energy. The heat removal factor FR, which is the ratio of the actual energy gain to the useful energy gain of a collecter when the entire collector surfaces are at the fluid inlet temperature, is one of the key parameters in determining the thermal efficiency of PVTs. A high FR means large thermal efficiency and losses and vice versa. In this study, the heat removal factor of four serpentine tubes with varying dimensions and profiles is analyzed. The rectangle tube shows the highest FR (0.93). This high FR value could be caused by the small diameter of the rectangle tube. In addition, a high number of tubes enhance the heat transfer between photovoltaic and serpentine collector absorber.

۲The Effects Ofthermal Conductivityon Photovoltaic Thermal Collector Sheet in Tube Type
اطلاعات انتشار: World Applied Sciences Journal، سي و يكم،شماره۴، ۲۰۱۴، سال
تعداد صفحات: ۵
Photovoltaic thermal is the device produced heat and electricity simultaneously. Consisted of photovoltaic module, collector, insulator in a single unit made the efficiency based on varied factors. For the thermal efficiency, the collector of the PVT is the crucial factor in determined a good results. In this study, the polymer and aluminum collector have been investigated to see the effect of the fin efficiency and collector efficiency factor. Knowing the fin efficiency and collector efficiency factor will be increase with the high thermal conductivity, this study observed the varied dimensions and gaps of tubes. The selected diameters were 6 mm, 12 mm and 18 mm and the gaps from 1 to 10 mm. It clearly showed the higher collector efficiency factor obtained for very small gaps for polymer. The increment width of tubes reduced the collector efficiency factor for both materials. The polymer collector reduce tremendously compared the aluminum collector. The efficiency collector factor for polymer and aluminum approximately 0.75 to 0.97 and 0.96 to 0.98 respectively. Therefore, to obtain the characteristics of polymer material such as light, cost effective and manufacturability, the small gaps of tubes can be implement as a collector without ignored the efficiency collector factor.
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