کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
624929 1455412 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal analysis of a weir-type cascade solar still integrated with PCM storage
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Thermal analysis of a weir-type cascade solar still integrated with PCM storage
چکیده انگلیسی

A weir-type cascade solar still, integrated with latent heat thermal energy storage system, was designed with the view of enhancing productivity. Use of a heat storage system with 18 kg mass (2 cm thickness) of paraffin wax beneath the absorber plate keeps the operating temperature of the still high enough to produce distillated water during the lack of sunshine, particularly at night. Also, theoretical models were developed for the still with and without PCM, and the calculated results were compared with the experimental data. In addition, the internal convective heat transfer coefficient calculated from the experimental data of the still without PCM was applied for the calculations since the common relation proposed by Dunkle could not follow the still performance. Moreover, important parameters affecting the performance of the still, such as water level on the absorber plate and distance between water and glass surfaces, were theoretically investigated. The performance of the still with and without PCM was also studied on a typical day in Zahedan, Iran. In this regard, the daily productivity was theoretically found to be 6.7 and 5.1 kg/m2day, for the still with and without PCM, respectively. The results showed that the productivity of the still with PCM was theoretically 31% higher than that of without PCM.


► A newly designed solar still with built-in PCM storage was constructed and modeled.
► A fit calculated convective heat transfer coefficient between the water and glass surfaces is used for the still modeling.
► The common correlations like Dunkle, a well-known relation, could not satisfy the thermal behavior of the designed still.
► Various effective parameters which have not been considered by others are studied on the still productivity theoretically.
► The productivity of the still with PCM is higher than that of the still without PCM.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 279, Issues 1–3, 15 September 2011, Pages 415–422
نویسندگان
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