کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
301595 512510 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis and performance of a low-cost solar heater
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Analysis and performance of a low-cost solar heater
چکیده انگلیسی

One of the alternatives to reduce the consumption of electricity for heating water is by popularizing the use of solar energy. This work contributes with studies on a Low-Cost Solar Heater (LCSH), a new concept of solar water heater made entirely of polymeric materials, which requires a relatively low investment and is user-assembled. The solar collector, which absorbs solar energy and transfers it to water in the form of heat, is composed of uncovered flat panels of rigid PVC. The storage tank that holds the water heated during the day is made of polyethylene coated with polystyrene. The results of the LCSH were compared with those of a conventional solar heater composed of a glass-covered copper collector and a stainless steel storage tank. The efficiency of the systems was evaluated by measuring the incident solar radiation and water temperature with the systems operating naturally (thermosiphon). The heat loss in the hot water storage tanks was measured to estimate the thermal performance of the solar heaters. Considering that the target temperature for the heated water is slightly above the ambient temperature, the results indicated that the LCSH showed a satisfactory global heat transfer coefficient for storage tanks and that it attained an excellent thermal performance, although it is not as efficient as the conventional heater.


► The LCSH storage tank showed low heat loss to the environment.
► The Global Heat Exchange Coefficients value found is considered satisfactory.
► The LCSH presented a good thermal performance in terms of temperature attained.
► The uncovered solar collector presented considerable variations in temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 36, Issue 9, September 2011, Pages 2538–2546
نویسندگان
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