کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1550713 998104 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solar-heated rotary kiln for thermochemical energy storage
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Solar-heated rotary kiln for thermochemical energy storage
چکیده انگلیسی

Thermal energy storage (TES) will improve the efficiency and output of solar power plants. TES based on thermochemical cycles is an interesting option as thermochemical cycles can provide high energy storage densities and allow longer heat storage time. The use of multivalent solid oxide reduction–oxidation (REDOX) reactions for thermochemical heat storage is a promising option. Several concepts are feasible for coupling solar energy to the redox reaction. Among those a directly irradiated rotary kiln is one of the most interesting because it is able to provide high mass flow rates and high amounts of active material. A solar-heated rotary kiln was set-up and operated in the solar furnace of DLR for thermal reduction and oxidation of cobalt oxide. The redox material was fed into the reactor batch wise and reduced on-sun at temperatures of about 900 °C and re-oxidized off-sun in the same rotary kiln. Both steps were carried out in an air atmosphere. Thirty cycles were performed with one batch showing no evident degradation of the material. The results confirm that the rotary kiln is a feasible reactor set-up for the solar reduction of metal oxides and, hence, for thermochemical energy storage.


► Two-step thermochemical cycle for thermal energy storage.
► Test operation of a solar-heated rotary kiln for reduction of metal oxide.
► Reduction of cobalt oxide at about 900 °C.
► Feasibility of thermal reduction of cobalt oxide in a solar rotary kiln was proven.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 86, Issue 10, October 2012, Pages 3040–3048
نویسندگان
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