Abstract
Thermosyphons and heat pipes offer great opportunities for creating pas sive heat and mass transfer systems. Various design solutions using heat pipes (thermosyphons) in solar energy systems are known. Solar energy is one of the promising energy sources, a step towards reducing dependence on other energy resources. To date, there is already an industrial production of solar collectors based on thermosyphons (heat pipes). In solar collectors, the use of thermosyphons (heat pipes) makes it possible to simplify the assembly of the structure, ensures its high modularity, maintainability and reliability. In the course of research, the authors have developed and justified the design of a solar collector based on thermosyphons fixed on panels that absorb solar rays. In order to analyze the efficiency of the solar collector based on two-phase copper thermosyphons, two models of solar collectors were created, viz. the one with a flat absorbing panel and the one with a cylindrical absorbing panel. The areas of the absorbing surfaces were the same. Both models were studied by the method of thermophysycal experiment. The results of studies of the effectiveness of the above-mentioned solar collectors have been obtained. The efficiency of the solar collector based on a copper two-phase thermosyphon, which is fixed on a cylindrical absorbing panel is 2–5 % more than the efficiency of the solar collector based on a copper two-phase thermosyphon, which is fixed on a flat absorbing panel. The maximum efficiency value obtained at low initial water temperatures for solar collectors with a cylindrical and flat absorbing surface was 60 %.
Highlights
There is already an industrial production of solar collectors based on thermosyphons
The use of thermosyphons makes it possible to simplify the assembly of the structure, ensures its high modularity, maintainability and reliability
In the course of research, the authors have developed and justified the design of a solar collector based on thermosyphons fixed on panels that absorb solar rays
Summary
1)Национальный технический университет Украины «Киевский политехнический институт имени Игоря Сикорского» (Киев, Украина). Белорусский национальный технический университет, 2020 Belarusian National Technical University, 2020. Известны различные конструктивные решения с использованием тепловых труб (термосифонов) в солнечных энергетических системах. Сегодня уже существует промышленное производство солнечных коллекторов на основе термосифонов (тепловых труб). Использование термосифонов (тепловых труб) упрощает сборку конструкции, обеспечивает ее высокую модульность, ремонтопригодность и надежность. В процессе исследований авторами разработана и обоснована конструкция солнечного коллектора на основе термосифонов, закрепленных на панелях, поглощающих солнечные лучи. Для анализа эффективности работы солнечного коллектора на основе медных двухфазных термосифонов были изготовлены два макета – с плоской и цилиндрической поглощающими панелями. Максимальное значение КПД, полученное при низких начальных температурах воды, для солнечных коллекторов с цилиндрической и плоской поглощающими поверхностями – 60 %. И. Солнечные коллекторы на основе медных двухфазных термосифонов / В. 1)National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” (Kyiv, Ukraine)
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