| Autor: |
Бошкова, І. Л., Волгушева, Н. В., Бошков, Л. З., Потапов, М. Д. |
| Předmět: |
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| Zdroj: |
Refrigeration Engineering & Technology; 2022, Vol. 58 Issue 3, p156-163, 8p |
| Abstrakt: |
The conversion of solar energy into thermal energy is characterized by high efficiency, environmental friendliness and is economically beneficial. The energy of the Sun's radiation is converted into heat energy in a device called a solar collector. Solar collectors differ from other types of heat exchangers by low densities of heat flows. Modern ideas about methods of increasing the efficiency of the design of a flat solar collector are analyzed. It has been established that it is rational to consider the construction of a solar collector with the arrangement of pipes on the surface of the absorbing plate and under one transparent coating of tempered glass. The method of calculating a flat solar collector is based on mathematical representations of heat transfer processes, taking into account dependencies for calculating efficiency. The main elements of a flat solar collector involved in the technique are: a surface (plate) that absorbs the energy of solar radiation and transfers it to the liquid; pipes in which heated liquid flows; coatings transparent to solar radiation placed over the absorbing surface and reducing heat loss to the atmosphere due to convection and radiation; thermal insulation. The given technique was tested during the construction of a flat solar collector for the climatic conditions corresponding to the Odesa region. Calculations were carried out assuming a stationary mode of operation of the collector. As a result of the basic calculation under the most unfavorable conditions, the geometric characteristics of the collector were obtained. The surface area of the collector obtained as a result of such a calculation is the basis for determining its operating characteristics in other conditions. Calculations are made for the conditions of January as the coldest month and July as the hottest. Variation calculations make it possible to determine the conditions for reducing heat losses and increasing the efficiency of the collector. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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