Results of research into thermal-technical characteristics of solar collector
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 5, Issue 8
Abstract
<p>We developed a new design of an air solar collector made in the form of an inseparable power unit, which includes a frame with heat-insulated walls, single glazing and a selective surface on its bottom. We defined a number of generalizing dependences for the determination of thermal efficiency of an air solar collector, namely, an influence of the mass air flow q<sub>a</sub> on a temperature difference of the heat-transfer agent t<sub>o</sub> and insulation E, on heat productivity q and the efficiency η of the solar collector.</p><p>Based on the experimental data, we obtained linear regression dependencies of the average daily ambient temperature t<sub>eat</sub> on energy illumination E and the average temperature of the heat-transfer agent carrier t<sub>aat</sub> of the average daily ambient temperature t<sub>eat</sub>. We verified the adequacy of the results of theoretical and experimental studies.</p><p>We established that we achieve the maximum values of the efficiency of the solar collector η ‒ from 65 to 80.6 % at a temperature of the outlet flow of the heat-transfer agent t<sub>o</sub> from 30 to 60 °C and mass air flow, q<sub>a</sub> from 170 to 190 m<sup>3</sup>/h.</p><p>We determined that an increase in the level of insulation E from 100 to 1,000 W/m<sup>2</sup> makes it possible to increase heating productivity of the collector q from 320 to 1,260 W and the temperature of the heat-transfer agent at the collector outlet t<sub>o</sub> from 10 to 60 °C.</p><p>We can use the obtained results in development and improvement of technical means for drying fruits, for improvement of technological and energy efficiency of the process.</p>
Authors and Affiliations
Vitaliy Boyarchuk, Sergiy Korobka, Mykhailo Babych, Roman Krygul
Keywords
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- EP ID EP528202
- DOI 10.15587/1729-4061.2018.142719
- Views 74
- Downloads 0
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