Exergy analysis of the operation of a solar dryer
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 2, Issue 8
Abstract
<p class="2">The study considers the exergy analysis of rational ways to use and store thermal energy in a solar dryer in order to increase the exergy efficiency of the technological process of fruit drying at individual farms.</p><p class="2">We analyzed the application of solar energy for the technological process of fruit drying in individual farms based on an exergy analysis of a solar dryer operation. We carried out full-time tests of a solar dryer at the latitude of the location of Rivne oblast (Ukraine), which has an average annual solar power of 3.41 kW·h/m<sup>2</sup> per day. Therefore, this makes it possible to obtain from 74.8 to 123.1 MJ of solar energy per day from 1 m<sup>2</sup> of an air collector area.</p><p class="2">We improved the procedure of an exergy analysis of operation of a solar dryer, which is based on the simplified mechanism of calculation of an exergy balance of a plant depending on physical parameters of the environment relative specific territory of a farm.</p><p>The performed complex of calculation-quantitative studies confirmed the possibility of significant intensification of fruit drying process in a solar dryer. We established that heat losses during fruit drying in a solar dryer make up 3...3.7 MJ/kg, and the degree of intensification increases by 3.3...12 times. The exergy efficiency of a solar dryer without the use of a thermal battery is 87.6 %; with it – 89.8 % with the use of a thermal battery. The exergy efficiency of a solar dryer increases by 1.02 times. We achieved such results by using a flat mirror concentrator and a thermal battery in a solar dryer.</p><p>An applied aspect of using the results obtained is the possibility to increase the energy efficiency of fruit drying process based on exergy express-analysis of the efficiency of a solar dryer. It will reduce the cost of energy resources by using solar energy. It creates a prerequisite for the transfer of technological solutions for justification of exergy balances for various characteristics of fruit drying process in a solar dryer.</p>
Authors and Affiliations
Sergiy Korobka, Nataliya Tolstushko, Victor Zaharchuk, Mykola Tolstushko
Keywords
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- EP ID EP527901
- DOI 10.15587/1729-4061.2018.126290
- Views 82
- Downloads 0
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