Substantiation of the effectiveness of using a flat mirror concentrator in the solar dryer

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.112206

Keywords:

solar energy, fruit solar dryer, mirror concentrator, receiving surface, air collector

Abstract

We propose a procedure for calculating geometrical parameters of a flat mirror concentrator of solar energy. The procedure describes construction of the path of rays between the mirror and the collector in the form of a system of degree coordinates α. We obtained analytical dependences for the course of illumination of air collector by the sum of direct and reflected flows Еβ(τ) and a flow gain coefficient k. This makes it possible to estimate efficiency of a flat mirror concentrator for different azimuthal angles of orientation of parameters of the horizontal receiving surface of air collector S and the system of degree coordinates α.

The rational values for a dihedral angle (focline) α between the mirror and the collector are established, which are 90...120º. It was found that a gain coefficient of the flow of solar energy k is implemented with the least expenditures from 1.8 to 1.2.

We report results of experimental research into energy characteristics of work of the mirror concentrator in a combination with an air collector. It was established the application of a mirror concentrator in the solar dryer makes it possible, in the morning and in the evening, to improve annual average capacity of incoming solar radiation on the receiving surface of air collector by an order of 3.41 kW/m2 during daylight. This enables receiving, amplifying, and directing to the absorber of AC from 1.5 to 2.3 kW·h of energy per day from 1 m2 of FMC.

The results obtained could be used for design and improvement of technical means of drying, in order to enhance technological and energy efficiency of the process. 

Author Biographies

Jaroslaw Knaga, University of Agriculture in Krakow Adama Mickiewicza lane, 21, Krakow, Poland, 31-120

Doctor of Technical Sciences

Department of Power Engineering and Automation of Agricultural Processes 

Andriy Tatomyr, Lviv National Agrarian University Volodymyra Velykoho str., 1, Dublyany, Ukraine, 80381

PhD

Department of Energy

Mykhailo Babych, Lviv National Agrarian University Volodymyra Velykoho str., 1, Dublyany, Ukraine, 80381

PhD

Department of Energy

Serhiy Korobka, Lviv National Agrarian University Volodymyra Velykoho str., 1, Dublyany, Ukraine, 80381

PhD, Senior Lecturer

Department of Energy

References

  1. Atyhanov, A. K. (2010). Klassifikaciya sushil'nyh ustanovok s ispol'zovaniem solnechnoy energii. Adaption of innovation technologies and forms of international collaboration in agrarian education. International conference’s reports, 9, 95–112.
  2. Khazimov, K. M., Bora, G. C., Urmashev, B. A. (2014). Computation of technological and structural parameters of solar dryer by calculation experiment. IJEIT – India, 32, 258−268.
  3. Bilgen, E., Bakeka, B. J. D. (2008). Solar collector systems to provide hot air in rural applications. Renewable Energy, 33 (7), 1461–1468. doi: 10.1016/j.renene.2007.09.018
  4. Kupreenko, A. I., Isaev, H. M., Baydakov, E. M. (2008). K raschetu neobhodimoy ploshchadi geliokoletektora barabannoy zernosushilki. Vestnik Bryanskoy gosudarstvennoy sel'skohozyaystvennoy akademii, 3, 37−41.
  5. Kassymbayev, B. M., Atykhanov, A. K., Karaivanov, D. P. et. al. (2014). Method of calculation solar radiation intensity and its application in solar dryers-greenhouses for production of fruits and vegetables. Life Science Journal, 11 (10), 687–689.
  6. Ermuratskiy, V. V., Ermuratskiy, V. V., Ermuratskiy, P. V. (2008). Effektivnost' primeneniya ploskih reflektorov v gelioustanovkah. Problemy regional'noy energetiki, 46−51.
  7. Khazimov, Z. M., Bora, G. C., Khazimov, K. M., Khazimov, M. Z. (2014). Modeling of the motion of free convective drying agent in plastic helio dryer. Journal of Engineering Thermophysics, 23 (4), 306–315. doi: 10.1134/s1810232814040080
  8. NASA Surface meteorology and Solar Energy. Available at: http://eosweb.larc.nasa.gov/cgibin/sse/grid/cgi?uid=3030
  9. Kituu, G. M., Shitanda, D., Kanali, C. L., Mailutha, J. T., Njoroge, C. K., Wainaina, J. K., Silayo, V. K. (2010). Thin layer drying model for simulating the drying of Tilapia fish (Oreochromis niloticus) in a solar tunnel dryer. Journal of Food Engineering, 98 (3), 325–331. doi: 10.1016/j.jfoodeng.2010.01.009
  10. Janjai, S., Phusampao, C., Nilnont, W., Pankaew, P. (2014). Experimental performance and modeling of a greenhouse solar dryer for drying macadamia nuts. International Journal of Scientific & Engineering Research, 5 (6), 1155−1161.
  11. Korobka, S., Babych, M. (2017). Substatiation of the constructive-technologocal parameters of a solar fruit dryer. Eastern-European Journal of Enterprise Technologies, 1 (8 (85)), 13–19. doi: 10.15587/1729-4061.2017.90299
  12. Babych, M., Korobka, S., Skrynkovskyy, R., Korobka, S., Krygul, R. (2016). Substantiation of economic efficiency of using a solar dryer under conditions of personal peasant farms. Eastern-European Journal of Enterprise Technologies, 6 (8 (84)), 41–47. doi: 10.15587/1729-4061.2016.83756

Downloads

Published

2017-10-30

How to Cite

Knaga, J., Tatomyr, A., Babych, M., & Korobka, S. (2017). Substantiation of the effectiveness of using a flat mirror concentrator in the solar dryer. Eastern-European Journal of Enterprise Technologies, 5(8 (89), 10–15. https://doi.org/10.15587/1729-4061.2017.112206

Issue

Vol. 5 No. 8 (89) (2017): ENERGY-SAVING TECHNOLOGIES AND EQUIPMENT

Section

Energy-saving technologies and equipment

License

Copyright (c) 2017 Jaroslaw Knaga, Andriy Tatomyr, Mykhailo Babych, Serhiy Korobka

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.

A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.