International Journal of Energy Engineering          
International Journal of Energy Engineering(IJEE)
ISSN:2225-6563(Print)
ISSN:2225-6571(Online)
Frequency: Yearly
Editor-in-Chief: Prof. Sri Bandyopadhyay(Australia)
Dehydration of Persimmon by Concentrating Parabolic Trough Solar Air Heater
Full Paper(PDF, 578KB)
Abstract:
Parabolic Trough Solar (PTS) air heater was developed locally to solve the drying of persimmon with a parabolic trough and a drying box which contains a reflected steel sheet, an absorber tube, an angle iron and a fully insulated home script refrigerator. Solar irradiance results were noted for the months of Oct- Dec, 2012. Four air mass flow rates were conducted with one natural flow rate of 0.53 kg minute-1 (M-1) and three convective air mass flow rates of 1.35 kg M-1, 1.87 kg M-1 and 1.97 kg M-1 respectively. The range of temperature for the drying of persimmon was 40-60oC and less than 15% humidity was accomplished through dehydrating time. It was found that air mass flow rates and months of the year would both significantly affect the efficiency of parabolic trough solar air heater for the drying of persimmon. Persimmon slices were dried with a high temperature 55oC and high air flow rate (1.97 kg M-1). It was also noted that during the month of November, the PTS air heater efficiency reached the maximum for the drying of persimmon due to the high air mass flow rate. The study as a whole concludes that PTS plays an important role in the drying of different agricultural products including persimmon in this energy crisis world. The study recommends more researches on the design and efficiency of the PTS air heater, which will help the farmers from losses at the field level and also will utilize the perishable commodity of agriculture during the peak season of the crop matures, and thus the farmers’ overall well-being will be increased.
Keywords:Solar Air Heater; Collector Efficiency; Drying Persimmon
Author: Muhammad Aamir Khan1, Wasiullah Malik2, Muhammad Israr3, Shamsher Ali2, M. Rahman1, M. Ibrahim4, M. Hanif1, Syed Fahad Shah3
1.Department of Agricultural Mechanization, Amir Muhammad Khan Campus Mardan, The University of Agriculture, Peshawar-Pakistan
2.Department of Soil & Environmental Sciences, Amir Muhammad Khan Campus Mardan, The University of Agriculture, Peshawar-Pakistan
3.Department of Rural Development, Amir Muhammad Khan Campus, Mardan, The University of Agriculture, Peshawar-Pakistan
4.Department of Agricultural & Applied Economics, Amir Muhammad Khan Campus Mardan, The University of Agriculture, Peshawar-Pakistan
References:
  1. L. F.Stacy, “Parabolic trough solar collectors: design for increasing efficiency,” Dept. of Mechanical Engi., Ph.D thesis of the Massachusetts Inst. of Tech. U.S., 2011.
  2. R. J. Fuller, T. Lhendup, and L. Aye, Int. Technologies Centre (IDTC), Dept. Civil and Envi. Engi. Uni. Melbourne, Australia, 2005.
  3. Ahmed A. G., “Design and construction of a solar drying system, a cylindrical section and analysis of the performance of the thermal drying system,” Afr. Jr. Agri-Resh., vol. 6, no. 2, pp. 343-351, 2011.
  4. M. J. Brooks, I. Mill, and T. M. Harms, “Performance of a parabolic trough solar collector,” Dept. of Mechanical Engi. Mangosuthu Technikon, Southern Africa, vol. 17, no. 3, 2006.
  5. C. Philibert, “The present and future use of solar thermal energy as a primary source of energy,” Int. Ene. Agency, Pairs, France, 2005.
  6. T. Dikbasan., “Determination of effective parameters for drying of apples,” M.S. thesis, The graduate school of Engi. and Sci. Izmir Inst. Tech., Turkey, 2007.
  7. Ahmad M., Hauser J. C., Heijnen C., and Chaudry M. A., “Solar drying of fruits and vegetables,” Pakistan, J. Agric. Res., pp. 233-244, 2002.
  8. A. A. Hassanain, “Simple solar drying system for banana fruit,” Dept. Agri. Engi.Faculty of Agri, Suez-Canal University, Ismailia, 42552, Egypt, World Jr. Agri.Sci., vol. 5, no.4, pp. 446-455, 2009.
  9. A. L. Marin, “Contributions to the study of heat balance in drying of fruits and vegetables with solar energy,” Proceeding of the Int Conf. BIOATLAS, 2010 Transilvania Uni. Brasor, Romania, 2010.
  10. V. Belessiotis and E. Delyannis, Solar drying, Laboratory of solar & other energy systems, NSRC “DEMOKRITOS”, P.O. box 60228, 153-10, Aghia Paraskevi, Greece, 2010.
  11. F. Ahmad, “Solar radiation studies at Karachi, Pakistan,” Ph.D. Dissertation, Uni. of Karachi, Karachi-Pakistan, 1989.
  12. A. C. Valentina, E. Salomoni, M. Majorana, G. Giannuzzi, A. Militia, and D. Nicolini, “New trends in designing parabolic trough solar concentrators and heat storage concrete systems in solar power plants,” Uni. of Padua, Italy, 2010.
  13. N. Christian and Natowitze, Our Energy Future, A Johan Wiley and Son. INC. Pub. Press, 2009.
  14. S. N. Yadav, Agricultural Engineering Fundamentals and Application, Bio Tech Book Publishers, Delhi. India, 2011.
  15. U. Aswathanarayana, T. Harikrishnan, and K. M. T. Sahini, Green Energy, CRC. Press, Taylor and Frances, Balkem Books Publishers, India, 201.
  16. D. R. Radu, “New trends in designing parabolic trough solar concentrators and heat storage concrete systems in solar power plants,” J. Solar Energy, vol. 12, no. 3, pp. 277-287, 2010.
  17. A. G. Ahmed, “Design and construction of a solar drying system, a cylindrical section and analysis of the performance of the thermal drying system,” Afr. Jr. Agri-Resh, vol. 6, no. 2, pp. 343-351, 2011.
  18. J. C. Ehiem, S. V. Irtwange, and S. E. Obetta, “Design and development of an ind. fruit and vegetable dryer,” Dept. Agri. Engi, Uni.Agri. Umudike, Makurdi, Nigeria.
  19. C. J. Ceankoplis, Transport Process and Unit Operations, 3rd Edition. Prentice hall, Englewood Cliffs, pp. 508-512, 1993.