Performance of Prototype Solar Tunnel Drier Developed by University of Hohenheim Under Local Environmental Conditions in Sri Lanka

  • Amunugoda P.N.R.J Food Technology Section, Industrial Technology Institute, No 503/A, Halbarawa Gardens, Thalahena, Malabe, Sri Lanka
  • Wilson Wijeratnam R.S Food Technology Section, Industrial Technology Institute, No 503/A, Halbarawa Gardens, Thalahena, Malabe, Sri Lanka
  • Senanayake S.A.M.A.N.S Department of Mechanical Engineering, The Open University of Sri Lanka, Nawala, Nugegoda, Sri Lanka
  • Kulathunga K.D.G Department of Agricultural and Plantation Engineering, The Open University of Sri Lanka, Nawala, Nugegoda, Sri Lanka
Keywords: Solar Tunnel Dryer, drying duration, non-solar hours, quality of dried products

Abstract

The solar tunnel dryer developed by University of Hohenheim was studied under local environmental conditions in Sri Lanka to identify necessary improvements so that   marketable dehydrated products could be produced. Batch trials were carried using   jak fruit (Artocarpus heterophyllus) and brinjal (Solanum melongena). Temperature, relative humidity and air flow rate during the trial period were recorded. Drying duration, physico-chemical and orgonoleptic parameters of the dehydrated products were determined. The dryer was found to be technically feasible and products are hygienically good compared to the open sun drying. Depending on bad weather conditions drying duration varied between 2- 3 days causing to produce organoleptically unacceptable dehydrated products.  The reasons identified for unacceptable quality were the long dying periods and keeping the materials inside the drying compartment overnight without drying. Therefore, there is a necessity to shorten the drying period together with maintenance of a correct temperature inside the drying compartment during non solar hours to preserve the quality of dried products.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

R.S. Wilson, (1999). Postharvest loss of perishable commodities in Sri Lanka. Twelth annual session- Charted institute of transport Sri Lanka, At the chamber of commerce, Colombo.

Z.M. Salmeh, W.A. Lynch, Single stage dual priority regulator for photovoltaic systems, Solar Energy, 48 (1992) 349-351. https://doi.org/10.1016/0038-092X(92)90043-A

M.A.S.U. Kumara, H.S. Jayawardane, K.G.L.R. Jayathunga, D.P. Senanayake, K.B. Palipane, Development and performance evaluation of a dual heat dryer; A Renewable Energy Technology for Sustainable Processing of Agro-Produce, Engineer: Journal of the Institution of Engineers, Sri Lanka, 39 (2006) 19-26. https://doi.org/10.4038/engineer.v39i1.7175

Esper, W. Muhlbauer, Solar tunnel drier for fruits, Plant research and development, Institute for scientific co-operation, Federal Republic of Germany, 44 (1996) 61-80.

P.N.R.J. Amunugoda, N. S. Senanayake, R. S. Wilson Wijeratnam, K.D.G. Kulatunga, Quality Enhancement of Dehydrated Products through the Modification of Solar Tunnel Dryer for Continuous Operation in Rural Communities, International Journal of Energy Engineering, 3 (2013) 7-14.

B.D. Rohitha Prasantha, P.N.R.J. Amunogoda, Moisture Adsorption Characteristics of Solar Dehydrated Mango and Jackfruit, Food and Bioprocess Technology, 6 (2012) 1720-1728. https://doi.org/10.1007/s11947-012-0832-7

D. Renne, R. George, B. Marion, D. Heimiller, C. Gueymard, Solar resource assessment for Sri Lanka and Maldives, National Renewable Energy Laboratory, NREL/ TP- 710- 34645, Colorado, USA, (2003).

J. G. Brenon, J. R. Butters, M. D. Coweli, A. E. V. Lilley, Food Engineering Operations, Department of Science and Technology, University of Reading, UK, (1990) 371- 417.

J. C. Harper, Elements of food engineering, Dehydration, Mac printers’ company, Eastern Pennsylvania, USA. (1976) 241-254.

J. C. Harper, Elements of food engineering, Dehydration, The AVI publishing Company Inc, Connecticut, USA. (1982) 177- 189.

M. Karel, O. R. Fennoma, D. B. Lurd, (1975) Principles of food science part ii: Physical principles of food preservation, Water activity and food preservation, Dehydration of food, Marcel Dekker Inc, New York, USA.

R. K. Gupta, (1993) SBP Hand Book of Export Oriented Food Processing Project, SBP industrial Technology Book Series No. 82. SBP consultant and engineers Pvt Ltd. Delhi, India.

B. Brenderfore, L. Kenedy, C. O. O. Bateman, D. S. Trim, G. C. Mrema, C. Wereko, (1985) Solar driers-Their role in postharvest processing, Common wealth Secretariat Publication, UK.

M.R. Okos, G. Narishman, R.K. Singh, A.C. Weitnaur, (1992). Hand book of food engineering, Food dehydration, Edited by D.R. Heldman & D.B Lund, Marcel Dekker Inc, New York, 475 - 491.

M. I. Gomez, Effect of drying on the nutritive value of foods in Kenya, Edited by Gordon Yaciuk: Proceedings of a workshop held at Edmonton, Alberta, Canada. (1981) 31-35.

G. O. G. Lof, (1962) Recent investigations in the use of solar energy for the drying of solids, Solar energy, 6(4) 122 – 128. https://doi.org/10.1016/0038-092X(62)90122-6

Published
2021-10-30
How to Cite
P.N.R.J, A., R.S, W. W., S.A.M.A.N.S, S., & K.D.G, K. (2021). Performance of Prototype Solar Tunnel Drier Developed by University of Hohenheim Under Local Environmental Conditions in Sri Lanka. Frontiers in Advanced Materials Research, 3(2), 43-55. https://doi.org/10.34256/famr2125
Section
Articles



Views: Abstract : 26 | PDF : 24

Plum Analytics