Performance of Heat Pump Dryer for Kaffir Lime Leaves and Quality of Dried Products under Different Temperatures and Media
This research is to study the performance of heat
pump dryer for drying of kaffir lime leaves under different media and
to compare the color values and essential oil content of final products
after drying. In the experiments, kaffir lime leaves were dried in the
closed-loop system at drying temperatures of 40, 50 and 60 oC. The
drying media used in this study were hot air, CO2 and N2 gases. The
velocity of drying media in the drying chamber was 0.4 m/s with
bypass ratio of 30%. The initial moisture content of kaffir lime leaves
was approximately 180-190 % d.b. It was dried until down to a final
moisture content of 10% d.b. From the experiments, the results
showed that drying rate, the coefficient of performance (COP) and
specific energy consumption (SEC) depended on drying temperature.
While drying media did not affect on drying rate. The time for kaffir
lime leaves drying at 40, 50 and 60 oC was 10, 5 and 3 hours,
respectively. The performance of the heat pump system decreased
with drying temperature in the range of 2.20-3.51. In the aspect of
final product color, the greenness and overall color had a great
change under drying temperature at 60 oC rather than drying at 40
and 50 oC. When compared among drying media, the greenness and
overall color of product dried with hot air at 60 oC had a great change
rather than dried with CO2 and N2.
[1] G. Vázquez, F. Chemo, R. Moreria, and E. Cruz "Grape Drying in a
Pilot Plant With a Heat Pump," Drying Technology-An International
Journal, vol. 15 (3&4), pp. 899-920, 1997.
[2] S.Prasertsan, and P. Saen-saby, "Heat pump drying of agricultural
materials," Drying Technology-An International Journal, vol. 16 (1&2),
pp. 235-250, 1998.
[3] U. Teeboonma, J. Tiansuwan and S. Soponronnarit "Optimization of
heat pump fruit dryers," Journal of Food Engineering, vol.59 (4), pp.
369-377, 2003.
[4] C. O. Perera and M. S. Rahman. "Heat pump dehumidifier drying of
food," Trends in Food Science & Technology, vol. 8, pp. 75-79, 1997.
[5] M. B. O-Neill, M. S. Rahman, C. O. Perera, B. Smith, and L. D. Melton,
"Colour and density of apple cubes dried in air and modified
atmosphere," International Journal of Food Properties, vol. 1 (3), pp.
197-205, 1998.
[6] M. N. A. Hawlader,., C. O. Perera, and M. Tian, "Properties of modified
atmosphere heat pump dried foods," Journal of Food Engineering, vol.
47 (4), pp. 387-402, 2006.
[7] A. Arabhosseini, W. Huisman, A. van Boxtel, and J. Muller, "Long-term
effects of drying conditions on the essential oil and color of tarragon
leaves during storage," Journal of Food Engineering, vol. 79 (2), pp.
561-566, 2007.
[8] O. T.Asekun, D. S. Grierson, and A. J. Afolayan, "Effects of drying
methods on the quality and quantity of the essential oil of Mentha
longifolia L. subsp.Capensis," Food Chemistry, vol. 101 (3), pp. 995-
998, 2007.
[1] G. Vázquez, F. Chemo, R. Moreria, and E. Cruz "Grape Drying in a
Pilot Plant With a Heat Pump," Drying Technology-An International
Journal, vol. 15 (3&4), pp. 899-920, 1997.
[2] S.Prasertsan, and P. Saen-saby, "Heat pump drying of agricultural
materials," Drying Technology-An International Journal, vol. 16 (1&2),
pp. 235-250, 1998.
[3] U. Teeboonma, J. Tiansuwan and S. Soponronnarit "Optimization of
heat pump fruit dryers," Journal of Food Engineering, vol.59 (4), pp.
369-377, 2003.
[4] C. O. Perera and M. S. Rahman. "Heat pump dehumidifier drying of
food," Trends in Food Science & Technology, vol. 8, pp. 75-79, 1997.
[5] M. B. O-Neill, M. S. Rahman, C. O. Perera, B. Smith, and L. D. Melton,
"Colour and density of apple cubes dried in air and modified
atmosphere," International Journal of Food Properties, vol. 1 (3), pp.
197-205, 1998.
[6] M. N. A. Hawlader,., C. O. Perera, and M. Tian, "Properties of modified
atmosphere heat pump dried foods," Journal of Food Engineering, vol.
47 (4), pp. 387-402, 2006.
[7] A. Arabhosseini, W. Huisman, A. van Boxtel, and J. Muller, "Long-term
effects of drying conditions on the essential oil and color of tarragon
leaves during storage," Journal of Food Engineering, vol. 79 (2), pp.
561-566, 2007.
[8] O. T.Asekun, D. S. Grierson, and A. J. Afolayan, "Effects of drying
methods on the quality and quantity of the essential oil of Mentha
longifolia L. subsp.Capensis," Food Chemistry, vol. 101 (3), pp. 995-
998, 2007.
@article{"International Journal of Biological, Life and Agricultural Sciences:61302", author = "N. Poomsa-ad and K. Deejing and L. Wiset", title = "Performance of Heat Pump Dryer for Kaffir Lime Leaves and Quality of Dried Products under Different Temperatures and Media", abstract = "This research is to study the performance of heat
pump dryer for drying of kaffir lime leaves under different media and
to compare the color values and essential oil content of final products
after drying. In the experiments, kaffir lime leaves were dried in the
closed-loop system at drying temperatures of 40, 50 and 60 oC. The
drying media used in this study were hot air, CO2 and N2 gases. The
velocity of drying media in the drying chamber was 0.4 m/s with
bypass ratio of 30%. The initial moisture content of kaffir lime leaves
was approximately 180-190 % d.b. It was dried until down to a final
moisture content of 10% d.b. From the experiments, the results
showed that drying rate, the coefficient of performance (COP) and
specific energy consumption (SEC) depended on drying temperature.
While drying media did not affect on drying rate. The time for kaffir
lime leaves drying at 40, 50 and 60 oC was 10, 5 and 3 hours,
respectively. The performance of the heat pump system decreased
with drying temperature in the range of 2.20-3.51. In the aspect of
final product color, the greenness and overall color had a great
change under drying temperature at 60 oC rather than drying at 40
and 50 oC. When compared among drying media, the greenness and
overall color of product dried with hot air at 60 oC had a great change
rather than dried with CO2 and N2.", keywords = "airless drying, drying rate, essential oil content", volume = "5", number = "7", pages = "386-4", }