Determination of Sliced Pineapple Drying Characteristics in A Closed Loop Heat Pump Assisted Drying System


Article Metrics: (Click on the Metric tab below to see the detail)

Article Info
Submitted: 18-02-2018
Published: 18-02-2018
Section: Articles
Fulltext PDF Tell your colleagues Email the author

Pineapple (Ananascomosus) slices were dried with the aid of a heat pump assisted dryer (HPD). During this process, air velocity was kept constant at 1m/s, while air temperatures were changed as 37°C, 40°C and 43°C. The drying air was also circulated by using an axial fan in a closed cycle and fresh air was not allowed into the system. The drying rate and drying time were significantly influenced by drying temperature. It was observed that drying temperatures had significant effects on the drying rate and drying time. During the conduct of the study, pineapple slices were dried at 37, 40 and 43°C for 465, 360 and 290 min, respectively. The specific moisture extraction ratio (SMER) values were observed to change as drying temperatures were changed. The drying rate curves indicated that the whole drying process occurred in the falling rate period. Seven well-known thin-layer models (Lewis, Henderson &Pabis, Logarithmic, Page, Midilli & Kucuk, Weibull and Aghbashlo et al.) were employed to make a prediction about drying kinetics through nonlinear regression analysis. The Midilli & Kucuk and Aghbashlo et al. models were consistent with the experimental data. Fick’s second law of diffusion was used to determine the moisture diffusivity coefficient ranging from 3.78×10–9 to 6.57×10-9  m2/s the each of the above mentioned temperatures. The dependence of effective diffusivity coefficient on temperature was defined by means a fan Arrhenius type equation. The activation energy of moisture diffusion was found to be 75.24kJ/mol.


Article History: Received: July 18th 2017; Received: October 27th 2017; Accepted: January 16th 2018; Available online

How to Cite This Article: Tunçkal, C., Coşkun, S., Doymaz, I. and Ergun, E. (2018) Determination of Sliced Pineapple Drying Characteristics in A Closed Loop Heat Pump Assisted Drying System. International Journal of Renewable Energy Development, 7(1), 35-41.


Heat pump; dryer; pineapple; drying; drying kinetics

  1. Cüneyt Tunçkal 
    Yalova Community College, Electric and Energy Department, Air Conditioning And Refrigeration Technology Program, Yalova University, 77100 Yalova,, Turkey
  2. Salih Coşkun 
    Vocational School of Technical Science, Electric and Energy Department, Air Conditioning and Refrigeration Technology Program, 16059 Bursa, Turkey
  3. İbrahim Doymaz 
    Department of Chemical Engineering, Yıldız Technical University, 34210 Esenler, Istanbul, Turkey
  4. Ernes Ergun 
    dInstitute of Science, Uludag University, 16059 Görükle, Bursa, Turkey
  1. Achariyaviriya S., Sopanronnarit S and Terdyothin A. (2000) Mathematical Model Development and Simulation of Heat Pump FruitDdryer. Drying Technology, 18 (1,2), 479-591.
  2. Agarry S.E., Ajani A.O and Aremu M.O. (2013) Thin Layer Drying Kinetics of Pineapple: Effect of Blanching Temperature–Time Combination. Nigerian Journal of Basic and Applied Science, 21, 1-10.
  3. Aghbashlo M., Kianmehr M.H., Khani S and Ghasemi M. (2009) Mathematical Modeling of Carrot Thin-Layer Drying Using New Model. International Agrophysics, 23, 313-317.
  4. Akpinar E. K and Toraman S. (2016) Determination of Drying Kinetics and Convective Heat Transfer Coefficients of Ginger Slices. Heat and Mass Transfer, 52, 2271-2281.
  5. Aktas M and Kara M. Ç. (2013) Güneş Enerjisive Isı Pompalı Kurutucuda Dilimlenmiş Kivi Kurutulması. Journal of the Faculty of Engineering and Architecture of Gazi University 28, 733-741.
  6. Aktas M., Sevik S., Doğan H and Ozturk M. (2012) Fotovoltaikve Termal Günes Enerjili Sürekli Bir Kurutucuda Domates Kurutulması. J of Agri. Sci, 18, 287- 298.
  7. Aktas M., Ceylan I and Yılmaz S. (2009) Determination of Drying Characteristics of Apples in a Heat Pump and Solar Dryer. Desalination, 239, 266-275.
  8. Bala B. K., Mondol M. R. A., Biswas, B. K., DasChowdury B. L and Janjai S. (2003) Solar drying of pineapple using solar tunnel drier. Renewable Energy 28 (2003), 183-190.
  9. Ceylan I. (2009) Energy Analysis of PID Controlled Heat Pump Dryer. Engineering, 1, 188-195.
  10. Chua K., Mujumdar A., Hawlader M., Chou S and Ho J. (2001) Batch Drying of Banana Pieces-Effect of Stepwise Change in Drying Air Temperature on Drying Kinetics and Product Colour. Food Research International, 34, 721-731.
  11. Colak N and Hepbasli A. (2009) A Review of Heat Pump Drying part 1- Systems Models and Stuides. Energy conversion and Management, 50, 2180-2186.
  12. Coşkun S, Doymaz, İ., Tunçkal, C., Erdoğan S. (2017) Investigation of drying kinetics of tomato slices dried by using a closed loop heat pump dryer. Heat and Mass transfer, 53, 1863-1871.
  13. Corrêa J.L.G., Dev S.R.S., Gariepy Y and Raghavan, G.S.V. (2011) Drying of Pineapple by Microwave-Vacuum with Osmotic Pretreatment. Drying Technology, 29, 1556-1561.
  14. Crank J, (1975) The Mathematics of Diffusion. Oxford: Clarendon Press,.
  15. Filho O. A and Strommen I. (1996) The Application of Heat Pump in Drying of Biomaterials. Drying Technology, 14(9), 2061-2090.
  16. Gujral H. S., Oberoi D. P. S., Singh R., Gera M. (2013) Moisture Diffusivity During Drying of Pineapple and Mango Leather as Affected by Sucrose, Pectin, and Maltodextrin. International Journal of Food Properties, 16, 359-368.
  17. Juan W., Chong Z., Zhentao Z and Luwei Y. (2013) Performance Analysis of Heat Pump Dryer to Dry Mushroom. Advanced J. of Food Sci. and Technology, 5 (2), 164-168.
  18. Kingsly A. R. P., Balasubramaniam, V. M and Rastogi, N. K. (2009) Effect of high-pressure processing on texture and drying behavior of pineapple. Journal of Food Process Engineering, 369–381.
  19. Marcel E., Tchamye B., Alexis K and François G. (2013) Optimization of the Design and Drying Process Adapted to Pineapple Slices. Journal of Food Science and Engineering, 3, 609-615.
  20. Morton, JF, (1987) Pineapple, Ananascomosus. Retrieved,2011-04-22.
  21. Olanipekun B. F. (2015) Mathematical Modeling of Thin-Layer Pineapple Drying. Journal of Food Processing and Preservation, 39,1431–1441.
  22. Olanipekun B. F., Tunde-Akintunde T. Y., Oyelade O. J., Adebisi M. G and Adenaya T. A. (2015) Mathematical Modeling of Thin-Layer Pineapple Drying. Journal of Food Processing and Preservation, 39,1431–1441.
  23. Olimat, A.N. (2017) Study of Fabricated Solar Dryer of Tomato Slices Under Jordon Climate Condition. International Journal of Renewable Energy Development, 6(2), 93-101.
  24. Omolola, A.O.,Jideani, I.O., Patrick F and Kapila, P.F.(2017) Quality Properties of Fruits as Affected by Drying Operation. Critical Reviews in Food Science and Nutrition, 57, 95-108.
  25. Pal U.S., Khan M.K and Mohanty S.N. (2008) Heat Pump Drying of Green Sweet Pepper. Drying Technology, 26: 1584-1590.
  26. Phani K. A and Greg J. S. (2005) Re-circulating Heat Pump Assisted Continuous Bed Drying and Energy Analysis. International Journal of Energy Research, 29, 961-972.
  27. Prasertsan S and Saen-Saby P.(1998) Heat Pump Drying of Agricultural Material. Drying Technology, 16 (1,2), 235-250.
  28. Queiroz R., Gabas A.L and Telis V.R.N. (2004) Drying Kinetics of Tomato by Using Electric Resistance and Heat Pump Dryers. Drying Technology 22, 1603–1620.
  29. Ramallo L. A and Mascheroni R.H. (2012) “Quality evaluation of pineapple fruit during drying process”. Food and Bioproducts Processing, 90, 275–283.
  30. Soponronnarit S., Nathakaranakule, A., Wetchacama S., Swasdisevi, T and Rukprang P.(1998) Fruit Drying Using HeatPump. RERIC International Energy Journal, 20, 38–53.
  31. Strommen I and Kramer K.(1994) New Applications of Heat Pumps in Drying Processes. Drying Technology, 12(4), 889-901.
  32. Teeboonma U., Tiansuwan J and Soponronnarit S.(2003) Optimization of Heat Pump Fruit Dryers. Journal of Food Eng, 59,369-377.
  33. Zogzas N. P., Maroulis Z. B and Marinos-Kouris D.(1996) Moisture Diffusivity Data Compilation in Food stuffs. Drying Technology, 14, 2225-2253.