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Design of an experimental set up for convective drying: experimental studies at different drying temperature

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Abstract

An experimental setup is designed to investigate the convective drying of moist object experimentally. All the design data, components of setup, materials and specifications are presented. Transient moisture content of a rectangular shaped potato slice (4 × 2 × 2 cm) is measured at different air temperatures of 40, 50, 60 and 70 °C with an air velocity of 2 m/s. Two different drying rate periods are observed. Results are compared with available results from literature.

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Abbreviations

a, b:

Constants

A1, A2, A3 :

Constants

B:

Breadth of the moist object (cm)

C:

Width of the moist object (cm)

db:

Dry basis

L:

Length of the moist object (cm)

m:

Mass of the object (g)

M:

Moisture content (kg/kg of db)

RH:

Relative Humidity (%)

T:

Temperature (°C)

V:

Volume (cm3)

θ:

Angle (°)

ϕ:

Diameter (cm)

Φ:

Non dimensional moisture content

ρ:

Density of object (g/cm3)

ε:

Porosity

0:

Initial condition

a:

Air

s:

Solid or dry matter

w:

Water

eq:

Equilibrium

References

  1. Velic D, Planinic M, Tomas S, Bili M (2004) Influence of airflow velocity on kinetics of convection apple drying. J Food Eng 64:97–102

    Article  Google Scholar 

  2. Oztop HF, Akpinar EK (2008) Numerical and experimental analysis of moisture transfer for convective drying of some products. Int Commun Heat Mass Transf 35(2):169–177

    Article  Google Scholar 

  3. Wang N, Brennan JG (1993) Changes in structure, density and porosity of potato during dehydration. J Food Eng 24:61–76

    Article  Google Scholar 

  4. Hassini L, Azzouz S, Peczalski R, Belghith A (2007) Estimation of potato moisture diffusivity from convective drying kinetics with correction for shrinkage. J Food Eng 79(1):47–56

    Article  Google Scholar 

  5. Srikiatden J, Roberts JS (2006) Measuring moisture diffusivity of potato and carrot (core and cortex) during convective hot air and isothermal drying. J Food Eng 74(1):143–152

    Article  Google Scholar 

  6. Srikiatden J, Roberts JS (2008) Predicting moisture profiles in potato and carrot during convective hot air drying using isothermally measured effective diffusivity. J Food Eng 84(4):516–525

    Article  Google Scholar 

  7. Akpinar E, Midilli A, Bicer Y (2003) Single layer drying behaviour of potato slices in a convective cyclone dryer and mathematical modeling. Energy Convers Manag 44(10):1689–1705

    Article  Google Scholar 

  8. Yadollahinia A, Jahangiri M (2003) Shrinkage of potato slice during drying. J Food Eng 94(1):52–58

    Article  Google Scholar 

  9. Akpinar EK (2005) Evaluation of convective heat transfer coefficient of various crops in cyclone type dryer. Energy Convers Manage 46:2439–2454

    Article  Google Scholar 

  10. Yadollahinia A, Latifi A, Mahdavi R (2009) New method for determination of potato slice shrinkage during drying. Comput Electron Agric 65(2):268–274

    Article  Google Scholar 

  11. Mayor L, Sereno AM (2004) Modelling shrinkage during convective drying of food materials: a review. J Food Eng 61(3):373–386

    Article  Google Scholar 

  12. Simal S, Rossello C, Berna A, Mulet A (1998) Drying of shrinking cylinder-shaped bodies. J Food Eng 37:423–435

    Article  Google Scholar 

  13. Dutta SK, Nema VK, Bharadwaj RK (1988) Drying behavior of spherical grains. Int J Heat Mass Transf 31(4):855–861

    Article  Google Scholar 

  14. Hernandez JA, Pavon G, Garcia MA (2000) Analytical solution of mass transfer equation considering shrinkage for modeling food-drying kinetics. J Food Eng 45:1–10

    Article  Google Scholar 

  15. Fernando WJN, Ahmad AL, Shukor SRA, Lok YH (2008) A model for constant temperature drying rates of case hardened slices of papaya and garlic. J Food Eng 88:229–238

    Article  Google Scholar 

  16. Baroni AF, Hubinger MD (1998) Drying of onion: effects of pretreatment on moisture transport. Drying Technol 16(9&10):2083–2094

    Article  Google Scholar 

  17. Murugesan K, Seetharamu KN, Narayana PAA (1996) A one dimensional analysis of convective drying of porous materials. Heat Mass Transf 32:81–88

    Article  Google Scholar 

  18. Talukdar P, Stephen Olutmayin O, Olalekan Osanyintola F, Simonson CJ (2007) An experimental data set for benchmarking 1-D, transient heat and moisture transfer models of hygroscopic building materials. Part I: experimental facility and material property data. Int J Heat Mass Transf 50:4527–4539

    Article  Google Scholar 

  19. Talukdar P, Osanyintola OF, Olutmayin SO, Simonson CJ (2007) An experimental data set for benchmarking 1-D, transient heat and moisture transfer models of hygroscopic building materials. Part II: experimental facility and material property data. Int J Heat Mass Transf 50:4915–4926

    Article  MATH  Google Scholar 

  20. Kaya A, Aydın O (2007) Numerical modeling of forced convection drying of cylindrical moist objects. Numer Heat Transf A 51:843–854

    Article  Google Scholar 

  21. Hussain MM, Dincer I (2003) Two-dimensional heat and moisture transfer analysis of a cylindrical moist object subjected to drying: a finite-difference approach. Int J Heat Mass Transf 46:4033–4039

    Article  MATH  Google Scholar 

  22. Mohan VPC, Talukdar P (2010) Three dimensional numerical modeling of simultaneous heat and moisture transfer in a moist object subjected to convective drying. Int J Heat Mass Transf 53:4638–4650

    Article  MATH  Google Scholar 

  23. Mehta RD (1977) The aerodynamic design of blower tunnels with wide angle diffusers. Prog Aero Space Sci 18:59–120

    Article  Google Scholar 

  24. Pesteei SM (2002) Experimental study of heat transfer enhancement and pressure drop in Fin-tube heat exchangers using Winglet vortex generators. Ph.D thesis

  25. Rossello C, Canellas J, Simal S, Berna A (1992) Simple mathematical model to predict the drying rate of potatoes. J Agric Food Chem 40:2374–2378

    Article  Google Scholar 

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Correspondence to Prabal Talukdar.

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Mohan, V.P.C., Talukdar, P. Design of an experimental set up for convective drying: experimental studies at different drying temperature. Heat Mass Transfer 49, 31–40 (2013). https://doi.org/10.1007/s00231-012-1060-4

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