Abstract

This study investigated the numerical analysis of heat and mass transfer during solar drying of cocoa beans with firebrick thermal storage material. The continuity, momentum, energy, and species equations were solved for a three-dimensional ellipsoidal cocoa bean using the finite volume method with the aid of ansys, a computational fluid dynamics software. The simulated and experimental maximum product (cocoa) temperatures of 53 and 53.5 °C, respectively, were in agreement with each other. The results obtained in this study will help the stakeholders in the cocoa processing industries in the design of the drying system, selection of suitable drying conditions, prediction of heat and mass transfer in the drying process of cocoa, enhancement of better quality attributes such as color and flavor, and reduction in the cost of design and time in the drying process.

References

1.
Komolafe
,
C. A.
,
Waheed
,
M. A.
, and
Olabamiji
,
T. S.
,
2018
, “
Experimental Determination of Modulus of Elasticity of Oven Dried Cocoa-Beans Varieties
,”
Int. J. Mech. Eng.
,
9
(
11
), pp.
732
740
.
2.
Dincer
,
I.
,
1998
, “
Moisture Transfer Analysis During Drying of Slab Woods
,”
Heat Mass Transfer
,
34
(
4
), pp.
317
320
.
3.
Hii
,
C. L.
,
Law
,
C. L.
, and
Cloke
,
M. C.
,
2008
, “
Modelling of Thin-Layer Drying Kinetics of Cocoa Beans During Artificial and Natural Drying
,”
J. Eng. Sci. Technol.
,
3
(
1
), pp.
1
10
.
4.
Hii
,
C. L.
,
Law
,
C. L.
, and
Cloke
,
M. C.
,
2013
, “
Simulation of Heat and Mass Transfer of Cocoa Beans Under Stepwise Drying Conditions in a Heat Pump Dryer
,”
Appl. Therm. Eng.
,
54
(
1
), pp.
264
271
.
5.
Waheed
,
Komolafe
,
2018
, “
Temperatures Dependent Drying Kinetics of Cocoa Beans Varieties in Air Ventilated Oven
,”
Front. Heat Mass Transfer
,
12
(
8
), pp.
1
7
.
6.
Komolafe
,
C. A.
,
Ojediran
,
J. O.
,
Ajao
,
F. O.
,
Dada
,
O. A.
,
Afolabi
,
Y. T.
,
Oluwaleye
,
I. O.
, and
Alake
,
A. S.
,
2019
, “
Modelling of Moisture Diffusivity During Solar Drying of Locust Beans With Thermal Storage Material Under Forced and Natural Convection Mode
,”
Case Stud. Therm. Eng.
,
15
, p.
100542
.
7.
Golestani
,
R.
,
Raisi
,
A.
, and
Aroujalian
,
A.
,
2013
, “
Mathematical Modeling on Air Drying of Apples Considering Shrinkage and Variable Diffusion Coefficient
,”
Drying Technol.
,
31
(
1
), pp.
40
51
.
8.
Oztop
,
H. F.
, and
Akpinar
,
E. K.
,
2008
, “
Numerical and Experimental Analysis of Moisture Transfer for Convective Drying of Some Products
,”
Int. Commun. Heat Mass Transfer
,
35
(
2
), pp.
169
177
.
9.
Fabbri
,
A.
,
Cevoli
,
C.
,
Romani
,
S.
, and
Rosa
,
M. C.
,
2011
, “
Numerical Model of Heat and Mass Transfer During Roasting Coffee Using 3D Digitised Geometry
,”
Procedia Food Sci.
,
1
, pp.
742
746
.
10.
Nadi
,
F.
,
Rahimi
,
G. H.
,
Younsi
,
R.
,
Tavakoli
,
T.
, and
Hamidi-Esfahani
,
Z.
,
2012
, “
Numerical Simulation of Vacuum Drying by Luikov’s Equations
,”
Drying Technol.
,
30
(
2
), pp.
197
206
.
11.
Chandramohan
,
V.
,
2016
, “
Numerical Prediction and Analysis of Surface Transfer Coefficients on Moist Object During Heat and Mass Transfer Application
,”
Heat Transfer Eng.
,
37
(
1
), pp.
53
63
.
12.
Chandra Mohan
,
V. P.
, and
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 Transfer
,
53
(
21–22
), pp.
4638
4650
.
13.
Ranjbaran
,
M.
,
Emadi
,
B.
, and
Zare
,
D.
,
2014
, “
CFD Simulation of Deep-Bed Paddy Drying Process and Performance
,”
Drying Technol.
,
32
(
8
), pp.
919
934
.
14.
Białobrzewski
,
I.
,
2006
, “
Simultaneous Heat and Mass Transfer in Shrinkable Apple Slab During Drying
,”
Drying Technol.
,
24
(
5
), pp.
551
559
.
15.
De Lima
,
A.
,
Queiroz
,
M.
, and
Nebra
,
S.
,
2002
, “
Simultaneous Moisture Transport and Shrinkage During Drying of Solids With Ellipsoidal Configuration
,”
Chem. Eng. J.
,
86
(
1–2
), pp.
85
93
.
16.
Villa-Corrales
,
L.
,
Flores-Prieto
,
J. J.
,
Xaman-Villasenor
,
J. P.
, and
Garcia-Hernandeez
,
E.
,
2010
, “
Numerical and Experimental Analysis of Heat and Moisture Transfer During Drying of Ataulfo Mango
,”
J. Food Eng.
,
98
(
2
), pp.
198
206
.
17.
Kahveci
,
K.
,
2017
, “
Modeling and Numerical Simulation of Simultaneous Heat and Mass Transfer During Convective Drying of Porous Materials
,”
Text. Res. J.
,
87
(
5
), pp.
617
630
.
18.
Iguaz
,
A.
,
Esnoz
,
A.
,
Martínez
,
G.
,
López
,
A.
, and
Vırseda
,
P.
,
2003
, “
Mathematical Modelling and Simulation for the Drying Process of Vegetable Wholesale By-Products in a Rotary Dryer
,”
J. Food Eng.
,
59
(
2–3
), pp.
151
160
.
19.
Moses
,
J. A.
,
Norton
,
T.
,
Alagusundaram
,
K.
, and
Tiwari
,
B. K.
,
2014
, “
Novel Drying Techniques for the Food Industry
,”
Food Eng. Rev.
,
6
, pp.
43
55
.
20.
Wu
,
H.
,
Fang
,
C.
,
Wu
,
R.
, and
Qiao
,
R.
,
2020
, “
Drying of Porous Media by Concurrent Drainage and Evaporation: A Pore Network Modeling Study
,”
Int. J. Heat Mass Transfer
,
152
, p.
118718
.
21.
García-Alamilla
,
P.
,
Salgado-Cervantes
,
M. A.
,
Barel
,
M.
,
Berthomieu
,
G.
,
Rodríguez-Jimenes
,
G. C.
, and
García-Alvarado
,
M. A.
,
2017
, “
Moisture, Acidity and Temperature Evolution During Cacao Drying
,”
J. Food Eng.
,
79
(
4
), pp.
1159
1165
.
22.
Baghdadi
,
H.
,
2017
, “
Mass Transfer Kinetics and Effective Diffusivities During Cocoa Roasting
,”
J. Eng. Sci. Technol.
,
12
(
1
), pp.
127
137
.
23.
Koua
,
B. K.
,
Koffi
,
P. M. E.
, and
Gbaha
,
P.
,
2019
, “
Evolution of Shrinkage, Real Density, Porosity, Heat and Mass Transfer Coefficients During Indirect Solar Drying of the Cocoa Bean
,”
J. Saudi Soc. Agric. Sci.
,
18
(
1
), pp.
72
82
.
24.
Akharume
,
F.
,
Adeyemi
,
S.
, and
Obayopo
,
S.
,
2019
, “
A Study on the Numerical Simulations and Experimental Validation of a Hybrid Solar Dryer for Cocoa
,”
Proceedings of ASABE Annual International Meeting
,
Boston, MA
,
July 7–10
, pp.
1
16
, ASABE Paper No. 1900890.
25.
Augber
,
F.
,
Nganhou
,
J.
,
Benet
,
J. C.
,
Berthomieu
,
G.
, and
Barel
,
M.
,
1999
, “
Experimental Study of Matter Transfer in Cocoa Beans During Fermentation and Drying
,”
Drying Technol.
,
17
(
6
), pp.
1027
1042
.
26.
Komolafe
,
W.
, and Waheed, A.,
2018
, “
Design and Fabrication of a Forced Convection Solar Dryer Integrated With Heat Storage Materials
,”
Ann. Chim.: Sci. Mater.
,
42
(
1
), pp.
23
39
.
27.
Komolafe
,
C. A.
,
Waheed
,
M. A.
,
Kuye
,
S. I.
,
Adewumi
,
B. A.
,
Oluwaleye
,
I. O.
, and
Olayanju
,
T. M. A.
,
2020
, “
Sun Drying of Cocoa With Firebrick Thermal Storage Materials
,”
Int. J. Energy Res.
,
44
(
8
), pp.
7015
7025
.
28.
Komolafe
,
C. A.
,
Waheed
,
M. A.
,
Kuye
,
S. I.
,
Adewumi
,
B. A.
, and
Adejumo
,
A. O. D.
,
2021
, “
Thermodynamic Analysis of Forced Convective Solar Drying of Cocoa With Black Coated Sensible Thermal Storage Material
,”
Case Stud. Therm. Eng.
,
26
, p.
101140
.
29.
Romero
,
V. M.
,
Cerezo
,
E.
,
Garcia
,
M. I.
, and
Sanchez
,
M. H.
,
2014
, “
Simulation and Validation of Vanilla Drying Process in an Indirect Solar Dryer Prototype Using CFD Fluent Programme
,”
Energy Procedia
,
57
, pp.
1651
1658
. .
30.
Kim
,
D.
,
Son
,
G.
, and
Kim
,
S.
,
2016
, “
Numerical Analysis of Convective Drying of a Moist Object With Combined Internal and External Heat and Mass Transfer
,”
J. Mech. Sci. Technol.
,
30
(
2
), pp.
733
740
.
31.
Komolafe
,
C. A.
,
2019
, “
Development of Numerical and Experimental Cocoa-Beans Solar Dryer
,” Ph.D. thesis,
Federal University of Agriculture
,
Abeokuta, Nigeria
.
32.
Crank
,
J.
,
1975
,
The Mathematics of Diffusion
,
Oxford University Press
,
Oxford
.
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