### Abstract

The characteristic drying curves of cocoa beans are determined by using a tunnel drier where conditioned air passes a single cocoa bean suspended from an electronic balance in the test section. Weight loss, and temperatures of air, testa and nib of the cocoa bean is monitored on personal computers. The normalised drying rate versus the normalised moisture content is regressed by least square method to fit a new polynomial model for the penetration falling rate period and a linear model for the regular regime falling rate period. It can be concluded that there are three drying periods for cocoa beans namely the constant drying rate period, the penetration falling rate period and the regular regime falling rate period. The polynomial model estimates the penetration period quite well whereas the linear model estimates the regular regime quite well as well. There is no observable influence of relative humidity and air temperature on the characteristic drying curve of cocoa beans. However, the air velocity seems to have some influence on the curve.

Original language | English |
---|---|

Pages (from-to) | 2387-2396 |

Number of pages | 10 |

Journal | Drying Technology |

Volume | 14 |

Issue number | 10 |

Publication status | Published - 1996 |

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### Keywords

- Characteristic Drying Curves
- Cocoa Beans
- Drying Kinetics

### ASJC Scopus subject areas

- Chemical Engineering (miscellaneous)

### Cite this

*Drying Technology*,

*14*(10), 2387-2396.

**Characteristic drying curves of cocoa beans.** / Wan Daud, Wan Ramli; Meor Talib, Meor Zainal; Ibrahim, Mahamad Hakimi.

Research output: Contribution to journal › Article

*Drying Technology*, vol. 14, no. 10, pp. 2387-2396.

}

TY - JOUR

T1 - Characteristic drying curves of cocoa beans

AU - Wan Daud, Wan Ramli

AU - Meor Talib, Meor Zainal

AU - Ibrahim, Mahamad Hakimi

PY - 1996

Y1 - 1996

N2 - The characteristic drying curves of cocoa beans are determined by using a tunnel drier where conditioned air passes a single cocoa bean suspended from an electronic balance in the test section. Weight loss, and temperatures of air, testa and nib of the cocoa bean is monitored on personal computers. The normalised drying rate versus the normalised moisture content is regressed by least square method to fit a new polynomial model for the penetration falling rate period and a linear model for the regular regime falling rate period. It can be concluded that there are three drying periods for cocoa beans namely the constant drying rate period, the penetration falling rate period and the regular regime falling rate period. The polynomial model estimates the penetration period quite well whereas the linear model estimates the regular regime quite well as well. There is no observable influence of relative humidity and air temperature on the characteristic drying curve of cocoa beans. However, the air velocity seems to have some influence on the curve.

AB - The characteristic drying curves of cocoa beans are determined by using a tunnel drier where conditioned air passes a single cocoa bean suspended from an electronic balance in the test section. Weight loss, and temperatures of air, testa and nib of the cocoa bean is monitored on personal computers. The normalised drying rate versus the normalised moisture content is regressed by least square method to fit a new polynomial model for the penetration falling rate period and a linear model for the regular regime falling rate period. It can be concluded that there are three drying periods for cocoa beans namely the constant drying rate period, the penetration falling rate period and the regular regime falling rate period. The polynomial model estimates the penetration period quite well whereas the linear model estimates the regular regime quite well as well. There is no observable influence of relative humidity and air temperature on the characteristic drying curve of cocoa beans. However, the air velocity seems to have some influence on the curve.

KW - Characteristic Drying Curves

KW - Cocoa Beans

KW - Drying Kinetics

UR - http://www.scopus.com/inward/record.url?scp=0030287237&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030287237&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030287237

VL - 14

SP - 2387

EP - 2396

JO - Drying Technology

JF - Drying Technology

SN - 0737-3937

IS - 10

ER -