On the intermittent drying of an agricultural product

被引：49

作者：

Chou, SK ^{[1
]}

Chua, KJ ^{[1
]}

Mujumdar, AS ^{[1
]}

Hawlader, MNA ^{[1
]}

Ho, JC ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mech & Prod Engn, Singapore 119260, Singapore

来源：

FOOD AND BIOPRODUCTS PROCESSING | 2000年 / 78卷 / C4期

关键词：

heat pump drying; potato samples; sorption isotherm; drying front;

D O I：

10.1205/09603080051065296

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

A mechanistic model has been employed to demonstrate the significant advantages of intermittent drying of an agricultural product. The model incorporates both liquid and vapour migration as well as heat transfer in a food material. Analyses of predicted results show good agreement between the simulation model and experimental values within 7.4%. The model shows tempering of the product and increased surface moisture content when the air temperature was switched from the 'on' period to the 'off' period. The time-evolution of the product surface temperature and moisture has been investigated for both constant and intermittent drying schemes. Comparison of the drying front due to intermittent and constant drying is also made.

引用

页码：193 / 203

页数：11

共 29 条

[1] Choi Y., 1986, FOOD ENG PROCESS APP, V1, P93
[2] Identification of the receding evaporation front in convective food drying
Chou, SK
Hawlader, MNA
Chua, KJ
[J]. DRYING TECHNOLOGY, 1997, 15 (05) : 1353 - 1367
[3] Convective drying of banana, guava and potato pieces: Effect of cyclical variations of air temperature on drying kinetics and color change
Chua, KJ
Mujumdar, AS
Chou, SK
Hawlader, MNA
Ho, JC
[J]. DRYING TECHNOLOGY, 2000, 18 (4-5) : 907 - 936
[4] Cyclic air temperature drying of guava pieces: Effects on moisture and ascorbic acid contents
Chua, KJ
Chou, SK
Ho, JC
Mujumdar, AS
Hawlader, MNA
[J]. FOOD AND BIOPRODUCTS PROCESSING, 2000, 78 (C2) : 72 - 78
[5] GIOWACKA M, 1986, DRYING SOLIDS, P77
[6] Guggenheim E.A., 1966, APPL STAT MECH
[7] ALTERNATING BOUNDARY-CONDITIONS IN DRYING
HALLSTROM, A
[J]. CHEMICAL ENGINEERING SCIENCE, 1986, 41 (09) : 2225 - 2234
[8] OPTIMIZATION OF GRAIN DRYING - WITH REST-PERIODS
HARNOY, A
RADAJEWSKI, W
[J]. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 1982, 27 (04): : 291 - 307
[9] Hayes G. D., 1987, Food engineering data handbook
[10] HEMATI M, 1992, FLUIDIZATION, V7

← 1 2 3 →