A SIMPLE-MODEL FOR ESTIMATION OF THE FILM COEFFICIENTS DURING COOLING OF CERTAIN SPHERICAL FOODSTUFFS WITH WATER

被引：24

作者：

DINCER, I

机构：

[1] Dept. of Refrigeration Technology TUBITAK-Marmara Research Center Gebze, Kocaeli

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 1991年 / 18卷 / 04期

关键词：

Food Products;

D O I：

10.1016/0735-1933(91)90059-D

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, a method was proposed and tested for the determination of the convective heat transfer coefficients during cooling of the spherical foodstuffs by means of a water flow in the pool. Experiments were performed in a cold water pool at temperatures of 0.8, 1 and 1.2-degrees-C, and at a flow velocity of 0.05 m/s. The product temperatures at the center, semi-radial distance and surface were measured and then the experimental convective heat transfer coefficients were obtained by using the proposed model which was the function of dimensionless temperature and the Biot and Fourier numbers. The semitheoretical convective heat transfer coefficients were also calculated by Vliet and Leppert's correlation. Furthermore, the experimental and semi-theoretical coefficients were plotted against time at different water temperatures for two products.

引用

页码：431 / 443

页数：13

共 13 条

[1]

Holman, Heat Transfer, (1976)

[2]

Ozisik, Basic Heat Transfer, (1977)

[3]

Geankoplis, Transport Processes and Unit Operation, (1978)

[4]

Ansari, A simple and accurate method of measuring surface film conductance for spherical bodies, Int. Comm. Heat Mass Transfer, 14, 2, pp. 229-236, (1987)

[5]

Ranade, Narayankhedkar, Thermal characteristics of fruits and vegetables as applied to hydrocooling, Int. Inst. Refrigeration, pp. 251-257, (1982)

[6]

Pflug, Kopelman, Correlating and predicting transient heat transfer rates in food products, Int. Inst. Refrigeration, pp. 89-100, (1966)

[7]

Sweat, Thermal properties of foods, Engineering Properties of Foods, pp. 49-87, (1986)

[8]

ASHRAE Handbook of Fundamentals, (1981)

[9]

Arpaci, Conduction Heat Transfer, (1966)

[10]

Carslaw, Jaeger, Conduction of Heat in Solids, (1959)

← 1 2 →