|
|
|
|
|
| International Agrophysics |
| publisher: | Institute of Agrophysics
Polish Academy of Sciences
Lublin, Poland |
| ISSN: |
0236-8722 |
vol. 16, nr. 1 (2002)
|
|
|
previous paper back to paper's list next paper
|
|
|
Influence of temperature and variety on the thermal properties of apples
|
|
| (get PDF )
|
|
|
Lisowa H.1, Wujec M.1, Lis T.2
|
|
|
1 Chair of Thermal Technology University of Agriculture, Doświadczalna 44, 20-236 Lublin, Poland |
|
|
2 Department of Drying and Storing University of Agriculture, Doświadczalna 44, 20-236 Lublin, Poland |
|
|
vol. 16 (2002), nr. 1,
pp. 43-52
|
|
|
abstract
The influence of temperature within the range 273 to 333 K (0-60°C) on the thermal properties of four apple varieties has (Jonathan Red, Golden Delicious, Idared, Jonagold) been studied. An impulse method to measure thermal properties in which a linear source of heat generates a short-term heat impulse was worked out in the model of an infinite cylinder. Temperature and variety exert a significant influence on the values of thermal conductivity coefficient and thermal diffusion. In each case the influence was at the level of significance a=0.01. In the case of volumetric specific heat (cr) no statistically significant differences were found other than for the varieties Jonagold and Idared. With a temperature increase in the range 273-333 K (0-60°C) the values of apple thermal properties increased linearly.
|
|
keywords
thermal properties of apples, impulse method
|
|
|
|
|
|
|
