Modeling mathematically of thermal properties of fuzzy and delinted cotton seed in three new variety (Latif, Kashmar and Khorshid) and different temperatures

Document Type : Research Paper

Authors

1 M.Sc. student, Mechanical Biosystem Department, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

2 Assistant Prof,, Mechanical Biosystem Department, Gorgan University of Agricultural Sciences and Natural

3 Assistant Professor, Cotton Research Institute of Iran, AREEO

4 Assistant Prof,, Mechanical Biosystem Department, Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran.

Abstract

Determination of different thermal properties of cotton seed, including thermal conductivity, special heat and thermal diffusivity is an application in different thermal processes, warehousing and dryer design. Three important thermal properties such as thermal conductivity, special heat and thermal diffusivity were measured in three cotton seed varieties (Kashmar, Latif and Khorshid) in two modes of fuzzy and delinted in three temperatures (20, 30 and 40 °C). In this research, the thermal diffusivity of cotton seed was calculated using a linear heat source, special heat from mixed methods and thermal diffusivity was estimated using the results of experiments related to thermal diffusivity, special heat and mass density of cotton seed. The results showed that temperature changes had not significant effect on thermal diffusivity of three cotton varieties. The changes of variety, temperature and coverage had the effect on special heat at 1% possibility level and also an interaction of species – coverage and temperature – coverage were significant at 1% possibility level. The maximum and minimum special heats for fuzzy cotton seed were 1.83 and 1.18 (kJ/kg˚C) at 20 and 40 °C and 1.45 and 0.86 (kJ/kg˚C) for delinted cotton seed, respectively. The results of thermal diffusivity indicated that the changes of species, heat and coverage had an effect on thermal diffusivity at 1% possibility level and the interaction of variety – coverage and temperature – coverage were significant on thermal diffusivity of cotton seed at 1% possibility level. The maximum and the minimum thermal diffusivity amounts for fuzzy cotton seed were 3.4 × 10-7 and 2.26 × 10-7(m2/s) at 20 and 40 °C and for delinted cotton seed were 2.57 × 10-7 and 1.53 × 10-7(m2/s).

Keywords

References

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Iranian Journal of Cotton Researches
Volume 5, Issue 1 - Serial Number 9
September 2017
Pages 15-32

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