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Ciência e Agrotecnologia

Print version ISSN 1413-7054

Abstract

ARAUJO, Josalice de Lima; QUEIROZ, Alexandre José de Melo  and  FIGUEIREDO, Rossana Maria Feitosa de. Termophysical properties of cupuaçu pulp at different solids contents. Ciênc. agrotec. [online]. 2004, vol.28, n.1, pp. 126-134. ISSN 1413-7054.  http://dx.doi.org/10.1590/S1413-70542004000100017.

This work was accomplished with the aim of determining the termophysical properties, thermal diffusivity, specific heat and thermal conductivity of cupuaçu pulp in three conditions of solids contents: 12ºBrix, 9ºBrix, and partial elimination of the insoluble solids (sieving). The thermal diffusivity was determined by means of Dickerson’s (1965) apparatus, for the specific heat the method of mixtures was used and the thermal conductivity was determined starting from the relationship among thermal diffusivity, specific heat and density. Equations were used for the theoretical calculation of those properties and the results were compared with the experimental values. The average results, obtained for the thermal diffusivity, specific heat and thermal conductivity of the 12ºBrix, 9ºBrix and sieved samples were, respectively: 1.31x10-7, 1.32x10-7 and 1.27x10-7 m2/s; 3.24, 3.71 and 3.18 kJ/kgºC; and 0.44 W/mºC, 0.50 W/mºC and 0.42 W/mºC.

Keywords : thermophysical; fruit; Theobroma grandiflorum.

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