Determination of thermophysical properties of cupuassu (Theobroma grandiflorum) dry almonds

Abstract

In comparison to cocoa, little has been reported on the drying of cupuassu almonds that can be used to produce cupulate, a chocolate type product. Thus, in this study thermophysical properties of cupuassu dry almonds (moisture = 9.68 % d.b.) were determined as: thermal conductivity (k) of 0.14 kW/(m.K), specific heat (cp) of 2.86 kJ/(kg.K), thermal diffusivity (?) of 4.8·10-5 m²/s, effective diffusivity (Deff) of 9.94·10-10 - 6.29·10-10 m²/s and activation energy (Ea) of 14.90 kJ/mol. These results showed a similarity of values between cupuassu and cocoa and allows to perform more specific studies for the development of dryers for the cupuassu almonds.

Biogenerator for a Cocoa Farm

“…This bark is crushed and mixed with water at the rate of 1 ton/m 3 , using as a reference the same proportion used by the biodigester built by CEPLAC in 1979. This study can be replicated for the cupuassu case (CUNHA, 2021).…”