@article{ajfst2019764,
author={{Ekop, Inemesit Edem and Simonyan, Kayode Joshua and Onwuka, Udochukwu Nelson},
title={Comparative Analysis of Thermal Properties of Two Varieties of Periwinkle Relevant to Its Processing Equipment Design},
journal={American Journal of Food Science and Technology},
volume={7},
number={6},
pages={189--194},
year={2019},
url={http://pubs.sciepub.com/ajfst/7/6/4},
issn={2333-4835},
abstract={This study was conducted to investigate and compare the thermal properties of two varieties: <i>Tympanotonus fuscatus</i> and <i>Pachymelania aurita</i> of Periwinkle in Nigeria. The thermal properties, namely; specific heat capacity,<i>C</i><SUB><i>p</i></SUB><SUB><b>,</b></SUB> thermal conductivity, k, thermal diffusity,&#945;, thermal absorptivity, &#947; and thermal effusivity, &#8712; of Periwinkle samples were determined. The mean thermal conductivity of <i>T. fuscatus</i> was found to be 0.085¡À0.00015 W/m.K at temperatures of 308 ¨C 373 K, while that of <i>P. aurita</i> was 0.0952¡À0.00056 W/m.K at the same temperature range.The average specific heat capacity value of <i>T. fuscatus </i>was found to be 2403.663¡À3.4379 J/kg.K at temperature of 308 ¨C 373 K lower than that of<i> P. aurita </i>having a mean value of 2832.314¡À1.7385 J/kg.K at the same temperature. The mean thermal diffisivity of <i>T. fuscatus </i>was found to be 2.6553¡Á10<SUP>-8 </SUP>m<SUP>2</SUP>/s while that of <i>P. aurita </i>was found to be 5.6790¡Á10<SUP>-8</SUP> m<SUP>2</SUP>/s. The average values for thermal absorptivity and effusivity of <i>T. fuscatus</i> and <i>P. aurita </i>were obtained as 81.085m<SUP>-1</SUP>; 525.084 W.s<SUP>1/2</SUP>/m<SUP>2</SUP>K and 55.441 m<SUP>-1</SUP>; 396.952 W.s<SUP>1/2</SUP>/m<SUP>2</SUP>K, respectively. The results shown that average thermal absorptivity and effusivity values were higher in <i>T. fuscatus </i>than <i>P. aurita. </i>A Tukey pairwise comparison analysis carried out on the mean values of these thermal properties of <i>T. fuscatus</i> and <i>P. aurita</i> revealed that there is statistically significant difference at &#945;&lt;5% between the thermal properties of the two varieties of periwinkle samples. These data would help us in predicting and controlling the heat flux during the design of periwinkle processing equipment.},
doi={10.12691/ajfst-7-6-4}
publisher={Science and Education Publishing}
}