Title page for ETD etd-61397-204256


Type of Document Master's Thesis
Author Radhakrishnan, Sudhaharini
Author's Email Address sradhakr@vt.edu
URN etd-61397-204256
Title Measurement of Thermal Properties of Seafood
Degree Master of Science
Department Biological Systems Engineering
Advisory Committee
Advisor Name Title
Hackney, Cameron Raj
Haugh, C. Gene
Perumpral, John V.
Diehl, Kenneth C. Committee Chair
Keywords
  • differential scanning calorimeter
  • thermistor
  • seafood
  • thermal properties
Date of Defense 1997-06-26
Availability unrestricted
Abstract

Thermal properties of ten different seafood were measured in this research. They included bluefish (Pomatomus saltatrix), croaker (Micropogonias undulatus), spanish mackerel (Scomberomorus maculatus), pink salmon (Oncorhynhus gorbuscha), black seabass (Atractoscion nobilis), spot (Leiostomus xanthurus), shrimp(Pandalus borealis), tilapia (Tilapia aurea), grey sea trout(Cynoscion regalis), and yellow fin tuna (Thunnus albacares) (Wheaton, et al. 1985). Thermal properties measured were thermal conductivity, thermal diffusivity, and specific heat from 5 to 30oC. Enthalpy was measured from -40 to 30oC. Moisture and fat content were measured. Thermal conductivity and thermal diffusivity were measured by a rapid transient technique using a bead thermistor probe. Specific heat and enthalpy were measured using a differential scanning calorimeter. Moisture content and fat content were measured by the AOAC specified oven dry method and ether extraction method, respectively.

The measured thermal properties agreed well with the scarcely available literature values. They were then statistically correlated with moisture and fat content. Based on statistical analysis, mathematical models relating thermal properties and composition were proposed and compared with the models available in the literature. Models for thermal conductivity and specific heat were recommended to predict these properties of meats and fish with similar composition.

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