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Título: | Thermal expansion coefficient and specific heat capacity from sound velocity measurements in tomato paste from 0.1 up to 350 MPa and as a function of temperature |
Autor: | Aparicio, Cristina CSIC; Guignon, Bérengère; Otero, Laura CSIC ORCID; Sanz Martínez, Pedro Dimas CSIC ORCID | Fecha de publicación: | 2011 | Editor: | Elsevier | Citación: | Journal of Food Engineering 104: 341- 347 (2011) | Resumen: | The thermodynamic properties of food as a function of pressure and temperature are essential for modeling high-pressure processes. Sound velocity measurements in liquids at high pressure conditions are particularly interesting because they allow for deriving other properties such as the specific heat capacity or thermal expansion coefficient which are difficult to measure. By other means, in this work, the sound velocity was measured in tomato paste at high pressures with a purposed designed acoustic cell. The measurements were made in a wide range of pressures and temperatures from 0.1 to 350 MPa and from 0 to 50 °C, respectively. The sound velocity was directly measured with an accuracy of 0.1% using the transmission technique with piezoelectrics operating at 2 MHz. Thereafter, the isentropic compressibility coefficient of tomato paste was calculated from experimental data. Specific heat capacity and thermal expansion coefficient were also obtained through a software algorithm. © 2011 Elsevier Ltd. All rights reserved. | URI: | http://hdl.handle.net/10261/61403 | DOI: | 10.1016/j.jfoodeng.2010.12.026 | Identificadores: | doi: 10.1016/j.jfoodeng.2010.12.026 issn: 0260-8774 |
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