Measurements of the thermal effusivity of transparent liquids by means of a photopyroelectric technique
J.A. Balderas-López
Departamento de Matemáticas, Unidad Profesional Interdisciplinaria de Biotecnología del IPN, Avenida Acueducto S/N, Col. Barrio la Laguna, Del. Gustavo A. Madero, C. P. 07340, México, D. F., México, e-mail: abrahambalderas@hotmail.com, andabalderas@acei.upibi.ipn.mx
Recibido el 31 de julio de 2002.
Aceptado el 1 de abril de 2003
Abstract
A new photopyroelectric methodology for thermal effusivity measurements in transparent liquids is presented. This methodology involves the photopyroelectric technique in the standard front-surface configuration. A signal normalization procedure, which avoids the conventional requirement for transfer function determination is implemented. The thermal effusivity of three liquids was measured by means of this device and very good agreement was found with the corresponding values reported in the literature.
Keywords: Photopyroelectric techniques; thermal effusivity; transparent liquids.
Resumen
Se presenta una nueva metodología fotopiroeléctrica para la medición de la efusividad térmica de líquidos transparentes. Esta metodología involucra la técnica fotopiroeléctrica en la configuración estándar. Se implementa un procedimiento de normalización con el que se evita el requerimento de conocer la función de transferencia. Dicho procedimiento se utilizó para medir la efusividad térmica de tres líquidos transparentes encontrándose excelente acuerdo con los valores reportados en la literatura.
Palabras clave: Técnicas fotopiroeléctricas; efusividad térmica; líquidos transparentes.
PACS: 07.20.Ym; 66.70.+f.
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