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Title: Calorimetric equipment with time-evolution parameters measurements and modelling in flow and mass-varying calorimetry
Authors: Rodriguez de Rivera, M. 
Tachoire, H.
Torra, V.
UNESCO Clasification: 2213 Termodinámica
220408 Líquidos
Keywords: Conduction calorimetry
Flow calorimetry
Liquid mixtures
Low concentration
Modelling, et al
Issue Date: 1994
Publisher: 0368-4466
Journal: Journal of Thermal Analysis 
Conference: Mediterranean Days of Calorimetry and Thermal Analysis 
Abstract: The injection calorimeters are used to evaluate thermodynamic properties of the mixtures and solutions. TheH i E partial molar excess enthalpies or theL υ, i relative apparent molar enthalpies against mole fraction are available from an appropriate signal processing of the calorimetric curves. An evolution of the thermal properties of the calorimetric vessel are associated with the injection process. Description of calorimetric equipments by means of a localized—constants model (RC analogy) allows us to systematize and to extent these systems into time dependent situations. Experimental measurements based on Joule effects and associated mathematical analysis permits to determine the absolute limits of the dynamic behaviour of these equipments from several standard and easily experimental parameters (sensitivity, noise level, τ1 the first time constant, sampling period). Models and experimental study provide an estimation of the corrections in order to compensate the evolution of the physical characteristics of the device.
ISSN: 0368-4466
DOI: 10.1007/BF02549933
Source: Journal of Thermal Analysis [ISSN 0368-4466], v. 41, p. 1385-1392
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