| Autor: |
Mazurenko, Olga, Kharchenko, Liliia, Kolomiets, Dmytro, Mazurenko, Oleksandr |
| Předmět: |
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| Zdroj: |
Ukrainian Food Journal; 2019, Vol. 8 Issue 1, p133-154, 22p |
| Abstrakt: |
Introduction. The analytical researches of methods and devices of determination of thermophysical properties of complicated structure and chemical composition of products of processing industry are carried out in order to increase the accuracy of measurements. Materials and methods. The basis of the studied devices is thermoelectric converters of temperature and heat flow in the form of "auxiliary wall". To improve the accuracy of the measurements of the thermophysical characteristics of materials, the graph-analytical method of calibration of the devices was used. Results and discussion. To study the thermophysical characteristics of thermolabial materials, the most suitable thermometric means of their complex definition, which allow to conduct research in the presence or absence of material phase transformations of its constituents. The calorimetric measuring instruments are based on the measurement of the temperature of the heat fluxes that penetrate the sample under different thermal conditions. Thermal, electric and other transmission processes in thermometric materials determine the instability of the transformation function and form an instrumental error. On the basis of the calculation and graphic analysis of the thermal and capacitive resistance of the "device-sampler" system, a fundamentally new method has been developed, according to which the thermophysical characteristics of the material and the metrological characteristics of the device are determined in a complex and simultaneously based on the results of the experiment with samples of only the test material. Conclusion. Simultaneous obtaining information on the values of the thermophysical characteristics of the material and the metrological characteristics of the device can improve the accuracy of the determination of the thermophysical characteristics of products. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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