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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-c10000d1-c4cf-4bbb-ab0e-e6821fcbeff8

Czasopismo

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Tytuł artykułu

Data-based method for the determination of temperature dependence of heat capacity of highly dispersed powders

Autorzy Karnina, A.  Gyrenko, A.  Klymenko, A.  Mysov, O. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Accuracy of engineering and economic calculations in different areas requires the use of accurate and prompt values of heat capacity for new or modified materials. A number of existing methods have an error in measuring the heat capacity of powder materials, and use non-standard devices and electric heaters which are not produced industrially. This work is aimed at developing the method for determining the heat capacity of the powder, accuracy evaluation of this method and mathematical processing of experimental data to determine the temperature dependence of the molar heat capacity. To solve the problem the method based on the DTA technique was developed. The measuring apparatus for determining the temperature dependence of the heat capacity includes two standard cups for DTA analysis with investigated material and MgO, heat-variable resistor of film type Pt100, multichannel recorder. The apparatus is placed in a drying oven. From the theory of heat transfer and the assumption about steady-flow heat transfer the equation for molar heat capacity was obtained. The method requires the measuring of temperature of the investigated material and MgO during the linear heat of the drying oven as well as air temperature in the oven. Empirical values of heat capacity of standard substances calculated by the equation for each temperature were compared with the values from reference data. The uncertainty of finding the heat capacity did not exceed 0,5%.
Słowa kluczowe
EN highly dispersed powder   heat capacity   equations   experimental measurement   uncertainty of measurements  
Wydawca Polish Academy of Sciences, Branch in Lublin
Czasopismo ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Rocznik 2015
Tom Vol. 4, No 4
Strony 23--28
Opis fizyczny Bibliogr. 27 poz., rys., tab., wz.
Twórcy
autor Karnina, A.
autor Gyrenko, A.
  • Ukrainian State University of Chemical Technology
autor Klymenko, A.
  • Ukrainian State University of Chemical Technology
autor Mysov, O.
  • Ukrainian State University of Chemical Technology
Bibliografia
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