Experimental determination of indicators of thermal state of refrigerator cars under operating conditions

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.183003

Keywords:

refrigerator car, thermal insulation, thermal tests, heat and mass transfer, heat transfer coefficient, effective opening, mathematical model

Abstract

For the experimental determination of the thermal state of refrigerator cars under operating conditions, a procedure for separate determination of heat and mass transfer parameters is proposed. Its peculiarity lies in the fact that conditions, methods and means of thermal tests used in the construction, operation and repair of refrigerator cars are used for the experimental determination of conductive heat transfer and tightness indicators. For separate determination of the true heat transfer coefficient  and effective opening Fek, experimental conditions of the thermal process of heating air in the cargo space of the car body and measurement of the volume of air flow through leaks under constant standard overpressure of 49 Pa in the body were used.

Based on the values of the true heat transfer coefficient  and effective opening Fek, taking into account the thermophysical properties of cargo and using MS Excel tools, graphical dependences of changes in cargo temperature in the refrigerator car on transportation conditions are constructed.

The results of the study are proposed to be used for separate determination of heat and mass transfer indicators and evaluation of thermal properties of the body sheathing of refrigerator cars under operating conditions. Based on the value of the true heat transfer coefficient and effective opening, it is possible to determine changes in cargo temperature in transportation conditions, taking into account the temperature difference of the atmospheric air

Author Biographies

Viktor Оs’mak, State University of Infrastructure and Technologies Kyrylivska str., 9, Kyiv, Ukraine, 04071

PhD

Department of Wagons and Rolling Stock

Vadym Ishchenko, State University of Infrastructure and Technologies Kyrylivska str., 9, Kyiv, Ukraine, 04071

PhD, Associate Professor

Department of Wagons and Rolling Stock

Ivan Kulbovskyi, State University of Infrastructure and Technologies Kyrylivska str., 9, Kyiv, Ukraine, 04071

PhD, Associate Professor

Department of Building Structures and Facilities

Alina Nechyporuk, State University of Infrastructure and Technologies Kyrylivska str., 9, Kyiv, Ukraine, 04071

PhD

Department of Wagons and Rolling Stock

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Published

2019-11-08

How to Cite

Оs’mak V., Ishchenko, V., Kulbovskyi, I., & Nechyporuk, A. (2019). Experimental determination of indicators of thermal state of refrigerator cars under operating conditions. Eastern-European Journal of Enterprise Technologies, 6(5 (102), 30–38. https://doi.org/10.15587/1729-4061.2019.183003

Issue

Vol. 6 No. 5 (102) (2019): Applied physics

Section

Applied physics

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Copyright (c) 2019 Viktor Оs’mak, Vadym Ishchenko, Ivan Kulbovskyi, Alina Nechyporuk

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