The Dynamic Model of Vapor-Compression Cooling System of Power Machines

Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy


Release:

2018, Vol. 4. №2

Title: 
The Dynamic Model of Vapor-Compression Cooling System of Power Machines


For citation: Karelin D. L. 2018. “The Dynamic Model of Vapor-Compression Cooling System of Power Machines”. Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy, vol. 4, no 2, pp. 22-42. DOI: 10.21684/2411-7978-2018-4-2-22-42

About the author:

Dmitry L. Karelin, Cand. Sci. (Tech.), Associate Professor, Department of High-Energy Processes and Aggregates, Naberezhnye Chelny Institute (Kazan Federal University Branch); karelindl@mail.ru

Abstract:

This article presents a dynamic model of a vapor-compression cooling system, considering the mass of the working medium contained in the volume of the heat exchanger-evaporator, the heat exchanger-condenser, and the dynamics of the vapor content of the working medium at the inlet to the heat exchanger-condenser. The author has revealed and explained the presence of “dips” in the transient characteristics of temperature and evaporation pressure at the first second after the system start from standby mode, as well as the influence of the initial values of the ambient temperature on them. He shows that in order to study the transient characteristics of vapor-compression cooling systems, it is necessary to use criterial heat transfer equations that take into account the entire two-phase flow mode map during boiling, as well as to account for the overheating zones and possible supercooling of the working medium at the compressor outlet and inlet.

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