Method for evaluating efficiency of refrigeration units based on compression cycle with economizer

Abstract

The transition to the so-called “digital economy” requires the development of automation tools, and, therefore, algorithms based on which it will be possible to create intelligent control systems.

At the same time, do not forget that the control and monitoring tools themselves are not an end in themselves. Automation must solve certain problems, relying on a data collection system (monitoring system). One of these tasks is energy saving. Since the share of electricity costs for refrigeration equipment is a significant part of the country’s energy balance, energy conservation issues are paid a lot of attention at the state level (Federal Law No. 261-FZ “On Energy Saving and Energy Efficiency and on Amending Certain Legislative Acts of the Russian Federation”).

Existing systems for monitoring the operating parameters of a refrigeration plant are often used only to detect emergencies and alarm them, however, an intelligent analysis system can be built on the basis of recorded data to optimize the operation of the refrigeration plant in real time.

This article describes the methodology for assessing the energy efficiency of refrigeration plants operating on a cycle with an economizer and allowing to evaluate both at the design stage and during the operation of the refrigeration plant, and allows to obtain a distribution of losses by elements and processes of the refrigeration plant.

Keywords

thermodynamic analysis / entropy-statistical method of thermodynamic analysis / refrigeration cycle with economizer

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