Air refrigeration system for annual cooling and cooling capacity adjusting method thereof

Abstract

The invention discloses an air refrigerating system for annual cooling and a cooling capacity adjusting method thereof. The refrigerating system is composed of a compressor, a driving motor of the compressor, a compression expansion machine, a cooler, a heat regenerator, an intercooler, a bypass air valve A, a bypass air valve B, a connecting pipeline and the like; compressed air exhausted by the compressor flows through the cooler, flows through the heat regenerator, exchanges heat with normal-pressure air from a data machine room and then enters an expander of the compression expander, and the expanded and cooled air enters an air supply system of the data machine room; the normal-pressure air from the data machine room passes through the heat regenerator, then enters a compressor of the compression expansion machine to be subjected to first-stage compression and enters the compressor to be subjected to second-stage compression; and when the atmospheric temperature is low, the two bypass air valves are opened for natural cooling. The refrigerating system takes air as a working medium, can operate in a two-stage compression refrigerating mode or a natural cooling mode, and is high in energy efficiency ratio and low in energy consumption.

Description

technical field [0001] The invention mainly relates to the field of cooling technology for year-round cooling, in particular to an air refrigeration system for year-round cooling and a cooling capacity adjustment method thereof, which belongs to the field of refrigeration technology. Background technique [0002] Data room or cabinet, power transmission and substation and other places where equipment is placed or inside the equipment need a cooling system throughout the year to dissipate the heat generated by the equipment or components to the atmosphere, maintain the ambient temperature in the equipment room or cabinet to meet the equipment requirements, and ensure that the equipment is normal job run. In order to make the above-mentioned cooling system operate efficiently throughout the year and achieve the purpose of energy saving and emission reduction, Chinese patent 201721170360.1 proposes a composite year-round cooling system with switchable working modes. This paten...

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Problems solved by technology

However, the above-mentioned convertible working mode combined with the year-round cooling system has a large difference in the circulation of the working medium in the summer and winter operating modes, and it is difficult to ensure that it can achieve good performance in both summer and winter operating conditions. Therefore, Chinese patent 201920112331.2 proposes a compound year-round cooling system with adjustable working fluid circulation volume. The working fluid circulation volume can be adjusted according to the working mode, which significantly improves the energy efficiency and reliability of its operation.

[0003] However, the above-mentioned composite year-round cooling system is complex in structure and high in cost, especially the internally circulated working medium is a greenhouse gas with a high greenhouse effect potential (GWP), which is gradually restricted in the Kigali Amendment of the Montreal Protocol. substances used

All these problems have affected the popularization and application of the above-mentioned composite year-round cooling system

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