Cabinet-based direct evaporative cooled machine room air-conditioning system

Abstract

The invention discloses a cabinet-based direct evaporative cooled machine room air-conditioning system. The system comprises a refrigerant circuit, an oil return circuit and a cooling water circuit. According to the cabinet-based direct evaporative cooling machine room air-conditioning system, refrigerants are directly delivered to a server and are directly evaporated to cool the server through evaporators arranged on the server. Compared with a machine room air-conditioning system cooled by supplying air conventionally, the system has the advantages of high heat dissipation power, high efficiency, small size and the like. Compared with a conventional refrigerant evaporative cooled air-conditioning system, the machine room air-conditioning system directly delivers all liquid to the evaporators through a low-pressure circulating barrel and a first variable frequency magnetic force pump, so that the system has the advantages that the pressure drops of refrigerants in the evaporators are small; the back temperature of a compressor is low, and a heat exchange system is large; through the arrangement of the oil return circuit, the problem of oil return of the system is solved creatively, and the system has the characteristics of high comprehensive energy efficiency and the like.

Description

technical field [0001] The invention relates to an air-conditioning system for a data center computer room that realizes high efficiency and energy-saving benefits, and belongs to the technical field of design and manufacture of refrigeration and air-conditioning systems. Background technique [0002] With the vigorous development of my country's computer and communication industry, especially the rise of the concept of "cloud computing", large-scale operational data computer rooms have grown rapidly. There are many internal communication devices in the server room, and the heat generation is large, and the heat generation per square meter can reach several kilowatts or even tens of kilowatts. In order to maintain the temperature and humidity requirements required by the computer room, the server room usually requires the air conditioning system to provide cooling throughout the year, which consumes a lot of energy. The rapid development of data centers and their high ene...

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Problems solved by technology

[0005] Technical problem: The purpose of the present invention is to provide a solution to the problem of low heat dissipation density and high fan energy consumption of conventional computer room air-conditioning systems that use cold air to dissipate heat, and large evaporation pressure drop and high return air temperature in common computer room air-conditioning systems that use refrigerant evaporation to dissipate heat. And because the gas-liquid two-phase enters the evaporator, the heat transfer coefficient of the evaporator is low, and the heat transfer area of ​​the evaporator is not fully utilized. A new type of high-efficiency computer room air conditioning system based on direct evaporative cooling of the cabinet

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