Novel natural cooling resource refrigerating system and control method thereof

Abstract

The invention discloses a novel natural cooling resource refrigerating system and a control method thereof. The system comprises a condenser, a liquid accumulator, a freezing medium circulating pump, an electronic expansion valve, an evaporator and a refrigeration compressor. The evaporator, the compressor, the condenser, the liquid accumulator, the freezing medium circulating pump and the electronic expansion valve are connected in sequence to form a circulation loop, wherein the evaporator and the condenser are connected through a first by-pass pipeline, and the liquid accumulator and the electronic expansion valve are connected through a second by-pass pipeline; the refrigeration compressor, the condenser, the liquid accumulator, the electronic expansion valve and the evaporator form an air cooling water chilling unit refrigeration cycle system, and the condenser, the liquid accumulator, the freezing medium circulating pump and the evaporator form a natural cooling resource refrigeration cycle system. Compared with the prior art, a freezing medium is used as a circulating medium, so the novel natural cooling resource refrigerating system has the advantages of an ethylene glycol scheme and a pure water scheme, and no special antifreeze process is needed, the cost can be reduced and the heat exchange efficiency and the convenience of maintenance are improved.

Description

technical field [0001] The invention relates to a refrigeration system and a control method thereof, in particular to an energy-saving refrigeration system and a control method thereof applied to a data center. Background technique [0002] Data center energy consumption generally refers to the overall energy consumption of IT equipment such as servers, switches, storage, refrigeration and air conditioning equipment, and power distribution batteries in the data center. The energy consumption of IT equipment and air conditioning system accounts for about 90% of the overall energy consumption of the data center, and the energy consumption of the air conditioning system as an auxiliary equipment of the data center accounts for about 40%, second only to the energy consumption of IT equipment. The cooling host occupies the core position, so improving the energy efficiency of the cooling host can effectively reduce the energy consumption of the data center. [0003] The free cold...

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Problems solved by technology

[0010] The most fundamental difference between the pure water solution and the ethylene glycol solution is that it solves the disadvantages of filling the entire pipeline system with antifreeze, separates the natural cold source system from the pipeline system, and uses an intermediate heat exchanger for heat exchange. The cold source circulation system is filled with antifreeze, and the circulation pump provides power circulation; the pure water solution can effectively reduce the amount of antifreeze filling and the difficulty of maintenance, but the pipeline system uses pure water circulation, and the parts exposed to the outdoors and the backup unit have winter The problem of antifreeze needs to be solved by adding heat tracing solutions to the unit; in addition, the use of intermediate heat exchangers for secondary heat exchange has heat transfer temperature differences, and the utilization efficiency of natural cold sources decreases, and the cost of intermediate heat exchangers is high and requires high cleanliness , thus increasing the maintenance workload

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