Water cooling air conditioning system combining natural cooling and mechanical refrigeration

Abstract

The invention discloses a water cooling air conditioning system combining natural cooling and mechanical refrigeration. The system comprises at least two sets of chilled water return pipes, at least two sets of chilled water supply pipes, first heat exchangers, second heat exchangers, first refrigerators, second refrigerators, first chilled water pumps and second chilled water pumps, wherein the first heat exchangers and the second heat exchangers are connected in parallel, and the first refrigerators and the second refrigerators are connected in parallel. According to the system, design and layout flexibility are improved, so that space is saved; the heat exchangers and the refrigerators do not need to be in one-to-one corresponding mode, and the number of set can be freely combined; moreenergy is saved, the minimum flow of the child water which flows through the refrigerator can be ensured, and the effective space of natural cooling of the heat exchangers is not affected; heat exchange area is increased and resistance is reduced, the heat exchange areas are increased and the heat exchange efficiency is improved, and the resistance is reduced, namely the energy consumption of thewater pumps is reduced; reliability is improved, parts of natural cooling mode heat exchangers do not need to be in one-to-one corresponding mode with the refrigerators, the number of the set can befreely combined to increase redundancy; and the number of the set of the water pumps, the refrigerators and the heat exchangers can be freely combined to form the redundancy, so that the reliability is improved.

Description

technical field [0001] The invention relates to the technical field of water-cooled air conditioners, in particular to a water-cooled air-conditioner system combining natural cooling and mechanical refrigeration. Background technique [0002] At present, the air-conditioning system of the data center consumes a lot of energy. In addition to the energy consumption of IT facilities, more than 70% of the energy is consumed by the air-conditioning system. Most of the air-conditioning systems in larger data centers are water-cooled air-conditioning systems. In order to make full use of outdoor low-temperature natural cooling sources in winter and transitional seasons, they are usually designed as a water-cooled air-conditioning system that combines natural cooling and mechanical refrigeration. It can be divided into three working modes throughout the year. In summer, when the outdoor temperature is high, only the chiller performs refrigeration through compression, referred to as ...

AI Technical Summary

Problems solved by technology

[0010] (1) Not energy efficient enough

In partial natural cooling mode, if the bypass valve needs to be adjusted, part of the chilled water supply and return water mix to lower the chilled water return temperature, reduce the effective space for natural cooling of the heat exchanger, and shorten the duration of partial natural cooling. Thereby restricting the energy-saving space of natural cooling heat exchange

[0011] (2) The space requirement is high, the layout is not flexible, and a single point may have many faults

The heat exchanger and chiller of each refrigeration unit must correspond one-to-one, which affects the flexibility of design and layout, especially in the case of limited space; the chilled water side of the refrigeration unit needs 4 electric valves to switch the working mode, and more valves increase the complexity of control increase the possible failure points and require a wider layout space

[0012] (3) The reliability is not high

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