WO2016165279A1

WO2016165279A1 - Water side natural cooling system and water side natural cooling method

Info

Publication number: WO2016165279A1
Application number: PCT/CN2015/090018
Authority: WO
Inventors: 张炳华; 李代程; 周天宇
Original assignee: 北京百度网讯科技有限公司
Priority date: 2015-04-17
Filing date: 2015-09-18
Publication date: 2016-10-20
Also published as: CN104776531A

Abstract

A water side natural cooling system, comprising an air-conditioning terminal (11), configured to produce cold wind based on chilled water; a cooling tower (12) and a plate heat exchanger (13), configured to cool the chilled water conveyed to the air-conditioning terminal (11) when an outdoor ambient temperature is lower than a preset temperature; a water supply unit (14), configured to convey the chilled water into the air-conditioning terminal (11) when the outdoor ambient temperature is higher than the preset temperature, wherein tap water is used as the chilled water; and a cooling device, configured to cool the tap water when the tap water cannot meet a temperature requirement of the chilled water, and obtain, based on the cooled tap water, the chilled water conveyed to the air-conditioning terminal (11). Also comprised is a water side natural cooling method.

Description

Water side natural cooling system and water side natural cooling method

Cross-reference to related applications

The present application claims the priority of the Chinese patent application No. 201510185466.8, filed on April 17, 2015, by the Beijing Baidu Netcom Technology Co., Ltd., entitled "Water Side Natural Cooling System and Water Side Natural Cooling Method".

Technical field

The invention relates to the technical field of data center air conditioning systems, in particular to a water side natural cooling system and a water side natural cooling method.

Background technique

At present, the overall design of the data center is paying more and more attention to the efficiency and cost advantages of the server working at higher ambient temperatures. Information Technology (IT) equipment suppliers are also working to increase the airflow allowed by the server. Temperature limits, by continuously optimizing the internal layout of IT equipment and selecting temperature-resistant electronic components, the server has been able to operate normally at an inlet air temperature of 35 ° C or higher.

Air conditioning system solutions commonly used in data centers for high-temperature servers generally have two types: a water-side natural cooling system that uses water for cooling, and a wind-side natural cooling system that uses wind for cooling. In the prior art, the water side natural cooling system is composed of a cooling tower, a plate heat exchanger, a cold machine, a circulation pump, an air conditioner terminal, and the like, and uses a cooling tower and a plate heat exchanger to prepare chilled water in winter and spring and autumn, without Turn on the cold machine; turn on the cold mechanism to take chilled water in summer.

However, the shortcomings of the existing water side natural cooling are mainly reflected in: the cold machine does not operate for most of the year, and only operates in extreme summer conditions. However, in order to ensure that the data center is available all year round, the cold machine has to be configured, and the initial investment and operating costs are high.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

To this end, it is an object of the present invention to provide a water side natural cooling system that can eliminate the need to configure a cold machine, reduce costs, and save energy and reduce emissions.

Another object of the present invention is to provide a water side natural cooling method.

In order to achieve the above object, a water side natural cooling system according to a first aspect of the present invention includes: an air conditioner end for generating cold air according to chilled water; a cooling tower and a plate heat exchanger for lowering an outdoor ambient temperature than a preset At the temperature, the chilled water delivered to the end of the air conditioner is cooled; the water supply unit is used for the outdoor environment temperature being greater than the preset temperature At the time, the tap water is sent to the end of the air conditioner as chilled water; and the cooling device is configured to cool the tap water when the tap water cannot meet the chilled water temperature requirement, and obtain the chilled water sent to the end of the air conditioner according to the tap water after the temperature drop.

The water side natural cooling system proposed by the embodiment of the first aspect of the present invention can reduce cost and save energy and reduce emissions without setting a cold machine.

In order to achieve the above object, the water side natural cooling method according to the second aspect of the present invention includes: using a natural cooling device or tap water to cool the chilled water delivered to the end of the air conditioner, or conveying the chilled water to the end of the air conditioner; The chilled water produces cold air.

The water side natural cooling method proposed by the embodiment of the second aspect of the present invention can reduce cost and save energy and reduce emissions without setting a cold machine.

An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory; one or more programs, the one or more programs being stored in the memory when the one or more When the processor is executed: the method according to any of the first aspect of the invention is performed.

Embodiments of the present invention also provide a non-volatile computer storage medium having one or more modules stored when the one or more modules are executed: performing the first aspect of the present invention The method of any of the preceding claims. The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic view showing a first operation mode of a water side natural cooling system according to an embodiment of the present invention;

2 is a schematic diagram of a second operation mode of a water side natural cooling system according to an embodiment of the present invention;

3 is a schematic diagram of a third operation mode of a water side natural cooling system according to an embodiment of the present invention;

4 is a schematic flow chart of a water side natural cooling method according to another embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar modules or modules having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting. Rather, the invention is to cover all modifications, modifications and equivalents within the spirit and scope of the appended claims.

1 is a schematic structural view of a water side natural cooling system according to an embodiment of the present invention. The system includes an air conditioner end 11, a cooling tower 12, a plate heat exchanger 13, a water supply unit 14, and a cooling device.

Optionally, the cooling device may be an ice storage tank, or the cooling device is a phase change cold storage device.

As shown in FIG. 1, the cooling device is an ice storage tank 15 as an example.

Optionally, the system may further include a variable frequency pump. As shown in FIG. 1 , the variable frequency pump may be respectively disposed in a cooling tower circuit, an air conditioning end circuit, and a tap water supply branch to respectively provide circulation of cooling water, chilled water and tap water. power.

The system in this embodiment can be used to correspond to three operating modes, which are respectively referred to as a first operating mode, a second operating mode, and a third operating mode.

The three operating modes can be applied to different outdoor ambient temperatures respectively. In different operating modes, the chilled water delivered to the end of the air conditioner is cooled in different ways. Referring to Figures 1-3, respectively, the path of water transport in the corresponding operating mode is shown with thick black lines.

Referring to Fig. 1, in the first operation mode, there are two loops of water circulation, namely a cooling water circuit and a chilled water circuit, wherein the water circulating in the cooling water circuit is cooling water, and the equipment passing through the cooling water circuit includes a cooling tower and Plate heat exchangers, in addition, in order to enhance the power of the water cycle, a variable frequency pump can be installed on the cooling water circuit. The water circulating in the chilled water circuit is chilled water. The equipment passing through the chilled water circuit includes a plate heat exchanger and an air conditioner end. Similarly, in order to enhance the power of the water cycle, a variable frequency pump can be arranged on the chilled water circuit.

It will be appreciated that the cooling water and the chilled water may be separately delivered to the cooling water circuit and the chilled water circuit using different transport paths (not shown in Figure 1).

The cooling tower can be specifically an open cooling tower that can dissipate the heat generated by the data center to the atmosphere by evaporative cooling.

The end of the air conditioner is water-cooled, and may be in the form of a precision air conditioner, an air conditioner in a row, a combined air conditioner unit, and a water-cooled backboard.

When the outdoor ambient temperature (specifically, the outdoor ambient wet bulb temperature) is less than the preset temperature, the cooling tower can cool the cooling water, and after the cooled cooling water is delivered to the plate heat exchanger, the freezing in the other circuit can be performed. The water is cooled down, and the chilled water after cooling can be sent to the end of the air conditioner. The chilled air is cooled by the cooled water at the end of the air conditioner, and the cold air can cool the IT equipment in the data center.

Referring to Fig. 2, in the second operation mode, tap water is used as the chilled water at the end of the air conditioner. The tap water can be specifically municipal tap water, as shown in Fig. 2, the water supply unit can be specifically a non-negative pressure water supply unit.

When the outdoor ambient temperature is greater than the preset temperature, the tap water can be sent to the end of the air conditioner by the water supply unit. The tap water is used as the chilled water at the end of the air conditioner. After receiving the tap water at the end of the air conditioner, the cold water of the tap water can be used to generate the cold air, and the IT of the data center The device is cooled. In addition, in order to enhance the power of the water cycle, the tap water is transported. A variable frequency pump can be installed on the branch to the end of the air conditioner.

In addition, after the tap water as the chilled water passes through the end of the air conditioner, the temperature rises, and the tap water outputted from the end of the air conditioner can be sent to the reservoir 16 through the variable frequency pump, and the water in the reservoir 16 can serve as a sink for the cooling tower, thereby In one mode of operation, the water in the cooling water circuit can come from the reservoir 16.

In the summer, the wet bulb temperature is higher during the day, and the second operation mode can be started, and the night wet bulb temperature is lower, and the first operation mode can be started.

It can be understood that the above preset temperature can be preset according to actual working conditions, weather and the like.

Referring to Figure 3, in the third operation mode, when the temperature of the tap water is greater than the cooling water temperature requirement, as shown in Fig. 3, the tap water can be divided into two branches after passing through the water supply unit, one branch is through the ice storage tank, and the other is through the ice storage tank. The branch road is not through the ice storage tank, and the tap water passing through the ice storage pool is mixed with the tap water that has not passed through the ice storage tank, so that the mixed water temperature satisfies the working condition of the cooling water temperature, and after obtaining the mixed water satisfying the working condition, The mixed water is supplied as cooling water to the end of the air conditioner.

Ice is stored in the ice storage pool. After the tap water enters the ice storage pool, the tap water is cooled by the ice. Among them, ice can be produced by an ice maker (not shown).

In addition, the ice machine can perform ice making at the peak and valley electricity price stage, for example, to complete ice making at night, so that the peak and valley electricity prices can be fully utilized, and the operating cost can be saved.

It can be understood that the cooling of the tap water is not limited to the ice storage tank, and other methods can be used for cooling, for example, the tap water storage device is used to cool the tap water, and correspondingly, when the phase change cold storage device is used, the chilled water is used. It is tap water after cooling by the phase change cold storage device.

In order to reduce the cost, the phase change cold storage device can also cool the tap water in the peak and valley electricity price stage, such as the night, and can use the already prepared ice to cool the tap water during the day.

In this embodiment, it is not necessary to provide a cold machine, and the cost and energy saving can be reduced. The embodiment minimizes the mechanical refrigeration, fully utilizes the outdoor natural cooling capacity and the cooling capacity of the tap water, and greatly saves the operating energy consumption of the refrigeration system, and is simple and reliable. This embodiment fully utilizes the peak-to-valley electricity price policy to save data center operating costs.

4 is a schematic flow chart of a water side natural cooling method according to another embodiment of the present invention, the method includes:

S41: The chilled water delivered to the end of the air conditioner is cooled by a natural cooling device or tap water, or the chilled water is supplied to the end of the air conditioner.

Specifically, it may include:

When the outdoor ambient temperature is lower than the preset temperature, the cooling tower and the plate heat exchanger are used to cool the chilled water delivered to the end of the air conditioner; or

When the outdoor ambient temperature is greater than the preset temperature, the water supply unit is used to transport the tap water as chilled water to the end of the air conditioner; or

When the tap water cannot meet the chilled water temperature requirement, the tap water is cooled by a cooling device, and the chilled water sent to the end of the air conditioner is obtained according to the tap water after the cooling.

Specifically, according to the outdoor ambient temperature or the temperature of the tap water, the three operating modes may be divided into a first operating mode, a second operating mode, and a third operating mode. In the first operating mode, the cooling tower and the plate type are used. The heat exchanger cools the chilled water. In the second operation mode, the tap water is used as chilled water. In the third operation mode, the tap water is cooled, and the mixed water of the tap water after cooling and the tap water that has not been cooled is used as the chilled water. Or, the tap water after cooling is used as chilled water. For the specific content of each operation mode, refer to the related description in the foregoing embodiment, and details are not described herein again.

Optionally, when the cooling device is an ice storage pool, the method further includes:

Ice making was carried out using an ice maker, and the prepared and added to the ice storage tank.

After adding ice to the ice storage tank, the tap water can be cooled by ice to reduce the water temperature of the tap water.

Optionally, the ice maker operates in a peak-to-valley price stage, or the phase-change cold storage device performs cooling in a peak-to-valley price stage.

By using peak and valley electricity prices, costs can be effectively reduced.

Optionally, the method may further include: storing tap water outputted through the end of the air conditioner to the water reservoir, and using the water storage pool as a water pool of the cooling tower.

Resource utilization can be improved by recycling tap water output through the end of the air conditioner.

S42: Producing cold air according to chilled water.

The cooled water after cooling is sent to the end of the air conditioner, or the tap water is sent to the end of the air conditioner as chilled water, or the mixed water of the tap water after cooling and the tap water that is not cooled are transported as chilled water to the end of the air conditioner, and the end of the air conditioner can be Use cold water with low water temperature to generate cold air, and use cold air to cool IT equipment in the data center.

Embodiments of the present invention also provide a non-volatile computer storage medium having one or more modules stored when the one or more modules are executed: performing the first aspect of the present invention The method of any of the preceding claims.

It should be noted that in the description of the present invention, the terms "first", "second" and the like are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, "plurality" unless otherwise stated The meaning is two or more.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a particular logical function or process. And the scope of the preferred embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in an opposite order depending on the functions involved, in the order shown or discussed. It will be understood by those skilled in the art to which the embodiments of the present invention pertain.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

One of ordinary skill in the art can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, one or a combination of the steps of the method embodiments is included.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as stand-alone products, may also be stored in a computer readable storage medium.

The above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A water side natural cooling system, comprising:

The end of the air conditioner is used to generate cold air according to the chilled water;

a cooling tower and a plate heat exchanger for cooling the chilled water delivered to the end of the air conditioner when the outdoor ambient temperature is less than a preset temperature;

a water supply unit for conveying tap water as chilled water to the end of the air conditioner when the outdoor ambient temperature is greater than a preset temperature;

The cooling device is configured to cool the tap water when the tap water cannot meet the chilled water temperature requirement, and obtain the chilled water delivered to the end of the air conditioner according to the tap water after the cooling.
The system of claim 1 wherein:

The cooling device is an ice storage tank, and the chilled water is mixed water of tap water after passing through the ice storage pool and tap water that has not passed through the ice storage pool; or

The cooling device is a phase change cold storage device, and the chilled water is tap water after passing through a phase change cold storage device.
The system of claim 2, wherein when the cooling device is an ice storage pool, the system further comprises:

An ice maker for making ice and adding it to the ice storage tank.
The system according to claim 3, wherein said ice maker operates in a peak-to-valley electricity price phase, or said phase-change cold storage device performs refrigeration in a peak-to-valley electricity price phase.
The system of any of claims 2-4, further comprising:

A water reservoir for storing tap water outputted through the end of the air conditioner and serving as a sink for the cooling tower.
The system of any of claims 1-5, further comprising:

A variable frequency pump powers the circulation of water.
A water side natural cooling method, comprising:

Cooling the chilled water delivered to the end of the air conditioner with natural cooling equipment or tap water, or delivering chilled water to the end of the air conditioner;

Produces cold air based on chilled water.
The method according to claim 7, wherein the cooling of the chilled water delivered to the end of the air conditioner is performed by using a natural cooling device or tap water, or the chilled water is delivered to the end of the air conditioner, including:

When the outdoor ambient temperature is lower than the preset temperature, the cooling tower and the plate heat exchanger are used to cool the chilled water delivered to the end of the air conditioner; or

When the outdoor ambient temperature is greater than the preset temperature, the water supply unit is used to deliver tap water as chilled water to the air conditioner. End; or,

When the tap water cannot meet the chilled water temperature requirement, the tap water is cooled by a cooling device, and the chilled water sent to the end of the air conditioner is obtained according to the tap water after the cooling.
The method according to claim 8, wherein when the cooling device is an ice storage pool, the method further comprises:

Ice making was carried out using an ice maker, and the prepared and added to the ice storage tank.
The method according to claim 9, wherein said ice maker operates in a peak-to-valley electricity price phase, or said phase-change cold storage device performs refrigeration in a peak-to-valley electricity price phase.
The method according to any one of claims 7 to 10, further comprising:

The tap water outputted through the end of the air conditioner is stored in the reservoir, and the reservoir is used as a sink for the cooling tower.
An electronic device, comprising:

One or more processors;

Memory

One or more programs, the one or more programs being stored in the memory, when executed by the one or more processors:

Performing the method of any of claims 7-11.
A non-volatile computer storage medium characterized in that the computer storage medium stores one or more modules when the one or more modules are executed:

Performing the method of any of claims 7-11.