WO2011137798A1

WO2011137798A1 - Method and device for heat dissipation

Info

Publication number: WO2011137798A1
Application number: PCT/CN2011/074388
Authority: WO
Inventors: 罗朝霞; 冯踏青; 唐文飞; 赵钧
Original assignee: 华为技术有限公司
Priority date: 2010-09-13
Filing date: 2011-05-20
Publication date: 2011-11-10
Also published as: CN102143671A

Abstract

A method and device for heat dissipation are provided. The device for heat dissipation includes: an evaporating end heat-exchanging module (11), used for controlling the liquid working medium to absorb the heat generated by a heat-generating device, and for evaporating the liquid working medium to the gas working medium; a condensing end heat-exchanging module (12), higher than the evaporating end heat-exchanging module (11) in the gravity direction, used for controlling a cooling source to absorb the heat of the gas working medium, and for condensing the gas working medium to the liquid working medium; a working medium cycle loop (13), used for introducing the evaporated gas working medium to the condensing end heat-exchanging module (12), and for introducing the condensed liquid working medium to reflux to the evaporating end heat-exchanging module (11). In the present invention, the gas working medium can be introduced to the cooling source for condensing without driving force, and the condensed liquid working medium can also be introduced to reflux to the heat-generating device without driving force. The whole cycle does not need driving force of driving device such as a pump, a fan, and so on, so that the energy consumption for heat dissipation is reduced.

Description

Heat dissipation method and device

The present application claims priority to Chinese Patent Application No. 2010-10281175.6, entitled "A Heat Dissipation Method and Apparatus", which is incorporated herein by reference.

Technical field

The present invention relates to the field of heat dissipation technologies, and in particular, to a heat dissipation method and device.

Background technique

ASHRAE TC9.9, one of the global computer room thermal management organizations, released the power consumption trend of the equipment room in 2005. As the power density of the equipment room increases sharply year by year, the power supply capacity and heat dissipation capacity of the equipment room are difficult to keep up with the power consumption of the equipment. development trend. Especially in the traditional storage room, the design heat dissipation capacity is generally 2 ~ 3kW, and the air conditioning utilization efficiency is low due to poor airflow management. When the new 8kW or even 20kW high-power equipment enters this traditional equipment room, it will bring great challenges to the heat dissipation and power distribution of the equipment room, which may lead to local hot spots or downtime events.

In recent years, with the advent of cloud computing, the single-machine power consumption in the equipment room has increased to 10KW ~ 30KW, and due to the characteristics of cloud computing itself, cloud computing data centers often have a large number of devices with power consumption of 10KW - 30KW, that is, The average cooling capacity of the equipment room often needs to reach 10kW or more for a single machine. This new demand has spawned a comprehensive upgrade of the new computer room in terms of heat dissipation and power supply.

In addition to solving the above-mentioned heat dissipation problems, energy saving and emission reduction and economic factors have another important reason for the booming development of the computer room heat management industry. In order to solve the problem of heat dissipation in the equipment room and achieve energy saving and emission reduction, the technicians proposed liquid cooling. The ETNO 2008 annual report clearly stated that when the single machine rejection power consumption is greater than 10 kW or the average power consumption of the equipment room is greater than 10 kW, the machine rejection liquid should be used. cold.

At present, the most commonly used liquid cooling system is to control the liquid working medium to absorb the heat of the heat generating equipment between the heating equipment of the machine, and use the driving force to push the liquid working medium that absorbs heat to other places, so that the liquid working medium will dissipate the heat. Go, and then transfer the heat-dissipating liquid working fluid back to the heat generating equipment to absorb the heat, so as to take away the heat of the heat generating equipment.

The inventors have found in practice that these liquid cooling systems require a pump or other driving force to drive the circulation of the liquid working medium when pushing the heat-absorbing liquid to other places and circulating the heat-dissipating liquid working medium to the heat generating device. Overcoming the cyclic resistance increases the energy consumption of heat dissipation. Summary of the invention

In the embodiment of the present invention, a heat dissipation method and device are provided for reducing energy consumption of heat dissipation. A heat sink comprising:

The evaporation end heat exchange module is configured to control the heat generated by the liquid working medium to absorb the heat generated by the heat generating device, and evaporate the liquid working medium into a gas working medium;

a condensation end heat exchange module, configured to control heat of the cold source absorbing gas working medium, to condense the gas working medium into a liquid working medium; the condensing end heat exchange module is higher in gravity direction than the evaporation end heat exchange module a working fluid circulation loop for introducing the vaporized gaseous working fluid into the condensation end heat exchange module, and recirculating the condensed liquid working fluid into the evaporation end heat exchange module.

A method of dissipating heat, including:

Controlling the liquid medium to absorb the heat generated by the heat generating device, and evaporating the liquid working medium into a gas working medium;

Introducing the vaporized gaseous working medium in a direction of gravity higher than a cold source of the heat generating device;

Controlling the heat source to absorb the heat of the gas working medium, condensing the gas working medium into a liquid working medium; and refluxing the condensed liquid working medium to the heat generating device.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

In the embodiment of the present invention, after the heat dissipating device controls the liquid working medium to absorb the heat generated by the heat generating device, the liquid working medium is evaporated into a gaseous working medium, and the gaseous working medium evaporated into the gas is introduced in the direction of gravity. The cold source of the thermal equipment causes the cold source to condense the gaseous working medium into a liquid working medium, and recirculates it into the heat generating device to re-absorb the heat. In the heat dissipating device provided by the embodiment of the invention, the gas working medium can be introduced into the cold source for condensation without the driving force, and the condensed liquid working fluid can be returned to the heat generating device without the driving force, and the whole cycle process does not need to be performed. The driving force of driving equipment such as pumps or fans reduces the energy consumption of heat dissipation.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying creative labor.

1 is a schematic structural view of a heat dissipation device according to a first embodiment of the present invention; 2 is a schematic structural view of a heat dissipating device according to a second embodiment of the present invention; FIG. 3 is a schematic structural view of a heat exchange module of an evaporating end of a heat dissipating device according to a second embodiment of the present invention;

4 is a schematic structural view of a condensation end heat exchange module of a heat dissipation device according to a second embodiment of the present invention;

5 is a schematic structural view of a heat dissipating device of a second connection mode according to a second embodiment of the present invention;

6 is a schematic structural view of a heat dissipating device of a third connection mode according to a second embodiment of the present invention;

FIG. 7 is a schematic flow chart of a heat dissipation method according to a third embodiment of the present invention.

detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without the creative work are all within the scope of the present invention.

The embodiment of the invention provides a heat dissipating device, which can reduce the heat dissipation of the liquid working medium and the gas working medium between the heat generating device and the cold source, thereby achieving the purpose of dissipating heat of the heat generating device. The corresponding cooling method. The details are described below separately.

Embodiment 1:

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a heat dissipating device according to a first embodiment of the present invention, and the heat dissipating device may include:

The evaporation end heat exchange module 11 is used for controlling the heat generated by the liquid working medium to absorb the heat generated by the heat generating device, and evaporating the liquid working medium into a gaseous working medium of the gas.

In the embodiment of the present invention, the liquid working medium may be water or other liquid distributed around the heat generating device, and the contact surface of the liquid working medium and the heat generating device is larger, and the faster the heat is absorbed.

The condensing end heat exchange module 12 is configured to control the heat of the cold source absorbing gas working medium, and condense the gas working medium into a liquid working medium; wherein the condensing end heat exchange module 12 is higher in the gravity direction than the evaporation end heat exchange module 11 .

In the embodiment of the invention, the cold source is used for cooling and heat absorption, and the heat is automatically turned from the object with high temperature. Objects with low temperature, cold source non-stop cooling, to ensure that the temperature is higher than the gas working medium, can absorb the heat of the gas working medium, so that the gas working medium is condensed into a liquid working medium. Among them, the larger the contact surface between the cold source and the gas working medium, the faster the heat absorption and condensation speed; the cold source may be air conditioner, cold air, chilled water, and the like.

Working fluid circulation loop 13, for introducing the vaporized gaseous working fluid into the condensation end heat exchange module 12, and refluxing the condensed liquid working fluid into the evaporation end heat exchange module 11;

That is, the working fluid circulation loop 13 is configured to introduce the vaporized gaseous working fluid into the liquid end of the condensation end heat exchange module 12 of the evaporation end heat exchange module 11 in the gravity direction, and to condense the condensation end heat exchange module 12 The mass reflux is introduced into the evaporation end heat exchange module 11 to reabsorb heat.

In one embodiment, the working fluid circulation loop 13 may be a network of conduits connected between the condensing end heat exchange module 12 and the evaporating end heat exchange module 11.

In the heat dissipation device provided by the embodiment of the present invention, the evaporation end heat exchange module 11 controls the liquid working medium to absorb the heat generated by the heat generating device, and then evaporates the liquid working medium into a gas working medium;

13 introducing a gas working medium evaporated to a gas in a gravity direction higher than a condensation end heat exchange module 12 of the heat generating device, so that the condensation end heat exchange module 12 condenses the gaseous working medium into a liquid working medium and passes through the working medium circulation ring. The road 13 is reflowed and introduced into the heat generating device to re-absorb the heat. In the heat dissipating device provided by the embodiment of the invention, the gas working medium can be introduced into the cold source for condensation without the driving force, and the condensed liquid working medium can be returned to the heat generating device without the driving force, and the whole cycle process does not need to be performed. The driving force of driving equipment such as pumps or fans reduces the energy consumption of heat dissipation.

Embodiment 2:

Referring to FIG. 2, FIG. 2 is a schematic diagram of heat dissipation of a machine room according to a second embodiment of the present invention. As shown in FIG. 2, there are three heat generating devices in the machine room, which are a heat generating device 201, a heat generating device 202, and a heat generating device 203. . The heat generating device 201, the heat generating device 202, and the heat generating device 203 may be machines that are normally working in the equipment room.

The heat sink of the equipment room includes:

The evaporation end heat exchange module 21 installed in the heat generating device 201, the evaporation end heat exchange module 22 installed in the heat generating device 202, and the evaporation end heat exchange module 23 installed in the heat generating device 203; wherein, the evaporation end heat exchange module 21 a gas working medium for controlling the liquid medium to absorb the heat generated by the heat generating device 201 and evaporating the liquid working medium into a gas; the evaporation end heat exchange module 22 is for controlling the liquid working medium to absorb the heat generated by the heat generating device 202, and a gas working medium for evaporating a liquid working substance into a gas; an evaporation end heat exchange module 23 The gas working medium for controlling the liquid working medium to absorb the heat generated by the heat generating device 203 and evaporating the liquid working medium into a gas.

The heat sink of the equipment room further includes:

The condensing end heat exchange module 24 installed in the gravity direction is higher than the evaporation end heat exchange module 21, the evaporation end heat exchange module 22, and the evaporation end heat exchange module 23. The condensing end heat exchange module 24 is configured to control the heat of the gas working medium generated by the cold source absorption evaporation end heat exchange module 21, the evaporation end heat exchange module 22, and the evaporation end heat exchange module 23, and condense the gas working medium into a liquid working quality.

Among them, the cold source may be air conditioner, cold air, chilled water, etc., for cooling and absorbing the heat of the gas working medium to achieve the purpose of condensing gas.

The heat sink of the equipment room further includes a working fluid circulation loop 25:

The working fluid circulation loop 25 is a pipeline network for the gas working fluid outlet of the evaporation end heat exchange module 21, the evaporation end heat exchange module 22, and the evaporation end heat exchange module 23 and the gas working fluid inlet of the condensation heat exchange module 24. Connected, the gas working medium generated by the evaporation end heat exchange module 21, the evaporation end heat exchange module 22 and the evaporation end heat exchange module 23 can be automatically introduced into the condensation heat exchange module 24 for condensation; and, for transferring the evaporation end heat exchange The liquid working medium inlet of the module 21, the evaporation end heat exchange module 22 and the evaporation end heat exchange module 23 is connected to the liquid working outlet of the condensing heat exchange module 24, so that the liquid working medium condensed by the condensing heat exchange module 24 is automatically returned to the evaporation. The end heat exchange module 21, the evaporation end heat exchange module 22, and the evaporation end heat exchange module 23 re-absorb.

In the equipment room shown in Figure 2, the heat sink can also be installed with a common evaporation end heat exchange module for simultaneously controlling the heat generated by the liquid working fluid absorption heat generating device 201, the heat generating device 202, and the heat generating device 203. The liquid working medium is evaporated into a gas working medium of gas, and is introduced into the condensing heat exchange module 24 through the working medium circulation loop 25 for condensation, and the condensed liquid working medium is automatically recirculated and introduced into the common evaporation end heat exchange module, so that the common evaporation end is made. The heat exchange module can control the liquid working medium to re-heat the heat generating device 201, the heat generating device 202, and the heat generating device 203.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of an evaporation end heat exchange module 21 according to a second embodiment of the present invention. As shown in FIG. 3, the right side of the evaporation end heat exchange module 21 contacts the heat generating device to absorb heat generated by the heat generating device, and the left side includes a gas working medium outlet and a liquid working medium inlet, and the liquid working medium enters the liquid working medium inlet. After absorbing the heat of the heat generating equipment, it is evaporated into a gas working medium, and the gas working medium is further exported from the gas working medium outlet. Since the continuous flow of liquid working fluid is returned to the evaporative heat exchange module, this The liquid working fluid is continuously evaporated into a gaseous working medium, the working medium is increased in volume, and the volume is increased, and is automatically pressed to the outlet, so that no driving force is required to reach the condensing heat exchange module 24 according to the connection of the circulation loop.

The structure diagram of the evaporation end heat exchange module 22 and the evaporation end heat exchange module 23 can be similar to the evaporation end heat exchange module 21, which is not repeated in this embodiment.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a condensing heat exchange module 24 according to a second embodiment of the present invention. As shown in FIG. 4, one side of the condensing heat exchange module includes a cold source inlet and a cold source outlet, and the cold source can chill water or cold air, and the cold source circulates from the cold source inlet into the condensing heat exchange module to absorb the gas working medium. The heat flows out of the cold source outlet. The other side of the condensing heat exchange module 24 includes a gas working fluid inlet and a liquid working fluid outlet, and the working fluid circulation loop 24 introduces the gas working fluid generated by the evaporating heat exchange module 21, the evaporating heat exchange module 22, and the evaporating heat exchange module 23. The gas working inlet of the condensing heat exchange module 24, with the heat source of the gas working medium taken away, the gas working medium is condensed into a liquid working medium, and the liquid working medium flows out from the liquid working medium outlet, with the working medium circulation ring The connection of the road is automatically returned to the evaporative heat exchange module 21, the evaporative heat exchange module 22, and the evaporative heat exchange module 23.

In this embodiment, according to the number of the evaporative heat exchange module and the condensing heat exchange module, the pipeline network connection of the working fluid circulation loop is also different. Referring to Figure 5, Figure 5 is a schematic diagram of the connection of three evaporative heat exchange modules and a condensing heat exchange module; see Figure 6, Figure 6 is a schematic diagram of the connection of three evaporative heat exchange modules and two condensing heat exchange modules. As long as the gas working fluid outlet of each evaporating heat exchange module is connected to the gas working fluid inlet of at least one condensing heat exchange module, and at least one liquid working fluid outlet of the condensing heat exchange module is connected to the liquid working medium inlet of the evaporating heat exchange module can.

The heat dissipating device of the embodiment controls the liquid working medium to absorb the heat generated by the heat generating device, evaporates the liquid working medium into a gas working substance of the gas, controls the heat of the cold source to absorb the working medium of the gas, and condenses the working medium of the gas into a liquid working medium. Thereby, the vaporized working fluid is introduced into the cold source with the height difference for condensation, and the condensed liquid working fluid is refluxed and introduced into the low-heating heat generating device, and the gas working fluid is automatically pushed to the high place with the pipeline without the driving force. The condensing equipment, the liquid working medium condensed at a high place does not need driving force, and the height difference can be returned to the heat generating equipment along with the pipeline. The driving process of the driving equipment such as a tribute or a fan is not required in the whole cycle, and the energy consumption is reduced.

Embodiment 3:

Referring to FIG. 7, FIG. 7 is a schematic flowchart diagram of a heat dissipation method according to a third embodiment of the present invention. The heat dissipation method may include the following steps: 701. Control a liquid working medium to absorb heat generated by the heat generating device, and evaporate the liquid working medium into a gas working medium of the gas;

702. The gas working medium evaporated in step 701 is introduced into a cold source for condensation, and the position of the cold source is higher than the heat generating device in the direction of gravity;

For example, the gaseous working fluid evaporated in step 701 can be introduced through the working fluid circulation loop in a direction of gravity higher than the cold source of the heat generating device. Wherein, the working cycle can be a pipeline for transporting gaseous working fluid and liquid working fluid; the cold source is air conditioning, chilled water, cold air or refrigerant.

703. Control the heat of the cold source to absorb the working fluid of the gas, and condense the gaseous working medium into a liquid working medium;

704. Return the liquid working medium condensed in step 703 to the heat generating device.

For example, the liquid condensate from step 704 can be recirculated to the heat generating device through a working fluid circulation loop.

In the heat dissipation method provided in the third embodiment, after the liquid working medium is controlled to absorb the heat generated by the heat generating device, the liquid working medium is evaporated into a gaseous working medium, and the gaseous working medium evaporated into the gas is introduced in the direction of gravity. In the cold source of the heat generating equipment, the cold source condenses the gas working medium into a liquid working medium, and returns to the heat generating device to re-absorb the heat. In the heat dissipation method provided by the embodiment of the invention, the gas working medium can be introduced into the cold source for condensation without the driving force, and the condensed liquid working medium can be returned to the heat generating device without the driving force, and the whole cycle process does not need to be performed. The driving force of driving equipment such as pumps or fans reduces the energy consumption of heat dissipation.

A person skilled in the art may understand that all or part of the various steps of the foregoing embodiments may be completed by a program instructing related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: U disk, read only memory (ROM), random access memory (RAM), disk or optical disk, etc.

The heat dissipation method and device provided by the embodiments of the present invention are described in detail above. The principles and embodiments of the present invention are described in the following. The description of the above embodiments is only for helping to understand the present invention. The method and its core idea; at the same time, those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. In summary, the content of the specification should not be construed as being limit.

Claims

Rights request

A heat dissipation device, comprising:

The heat sink according to claim 1, wherein the cold source is an air conditioner, chilled water, cold air or a refrigerant.

3. The heat dissipation device according to claim 1, wherein the liquid working medium in the evaporation end heat exchange module is distributed around the heat dissipation device.

4. The heat sink according to claim 1, wherein the working fluid circulation loop is a conduit for transporting a gaseous working fluid and a liquid working fluid.

5. A method of dissipating heat, characterized in that it comprises:

The heat dissipation method according to claim 5, wherein the introducing the vaporized gaseous working medium into the cold source in the direction of gravity higher than the heat generating device comprises:

The vaporized gaseous working fluid is introduced into the cold source of the heat generating device by the working medium circulation loop in the direction of gravity.

7. The heat dissipation method according to claim 5, wherein the returning the condensed liquid working material to the heat generating device comprises:

The condensed liquid working fluid is returned to the heat generating device through a working fluid circulation loop.

The heat dissipation method according to any one of claims 5 to 7, wherein the cold source is an air conditioner, chilled water, cold air or a refrigerant.