CN214757525U

CN214757525U - Data center air conditioning system capable of utilizing natural cold source all year round

Info

Publication number: CN214757525U
Application number: CN202120548953.7U
Authority: CN
Inventors: 王振华
Original assignee: Guangzhou Landa Electronic Equipment Co ltd
Current assignee: Guangzhou Landa Electronic Equipment Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-11-16
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses a data center air conditioning system capable of utilizing natural cold source all year round, which comprises a cooling tower, a water pump, a surface cooler for primarily cooling server equipment and a mechanical refrigerating system for further cooling the server equipment; the mechanical refrigeration system comprises a compressor, a water-cooled condenser, a liquid storage tank, an expansion valve and an evaporator; the utility model discloses in, cooling tower and surface cooler can use throughout the year period to this can carry out preliminary heat transfer to the hot passageway air current of server equipment, cools down the hot passageway air current in advance, thereby reduces mechanical refrigerating system's capacity configuration, not only saves mechanical refrigerating system's cost, still reduces air conditioning system's operation energy consumption.

Description

Data center air conditioning system capable of utilizing natural cold source all year round

Technical Field

The utility model relates to an electronic equipment heat dissipation and ventilation field such as data center server, concretely relates to but data center air conditioning system of annual natural cold source of utilizing.

Background

At present, the requirements of data center server equipment and other ICT electronic equipment on the operating environment are gradually reduced, and according to the requirements of data center design specification GB 50174-2017, the environmental temperature of the data center on the air inlet side (cold channel) of the server is required to be 18-27 ℃, the relative humidity does not exceed 60%, and the dew point temperature is 5-15 ℃. Under the condition, an air conditioning system is mostly arranged in the traditional data center equipment, so that the refrigeration of the internal environment is carried out, and the damage of components due to overhigh temperature is prevented. The final exhaust temperature of electronic equipment such as a server is generally between 35 ℃ and 40 ℃ due to different designs of internal heating value and ventilation volume.

Most of data centers adopt a traditional air conditioning system (mainly a mechanical refrigeration system) to cool servers and other ICT electronic equipment in a machine room, and the energy consumption of the air conditioning system is a main component of the whole data center, so how to save the energy consumption of the air conditioning system of the data center is the most critical problem of energy saving of the data center, and the most effective method for solving the problem is to directly cool the equipment by utilizing a natural cold source and simultaneously reduce the refrigeration running time of a machine (a compressor).

The patent numbers are: the patent of CN202734118U discloses a large temperature difference air conditioning system for heat extraction of a data center, which is applied to a data center of a chilled water system, and utilizes a water-water heat exchanger to make cooling water directly exchange heat with chilled return water in a surface cooler at a cooling end in advance, and then the cooling water is cooled by an evaporator of a refrigerating unit, so as to reduce the heat load of the refrigerating unit, and then the large temperature difference operation mode of the chilled water is utilized to improve the return water temperature of the chilled water and select a pre-cooling type cooling tower to reduce the feed water temperature of the cooling water, thereby increasing the annual operation time of the water-water heat exchanger. The system greatly improves the temperature condition required by the starting operation of the natural cooling heat exchanger, and can even obtain the possibility of full-year operation of partial load in dry and cold areas.

However, in the above system, since the cooling water and the exhaust air of the server perform indirect heat exchange through the surface air cooler and the water-water heat exchanger at the end of the chilled water system, and the temperature difference between the cooling water and the exhaust air of the server must be guaranteed to be the temperature difference required for 2 heat exchanges, although the exhaust air of the data center (server) can be controlled to be above 35 degrees, the temperature of the cooling water obtained in summer in the hot and humid area exceeds 32 degrees, that is, the temperature of the cooling water in the cooling tower already exceeds 32 degrees, so that in most of the summer in the hot and humid area, the natural cooling heat exchanger (the heat exchanger connected with the cooling tower) cannot be started to cool the data center server, that is, direct cooling cannot be performed by using the cooling tower, so that the capacity of the mechanical refrigeration system still needs to be configured according to 100% of the heat load of the data center equipment, thus increasing the total investment of the air conditioning system.

Therefore, the prior art cannot operate all year round in a natural cooling mode in a damp and hot area, and the prior equipment also has the problems of complex structure and high cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, provide a can utilize natural cold source's data center air conditioning system all the year round to reduce mechanical refrigeration system's capacity configuration, save mechanical refrigeration system's cost and reduce the distribution of the air conditioning system power consumption load in the data center and account for than, thereby reach the purpose that both investment saving and energy consumption also reduced.

The utility model adopts the technical proposal that: a data center air conditioning system capable of utilizing natural cold sources all year round comprises a cooling tower, a water pump, a surface cooler and a mechanical refrigerating system, wherein the surface cooler is used for primarily cooling server equipment, and the mechanical refrigerating system is used for further cooling the server equipment;

the mechanical refrigeration system comprises a compressor, a water-cooled condenser, a liquid storage tank, an expansion valve and an evaporator; the compressor, the water-cooled condenser, the liquid storage tank, the expansion valve and the evaporator are sequentially connected through a connecting pipeline; the compressor is also connected with the evaporator;

the delivery port of cooling tower with the water inlet of water pump is connected, the delivery port of water pump with the water inlet of surface cooler is connected, the delivery port of surface cooler with water cooled condenser connects, water cooled condenser with the water inlet of cooling tower is connected.

Further, the device also comprises an electric regulating valve; and the electric regulating valve is arranged on a pipeline between the water-cooled condenser and the cooling tower.

The server air conditioner further comprises a fan for controlling the ventilation of the server equipment, a temperature sensor for monitoring the temperature of the server equipment and a controller for controlling the fan according to the temperature to regulate and control the ventilation of the server; the fan, the temperature sensor and the electric regulating valve are all connected with the controller. The surface air cooler and the evaporator of the mechanical refrigeration system are both used as cooling units, and form a closed circulating ventilation system through a fan, server equipment (or other heat source equipment and the like), an air inlet (cold) channel and an air exhaust (hot) channel. The surface cooler is used as a pre-cooling unit to firstly cool the air of the hot channel, and the evaporator is used as an auxiliary refrigerating unit to start mechanical refrigeration to cool the air of the hot channel for the second time under the condition that the refrigerating capacity of the surface cooler is insufficient.

Further, the fan is a variable frequency fan or an EC direct current fan.

To sum up, the utility model discloses following beneficial effect has:

1. in the utility model, as long as the water supply temperature of the cooling water is lower than the air exhaust temperature of the server, the surface air cooler of the natural cooling system has the cooling function to the hot channel airflow of the server equipment, and the fan in the indoor unit is controlled, the temperature of the hot channel airflow can be ensured to be between 35 ℃ and 40 ℃ (the general condition is controlled at 38 ℃), so that the server equipment can be cooled by the cooling water (generally below 32 ℃ and the extreme weather is below 35 ℃) even in summer in a damp and hot area, thereby realizing the natural cooling all the year round, namely, the cooling tower and the surface air cooler can be used for refrigerating all the year round;

2. the utility model discloses in, the cooling water is behind the surface cooler, and the heat that gets into mechanical refrigerating system's water-cooled condenser and mechanical refrigerating system obtained carries out the heat transfer, has further promoted the return water temperature of cooling water to can improve the heat exchange efficiency of cooling tower, one set of cooling tower of natural cooling system and mechanical refrigerating system sharing has not only simplified the system architecture simultaneously, has also saved the overlapping investment.

3. In the utility model, the hot channel airflow of the server equipment directly exchanges heat with the evaporator of the mechanical refrigeration system after passing through the naturally cooled surface cooler, and no chilled water is used as an intermediary system, so that the system is greatly simplified, the heat exchange efficiency and the system reliability are improved, and the system cost is reduced;

4. the utility model discloses in, cooling tower and surface cooler can use throughout the year, carry out preliminary heat transfer through the hot passageway air current of surface cooler to server equipment, lower the temperature to the hot passageway air current in advance to this reduces mechanical refrigerating system's capacity configuration, not only saves mechanical refrigerating system's investment, and the distribution that has also reduced data center air conditioning system power consumption accounts for the ratio, still greatly reduced air conditioning system operation energy consumption.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the present invention provided with a plurality of indoor units.

Wherein, 1, a compressor; 2. a water-cooled condenser; 3. a liquid storage tank; 4. an expansion valve; 5. an evaporator; 6. a cooling tower; 7. a water pump; 8. a surface cooler; 9. a fan; 10. an electric control valve.

Detailed Description

In order to make the objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not intended to indicate or imply that the referenced device or element must be in a particular orientation, constructed and operated, and therefore should not be construed as limiting the present invention.

The present invention will be further explained with reference to the embodiments of the drawings.

As shown in fig. 1-2, the utility model provides a data center air conditioning system capable of utilizing natural cold source all the year round, which comprises a cooling tower 6, a water pump 7, a surface cooler 8 for primarily cooling the server equipment, and a mechanical refrigeration system for further cooling the server equipment;

the mechanical refrigeration system comprises a compressor 1, a water-cooled condenser 2, a liquid storage tank 3, an expansion valve 4 and an evaporator 5; the compressor 1, the water-cooled condenser 2, the liquid storage tank 3, the expansion valve 4 and the evaporator 5 are sequentially connected in a circulating manner through connecting pipelines; wherein, mechanical refrigeration system adopts water-cooling direct expansion system, can carry out the secondary cooling to the hot-blast that server equipment produced in evaporimeter 5 department, discharges the heat and exchanges in the cooling water in water-cooled condenser 2 department.

The delivery port of cooling tower 6 with the water inlet of water pump 7 is connected, the delivery port of water pump 7 with the water inlet of surface cooler 8 is connected, the delivery port of surface cooler 8 with water cooled condenser 2 is connected, water cooled condenser 2 with the water inlet of cooling tower 6 is connected.

Wherein, the heat that the server equipment produced successively passes through surface cooler 8 and evaporimeter 5 at inclosed hot passageway, carries out primary cooling to the hot passageway air current earlier in surface cooler 8 department, and evaporimeter 5 is as supplementary refrigerating unit, carries out the secondary cooling to the hot passageway air current under the not enough condition of surface cooler 8 refrigerating capacity to this guarantees the cooling effect to the hot passageway air current, can be in certain extent with temperature control when making it get back to the server air intake again after surface cooler 8 and evaporimeter 5.

Further, an electric control valve 10 is also included; electric control valve 10 is installed water cooled condenser 2 with on the pipeline between the cooling tower 6, electric control valve 10 is used for adjusting the rivers flow between water cooled condenser 2 and the cooling tower 6.

Further, the system also comprises a fan 9 for controlling the ventilation of the server equipment, a temperature sensor for monitoring the temperature of the server equipment, and a controller for controlling the fan 9 according to the temperature to regulate and control the ventilation of the server; the fan 9 and the temperature sensor are electrically connected with the controller, wherein the controller adopts a PLC (programmable logic controller), the temperature sensor is used for monitoring the exhaust air temperature of the server equipment, namely the temperature of hot channel airflow, and when the temperature of the temperature sensor is higher than or lower than a set range, the rotating speed of the fan 9 is controlled through the controller, so that the exhaust air temperature of the server equipment is controlled to be between 35 and 40 ℃.

The utility model discloses in, water pump 7 carries surface cooler 8 with cooling tower 6's cooling water in, the hot passageway air current that produces server equipment is carried out cooling once in advance to the cooling water through surface cooler 8, and after the cooling of surface cooler 8 finishes, cooling water temperature risees and carries in water-cooled condenser 2, water-cooled condenser 2 further heats the cooling water at mechanical refrigerating system's high temperature high pressure refrigerant gas cooling for the in-process of low temperature high pressure liquid, thereby improve the temperature when cooling water gets back to cooling tower 6, make cooling tower 6 obtain higher heat exchange efficiency, through the regulation of electrical control valve 10 to control cooling water flow, steerable cooling water temperature who gets back to cooling tower 6, the computer lab dewfall that leads to excessively low when preventing cold area winter operation, and with this can let cooling tower 6 can last the whole year period work.

The utility model discloses in, cooling tower 6, water pump 7 and surface cooler 8 can be used throughout the year, carry out preliminary heat transfer through the hot passageway air current to the server equipment, cool down the hot passageway air current in advance to can reduce mechanical refrigerating system's capacity configuration, not only save mechanical refrigerating system's investment, still reduced the operation energy consumption.

In the utility model, the mechanical refrigeration system comprises a compressor 1, a water-cooled condenser 2, a liquid storage device, a thermal expansion valve 4 and an evaporator 5 which are connected in turn by refrigerant pipelines; meanwhile, the surface cooler 8, the water-cooled condenser 2, the electric regulating valve 10, the cooling tower 6 and the water pump 7 are circularly connected by a cooling water pipeline to form a natural cooling system; in addition, an evaporator 5 of a mechanical refrigeration system and a surface cooler 8 of a natural cooling system are used as cooling units, and a fan 9, server equipment (including other heat source equipment and the like), an air inlet (cold) channel and an air outlet (hot) channel form a closed circulating ventilation system. The surface cooler 8 serves as a pre-cooling unit to cool the air of the hot channel for the first time, and the evaporator 5 serves as an auxiliary cooling unit to cool the air of the hot channel for the second time under the condition that the refrigerating capacity of the surface cooler 8 is insufficient.

In addition, the mechanical refrigeration system, the surface cooler 8 and the fan 9 can also form an indoor unit for cooling the server equipment in a group of independent closed circulating ventilation systems, and the indoor unit can be provided with a plurality of units, so that the indoor unit corresponds to a plurality of groups of server equipment matched with heat loads and is arranged according to actual conditions, and the flexibility of deployment of the service equipment in the data center is ensured.

The fan 9 of the closed circulating ventilation system adopts a variable frequency fan or an EC direct current fan, the rotating speed of the fan 9 is controlled by a PLC controller to change the ventilation volume, when the load of server equipment is reduced, the rotating speed of the fan 9 is reduced, the ventilation volume is reduced, when the load of the server equipment is increased, the rotating speed of the fan 9 is increased, the ventilation volume is increased, the exhaust temperature of the server equipment is controlled to be 35-40 ℃, and therefore necessary high-temperature air flow is provided for heat exchange of cooling water in the surface air cooler 8.

The compressor 1 in the mechanical refrigeration system adopts the variable-capacity compressor 1, and the refrigeration capacity is controlled and adjusted through the PLC controller, so that the temperature of the airflow of the air inlet (cold) cooling channel is controlled within a specified range.

The utility model discloses, can set up many cooling towers 6 and many cooling water pump 7 parallelly connected, provide the cooling water for one or many air conditioning unit in the data center simultaneously. The water pump 7 adopts the variable frequency water pump 7, the rotating speed of the water pump 7 is controlled by the PLC, when the load in the data center machine room changes, the cooling water flow of each air conditioning unit needs to be adjusted, and the cooling water supply loop can still keep constant water supply pressure.

A variable frequency fan or an EC direct current fan is adopted as a cooling fan in the cooling tower 6, when the outdoor temperature in winter is reduced, the rotating speed of the fan is controlled through a PLC controller to reduce the ventilation volume, the heat exchange volume of the cooling tower 6 is reduced, the temperature of cold water is kept above a certain temperature, and the phenomenon that the temperature of the cooling water is too low to cause condensation inside a data center is avoided.

The utility model discloses two kinds of mode have:

in a summer mode, the temperature of cooling water is high, the surface air cooler conducts primary heat exchange on hot channel airflow of the server equipment, and the hot channel airflow is cooled in advance, so that the working load of a mechanical refrigeration system is reduced, the mechanical refrigeration system adopts a variable capacity system, and the output refrigerating capacity is automatically matched along with the heat exchange capacity of the surface air cooler and the heating capacity of the server equipment.

In the winter mode, the temperature of cooling water is reduced, the hot channel airflow of the server equipment is cooled only through the surface air cooler, the requirement of the inlet air temperature of the server can be met, a mechanical refrigeration system does not need to work at the moment, and the overall energy consumption of the system can be reduced.

The above is only the preferred embodiment of the present invention, the present invention is not limited to the above embodiment, there may be local minor structural modification in the implementation process, if it is right that various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, and belong to the claims and the equivalent technical scope of the present invention, then the present invention is also intended to include these modifications and variations.

Claims

1. The utility model provides a can utilize data center air conditioning system of nature cold source all the year round which characterized in that: the system comprises a cooling tower, a water pump, a surface cooler for primarily cooling the server equipment and a mechanical refrigeration system for further cooling the server equipment;

2. The data center air conditioning system capable of utilizing a natural cold source annually of claim 1, wherein: the device also comprises an electric regulating valve; and the electric regulating valve is arranged on a pipeline between the water-cooled condenser and the cooling tower.

3. The data center air conditioning system capable of utilizing a natural cold source annually of claim 1, wherein: the server air volume control system further comprises a fan for controlling the air volume of the server equipment, a temperature sensor for monitoring the temperature of the server equipment and a controller for controlling the fan to regulate and control the air volume of the server according to the temperature; the fan and the temperature sensor are electrically connected with the controller.

4. The data center air conditioning system capable of utilizing a natural cold source all year round according to claim 3, wherein: the fan is a variable frequency fan or an EC direct current fan.