CN113654129A - Data center refrigeration air-conditioning system - Google Patents
Data center refrigeration air-conditioning system Download PDFInfo
- Publication number
- CN113654129A CN113654129A CN202010398784.3A CN202010398784A CN113654129A CN 113654129 A CN113654129 A CN 113654129A CN 202010398784 A CN202010398784 A CN 202010398784A CN 113654129 A CN113654129 A CN 113654129A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- water
- inlet
- data center
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 47
- 238000005057 refrigeration Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 294
- 230000001502 supplementing effect Effects 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000008400 supply water Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 15
- 239000000498 cooling water Substances 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 238000007710 freezing Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
Abstract
The embodiment of the invention provides a refrigeration air-conditioning system of a data center, which comprises a reclaimed water reservoir, a water chilling unit, a plate heat exchanger and an air-conditioning tail end, wherein the water chilling unit at least comprises a condenser and an evaporator; a first water pump is arranged at the downstream of the reclaimed water reservoir, and an outlet of the first water pump is connected with an inlet of the condenser and a first inlet of the plate heat exchanger through a first pipeline and a second pipeline respectively; an outlet of the condenser is connected with an inlet of the reclaimed water reservoir through a third pipeline; the first outlet of the plate heat exchanger is connected with the inlet of the condenser through a fourth pipeline; the data center refrigerating air-conditioning system also comprises control equipment for controlling the opening or closing of each pipeline and the water chilling unit according to the water temperature in the reclaimed water reservoir. The embodiment of the invention realizes the automatic switching of three operation modes of electric refrigeration in summer, partial natural refrigeration in transitional seasons and complete natural refrigeration in winter.
Description
Technical Field
The invention relates to the technical field of refrigeration air conditioners, in particular to a data center refrigeration air conditioner system.
Background
With the development of 5G and artificial intelligence technologies, people gradually enter an information-based and intelligent society, a data center becomes a new construction project which is popular at present, and the problem of high energy consumption of the data center is more and more prominent, so that the construction of the data center with high energy efficiency has great significance for energy conservation and consumption reduction.
The energy consumption of the data center refrigerating air-conditioning system is only second to that of information equipment, and accounts for about 40% of the total energy consumption of the data center, while the energy consumption and the use cost of the cold source account for 60-70% of the whole data center refrigerating air-conditioning system, so that the cold source is a main factor determining the energy consumption of the data center refrigerating air-conditioning system, and the selection of a proper data center refrigerating air-conditioning system cold source scheme is very important for energy conservation and consumption reduction of the data center.
The data center refrigeration air-conditioning system utilizes a natural cold source to the maximum extent, the common scheme is that a water chilling unit is provided with a cooling tower and a plate heat exchanger, cooling water of the cooling tower in winter and transition seasons directly exchanges cooling water at the tail end of an air conditioner through a plate, and the scheme has two significant defects:
(1) the operation of the cooling tower in summer brings about larger energy consumption;
(2) when the cooling tower supplies cold in winter, the low-temperature environment can cause the cooling water pipe and the cooling tower to be frozen, and if the cooling water pipe and the water receiving disc of the cooling tower are heated and heat preservation is strengthened and other anti-freezing measures are taken, the investment is increased, and the operating cost is also increased.
Disclosure of Invention
Embodiments of the present invention provide a data center refrigerated air conditioning system that overcomes, or at least partially solves, the above-mentioned problems.
In a first aspect, an embodiment of the present invention provides a data center refrigeration air conditioning system, including:
the system comprises a reclaimed water reservoir, a water chilling unit, a plate heat exchanger and an air conditioner tail end, wherein the water chilling unit at least comprises a condenser and an evaporator;
a first water pump is arranged at the downstream of the reclaimed water reservoir, and an outlet of the first water pump is connected with an inlet of the condenser and a first inlet of the plate heat exchanger through a first pipeline and a second pipeline respectively;
an outlet of the condenser is connected with an inlet of the reclaimed water reservoir through a third pipeline; the first outlet of the plate heat exchanger is connected with the inlet of the condenser through a fourth pipeline;
a second water pump is arranged at the downstream of a water return port at the tail end of the air conditioner, and an outlet of the second water pump is connected with an inlet of the evaporator and a second inlet of the plate heat exchanger through a fifth pipeline and a sixth pipeline respectively;
an outlet of the evaporator is connected with a water supply port at the tail end of the air conditioner through a seventh pipeline; a second outlet of the plate heat exchanger is connected with an inlet of the evaporator through an eighth pipeline;
a first inlet of the plate heat exchanger is connected with a first outlet, and a second inlet of the plate heat exchanger is connected with a second outlet; the first outlet of the plate heat exchanger is also communicated with the third pipeline through a ninth pipeline; the second outlet of the plate heat exchanger is also communicated with the seventh pipeline through a tenth pipeline;
the data center refrigerating air-conditioning system also comprises control equipment for controlling the opening or closing of each pipeline and the water chilling unit according to the water temperature in the reclaimed water reservoir.
Further, the control device is specifically configured to:
when the temperature of water in the reclaimed water reservoir is higher than a first preset temperature, starting a water chilling unit, controlling a first pipeline, a third pipeline, a fifth pipeline and a seventh pipeline to be started, and closing a second pipeline, a fourth pipeline, a sixth pipeline, an eighth pipeline, a ninth pipeline and a tenth pipeline;
when the temperature of water in the reclaimed water reservoir is lower than a second preset temperature, closing the water chilling unit, controlling the first pipeline, the fourth pipeline, the fifth pipeline and the eighth pipeline to be closed, and controlling the second pipeline, the third pipeline, the sixth pipeline, the seventh pipeline, the ninth pipeline and the tenth pipeline to be opened;
when the temperature of water in the reclaimed water reservoir is between the first preset temperature and the second preset temperature, starting a water chilling unit, controlling a first pipeline, a fifth pipeline, a ninth pipeline and a tenth pipeline to be closed, and controlling a second pipeline, a third pipeline, a fourth pipeline, a sixth pipeline, a seventh pipeline and an eighth pipeline to be opened;
the first preset temperature is higher than the second preset temperature.
Further, the value range of the first preset temperature is 18-20 ℃; the second preset temperature is in a range of 12-15 ℃.
Further, there is a common first line between the first and fourth conduits; a common second line is present between the fourth and ninth lines, and a common third line is present between the first and ninth lines; the first and second lines constitute the fourth line;
a first electric control valve is arranged on the first pipeline; a second electric control valve is arranged on the second pipeline; a third electric control valve is arranged on a pipeline except the first pipeline and the third pipeline in the first pipeline; a fourth electric control valve is arranged on the pipeline of the ninth pipeline except the second pipeline and the third pipeline; the first to fourth electrically controlled valves are connected with the control device.
Further, there is a common fourth line between the fifth and eighth lines; a common fifth pipeline is arranged between the eighth pipeline and the tenth pipeline, and a common sixth pipeline is arranged between the fifth pipeline and the tenth pipeline; the fourth and fifth pipelines constitute the eighth pipeline;
a fifth electric control valve is arranged on the fourth pipeline; a sixth electric control valve is arranged on the fifth pipeline; a seventh electric control valve is arranged on the pipeline of the fifth pipeline except the fourth pipeline and the fifth pipeline; an eighth electronic control valve is arranged on the pipeline of the tenth pipeline except the fifth pipeline and the sixth pipeline; and the fifth electric control valve to the eighth electric control valve are connected with the control equipment.
Further, the data center refrigeration air conditioning system still includes:
the water supplementing and pressure stabilizing equipment is arranged between the second water pump and a water return port at the tail end of the air conditioner and is used for supplementing water and stabilizing pressure to return water;
and the water softener is used for supplying softened water to the water supplementing constant pressure equipment.
Further, the data center refrigeration air conditioning system still includes: a water inlet of the differential pressure bypass valve is positioned between a water inlet and a water return port of the water supplementing constant pressure equipment, and a water outlet of the differential pressure bypass valve is positioned between a water outlet of the water supplementing constant pressure equipment and an inlet of the second water pump;
the control device is further configured to: and controlling the working frequency of the second water pump and the opening of the differential pressure bypass valve according to the worst pipeline differential pressure at the tail end of the air conditioner, and keeping the differential pressure of the water supply and return constant.
Further, the control of the working frequency of the second water pump and the opening of the differential pressure bypass valve to maintain the constant supply and return water differential pressure specifically comprises:
when the actual pressure difference of the worst loop is lower than a set value, the operating frequency of the second water pump is increased to enable the pressure difference at the tail end to reach the set value;
when the actual pressure difference of the worst loop is higher than a set value, reducing the operating frequency of the second water pump to enable the pressure difference at the tail end to reach the set value;
and when the operating frequency of the second water pump is adjusted to ensure that the tail end pressure difference cannot reach a set value, adjusting the valve opening of the pressure difference bypass valve.
Further, the control device is also used for adjusting the working frequency of the first water pump according to the section of the water temperature in the reclaimed water reservoir;
the first interval, the second interval and the third interval are respectively higher than a first preset temperature, lower than a second preset temperature and between the first preset temperature and the second preset temperature.
Further, a filter screen is arranged at the upstream of the first water pump.
The data center refrigeration air-conditioning system provided by the embodiment of the invention has the following advantages:
the water quality of the reclaimed water is good, the refrigeration system can adopt an open system, namely the reclaimed water can directly enter the water chilling unit to exchange heat with the refrigeration working medium, and the refrigeration efficiency and the utilization rate of reclaimed water cooling capacity of the water chilling unit can be greatly improved.
Secondly, the temperature of the reclaimed water is appropriate and stable, the reclaimed water has small variation range along with seasons, is warm in winter and cool in summer, is stable at 12-15 ℃ in winter, and has the temperature of more than 10 ℃ in severe cold areas, so that the problem of freezing of the cooling tower can be effectively avoided, and the investment and the operating cost of anti-freezing measures are saved. The temperature of the reclaimed water is stabilized at about 20 ℃ in summer, and the reclaimed water is used as natural cooling water of a condenser of the water-cooling water chilling unit, so that the condensing temperature is greatly reduced, the refrigeration efficiency of the water chilling unit is improved, and the energy-saving effect is enhanced.
Compared with the primary sewage, the device reduces the devices such as an automatic screening device, and the material of the heat exchanger can be copper commonly used by a heating ventilation air-conditioning heat exchanger, so that the device cost is greatly reduced.
In addition, three pipelines at the downstream of the first water pump can realize three heat exchange modes of connecting reclaimed water into the condenser, connecting the reclaimed water into the plate heat exchanger firstly, then entering the condenser and connecting the reclaimed water into the plate heat exchanger, wherein the three heat exchange modes are controlled by the control equipment based on the water temperature in the reclaimed water reservoir, and the automatic conversion of three operation modes of electric refrigeration in summer, partial natural refrigeration in transition season and complete natural refrigeration in winter is realized. The total running time of partial natural refrigeration and winter complete natural refrigeration in transitional seasons can exceed three-fourths of the total annual running time of a data center refrigeration air-conditioning system, so that the PUE value of the data center is reduced to below 1.3, the system has great advantages in the aspects of environmental protection, energy conservation, water conservation and the like, has considerable environmental benefits and economic benefits, and has great popularization and application potentials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a data center refrigeration and air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a reclaimed water reservoir side configuration for a data center refrigerated air conditioning system according to another embodiment of the present invention;
FIG. 3 is a schematic configuration diagram of an air conditioning end side of a data center refrigerated air conditioning system according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a data center cooling and air conditioning system according to another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In recent years, the construction and management of reclaimed water facilities in many large and medium-sized cities in China have achieved certain achievement, and according to statistics, the annual sewage discharge amount in China reaches 464 multiplied by 108m3And a, the reclaimed water consumption is considerable, and the urban sewage (including water after secondary treatment and further deepening treatment in a sewage treatment plant and water after treatment in a large building, bath water of a living community, vegetable washing water and the like) after advanced treatment in a treatment facility is collectively called reclaimed water. The water quality is between that of tap water (water supply) and untreated primary sewage (water discharge), so the water is named as 'reclaimed water', and the reclaimed water has better water quality and is mostly used for rivers, greening, landscapes, toilet flushing and the like. The temperature of the reclaimed water is appropriate and stable, the range of variation along with seasons is small, and the reclaimed water is warm in winter and cool in summerThe cold source is stable at 12-15 ℃ in winter, is more than 10 ℃ in severe cold regions, is stable at about 20 ℃ in summer, is an ideal cold source of a data center refrigeration air-conditioning system, and provides advantages for utilizing reclaimed water as a year-round cold source of the data center refrigeration air-conditioning system.
In order to solve the above problems in the prior art, the inventive concept of the embodiment of the present invention is: the system has the advantages that the reclaimed water is used as a cold source, the utilization of low-grade energy of the reclaimed water is realized, meanwhile, the control equipment is arranged to control pipelines and water chilling units in the data center refrigeration air conditioning system, the system is simple and efficient in structure, and the requirements of energy conservation, water conservation and reliable environmental control are met.
Fig. 1 is a schematic structural diagram of a data center cooling and air conditioning system according to an embodiment of the present invention, as shown in fig. 1, including: the system comprises a reclaimed water reservoir 101, a water chilling unit 102, a plate heat exchanger 103, an air conditioning terminal (not shown in the figure, the air conditioning terminal is a separate device and represents an air conditioner in a data center server room at the terminal, such as a chilled water precision air conditioner, a chilled water back panel air conditioner, an inter-row air conditioner and the like) and a control device (not shown in the figure), wherein the water chilling unit 102 at least comprises a condenser 1021 and an evaporator 1022; it will be appreciated that the chiller may also include conventional units such as a compressor, a filter drier, an expansion valve, etc.
A first water pump 106 is arranged at the downstream of the reclaimed water reservoir 101, and the outlet of the first water pump 106 is respectively connected with the inlet of the condenser 1021 and the first inlet 1031 of the plate heat exchanger 103 through a first pipeline 201 and a second pipeline 202;
an outlet of the condenser 1021 is connected with an inlet of the reclaimed water reservoir 101 through a third pipeline 203; a first outlet 1032 of the plate heat exchanger 103 is connected to an inlet of a condenser 1021 via a fourth conduit 204;
a second water pump 107 is arranged at the downstream of the water return port 104 at the tail end of the air conditioner, and the outlet of the second water pump 107 is respectively connected with the inlet of the evaporator 1022 and the second inlet 1033 of the plate heat exchanger 103 through a fifth pipeline 205 and a sixth pipeline 206;
an outlet of the evaporator 1022 is connected to the water supply port 105 of the air conditioner terminal through a seventh pipe 207; the second outlet 1034 of the plate heat exchanger 103 is connected to the inlet of the evaporator 1022 via an eighth conduit 208;
the first inlet 1031 of the plate heat exchanger 103 is connected to the first outlet 1032, and the second inlet 1033 is connected to the second outlet 1034; the first outlet 1032 of the plate heat exchanger 103 is also in communication with the third conduit 203 via the ninth conduit 209; the second outlet 1034 of the plate heat exchanger 103 also communicates with a seventh conduit 207 via a tenth conduit 210.
The embodiment of the invention takes the reclaimed water as the cold water source, and compared with other water sources (river water, seawater, sewage and the like), the system also has the following characteristics:
the water quality of the reclaimed water is good, the refrigeration system can adopt an open system, namely the reclaimed water can directly enter the water chilling unit to exchange heat with the refrigeration working medium, and the refrigeration efficiency and the utilization rate of reclaimed water cooling capacity of the water chilling unit can be greatly improved.
Secondly, the temperature of the reclaimed water is appropriate and stable, the reclaimed water has small variation range along with seasons, is warm in winter and cool in summer, is stable at 12-15 ℃ in winter, and has the temperature of more than 10 ℃ in severe cold areas, so that the problem of freezing of the cooling tower can be effectively avoided, and the investment and the operating cost of anti-freezing measures are saved. The temperature of the reclaimed water is stabilized at about 20 ℃ in summer, and the reclaimed water is used as natural cooling water of a condenser of the water-cooling water chilling unit, so that the condensing temperature is greatly reduced, the refrigeration efficiency of the water chilling unit is improved, and the energy-saving effect is enhanced.
Compared with the primary sewage, the device reduces the devices such as an automatic screening device, and the material of the heat exchanger can be copper commonly used by a heating ventilation air-conditioning heat exchanger, so that the device cost is greatly reduced.
In addition, three pipelines at the downstream of the first water pump can realize three heat exchange modes of connecting reclaimed water into the condenser, connecting the reclaimed water into the plate heat exchanger firstly, then entering the condenser and connecting the reclaimed water into the plate heat exchanger, wherein the three heat exchange modes are controlled by the control equipment based on the water temperature in the reclaimed water reservoir, and the automatic conversion of three operation modes of electric refrigeration in summer, partial natural refrigeration in transition season and complete natural refrigeration in winter is realized.
On the basis of the foregoing embodiments, as an optional embodiment, the control device is specifically configured to:
and when the water temperature in the reclaimed water reservoir is higher than a first preset temperature (a first interval), starting the water chilling unit, controlling the first pipeline, the third pipeline, the fifth pipeline and the seventh pipeline to be opened, and controlling the second pipeline, the fourth pipeline, the sixth pipeline, the eighth pipeline, the ninth pipeline and the tenth pipeline to be closed.
Taking fig. 1 as an example, when the temperature of the water in the reclaimed water reservoir 101 is higher than a first preset temperature, according to the control result of the control device, the reclaimed water from the first water pump 106 enters a condenser 1021 of the water chilling unit through a pipeline 201 to cool the refrigerant, and the reclaimed water after absorbing heat flows back to the upstream end of the water intake of the reclaimed water reservoir through a third pipeline 203; the return water at the air conditioner end of the data center enters the evaporator 1022 of the water chilling unit through the fifth pipeline through the second water pump 107 to release heat, and the refrigerated water after refrigeration is supplied to the air conditioner end through the seventh pipeline 207.
And when the water temperature in the reclaimed water reservoir is lower than a second preset temperature (a second interval), the first preset temperature is higher than the second preset temperature, the water chilling unit is closed, the first pipeline, the fourth pipeline, the fifth pipeline and the eighth pipeline are controlled to be closed, and the second pipeline, the third pipeline, the sixth pipeline, the seventh pipeline, the ninth pipeline and the tenth pipeline are opened.
Taking fig. 1 as an example, when the temperature of the water in the reclaimed water reservoir 101 is lower than a second preset temperature, according to the control result of the control device, the water chilling unit 102 is turned off, reclaimed water from the first water pump 106 enters the plate heat exchanger through the second pipeline 202 to cool the returned water at the tail end of the air conditioner, and then returns to the upstream end of the reclaimed water reservoir water intake through the ninth pipeline 209 and the third pipeline 203; the return water at the air conditioner end of the data center passes through the second water pump 107, enters the plate heat exchanger through the sixth pipeline, is cooled by the reclaimed water, and then is supplied to the air conditioner end through the tenth pipeline 210 and the seventh pipeline 207.
When the temperature of water in the reclaimed water reservoir is between the first preset temperature and the second preset temperature (a third interval), the first preset temperature is higher than the second preset temperature, a water chilling unit is started, the first pipeline, the fifth pipeline, the ninth pipeline and the tenth pipeline are controlled to be closed, and the second pipeline, the third pipeline, the fourth pipeline, the sixth pipeline, the seventh pipeline and the eighth pipeline are started;
taking fig. 1 as an example, when the temperature of the water in the reclaimed water reservoir 101 is between the first preset temperature and the second preset temperature, according to the control result of the control device, the water chilling unit 102 is turned on, reclaimed water from the first water pump 106 enters the end of the plate heat exchanger precooling air conditioner through the second pipeline 202, then enters the condenser through the fourth pipeline 204, cools the refrigerant, absorbs heat, and then returns to the upstream end of the water intake of the reclaimed water reservoir through the third pipeline 203; the return water at the end of the air conditioner enters the plate heat exchanger through the sixth pipeline through the second water pump 107 for preheating, then enters the evaporator 1022 through the eighth pipeline 208 for releasing heat, and then is supplied to the end of the air conditioner through the seventh pipeline 207.
On the basis of the above embodiments, as an optional embodiment, the value range of the first preset temperature is 18 to 20 ℃; the second preset temperature is in a range of 12-15 ℃. For example, the first preset temperature is 19.5 degrees celsius. The second preset temperature is 13.5 degrees celsius.
On the basis of the above embodiments, as an alternative embodiment, a common first pipeline exists between the first pipeline and the fourth pipeline; a common second line is present between the fourth and ninth lines, and a common third line is present between the first and ninth lines; the first line and the second line constitute the fourth line.
It should be noted that, in the embodiments of the present invention, the cost can be further saved by sharing the line closing mode.
A first electric control valve is arranged on the first pipeline; a second electric control valve is arranged on the second pipeline; a third electric control valve is arranged on a pipeline except the first pipeline and the third pipeline in the first pipeline; a fourth electric control valve is arranged on the pipeline of the ninth pipeline except the second pipeline and the third pipeline; the first to fourth electrically controlled valves are connected with the control device.
Fig. 2 is a schematic diagram of a reclaimed water reservoir side structure of a data center refrigeration and air conditioning system according to another embodiment of the invention, and as shown in fig. 2, lines a, c, g and f jointly form a first line, lines a and b jointly form a second line, line h jointly forms a third line, lines d and f jointly form a fourth line, and lines d, g and e jointly form a ninth line, so that a shared first line, namely line f, exists between the first line and the fourth line, a shared second line, namely line d, exists between the fourth line and the ninth line, and a shared third line, namely line g, exists between the first line and the ninth line. A first electric control valve 301 is arranged on the first pipeline f, a second electric control valve 302 is arranged on the second pipeline d, a third electric control valve 303 is arranged on the pipeline except the first pipeline f and the third pipeline g, namely the pipeline c, in the first pipeline, and a fourth electric control valve 304 is arranged on the pipeline except the second pipeline d and the third pipeline g, namely the pipeline e.
The first electric control valve to the fourth electric control valve are connected with the control device, for example, when the temperature of the water in the reclaimed water reservoir is higher than a first preset temperature, the control device starts the water chilling unit, controls the first electric control valve and the third electric control valve to be opened, so that reclaimed water of the first water pump can sequentially pass through the pipelines a, c, g and f to reach the condenser, and then flows back to the upstream end of the water intake of the reclaimed water reservoir through the pipeline h.
On the basis of the above embodiments, as an alternative embodiment, a common fourth pipeline is present between the fifth pipeline and the eighth pipeline; a common fifth pipeline is arranged between the eighth pipeline and the tenth pipeline, and a common sixth pipeline is arranged between the fifth pipeline and the tenth pipeline; the fourth and fifth pipelines constitute the eighth pipeline;
a fifth electric control valve is arranged on the fourth pipeline; a sixth electric control valve is arranged on the fifth pipeline; a seventh electric control valve is arranged on the pipeline of the fifth pipeline except the fourth pipeline and the fifth pipeline; an eighth electronic control valve is arranged on the pipeline of the tenth pipeline except the fifth pipeline and the sixth pipeline; and the fifth electric control valve to the eighth electric control valve are connected with the control equipment.
Fig. 3 is a schematic structural diagram of an air conditioning end side of a data center cooling and air conditioning system according to another embodiment of the present invention, and as shown in fig. 3, lines i, k, o, and n together form a fifth pipeline, lines i and j form a sixth pipeline, line p forms a seventh pipeline, lines l and n form an eighth pipeline, and lines l, o, and m form a tenth pipeline. A fifth electric control valve 305 is arranged on the fourth pipeline n, a sixth electric control valve 306 is arranged on the fifth pipeline l, a seventh electric control valve 307 is arranged on the pipeline of the fifth pipeline except the fourth pipeline n and the sixth pipeline o, namely the pipeline k, and an eighth electric control valve 308 is arranged on the pipeline of the tenth pipeline except the fifth pipeline l and the sixth pipeline o, namely the pipeline m.
The fifth electric control valve to the eighth electric control valve are also connected with the control device, for example, when the temperature of the water in the reclaimed water reservoir is higher than the first preset temperature, the control device starts the water chilling unit, and controls the fifth electric control valve and the seventh electric control valve to be opened, so that the return water at the tail end of the air conditioner can sequentially pass through the pipelines i, k, o and n to reach the evaporator, and then is supplied to the tail end of the air conditioner through the pipeline p.
Fig. 4 is a schematic structural diagram of a data center refrigeration and air conditioning system according to another embodiment of the present invention, in which a reclaimed water reservoir 101, a chiller 102, a plate heat exchanger 103, and a control device (not shown in the figure), the chiller 102 includes at least a condenser 1021 and an evaporator 1022; it will be appreciated that the chiller may also include conventional units such as a compressor, a filter drier, an expansion valve, etc.
Lines a, c, g and f together form a first line, lines a and b form a second line, line h forms a third line, lines d and f form a fourth line, lines d, g and e form a ninth line, lines i, k, o and n together form a fifth line, lines i and j form a sixth line, line p forms a seventh line, lines l and n form an eighth line, and lines l, o and m form a tenth line.
A first water pump 106 is arranged at the downstream of the reclaimed water reservoir 101, and an outlet of the first water pump 106 is connected with an inlet of the condenser 1021 and a first inlet 1031 of the plate heat exchanger 103 through a first pipeline and a second pipeline;
an outlet of the condenser 1021 is connected with an inlet of the reclaimed water reservoir 101 through a third pipeline; a first outlet 1032 of the plate heat exchanger 103 is connected to an inlet of the condenser 1021 via a fourth pipeline;
a second water pump 107 is arranged at the downstream of the water return port 104 at the tail end of the air conditioner, and an outlet of the second water pump 107 is respectively connected with an inlet of the evaporator 1022 and a second inlet 1033 of the plate heat exchanger 103 through a fifth pipeline and a sixth pipeline;
an outlet of the evaporator 1022 is connected to the water supply port 105 at the air conditioner terminal through a seventh pipe; the second outlet 1034 of the plate heat exchanger 103 is connected to the inlet of the evaporator 1022 via an eighth line;
the first inlet 1031 of the plate heat exchanger 103 is connected to the first outlet 1032, and the second inlet 1033 is connected to the second outlet 1034; the first outlet 1032 of the plate heat exchanger 103 is also communicated with a third pipeline through a ninth pipeline; the second outlet 1034 of the plate heat exchanger 103 is also in communication with a seventh conduit via a tenth conduit.
On the basis of the above embodiments, as an alternative embodiment, the data center cooling and air conditioning system further includes: the water supplementing and pressure stabilizing equipment is arranged between the second water pump and a water return port at the tail end of the air conditioner and is used for supplementing water and stabilizing pressure to return water; and the water softener is used for supplying softened water to the water supplementing constant pressure equipment.
On the basis of the above embodiments, as an alternative embodiment, the data center cooling and air conditioning system further includes:
a water inlet of the differential pressure bypass valve is positioned between a water inlet and a water return port of the water supplementing constant pressure equipment, and a water outlet of the differential pressure bypass valve is positioned between a water outlet of the water supplementing constant pressure equipment and an inlet of the second water pump;
the control device is further configured to: and controlling the working frequency of the second water pump and the opening of the differential pressure bypass valve according to the worst pipeline differential pressure at the tail end of the air conditioner, and keeping the differential pressure of the water supply and return constant. Specifically, the method comprises the following steps:
when the actual pressure difference of the worst loop is lower than a set value, the operating frequency of the second water pump is increased to enable the pressure difference at the tail end to reach the set value;
when the actual pressure difference of the worst loop is higher than a set value, reducing the operating frequency of the second water pump to enable the pressure difference at the tail end to reach the set value;
and when the operating frequency of the second water pump is adjusted to ensure that the tail end pressure difference cannot reach a set value, adjusting the valve opening of the pressure difference bypass valve.
When the load at the tail end of the air conditioner is increased, the actual pressure difference of the worst loop becomes smaller, and the pressure difference at the tail end reaches a set value by increasing the operating frequency of the second water pump. When the end load is reduced, the actual pressure difference of the worst loop becomes larger, the operating frequency of the second water pump is reduced to enable the end pressure difference to reach a set value, when the second water pump cannot meet the requirement (the minimum frequency of the water pump is set at 30HZ), the pressure difference bypass valve is opened, and the opening degree of the valve is controlled by the pressure difference of the worst loop.
On the basis of the above embodiments, as an optional embodiment, the control device is further configured to control the operating frequency of the first water pump to adjust the flow deviation caused by different pressure losses when the temperature of the water in the reclaimed water reservoir is in three intervals, so that the reclaimed water flow rate is kept as consistent as possible. It can be understood that, in the embodiment of the present invention, the temperature of the water in the reclaimed water reservoir is higher than a first preset temperature, that is, a first interval; the water temperature in the reclaimed water reservoir is lower than a second preset temperature, namely a second interval; and the temperature of the water in the reclaimed water reservoir is between the first preset temperature and the second preset temperature, namely a third interval. The working frequency of the first water pump meets the following requirements: operating frequency when the temperature of water in the mid-water reservoir is in the third interval > operating frequency when the temperature of water in the mid-water reservoir is in the first interval > operating frequency when the temperature of water in the mid-water reservoir is in the second interval. It should be noted that, in the third interval, since the plate heat exchanger and the water chilling unit are connected in series, the resistance is the largest at this time, and the frequency of the pump should be the largest.
On the basis of the above embodiments, as an alternative embodiment, a filter screen is arranged upstream of the first water pump, so that the impurities of the reclaimed water entering the first water pump are less.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A data center refrigerated air conditioning system, comprising: the system comprises a reclaimed water reservoir, a water chilling unit, a plate heat exchanger and an air conditioner tail end, wherein the water chilling unit at least comprises a condenser and an evaporator;
a first water pump is arranged at the downstream of the reclaimed water reservoir, and an outlet of the first water pump is connected with an inlet of the condenser and a first inlet of the plate heat exchanger through a first pipeline and a second pipeline respectively;
an outlet of the condenser is connected with an inlet of the reclaimed water reservoir through a third pipeline; the first outlet of the plate heat exchanger is connected with the inlet of the condenser through a fourth pipeline;
a second water pump is arranged at the downstream of a water return port at the tail end of the air conditioner, and an outlet of the second water pump is connected with an inlet of the evaporator and a second inlet of the plate heat exchanger through a fifth pipeline and a sixth pipeline respectively;
an outlet of the evaporator is connected with a water supply port at the tail end of the air conditioner through a seventh pipeline; a second outlet of the plate heat exchanger is connected with an inlet of the evaporator through an eighth pipeline;
a first inlet of the plate heat exchanger is connected with a first outlet, and a second inlet of the plate heat exchanger is connected with a second outlet; the first outlet of the plate heat exchanger is also communicated with the third pipeline through a ninth pipeline; the second outlet of the plate heat exchanger is also communicated with the seventh pipeline through a tenth pipeline;
the data center refrigerating air-conditioning system also comprises control equipment for controlling the opening or closing of each pipeline and the water chilling unit according to the water temperature in the reclaimed water reservoir.
2. The data center refrigerated air conditioning system of claim 1, wherein the control device is specifically configured to:
when the temperature of water in the reclaimed water reservoir is higher than a first preset temperature, starting a water chilling unit, controlling a first pipeline, a third pipeline, a fifth pipeline and a seventh pipeline to be started, and closing a second pipeline, a fourth pipeline, a sixth pipeline, an eighth pipeline, a ninth pipeline and a tenth pipeline;
when the temperature of water in the reclaimed water reservoir is lower than a second preset temperature, closing the water chilling unit, controlling the first pipeline, the fourth pipeline, the fifth pipeline and the eighth pipeline to be closed, and controlling the second pipeline, the third pipeline, the sixth pipeline, the seventh pipeline, the ninth pipeline and the tenth pipeline to be opened;
when the temperature of water in the reclaimed water reservoir is between the first preset temperature and the second preset temperature, starting a water chilling unit, controlling a first pipeline, a fifth pipeline, a ninth pipeline and a tenth pipeline to be closed, and controlling a second pipeline, a third pipeline, a fourth pipeline, a sixth pipeline, a seventh pipeline and an eighth pipeline to be opened;
the first preset temperature is higher than the second preset temperature.
3. The data center refrigerated air conditioning system of claim 2 wherein the first predetermined temperature is between 18 and 20 degrees celsius; the second preset temperature is in a range of 12-15 ℃.
4. The data center refrigerated air conditioning system of claim 1 or 2 wherein there is a first line in common between the first and fourth lines; a common second line is present between the fourth and ninth lines, and a common third line is present between the first and ninth lines; the first and second lines constitute the fourth line;
a first electric control valve is arranged on the first pipeline; a second electric control valve is arranged on the second pipeline; a third electric control valve is arranged on a pipeline except the first pipeline and the third pipeline in the first pipeline; a fourth electric control valve is arranged on the pipeline of the ninth pipeline except the second pipeline and the third pipeline; the first to fourth electrically controlled valves are connected with the control device.
5. The data center refrigerated air conditioning system of claim 1 wherein a common fourth line exists between the fifth and eighth lines; a common fifth pipeline is arranged between the eighth pipeline and the tenth pipeline, and a common sixth pipeline is arranged between the fifth pipeline and the tenth pipeline; the fourth and fifth pipelines constitute the eighth pipeline;
a fifth electric control valve is arranged on the fourth pipeline; a sixth electric control valve is arranged on the fifth pipeline; a seventh electric control valve is arranged on the pipeline of the fifth pipeline except the fourth pipeline and the fifth pipeline; an eighth electronic control valve is arranged on the pipeline of the tenth pipeline except the fifth pipeline and the sixth pipeline; and the fifth electric control valve to the eighth electric control valve are connected with the control equipment.
6. The data center refrigerated air conditioning system of claim 1 further comprising:
the water supplementing and pressure stabilizing equipment is arranged between the second water pump and a water return port at the tail end of the air conditioner and is used for supplementing water and stabilizing pressure to return water;
and the water softener is used for supplying softened water to the water supplementing constant pressure equipment.
7. The data center refrigerated air conditioning system of claim 6 further comprising: a water inlet of the differential pressure bypass valve is positioned between a water inlet and a water return port of the water supplementing constant pressure equipment, and a water outlet of the differential pressure bypass valve is positioned between a water outlet of the water supplementing constant pressure equipment and an inlet of the second water pump;
the control device is further configured to: and controlling the working frequency of the second water pump and the opening of the differential pressure bypass valve according to the worst pipeline differential pressure at the tail end of the air conditioner, and keeping the differential pressure of the water supply and return constant.
8. The data center refrigeration air-conditioning system according to claim 7, wherein the operating frequency of the second water pump and the opening degree of the differential pressure bypass valve are controlled to maintain the pressure difference between the supply water and the return water constant, and specifically:
when the actual pressure difference of the worst loop is lower than a set value, the operating frequency of the second water pump is increased to enable the pressure difference at the tail end to reach the set value;
when the actual pressure difference of the worst loop is higher than a set value, reducing the operating frequency of the second water pump to enable the pressure difference at the tail end to reach the set value;
and when the operating frequency of the second water pump is adjusted to ensure that the tail end pressure difference cannot reach a set value, adjusting the valve opening of the pressure difference bypass valve.
9. The data center refrigerated air conditioning system of claim 2 wherein the control device is further configured to adjust the operating frequency of the first water pump based on an interval in which the temperature of the water in the reclaimed water reservoir is within;
the first interval, the second interval and the third interval are respectively higher than a first preset temperature, lower than a second preset temperature and between the first preset temperature and the second preset temperature.
10. The data center refrigerated air conditioning system of claim 1 wherein a filter screen is disposed upstream of the first water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010398784.3A CN113654129A (en) | 2020-05-12 | 2020-05-12 | Data center refrigeration air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010398784.3A CN113654129A (en) | 2020-05-12 | 2020-05-12 | Data center refrigeration air-conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113654129A true CN113654129A (en) | 2021-11-16 |
Family
ID=78488791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010398784.3A Pending CN113654129A (en) | 2020-05-12 | 2020-05-12 | Data center refrigeration air-conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113654129A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1949003A1 (en) * | 2005-11-11 | 2008-07-30 | D'Angelosante, Dino | Module of use of leading heat conductor fluid for the power supplying of combined utilities |
| CN201386030Y (en) * | 2009-04-17 | 2010-01-20 | 巢民强 | City regenerated water utilizing system |
| CN103335359A (en) * | 2013-07-09 | 2013-10-02 | 浙江大学昆山创新中心 | Intelligent heat exchange station |
| CN203231460U (en) * | 2013-04-25 | 2013-10-09 | 朱正杆 | Central air-conditioning water circulating system |
| CN105135577A (en) * | 2015-09-25 | 2015-12-09 | 大连国霖技术有限公司 | Cooling system combining natural cooling units and air-cooled water chilling units |
| CN107166586A (en) * | 2017-05-26 | 2017-09-15 | 郑州云海信息技术有限公司 | A kind of data center's energy-saving air conditioning system and adjusting method |
-
2020
- 2020-05-12 CN CN202010398784.3A patent/CN113654129A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1949003A1 (en) * | 2005-11-11 | 2008-07-30 | D'Angelosante, Dino | Module of use of leading heat conductor fluid for the power supplying of combined utilities |
| CN201386030Y (en) * | 2009-04-17 | 2010-01-20 | 巢民强 | City regenerated water utilizing system |
| CN203231460U (en) * | 2013-04-25 | 2013-10-09 | 朱正杆 | Central air-conditioning water circulating system |
| CN103335359A (en) * | 2013-07-09 | 2013-10-02 | 浙江大学昆山创新中心 | Intelligent heat exchange station |
| CN105135577A (en) * | 2015-09-25 | 2015-12-09 | 大连国霖技术有限公司 | Cooling system combining natural cooling units and air-cooled water chilling units |
| CN107166586A (en) * | 2017-05-26 | 2017-09-15 | 郑州云海信息技术有限公司 | A kind of data center's energy-saving air conditioning system and adjusting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202328574U (en) | Air supply system of central air conditioner with two cooling coils | |
| CN104279667B (en) | A kind of phase change energy storage air conditioning system | |
| WO2020037843A1 (en) | Air conditioner cooling water system for multi-stage cooling and cascade utilization of terminal energy | |
| CN202002246U (en) | Natural cooling cold water unit | |
| CN102278795B (en) | Central air-conditioning air supply system adopting double cooling coils | |
| CN101520219A (en) | All-year cold supply chiller with natural cooling function | |
| CN105135577A (en) | Cooling system combining natural cooling units and air-cooled water chilling units | |
| CN106765783B (en) | Energy-saving high-precision wine cellar air conditioning system combining water cold accumulation and natural cold source | |
| CN107062472A (en) | Double cold source refrigerating systems that natural cooling unit is combined with centrifugal water chillers | |
| CN207865610U (en) | A kind of middle temperature air conditioning system based on regional cold supply system | |
| CN202002247U (en) | Natural cooling type air conditioning unit | |
| CN202158621U (en) | High-heat flux energy-saving refrigeration system | |
| CN214172416U (en) | Intelligent air conditioner water return system | |
| CN217900220U (en) | Evaporation condensation heat pump unit with hydraulic module | |
| CN208425085U (en) | Data center computer room whole year with antifreezing water tank runs air-conditioning cooling device | |
| CN215529686U (en) | Cold water type cold station system | |
| CN113654129A (en) | Data center refrigeration air-conditioning system | |
| CN115289714A (en) | Evaporation condensation heat pump unit with hydraulic module and control method thereof | |
| CN208794579U (en) | A kind of Summer and winter switching energy-saving freezing water system | |
| CN112254236B (en) | Indirect evaporative cooling cold water system combining mechanical refrigeration and switching method | |
| CN212930316U (en) | Modular integrated water chilling unit | |
| CN204115130U (en) | A kind of phase change energy storage air conditioning system | |
| CN205783465U (en) | A kind of cooling unit and be provided with the cooling by wind of this cooling unit | |
| CN209605440U (en) | A kind of ice making air source heat pump | |
| CN201259287Y (en) | Cold storage air conditioner system for enhancing cold-storage density |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211116 |