CN212457134U - Energy-saving machine room air conditioning system - Google Patents
Energy-saving machine room air conditioning system Download PDFInfo
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- CN212457134U CN212457134U CN202021055162.2U CN202021055162U CN212457134U CN 212457134 U CN212457134 U CN 212457134U CN 202021055162 U CN202021055162 U CN 202021055162U CN 212457134 U CN212457134 U CN 212457134U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 22
- 239000003507 refrigerant Substances 0.000 claims abstract description 52
- 238000005057 refrigeration Methods 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to an energy-saving machine room air conditioning system which comprises an indoor unit, an outdoor unit and a control unit, wherein the indoor unit comprises a heat pipe evaporator, an indoor fan and a mechanical refrigerating device, the heat pipe evaporator is provided with a gaseous refrigerant outlet and a liquid refrigerant inlet, and the mechanical refrigerating device comprises an evaporator, a condenser, a compressor and a throttling device; the outdoor unit comprises a heat pipe condenser and an outdoor fan, the indoor unit is communicated with the outdoor unit through a refrigerant pipeline in a fluid mode, the outdoor unit is higher than the indoor unit, the heat pipe condenser is arranged on the outer side of the mechanical refrigerating device condenser, the left side of the mechanical refrigerating device condenser is also provided with an evaporator of a heat pipe heat exchange system, and the control unit automatically controls the natural cold source and the mechanical cold source to be in an independent operation mode and a combined operation mode. The invention perfectly combines the heat pipe technology and the compressor refrigeration technology, effectively utilizes the natural cold source to achieve the aim of energy saving, and reduces the PUE value of the data machine room.
Description
Technical Field
The present invention relates to a machine room air conditioning system, and more particularly, to an energy-saving machine room air conditioning system.
Background
With the continuous expansion of data centers, green energy-saving data centers have been developed to be practical by concepts. More and more data centers are constructed by taking the PUE value as a key index, and the construction of green data centers is a consensus in the industry in pursuit of lower PUE values. For example, the PUE value of microsoft corporation in the data center of dublin is 1.25. Recently, the PUE value of the existing data center of Google corporation was reduced to 1.11. The average PUE of the data center in China is 1.8-2.0, and according to survey statistics of the data center in China, for a data center without significant energy-saving measures, a machine room with the area of 1000 square meters is used, and the electricity consumption per year is about 500 kWh more than ten thousand. Therefore, the necessity of energy saving is very important for the newly built large data center.
The energy consumption problem of the data center relates to a plurality of aspects, and the main factor is of course an air-conditioning and refrigerating system, and is shown according to the statistical report of the technical committee 9.9 (TC 9.9 for short) of the american society of heating and refrigeration engineers (ASHRAE): the energy consumption distribution of the data center is as follows: the electricity consumption of the server accounts for 41%, the electricity consumption of the air conditioner accounts for 31%, the electricity consumption of the UPS accounts for 8%, the electricity consumption of the lighting accounts for 4%, and the electricity consumption of other parts accounts for 11%.
Therefore, the data center air conditioning refrigeration system accounts for 31% of the total power consumption of the data center, and is a key factor influencing the energy consumption of the machine room. The energy consumption of air-conditioning refrigeration of each data center is greatly different, the good air-conditioning refrigeration scheme can greatly reduce the energy consumption, the energy-saving measure usually adopted in the industry at present is that after a 'free cooling' technology is added into a chilled water system, partial energy saving can be realized, a natural cold source cannot be utilized to the maximum extent, the system has complex pipelines, large one-time investment and long construction period.
Therefore, an energy-saving machine room air conditioner is urgently needed to replace the existing data center refrigerating system, the PUE of the data machine room is reduced, and the purpose of energy conservation is achieved.
Disclosure of Invention
The invention makes innovation and breakthrough aiming at the technical problems in the existing machine room refrigerating system, provides a brand-new machine room air conditioning system, perfectly combines the heat pipe technology and the compressor refrigerating technology, effectively utilizes a natural cold source to achieve the aim of saving energy, reduces the PUE value of a data machine room, adopts a modular combination mode, can be built in batches, and reduces the one-time investment of an owner.
In order to achieve the purpose, the invention adopts the following technical scheme: an energy-saving machine room air conditioning system comprises an indoor unit, an outdoor unit and a control unit, wherein the indoor unit comprises a heat pipe evaporator, an indoor fan and a mechanical refrigerating device, the heat pipe evaporator is provided with a gaseous refrigerant outlet and a liquid refrigerant inlet, and the mechanical refrigerating device comprises an evaporator, a condenser, a compressor and a throttling device; the outdoor unit comprises a heat pipe condenser and an outdoor fan, the indoor unit is communicated with the outdoor unit through a refrigerant pipeline, and the outdoor unit is higher than the indoor unit and is characterized in that: the heat pipe evaporator is arranged on the outer side of the mechanical refrigerating device evaporator, the left side of the condenser of the mechanical refrigerating device is also the evaporator of the heat pipe heat exchange system, a refrigerant gas outlet of the indoor heat pipe evaporator is connected to a gas inlet fluid of the outdoor unit heat pipe condenser through the left side of the condenser of the mechanical refrigerating device to be communicated, and the control unit automatically controls the natural cold source and the mechanical cold source to be in an independent operation mode and a combined operation mode.
In one embodiment, the energy efficient room air conditioning system further comprises a fan on the evaporator side of the heat pipe and a fan on the evaporator side of the mechanical refrigeration unit.
Preferably, the heat pipe evaporator and the mechanical refrigeration device evaporator are overlapped, the evaporator of the mechanical refrigeration device is arranged on the inner side of the heat pipe evaporator, and the fans are the same fan.
In one embodiment, the mechanical refrigeration device further comprises a plate heat exchanger or a shell and tube heat exchanger, and the right side of the plate heat exchanger or the shell and tube heat exchanger is a condenser of the mechanical refrigeration device.
The first refrigerant inlet of the heat exchanger is in fluid communication with a compressor exhaust port of the mechanical refrigeration device, the first refrigerant outlet is in fluid communication with a refrigerant inlet of a throttling device of the mechanical refrigeration device, the second refrigerant inlet of the heat exchanger is in fluid communication with a gaseous outlet of the heat pipe evaporator, and the second refrigerant outlet of the heat exchanger is in fluid communication with a gaseous inlet of the heat pipe condenser.
In one embodiment, the liquid refrigerant outlet of the heat pipe condenser is in fluid communication with the liquid refrigerant inlet of the heat pipe evaporator via a refrigerant line, and a flow regulator is disposed in the refrigerant line.
In one embodiment, the mechanical refrigeration device further comprises a dry filter in the refrigerant line between the outlet of the condenser and the liquid refrigerant inlet of the throttling device.
In one embodiment, the mechanical refrigeration unit further comprises a gas-liquid separator in the refrigerant line between the inlet of the condenser and the discharge of the compressor.
In one embodiment, a liquid storage device is arranged in a refrigerant pipeline between the heat pipe condenser and the heat pipe evaporator.
In one embodiment, the compressor may be a single fixed frequency compressor or a plurality of fixed frequency compressors connected in parallel, or a single inverter compressor or a plurality of inverter compressors connected in parallel, or a combination of a single inverter compressor and a single fixed frequency compressor.
In one embodiment, the heat pipe condenser is an evaporative cooling system or an air cooling system.
The beneficial technical effects of the invention comprise:
(1) the natural cold source and the mechanical cold source perform secondary refrigeration, the natural cold source is fully utilized, the condensation temperature of the mechanical refrigeration is reduced, and the refrigeration system is more energy-saving.
(2) The natural cold source directly exchanges heat with the circulating refrigerant once, the required heat exchange temperature difference is small, the time for utilizing the natural cold source all year round is more, and the energy is saved.
(3) The natural cold source is utilized for a longer time all the year round, and the energy is saved.
(4) Refrigerant circulation between the indoor unit and the outdoor unit has zero energy consumption and saves more energy.
(5) The indoor heat pipe evaporator is used for latent heat exchange, has small thickness and low wind resistance, reduces the energy consumption of an indoor fan, and is beneficial to energy conservation.
(6) The condenser, the evaporator and the compressor of the mechanical refrigerating device are installed in the same area, and the distance between the system pipelines is reduced, so that the resistance is reduced, the pressure difference between the outlet and the suction port of the compressor is reduced, the energy efficiency ratio is improved, and the energy consumption is reduced.
(7) The running time of the compressor is greatly reduced by utilizing a natural cold source, and the service life of the air conditioning equipment is prolonged.
(8) In the project of constructing a large-scale data center, the traditional machine room air conditioner needs to be constructed integrally at one time, the construction period is long, and the one-time investment is large.
(9) The energy-saving machine room heat pipe air conditioner can fully utilize natural cold sources, can automatically adjust the refrigerating capacity according to the machine room load, and effectively reduces the PUE value of a newly-built machine room under the partial load.
Drawings
Fig. 1 is an invention schematic diagram of an energy-saving machine room heat pipe air conditioning system of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. It should be understood that the embodiments of the present invention described in the drawings are illustrative of the invention and are not to be construed as limiting the invention. The scope of the invention is defined by the appended claims.
It should be noted that for convenience of description, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "upper", "lower", "inner", "outer" and other directional terms may be used merely to facilitate describing the relative orientation of the various components of the invention, and should not be construed as limiting the invention in any way.
Referring to fig. 1, an energy-saving air conditioning system 100 of a machine room according to the present invention includes an indoor unit 20, an outdoor unit 10, and a control unit (not shown), wherein the indoor unit 20 is in fluid communication with the outdoor unit 10 through a refrigerant line 30. The indoor unit 20 includes a heat pipe evaporator assembly and a mechanical refrigeration device; the heat pipe evaporator assembly comprises a heat pipe evaporator 203, a flow regulating device 207 and an indoor fan 201, wherein the heat pipe evaporator 203 is provided with a gaseous refrigerant outlet (not shown) and a liquid refrigerant inlet (not shown); the mechanical refrigeration device comprises a mechanical refrigeration evaporator 202, an indoor fan 201, a compressor 204, a condenser 206' and a throttling device 205. The outdoor unit 10 includes a heat pipe condenser 102 and an outdoor fan 101.
The condenser 206' in the indoor unit 20 of fig. 1 is a part of the plate heat exchanger 206, and the plate heat exchanger 206 includes a first refrigerant inlet 2061, a first refrigerant outlet 2062, a second refrigerant inlet 2064, and a second refrigerant outlet 2063; the first refrigerant inlet 2061 is in fluid communication with the exhaust outlet of the compressor 204, and the first refrigerant outlet 2062 is in fluid communication with a refrigerant inlet (not shown) of the throttling device 205; the second refrigerant inlet 2064 is in fluid communication with a refrigerant outlet (not shown) of the heat pipe evaporator 203, and the second refrigerant outlet 2063 is in fluid communication with a refrigerant inlet (not shown) of the heat pipe condenser 102 in the outdoor unit 10 via the line 30.
When the pure natural cold source working mode, that is, the pure heat pipe system is working (at this time, the mechanical refrigeration system is not working), the refrigerant in the heat pipe evaporator 203 in the indoor unit 20 absorbs the heat of the indoor environment and evaporates into a gaseous refrigerant under the action of the circulating air of the indoor fan 201, and enters the refrigerant inlet of the condenser 102 in the outdoor unit 10 through the left side of the plate heat exchanger 206 and the system pipeline 30, and is condensed into a liquid refrigerant under the condensation action of the outdoor unit, and flows into the indoor heat pipe evaporator 203 through the flow regulating device 207 through the pipeline 30 under the action of gravity, so as to complete one thermal cycle, and the operation is repeated in this way, so that the indoor heat is taken out, one heat exchange between the indoor and the outdoor is completed, and only the indoor fan 201 and the outdoor fan 101 consume electricity, and.
When the heat exchange amount of the pure natural cold source cannot completely meet the indoor refrigeration requirement, the mechanical refrigeration system is started, at this time, the right side of the plate heat exchanger 206 is the mechanically refrigerated condenser 206', the left side is the evaporator 206 of the heat pipe system, and the outdoor unit 10 serves as the condenser of the whole system. After the condensed liquid refrigerant flows through the flow regulating device 207 through the pipeline 30 and then passes through the heat pipe evaporator 203, the condensed liquid refrigerant enters the left side 206 'of the heat exchanger from the second refrigerant inlet 2604 of the plate heat exchanger to evaporate and absorb heat, so as to provide a cold source for the condenser 206' of the mechanical refrigeration device.
The compressor 204 in this embodiment may be a single fixed-frequency compressor or multiple fixed-frequency compressors, or a single inverter compressor or multiple inverter compressors, or a combination of at least one fixed-frequency compressor and at least one inverter compressor.
The condenser 102 in this embodiment may be air-cooled or evaporation-cooled, but is not limited thereto.
The plate heat exchanger 206 in the present embodiment may be a brazed plate heat exchanger, but is not limited thereto.
The indoor fan 201 in this embodiment may be used for both the heat pipe evaporator 203 and the mechanical refrigeration evaporator 202, or may be provided with an indoor fan for each of the heat pipe evaporator 203 and the mechanical refrigeration evaporator 202.
The throttle device 205 in this embodiment may be an electronic expansion valve, but is not limited thereto.
The control unit (not shown) and the control logic in this embodiment are easy to be implemented by those skilled in the art, and are not described herein again.
Based upon the foregoing description of the preferred embodiment of the invention, it should be apparent that the invention defined by the appended claims is not limited solely to the specific details set forth in the foregoing description, as many apparent variations thereof are possible without departing from the spirit or scope thereof.
Claims (7)
1. An energy-saving machine room air conditioning system comprises an indoor unit, an outdoor unit and a control unit, wherein the indoor unit comprises a heat pipe evaporator, an indoor fan and a mechanical refrigerating device, the heat pipe evaporator is provided with a gaseous refrigerant outlet and a liquid refrigerant inlet, and the mechanical refrigerating device comprises an evaporator, a condenser, a compressor and a throttling device; the outdoor unit comprises a heat pipe condenser and an outdoor fan, the indoor unit is communicated with the outdoor unit through a refrigerant pipeline, and the outdoor unit is higher than the indoor unit and is characterized in that: the heat pipe evaporator is arranged on the outer side of the mechanical refrigerating device evaporator, the left side of the condenser of the mechanical refrigerating device is also the evaporator of the heat pipe heat exchange system, a refrigerant gas outlet of the indoor heat pipe evaporator is connected to a gas inlet of the outdoor unit heat pipe condenser through the left side of the condenser of the mechanical refrigerating device, and the control unit automatically controls the natural cold source and the mechanical cold source to be in an independent operation mode and a combined operation mode.
2. The energy-saving machine room air conditioning system of claim 1, further comprising a heat pipe evaporator fan and a mechanical refrigeration unit evaporator fan.
3. An energy efficient air conditioning system for a machine room as claimed in claim 2 wherein the heat pipe evaporator fan and the mechanical refrigeration unit evaporator fan are the same fan.
4. The energy-saving machine room air conditioning system of claim 1, wherein the mechanical refrigerating device further comprises a plate heat exchanger or a shell and tube heat exchanger, and the right side of the plate heat exchanger or the shell and tube heat exchanger is a condenser of the mechanical refrigerating device.
5. The energy efficient computer room air conditioning system of claim 4, wherein the mechanical refrigeration device further comprises a plate heat exchanger, a first refrigerant inlet of the plate heat exchanger is in fluid communication with a compressor discharge of the mechanical refrigeration device, a first refrigerant outlet is in fluid communication with a refrigerant inlet of a throttling device of the mechanical refrigeration device, a second refrigerant inlet of the plate heat exchanger is in fluid communication with the vapor outlet of the heat pipe evaporator, and a second refrigerant outlet of the plate heat exchanger is in fluid communication with the vapor inlet of the heat pipe condenser.
6. The energy-saving machine room air conditioning system of claim 1, wherein the compressor can be a single fixed frequency compressor or a plurality of fixed frequency compressors connected in parallel, or a single variable frequency compressor or a plurality of variable frequency compressors connected in parallel, or a single variable frequency compressor connected in parallel with a plurality of fixed frequency compressors.
7. The air conditioning system of energy-saving machine room of claim 1, wherein the heat pipe condenser of the outdoor unit is in an evaporative cooling mode or an air cooling mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021055162.2U CN212457134U (en) | 2020-06-10 | 2020-06-10 | Energy-saving machine room air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021055162.2U CN212457134U (en) | 2020-06-10 | 2020-06-10 | Energy-saving machine room air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212457134U true CN212457134U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021055162.2U Expired - Fee Related CN212457134U (en) | 2020-06-10 | 2020-06-10 | Energy-saving machine room air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212457134U (en) |
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2020
- 2020-06-10 CN CN202021055162.2U patent/CN212457134U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210202 |