CN111678198A - High-energy-efficiency-ratio machine room air conditioning system - Google Patents
High-energy-efficiency-ratio machine room air conditioning system Download PDFInfo
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- CN111678198A CN111678198A CN202010522733.7A CN202010522733A CN111678198A CN 111678198 A CN111678198 A CN 111678198A CN 202010522733 A CN202010522733 A CN 202010522733A CN 111678198 A CN111678198 A CN 111678198A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 28
- 239000003507 refrigerant Substances 0.000 claims abstract description 97
- 238000005057 refrigeration Methods 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 11
- 210000001503 joint Anatomy 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- 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
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels
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- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- 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
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- 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
- F24F5/001—Compression cycle type
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- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Sustainable Energy (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an air conditioning system of a machine room with high energy efficiency ratio, which comprises an indoor unit, an outdoor unit and a control unit, wherein the indoor unit is in fluid communication with the outdoor unit through a refrigerant pipeline and comprises a heat pipe evaporator, a refrigerant flow regulating device, an indoor fan and a mechanical refrigerating device; the mechanical refrigerating device comprises a compressor, an evaporator, a condenser and a throttling device; the outdoor unit comprises a heat pipe condenser and an outdoor fan; the heat pipe technology is perfectly embedded into the traditional compressor refrigeration system, so that the energy efficiency ratio of the compressor is remarkably improved, the natural cold source is in seamless butt joint with the mechanical cold source, the reliability of the system is improved, the natural cold source is fully utilized, the system has high energy efficiency ratio, and the PUE of a data machine room is reduced.
Description
Technical Field
The invention relates to a machine room air conditioning system, in particular to a high energy efficiency ratio machine room air conditioning system.
Background
To meet the requirements of national planning, data center systems face challenges. The refrigeration system is the field in which data centers are currently easier to achieve greater performance improvements. In order to reduce the running time of mechanical refrigeration and maximize the utilization of a natural cold source (FreeC), attempts are made in the industry from multiple aspects such as air cooling, water cooling, liquid cooling, engineering, operation maintenance, control and the like. The verification proves that the natural fresh air and auxiliary refrigeration technology has requirements on the air quality of an operation place, and the management is complex although the energy efficiency is high; the water chilling unit + plate replacement technology has complex pipelines, large occupied area, complex management and operation maintenance and high construction cost; the direct evaporation technology has requirements on the air quality of an operation place, has high requirements on the adaptation environment of IT equipment, and is complex in management and operation maintenance; the liquid cooling technology has high cost in a short period and complex engineering, and is difficult to be used on a large scale.
Based on the requirements for energy conservation and emission reduction, the novel high-energy-efficiency-ratio machine room air conditioning technology is urgently needed to replace the traditional machine room air conditioner, and compared with other new technologies, the novel high-energy-efficiency-ratio machine room air conditioning technology is easy to realize, can be commercially applied as soon as possible, effectively reduces the PUE of a data machine room, and achieves the purposes of energy conservation and emission reduction.
Disclosure of Invention
The invention tightly grasps the theme of 'energy efficiency ratio', innovatively and breakthrough aiming at the problems of low energy efficiency ratio in the existing machine room air-conditioning technology and the defects of high construction cost, complex management, operation and maintenance and the like of other technologies, provides a brand-new machine room air-conditioning system with high energy efficiency ratio, furthest utilizes a natural cold source, reduces the PUE of a data machine room, is easy for commercial application and builds a green data center.
In order to achieve the purpose, the air conditioning system provided by the invention embeds the separated gravity assisted heat pipe technology into the traditional compressor refrigeration system, and a natural cold source and a mechanical cold source are in seamless butt joint, so that the energy efficiency ratio of the whole machine is obviously improved. The invention specifically adopts the following technical scheme: an air conditioning system of a machine room with high energy efficiency ratio comprises an indoor unit, an outdoor unit and a control unit, and is characterized in that 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 a compressor, a condenser, an evaporator and a throttling device; the outdoor unit comprises a heat pipe condenser and an outdoor fan; the control unit enables a mechanical refrigerating device in the system to stop working and be in a natural cold source working mode when the natural cold source heat pipe heat exchange system completely meets the heat exchange quantity requirement of a machine room; when the natural cold source heat pipe heat exchange system can only provide part of cold quantity requirements for the machine room, the mechanical refrigerating device is started, and the air conditioning system is in a combined working mode of the natural cold source and the mechanical cold source; when the natural cold source can not directly provide cold for the indoor, the air conditioning system is in a mechanical cold source working mode to provide cold for the machine room, and the outdoor condenser of the heat pipe system provides the cold source for the mechanical refrigerating device.
In one embodiment, the energy efficient ratio room air conditioning system further comprises a heat pipe evaporator fan (i.e., an indoor fan) and a mechanical chiller evaporator fan (i.e., an indoor fan).
Preferably, the heat pipe evaporator fan and the mechanical refrigeration device evaporator fan are the same fan.
In one embodiment, the mechanical refrigeration unit further comprises a heat exchanger, the condenser of the mechanical refrigeration unit being part of the heat exchanger.
A first refrigerant inlet of the heat exchanger is in fluid communication with a compressor exhaust outlet of the mechanical refrigeration device, and a first refrigerant outlet of the heat exchanger is in fluid communication with a throttling device inlet of the mechanical refrigeration device; and a second refrigerant inlet of the heat exchanger is in fluid communication with an outlet of the heat pipe condenser through a refrigerant flow adjusting device, and a second refrigerant outlet of the heat exchanger is in fluid communication with a gaseous refrigerant 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 and the second refrigerant inlet of the heat exchanger through a flow regulating device, respectively, and the gaseous refrigerant outlet of the heat pipe evaporator and the second refrigerant outlet of the heat exchanger are in fluid communication with the gaseous refrigerant inlet of the heat pipe condenser.
In one embodiment, the mechanical refrigeration device further comprises a dry filter in the refrigerant line between the outlet of the condenser of the mechanical refrigeration device and the liquid refrigerant inlet of the throttling device.
In one embodiment, the refrigeration system further comprises a gas-liquid separator and an accumulator in the refrigerant pipeline of the mechanical refrigeration device.
In one embodiment, the compressor may be a plurality of fixed frequency compressors connected in parallel, or a single inverter compressor connected in parallel with a single fixed frequency compressor or a plurality of fixed frequency compressors, or at least one fixed frequency compressor or at least one inverter compressor.
In one embodiment, the heat pipe condenser is evaporative cooling. But other cooling means may be used.
In one embodiment, the heat exchanger is a plate heat exchanger or a shell and tube heat exchanger.
The beneficial technical effects of the invention comprise:
(1) when the natural cold source mode operates independently, the refrigerant circulation between the indoor unit and the outdoor unit is passive, the energy consumption is zero, only the indoor fan and the outdoor fan consume electricity, and the energy efficiency ratio is extremely high.
(2) When the natural cold source and the mechanical cold source run in a combined mode, the natural cold source can be used for providing precooling for the mechanical cold source, the energy efficiency ratio is obviously improved, 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) The condenser, the evaporator and the compressor of the mechanical refrigerating device are installed in the same indoor unit, the system pipeline is short, the resistance of the system pipeline is effectively 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.
(5) The natural cold source and the mechanical cold source are in seamless butt joint, so that the running time of the compressor is greatly reduced, the reliability of the system is improved, and the service life of the compressor is prolonged.
(6) In the project of constructing a large-scale data center, the traditional refrigeration scheme needs one-time integral construction, the construction period is long, and one-time investment is large.
(7) The newly-built data center is often in a partial load operation state at the initial stage when the load cannot reach the design capacity, the traditional machine room air conditioner is configured according to the design load and redundancy, the energy consumption is high when the machine room air conditioner operates under a small load, the PUE value is often more than 2.0, the high energy efficiency ratio machine room heat pipe air conditioner has the advantages that the time for using a natural cold source all the year round is longer, and the energy efficiency ratio is higher in a partial load operation mode.
Drawings
Fig. 1 is a schematic diagram of the principle of the air conditioning system of the energy efficiency ratio machine room according to 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", "back", "high", "low" and other directional terms may be used for convenience of description only and should not be construed as limiting the invention in any way.
See fig. 1. An energy efficiency ratio room air conditioning system 100 of the present invention includes an indoor unit 20, an outdoor unit 10, a system pipe 30, and a control unit (not shown). The indoor unit 20 comprises a heat pipe evaporator 203, an indoor fan 201, flow regulating devices 207 and 208 and a mechanical refrigerating device; the evaporator 203 has a gaseous refrigerant outlet (not shown) and a liquid refrigerant inlet (not shown); the mechanical refrigeration device comprises a compressor 204, a condenser 206, a throttling device 205 and an evaporator 202. The outdoor unit 10 includes a heat pipe condenser 102 and an outdoor fan 101. The indoor unit 20 is in fluid communication with the outdoor unit 10 through a refrigerant line 30.
Also included in the indoor unit 20 in fig. 1 is a plate heat exchanger 206 ', wherein the condenser 206 is part of the plate heat exchanger 206'. 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 an 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 an outlet (not shown) of the flow regulator 207, and the second refrigerant outlet 2063 is in fluid communication with a gaseous refrigerant inlet (not shown) of the heatpipe condenser 102 and a gaseous refrigerant outlet (not shown) of the heatpipe evaporator 203, respectively.
When the natural cold source mode completely meets the requirement of the machine room cold, the liquid refrigerant (such as refrigerant R22 or environment-friendly refrigerant such as R410a, R134a, etc.) in the indoor heat pipe evaporator 203 absorbs the heat in the indoor environment through the circulating airflow action of the indoor fan 201, evaporates and changes into a gaseous state (i.e., phase change heat absorption), is conveyed to the gaseous refrigerant inlet of the outdoor heat pipe condenser 102 through the refrigerant pipeline 30 to enter the condenser, condenses the gaseous refrigerant in the outdoor heat pipe condenser 102 into a liquid state under the action of the outdoor fan 101, radiates the heat to the atmosphere at the same time, returns to the indoor flow regulator 208 through the refrigerant pipeline 30 under the action of gravity, flows into the heat pipe evaporator 203, completes one thermal cycle, and thus completes the indoor and outdoor heat transfer in a reciprocating manner. In this case, the mechanical refrigeration does not work, the flow regulating device 207 is turned off, and only the indoor fan 201 and the outdoor fan 101 consume power at this time, so that the energy efficiency ratio of the whole machine is extremely high.
When the natural cold source only meets part of heat exchange quantity, the mechanical cold source is started to supplement cold quantity, the whole cold quantity requirement of the machine room is met, namely the natural cold source and the mechanical cold source run jointly, in the heat pipe heat exchange system under the running mode, the indoor heat pipe evaporator 203 absorbs heat in the environment under the action of circulating air of the indoor fan 201, so that a refrigerant in the evaporator is evaporated and vaporized, enters the heat pipe condenser 102 through the system pipeline 30 to be condensed into a liquid refrigerant, and a part of the refrigerant flows into the heat pipe evaporator 203 after passing through the system pipeline 30 and the refrigerant flow regulating device 208, so that one-time thermodynamic cycle is completed, and precooling is provided for the mechanical refrigeration system; the other part of the refrigerant flows into a second refrigerant inlet 2064 of the plate heat exchanger 206 'through the flow regulating device 207 via the system pipeline 30 and enters the left side of the plate heat exchanger 206' to evaporate and absorb heat, so that a cold source is provided for a condenser of the mechanical refrigeration device; the gas-liquid mixed refrigerant in the evaporator 202 of the mechanical refrigeration device absorbs the heat of the indoor environment under the action of the indoor fan 201 to be vaporized into gaseous refrigerant, the gaseous refrigerant is compressed into high-temperature and high-pressure gaseous refrigerant by the mechanical refrigeration compressor to enter the first refrigerant inlet 2061, the gaseous refrigerant is condensed by the right side of the plate heat exchanger 206' to form liquid refrigerant, the liquid refrigerant flows through the throttling device 205 through the first refrigerant outlet 2062, the refrigerant in a gas-liquid mixed state formed by throttling enters the evaporator 202, and the thermodynamic cycle of primary mechanical refrigeration is completed. At this time, the right side of the plate heat exchanger 206 ' is the condenser 206 of the mechanical refrigeration device, the left side provides a cold source for the condenser, meanwhile, the refrigerant on the left side of the plate heat exchanger 206 ' absorbs the heat on the right side and evaporates into a gaseous refrigerant, the gaseous refrigerant in the condenser 102 rises into the outdoor condenser 102 through the refrigerant pipeline, the gaseous refrigerant is condensed into a liquid refrigerant under the action of the outdoor fan, the heat is released into the atmosphere, the liquid refrigerant passes through the refrigerant pipeline 30 under the action of its own gravity, a part of the liquid refrigerant flows into the heat pipe evaporator 203 through the flow regulating device 208 to continue to evaporate, and the other part of the liquid refrigerant flows into the second refrigerant inlet 2064 on the left side of the plate heat exchanger 206 ' through the flow regulating device 207 to enter the plate heat exchanger to evaporate and absorb heat, thereby. Under the working mode, the natural cold source provides precooling for the mechanical cold source, so that the mechanical refrigeration load is reduced, the energy efficiency ratio of the mechanical cold source is effectively improved, and the energy efficiency ratio of the whole machine is higher.
When the nature cold source can not provide cold volume for the computer lab, then provide cold volume for the computer lab by mechanical cold source completely, its heat transfer process is: an evaporator 202 of the mechanical refrigeration device absorbs ambient heat in a machine room under the action of circulating air of an indoor fan 201, internal refrigerant absorbs heat and is evaporated into gaseous refrigerant, the gaseous refrigerant is sucked by a compressor and is compressed into high-temperature gaseous refrigerant by the compressor, the high-temperature gaseous refrigerant enters a right-side condenser through a first refrigerant inlet 2061 of a plate heat exchanger 206 ' through a pipeline and is condensed into liquid refrigerant, the liquid refrigerant flows out through a first refrigerant outlet 2062 of the plate heat exchanger 206 ', is throttled by a throttling device 205 to form gas-liquid mixed refrigerant, the gas-liquid mixed refrigerant enters the evaporator 202 to be evaporated again, in the working mode, the refrigerant on the left side of the plate heat exchanger 206 ' absorbs heat on the right side and is evaporated into gaseous refrigerant, the gaseous refrigerant enters an outdoor condenser 102 through a system pipeline 30 to be condensed into liquid state, the heat is released into the atmosphere under the action of an outdoor fan 101, and the liquid refrigerant condensed in the condenser 102 flows through the pipeline 30, passes through a flow regulating device 207, and at the moment, the refrigerant flow adjusting device 208 is closed), a cold source is provided for the right side of the plate type heat exchanger 206', a heat exchange process is completed, and the energy efficiency ratio of the whole machine is higher than that of any machine room air conditioner in the prior art due to the fact that a system pipeline of the mechanical refrigerating device is short.
In conclusion, the machine room air conditioning system provided by the invention works in three modes, and the annual energy efficiency ratio is far higher than that of the machine room air conditioner in the prior art.
The compressor 204 in this embodiment may be one or more fixed frequency compressors connected in parallel, or one inverter compressor connected in parallel with one or more fixed frequency compressors, or at least one fixed frequency compressor or at least one inverter compressor. The condenser 102 in this embodiment may be an evaporative cooling system, but is not limited thereto.
The plate heat exchanger 206' in this embodiment is for illustration only, but not limited thereto. The heat exchanger may also take other forms, such as a shell and tube heat exchanger.
The indoor fan 201 in this embodiment may be used for both the heat pipe evaporator 203 and the mechanical refrigeration system evaporator 202, but an indoor fan may be provided for each of the heat pipe evaporator 203 and the mechanical refrigeration system evaporator 202.
The throttle device 205 in this embodiment may be an electronic expansion valve, but is not limited thereto.
The flow rate adjusting devices 207 and 208 in the present embodiment may be electronic expansion valves, but are not limited thereto.
The control unit 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 (10)
1. An air conditioning system of a machine room with high energy efficiency ratio comprises an indoor unit, an outdoor unit and a control unit, and is characterized in that 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 a compressor, a condenser, an evaporator and a throttling device; the outdoor unit comprises a heat pipe condenser and an outdoor fan; the control unit enables a mechanical refrigerating device in the system to stop working and be in a natural cold source working mode when the natural cold source heat pipe heat exchange system completely meets the heat exchange quantity requirement of a machine room; when the heat pipe heat exchange system of the natural cold source can only provide part of cold quantity requirements for the machine room, the mechanical refrigerating device is started and is in a combined working mode of the natural cold source and the mechanical cold source; when the natural cold source heat pipe heat exchange system can not directly provide cold for the indoor, the air conditioning system is in a mechanical cold source working mode to provide cold for the machine room, and the outdoor condenser of the heat pipe system provides a cold source for the mechanical refrigerating device.
2. The energy efficiency ratio machine room air conditioning system of claim 1 further comprising a heat pipe evaporator fan and a mechanical chiller evaporator fan.
3. The energy efficiency ratio machine room air conditioning system according to claim 1, wherein the mechanical refrigeration device further comprises a heat exchanger, and a condenser of the mechanical refrigeration device is a part of the heat exchanger.
4. The energy efficiency ratio machine room air conditioning system according to claim 3, wherein the first refrigerant inlet of the heat exchanger is in fluid communication with the exhaust outlet of the compressor, and the first refrigerant outlet of the heat exchanger is in fluid communication with the inlet of the throttling device; and a second refrigerant inlet of the heat exchanger is in fluid communication with the flow regulating device, and a second refrigerant outlet of the heat exchanger is in fluid communication with a gaseous refrigerant inlet of the heat pipe condenser.
5. The energy efficiency ratio computer room air conditioning system according to claim 4, wherein the liquid refrigerant outlet of the heat pipe condenser is in fluid communication with the liquid refrigerant inlet of the heat pipe evaporator and the second refrigerant inlet of the heat exchanger through a flow regulating device, respectively, and the gaseous refrigerant outlet of the heat pipe evaporator and the second refrigerant outlet of the heat exchanger are in fluid communication with the gaseous refrigerant inlet of the heat pipe condenser.
6. The energy-efficiency-ratio machine room air conditioning system as claimed in claim 1, wherein the compressor is a plurality of fixed-frequency compressors connected in parallel, or a single variable-frequency compressor connected in parallel with a single fixed-frequency compressor or a plurality of fixed-frequency compressors, or at least one fixed-frequency compressor or at least one variable-frequency compressor.
7. The energy efficiency ratio machine room air conditioning system according to claim 1, wherein the heat pipe condenser adopts an evaporative cooling method.
8. The energy efficiency ratio machine room air conditioning system according to claim 3, wherein the heat exchanger is a plate heat exchanger or a shell and tube heat exchanger.
9. The energy efficiency ratio machine room air conditioning system according to claim 1, wherein the throttling device is an electronic expansion valve.
10. The energy-efficient ratio machine room air conditioning system of claim 1, wherein the refrigerant flow regulating device is an electronic expansion valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010522733.7A CN111678198A (en) | 2020-06-10 | 2020-06-10 | High-energy-efficiency-ratio machine room air conditioning system |
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| CN202010522733.7A CN111678198A (en) | 2020-06-10 | 2020-06-10 | High-energy-efficiency-ratio machine room air conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112867373A (en) * | 2021-03-29 | 2021-05-28 | 北京中热信息科技有限公司 | Water-cooling heat pipe double-module machine room air conditioner multi-connected unit |
| CN113503585A (en) * | 2021-07-13 | 2021-10-15 | 北京突破智能科技有限公司 | Novel energy-saving air conditioning system |
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2020
- 2020-06-10 CN CN202010522733.7A patent/CN111678198A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112867373A (en) * | 2021-03-29 | 2021-05-28 | 北京中热信息科技有限公司 | Water-cooling heat pipe double-module machine room air conditioner multi-connected unit |
| CN113503585A (en) * | 2021-07-13 | 2021-10-15 | 北京突破智能科技有限公司 | Novel energy-saving air conditioning system |
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