CN103982960A - Air conditioner for data center - Google Patents
Air conditioner for data center Download PDFInfo
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- CN103982960A CN103982960A CN201410050294.9A CN201410050294A CN103982960A CN 103982960 A CN103982960 A CN 103982960A CN 201410050294 A CN201410050294 A CN 201410050294A CN 103982960 A CN103982960 A CN 103982960A
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Abstract
The invention discloses a fan coil air conditioner for cooling a data center. The air conditioner comprises an evaporator, a draught fan, a water flow regulating valve, a control box, an electrical air switch, a draught fan contactor and the like. The air supply form of a traditional freeze-water precise air conditioner is to supply air through a static pressure box formed by raising a floor; when air passes through a space below the floor, a turbulent flow is generated due to long-distance jet flow; consequently, the air flow fails to effectively cool a server, so that the energy waste of a draught fan system is caused; according to the air conditioner provided by the invention, as the static pressure air supply form formed by raising the floor is changed to direct upward air supply from the lower side of the floor, the path of air flow distribution is shortened greatly, and the resistance is decreased; for a product of the air conditioner, the structure and the air flow distribution form of the air conditioner for the data center are innovatively changed, so that the power consumption of the draught fan system is reduced in principle; the COP (Coefficient of Performance) of a unit can be improved by 50% in comparison with the COP of a traditional freeze-water air conditioner for the data center; the air conditioner is remarkable in energy saving effect.
Description
Technical field
The present invention relates to a kind of air-conditioning.
Background technology
Along with information-based develop rapidly, Internet data center (Internet Data Center) has become the most important ring of all trades and professions, and data center's energy consumption is very huge, wherein the energy consumption of refrigeration system can occupy the 35%-50% of whole data center energy consumption, even more.Wind pushing form under the traditional air-supply of the upper air-supply of the most of employing of data center's refrigeration form blast cap, air duct blow or floor, wherein the air supply mode of at present main flow is wind pushing form under floor.This form mainly utilizes the high electrostatic floor of data center's frame to form plenum chamber, grows the long-range air-supply of distance by plenum chamber, and air supplying distance often reaches 20 even 30 meters.In growing apart from jet distribution, because air exists viscosity, rub with ground, electrostatic floor bottom surface, floor lower prop, brace summer, water pipe, electric wire etc. and produce turbulent flow, cause cold to be effectively sent to server and take away heat, thereby cause air current composition decrease in efficiency, cause blower fan system power consumption to increase.
The factor that turbulent flow effect is weighed: Reynolds number
From the dimension one RANS formula (Navier-Stokes equations) of receiving of the sign fluid mobility matter set up according to Newton's second law, we can derive and obtain characterizing the flow expression formula of important dimensionless group one Reynolds number (Reynolds number) of viscosity of fluid.
Be converted into the expression-form of changing without therefore
During due to measuring tube inner fluid flow, often must understand its flow regime, velocity flow profile etc., the inertia force Fg when therefore defining fluid and flowing and the ratio of viscous force (internal friction) Fm are called Reynolds number.With symbol, Re represents.Re is a nondimensional number.
Can obtain the expression-form of Reynolds number
In formula:
V is mean flow rate (international unit: m/s)
D pipe diameter (be generally characteristic length, rectangular duct need be multiplied by equivalent coefficient) (m)
μ fluid dynamic viscosity (Pas or Ns/m
2)
V dynamic viscosity (v=μ/ρ) (m
2/ s)
ρ fluid density (kg/m
3)
Q volume flow (m
3/ s)
A cross-sectional area (m
2)
From above formula, the size of reynolds number Re depends on three parameters, i.e. viscosity under shaping size and the duty of the speed of fluid, a fluid stream.Reynolds number is little, means when fluid flows that in the highest flight, the each particle of fluid is parallel to pipeline inner wall and flows regularly the viscous force between each particle, is Laminar Flow state.Reynolds number is large, mean that inertia force in the highest flight, fluid is Turbulence Flow state, general pipeline reynolds number Re <2000 is laminar condition, Re>4000 is turbulent condition, Re=2000～4000 be transition state (the transition state here refers to that the flow regime of fluid is a kind of intermediateness between laminar flow and turbulent flow, and different fluid thoroughly to change the Reynolds number of turbulent flow into from laminar flow not identical).Under different flow regimes, the characteristics of motion of fluid. the distribution of flow velocity etc. is all different, thereby the mean flow rate υ of pipeline inner fluid and Peak Flow Rate υ
maxratio be also different.Therefore the size of Reynolds number has determined the flow behavior of viscous fluid.
From Reynolds number, fluid flow pattern is determined by following factors: (1) flow velocity.Easily there is laminar flow in flow velocity hour, turbulent flow occurs when flow velocity is large, and Here it is, and why great IDC center adopts plenum chamber requirement to control the wherein reason of wind speed below 3m/s; (2) pipe diameter.In the situation that other conditions are constant, there is laminar flow in pipe diameter little Yi, and turbulent flow occurs diameter great Yi; (3) viscosity.Easily there is laminar flow in the water body that viscosity is large, turbulent flow easily occurs the water body that viscosity is little.
In summary, when we are due to the designing requirement of plenum chamber, wind speed in plenum chamber need to be controlled to 3m/s left and right time, in the situation that air conditioning exhausting cross-section lengths is constant (being that machine room area is constant), its plenum chamber size can increase due to demand air quantity, the height that reflection directly perceived is exactly electrostatic floor needs to increase, the equivalent diameter D that is equivalent to air-out cross section increases, thereby can be obtained by the Reynolds number derivation of equation: under other parameter constant conditions, Reynolds number is directly proportional to floor level.
Due to above restriction, under floor will inevitably there is turbulent flow in wind pushing form, though control better, windage loss also at least more than 20%, cannot solve the turbulent problem of air-supply from principle.And there is great limitation for controlling the condition such as floor level, sealing plenum chamber in most of data center, cannot reach good effect, thereby cause air conditioning energy consumption serious, the chilled water fan coil air-conditioner COP that blows under floor (cold/blower fan power consumption) only can reach 20 left and right at present.Only have air supplying distance is shortened, reduce resistance, could effectively improve blower fan system efficiency, reach energy-conservation object.
Summary of the invention
It is exactly to cause the deficiency of cold waste in order to overcome above long distance air-supply turbulent flow that the present invention wants technical solution problem, has proposed the obvious air-conditioning of a kind of energy-saving effect.
Technical problem of the present invention is solved by following technical scheme: a kind of fan coil air-conditioner for data center's refrigeration, comprise that evaporimeter, blower fan, Water flow adjusting valve, control box, electric sky leave, blower fan contactor, also comprise vent valve, water inlet pipe, outlet pipe, chilled water intake-outlet, connecting hose, isolating valve, draining valve, water filter, balanced valve, external Temperature Humidity Sensor, static pressure transducer etc.Described chilled water is by balance pressure regulating valve, enter unit chilled water water inlet, enter evaporator coil through Water flow adjusting valve adjust flux and carry out heat exchange, air-flow after blower fan supercharging by discharging directly over unit, cold is after near the server heat exchange of rack, suck unit side return air inlet by rack perforated tiles behind, complete circulation.Flow control valve and air quantity of fan regulate logic according to formula: work as T
min<t<T
maxtime, Y=(1-p/P
max) * V & t<T
min, Y
min=10%V & t>T
max, Y
max=100%V controls.Wherein, Y is discharge quantity of fan or discharge; Y
minfor minimum discharge quantity of fan or discharge; Y
maxfor maximum discharge quantity of fan or discharge; T is that sensor detects near the temperature of rack, and p is static pressure transducer detected pressures value; P
maxfor setting in advance maximum static pressure value; V is blower fan maximum quantity of wind; T
minfor setting minimum temperature; T
maxfor setting maximum temperature.When the temperature detecting is lower than T
mixno matter how low static pressure is, blower fan is all according to minimum discharge quantity of fan and flow; When temperature is higher than T
max, blower fan is according to maximum quantity of wind and flow output; When temperature is in T
minand T
maxbetween, blower fan, according to the under-voltage percentage output of static pressure, detects static pressure higher, and air quantity output is less, and static pressure is higher, and air quantity output is larger.This design can realize air current composition path and shorten to 3-4 rice scope, avoid the long problem apart from a large amount of turbulent flows of jet generation, can regulate air quantity and cold output according near temperature and pressure rack simultaneously, export as required and regulate, thereby having increased substantially blower fan system efficiency.
Described air-conditioning draught fan form comprises axial flow blower and centrifugal blower, and its type of drive can be determines frequency or frequency conversion fan, or EC direct current outer rotor blower fan.Described air-conditioning draught fan can be arranged on evaporimeter top, adopts Suction Form, also can be arranged on evaporimeter bottom, adopts air draft form.
Described A/C evaporator coil form can be "/" shape or " V " type is arranged, water inlet can be on evaporimeter left side or right side.
Described return air inlet for air-conditioner can be in unit left side, right side or bottom.
Described air-conditioning flow control valve can be electronic or mechanical adjustment valve, and valve body form can be two-way Water flow adjusting valve or threeway Water flow adjusting valve or four-way discharge flow control valve.
Described air-conditioner controller can be arranged on unit inside, by Wireless remote control, and also can be by wired external control screen.
Described air-conditioning is according to remote temperature sensor or remote pressure sensor adjustment rotation speed of fan and Water flow adjusting valve.
Described air-conditioning is for data center, communications equipment room, server room.
The beneficial effect that the present invention is compared with the prior art is embodied in the following aspects; 1,, compared to traditional floor under-floor air distribution air-conditioning, turbulent flow and noise that long distance air-supply brings have been saved.Tradition floor under-floor air distribution air-conditioning main flow 150KW unit refrigeration work consumption (chilled water air-conditioning is power of fan) is about 9.2kW, and air quantity is that the 33000-38000 cube m/h of efficient EC blower fan of employing can reach 7.5kW, and its COP is in 16.6-20 left and right.And design parameter cold of the present invention can reach 7.3kW, power of fan 0.3kw, its COP can reach 24.3 left and right, compared to traditional air-conditioner efficiency adjustable height 21%-45%.2, the present invention has rationally utilized space under raised floor, thereby has saved the construction area of data center's preciousness, air-conditioning can be set in data center module and take up an area or air conditioning room.Same data center, adopts the comparable traditional floor of the present invention under-floor air distribution air-conditioning to save the floor space of 10%-20%.3, compared to traditional floor under-floor air distribution air-conditioning, the present invention distinguishes server cabinet and freezing water source from physical space, and server zone is without open fire, because air-conditioning is in whole room orlop, its condensed water also can be discharged from foot, is minimum to the water hidden danger of whole machine room.4, need whole plenum chamber air-supply compared to traditional floor under-floor air distribution air-conditioning, be limited by the impact of computer room structure and construction style, there is hot localised points, the present invention is freezed nearby, air-supply nearby, can fix a point to blow for server cabinet, more be conducive to realize the accurate refrigeration of whole machine room, ensure not occur hot localised points.5, adopt large blower fan to be difficult for the feature regulating compared to traditional floor under-floor air distribution air-conditioning, unit air quantity of the present invention is less, can regulate air quantity according to the remote temperature sensor of server cabinet installation nearby or wind pressure sensor, thereby realize and accurately control rotation speed of fan according to Single Cabinet caloric value, energy-conservation thereby maximization realizes.
Brief description of the drawings
Fig. 1 is set structure figure of the present invention.
Fig. 2 is the side view that the present invention installs in machine room.
Fig. 3 is the 3D effect figure of outward appearance of the present invention.
Fig. 4 is the present invention at the installation 3D effect figure of data center and rack, raised floor.
Fig. 5 is the air current composition CFD emulation 3D schematic diagram that the present invention installs in data center.
Fig. 6 is that design sketch is overlooked in the air current composition CFD emulation that the present invention installs in data center.
Fig. 7 is that design sketch is overlooked in the temperature field CFD emulation that the present invention installs in data center.
Figure 10 adopts EBM R3G400 blower fan, adopts plate evaporator level to install, and adopts professional evaporator designs software to calculate the result of calculation of unit refrigerating capacity.
Figure 11 adopts EBM R3G400 blower fan, adopts plate evaporator inclination 30 degree to install, and adopts professional evaporator designs software to calculate the result of calculation of unit refrigerating capacity.
Tu8Shi Mou data center adopts traditional floor under-floor air distribution air-conditioning because a large amount of turbulent CFD emulation airflow fields of air-flow that the factors such as layout and raised floor height cause are overlooked design sketch.Design sketch is overlooked in the more CFD simulated temperature field of hot localised points of Tu9Shi Ci data center.
In Fig. 1, illustrate: 1 blower fan; 2 electric-controlled boxes; 3 evaporator coils; 4 vent valves; 5 Water flow adjusting valves; 6 outlet pipes; 7 water inlet pipes; 8 chilled water intake-outlets; 9 connecting hoses; 10 isolating valves; 11 draining valves; 12 water filters; 13 balanced valves.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further details below by concrete embodiment.
The concrete structure of implementing:
As shown in Figure 1, a kind of air-conditioning, comprises 1 blower fan; 2 electric-controlled boxes; 3 evaporator coils; 4 vent valves; 5 Water flow adjusting valves; 6 outlet pipes; 7 water inlet pipes; 8 chilled water intake-outlets; 9 connecting hoses; 10 isolating valves; 11 draining valves; 12 water filters; 13 balanced valves and external Temperature Humidity Sensor and static pressure transducer (installation of sensors, on cabinet structure, can adopt hook form or magnet to install or be positioned over server cabinet inside).
As shown in Figure 2, unit is installed on data center's electrostatic floor below to described air-conditioning form, top air-out, and its top replaces data center floor to reduce resistance.Outlet size can be 600*600mm or other sizes.Unit height can design according to refrigeration requirement, and mounting means can adopt feet to install or steel bracket is installed.
As shown in Figure 3, unit casing adopts frame structure to described air-conditioning outward appearance, and blower fan is air-out straight up, side and bottom return air, and return side can be installed G3, G4 level screen pack.
Described air-conditioning as shown in Figure 4, is installed in the middle of server cabinet, is installed on cold gangway-floor below, server cabinet air-supply nearby.
Described air-conditioning as shown in Figure 5, air current composition centered by server cabinet, top supplying air, side and bottom return air.As shown in Fig. 6 top view, air current composition is effectively optimized.As shown in Figure 7, the temperature field of overall machine room is very even, and refrigeration is very good.
Fig. 8 is that traditional floor under-floor air distribution air-conditioning affects the CFD simulated effect figure of the air-supply turbulent air flow problem causing due to long apart from blowing and building the factors such as shape, floor level, pipeline.Can from Fig. 9, see, be subject to air supplying distance, construction style, floor underground pipelines, the server unequal problem of generating heat, cause air-supply turbulent flow serious, refrigeration is had a greatly reduced quality, and hot localised points problem is serious.
Described air-conditioning as shown in figure 10, Air-conditioner design coil lengths 480mm, 18 row, width 461mm, return air is according to 24 degree of GB50174-2008 standard, 50%RH, water inlet 7 degree, under water outlet 12 degree, face velocity 2.53 meter per seconds, 556 liters/second of air quantity, 0.29 liter/second of unit discharge, cold can reach 6.1KW, aobvious cold 6.1KW, sensible heat ratio 100%, is dry coil operation, basic evaporated condensation water produces, thereby has further reduced the machine room risk of leaking.
Described air-conditioning as shown in figure 11, Air-conditioner design coil lengths 480mm, 20 row, width 512mm, return air is according to 24 degree of GB50174-2008 standard, 50%RH, water inlet 7 degree, under water outlet 12 degree, face velocity 2.28 meter per seconds, 556 liters/second of air quantity, 0.36 liter/second of unit discharge, cold can reach 7.3KW, aobvious cold 6.7KW, sensible heat ratio 90%, is dry coil operation, basic evaporated condensation water produces, thereby has further reduced the machine room risk of leaking.
Above-mentioned air-conditioning is preferably used and data center, communications equipment room and server room.
Described invention control principle: chilled water is by balance pressure regulating valve, enter unit chilled water water inlet, enter evaporator coil through Water flow adjusting valve adjust flux and carry out heat exchange, air-flow after blower fan supercharging by discharging directly over unit, cold is after near the server heat exchange of rack, suck unit side return air inlet by rack perforated tiles behind, complete circulation.Flow control valve and air quantity of fan regulate logic according to formula: work as T
min<t<T
maxtime, Y=(1-p/P
max) * V; T<T
min, Y
min=10%V; T>T
max, Y
max=100%V controls.Wherein, Y is discharge quantity of fan or discharge, Y
minfor minimum discharge quantity of fan or discharge, Y
maxfor maximum discharge quantity of fan or discharge; T is that sensor detects near the temperature of rack, and p is static pressure transducer detected pressures value, P
maxfor setting in advance maximum static pressure value, V is blower fan maximum quantity of wind, T
minfor setting minimum temperature, T
maxfor setting maximum temperature.When the temperature detecting is lower than T
minno matter how low static pressure is, blower fan is all according to minimum discharge quantity of fan and flow; When temperature is higher than T
max, blower fan is according to maximum quantity of wind and flow output; When temperature is in T
minand T
maxbetween, blower fan, according to the under-voltage percentage output of static pressure, detects static pressure higher, and air quantity output is less, and static pressure is higher, and air quantity output is larger.This design can realize air current composition path and shorten to 3-4 rice scope, avoid the long problem apart from a large amount of turbulent flows of jet generation, can regulate air quantity and cold output according near temperature and pressure rack simultaneously, export as required and regulate, thereby having increased substantially blower fan system efficiency.
Above content is the further description of the present invention being done in conjunction with concrete preferred embodiment, can not assert that specific embodiment of the invention is only limited to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (11)
1. data center's air conditioner with blower and coiled tube, it is characterized in that described version, (1) be installed on shutter grid air-supply (3) bottom, (2) top, below, floor and side return air (4) blower fan or surface cooler upper and form.
2. the air-conditioning of explaining as claim 1, it is characterized in that being installed on electrostatic floor below in (1), top and floor flush (2) unit top be grid blinds air outlet (3) unit adopt Water flow adjusting valve control flow of inlet water (4) unit adopt blower fan air draft (6) unit adopt controller control (6) coolant media be water or other cold-producing mediums (7) single-unit cold at 1-10kW (8) for data center, for refrigerating server cabinet (9) air outlet direction adjustable.
3. as claim 1 or 2 air-conditioners of being explained, it is characterized in that described rotation speed of fan control mode can adopt constant speed blower fan or adjustable speed fan, blower fan form can adopt axial flow blower or centrifugal blower or EC outer rotor blower fan.
4. as claim 1 or 2 air-conditioners of being explained, it is characterized in that described flow control valve can adopt two-pass flow control valve or three-way flow regulating valve or four-way flow control valve.
5. as claim 1 or 2 air-conditioners of being explained, it is characterized in that described unit height, can change to some extent according to the surface cooler of the different colds of unit refrigerating capacity design different choice.
6. as claim 1 or 2 air-conditioners of being explained, it is characterized in that described generator set controller, can be installed on as required on unit or external.
7. as claim 1 or 2 air-conditioners of being explained, its control can be controlled according to temperature or pressure sensor parameter.
8. as claim 1 or 2 air-conditioners of being explained, its evaporimeter (surface cooler) form can adopt "/" type or " " type, installation form can adopt parallel installation or tilt to install V.
9. as claim 1 or 2 air-conditioners of being explained, its intake-outlet can be in unit any direction or bottom.
10. as claim 1 or 2 air-conditioners of being explained, its return air inlet can be in unit any direction or bottom.
11. as claim 1 or 2 air-conditioners of being explained, for data center, communications equipment room, server room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410050294.9A CN103982960A (en) | 2014-02-13 | 2014-02-13 | Air conditioner for data center |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410050294.9A CN103982960A (en) | 2014-02-13 | 2014-02-13 | Air conditioner for data center |
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|---|---|
| CN103982960A true CN103982960A (en) | 2014-08-13 |
Family
ID=51275034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410050294.9A Pending CN103982960A (en) | 2014-02-13 | 2014-02-13 | Air conditioner for data center |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222439A (en) * | 2015-10-19 | 2016-01-06 | 北京捷通机房设备工程有限公司 | Data center's air conditioning terminal energy-saving control device and control method |
| CN105839887A (en) * | 2016-05-19 | 2016-08-10 | 浙江红高梁木业有限公司 | Smart floor |
| US9795063B1 (en) | 2015-05-07 | 2017-10-17 | Dhk Storage, Llc | Computer server heat regulation utilizing integrated precision air flow |
| CN115773574A (en) * | 2022-11-04 | 2023-03-10 | 国网天津市电力公司 | Intelligent variable-angle air supply floor |
| CN117873246A (en) * | 2024-03-11 | 2024-04-12 | 河南才鸿电力安装有限公司 | Intelligent monitoring system for environmental parameters of power distribution room |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9795063B1 (en) | 2015-05-07 | 2017-10-17 | Dhk Storage, Llc | Computer server heat regulation utilizing integrated precision air flow |
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| CN105839887A (en) * | 2016-05-19 | 2016-08-10 | 浙江红高梁木业有限公司 | Smart floor |
| CN115773574A (en) * | 2022-11-04 | 2023-03-10 | 国网天津市电力公司 | Intelligent variable-angle air supply floor |
| CN117873246A (en) * | 2024-03-11 | 2024-04-12 | 河南才鸿电力安装有限公司 | Intelligent monitoring system for environmental parameters of power distribution room |
| CN117873246B (en) * | 2024-03-11 | 2024-05-17 | 河南才鸿电力安装有限公司 | Intelligent monitoring system for environmental parameters of power distribution room |
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Application publication date: 20140813 |
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