CN107975894B - Water distributor for cold accumulation tank, opening and installation method - Google Patents
Water distributor for cold accumulation tank, opening and installation method Download PDFInfo
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- CN107975894B CN107975894B CN201610927504.7A CN201610927504A CN107975894B CN 107975894 B CN107975894 B CN 107975894B CN 201610927504 A CN201610927504 A CN 201610927504A CN 107975894 B CN107975894 B CN 107975894B
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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
- F24F5/0017—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 using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
A water distributor for a cold accumulation tank and an opening and installation method, wherein the method comprises the following steps: 1) The design of the water distributor obtained through hydrodynamics meets the requirements that the Fr of the Frid criterion number is less than or equal to 1 and the Re of the Reynolds number is less than 2000, so that fluids with different temperatures in the cold accumulation tank can flow in a gravity way and form stable laminar flow; 2) To ensure that the reynolds number is less than 2000, the flow velocity v, Q' = Q/(Δt Cp ρ) through the water distributor is obtained as follows 1 )Re＝ρ 2 vd/eta < 20003) dividing the maximum flow Q' passing through the water distributor by the flow velocity v passing through the water distributor to obtain the minimum opening number of the water distributor; 4) Determining the final number of openings according to the minimum number of openings of the water distributor and the effective opening length of the water distributor; 5) The volume flow q of the water distributor in unit length is obtained by dividing the maximum flow of the water distributor by the effective aperture length, and 0 is substituted into a formula of Fr < 1: f (F) r ＝q/[gh 3 (ρ i ‑ρ a )/ρ a ] 1/2 And (2) obtaining the height h of the lowest water distribution hole of the water distributor from the inner surface of the cold accumulation tank bottom plate.
Description
Technical Field
The invention relates to a cold accumulation tank, in particular to a water distributor for the cold accumulation tank and an opening and installation method of the water distributor.
Background
The cold accumulation tank is used as a large-scale water storage container for water cold accumulation, is widely applied to the field of data centers, and is used as a backup cold source of the data centers. The cold accumulation tank is used for accumulating cold in a low-temperature low-electricity-price time period at night and discharging cold in a high-temperature high-electricity-price time period at daytime, so that peak-valley electricity prices and outdoor air temperature changes are effectively utilized to reduce electricity consumption and operation cost of an air conditioning system.
The working principle of the cold accumulation tank is to use the principle that natural layering is generated by different densities of cold water and hot water, so that the cold water is always positioned at the lower part of the cold accumulation tank under the condition of cold charging and cold discharging, the hot water is positioned at the upper part of the cold accumulation tank, and the cold water and the hot water are in a laminar flow state and are not mixed, so that the capacity of effective chilled water is not influenced.
The water distributor is used as an important part in the cold accumulation tank, is arranged at the top and the bottom of the cold accumulation tank, and is mainly used for controlling the flow rate of water entering and exiting the cold accumulation tank and preventing cold and hot water from entering the cold accumulation tank and mixing, so that the water flow entering and exiting the cold accumulation tank is stable, slow, uniform and undisturbed. In order to ensure the effect of the cold accumulation tank, the most important element is the number of openings and the opening area on the water distributor, but the number of openings and the opening area in the existing water distributor are usually 2 times of the area of the water supply and return pipelines, the problems of uneven openings, insufficient whole opening area and the like of the water distributor caused by unreasonable opening number and opening area exist, and then water flow disturbance is caused, so that the effective volume of cold accumulation is seriously influenced.
Disclosure of Invention
The invention aims to provide a water distributor for a cold storage tank, an opening and a mounting method, and the water distributor subjected to the opening treatment by the method saves about 1000 degrees of electricity per day after a certain large data center project is adopted through practical application.
The invention relates to an opening and installation method of a water distributor for a cold accumulation tank, wherein the water distributor is installed and fixed in the tank body of the cold accumulation tank, and comprises the following steps:
1) The design of the water distributor obtained through hydrodynamics meets the Fr < 1 and Re < 2000 requirements to keep the fluid in the cold storage tank in gravity flow and in laminar flow state without mixing;
2) To ensure that the Reynolds (Renolds) criterion number is less than 2000, the flow velocity v through the water distributor is obtained as follows,
Q`＝Q/(Δt*Cp*ρ 1 )
Re＝ρ 2 vd/η＜2000
wherein:
q' is the maximum flow through the water distributor;
cp is the specific heat of water;
q is the total cold quantity required to be provided by the cold accumulation tank;
ρ 1 average density of water at normal temperature;
ρ 2 the density of water at the inlet of the water distributor;
η is the running viscosity of the water inlet of the water distributor;
d is the diameter of the orifice of the water distribution hole in the water distributor;
Δt is the temperature difference between inlet water and outlet water of the water distributor;
re is a guaranteed Reynolds criterion number;
v is the flow rate through the water distributor;
3) Obtaining the minimum number of openings of the water distributor according to the maximum flow Q' passing through the water distributor divided by the flow velocity v passing through the water distributor;
4) Determining the final number of openings according to the minimum number of openings of the water distributor and the effective opening length of the water distributor;
5) Obtaining the volume flow of the water distributor in unit length according to the following formula according to the maximum flow and the effective opening length of the water distributor passing through the water distributor:
q＝Q`/L
wherein:
q is the volume flow of the water distributor in unit length;
q' is the maximum flow through the water distributor;
l is the effective aperture length of the water distributor;
6) Substituting the volume flow q of the water distributor in unit length into the formula that the Frrande criterion number Fr is less than or equal to 1:
F r ＝q/[gh 3 (ρ i -ρ a )/ρ a ] 1/2 ＜1
wherein:
fr is the Fr number of the inlet of the water distributor;
q is the volume flow of the water distributor in unit length;
g is gravity acceleration;
h is the height of the lowest water distribution hole of the water distributor from the bottom plate of the cold accumulation tank;
ρ i the water density of the inlet of the water distributor;
ρ a the water density of the outlet of the water distributor;
the height h of the lowest water distribution hole of the water distributor from the inner surface of the cold accumulation tank bottom plate is obtained, so that the water distributor can be installed according to the height h, and stable, slow, uniform and undisturbed water flow in the water distributor is ensured.
The volume flow q of the water distributor per unit length in the step 5) is increased to be less than 0.025m for meeting the gravity flow condition 3 And (3) checking (m.s).
The water distributor for the cold accumulation tank is H-shaped and comprises an upper water distributor and a lower water distributor, wherein the middle positions of the upper water distributor and the lower water distributor are connected and supported through upright pipes, the upper water distributor and the lower water distributor both comprise middle steel pipes which are fixedly connected with the upright pipes, a plurality of branched pipes are symmetrically distributed at 180 degrees on two sides of the middle steel pipes, and water distribution holes are uniformly formed in the surface of each branched pipe.
Twenty-two branch pipes are symmetrically distributed on two sides of the middle steel pipe, and the interval distance between every two adjacent branch pipes is the same.
The branch pipes are fixedly connected to two sides of the middle steel pipe through flanges.
The water distribution holes are positioned in the same section of the branch pipe in a fan-shaped arrangement mode of every 10 water distribution holes, the distance between every two adjacent sections is 20mm, and the 10 water distribution holes in the same section are intensively distributed on the arc-shaped surface of one half of the branch pipe.
The 10 water distribution holes in the same cross section are distributed on two adjacent quarter arc surfaces of the same cross section of the branch pipe in an axisymmetric mode, 15 degrees are spaced between the central lines of the two adjacent water distribution holes in the same cross section, and 30 degrees are spaced between the two water distribution holes in the middle.
The water distribution holes formed in the upper water distributor are upward in installation, and the lower water distributor is installed in the direction of the bottom plate of the cold accumulation tank.
After the water distributor is adopted, cold and hot water in the cold storage tank is in a laminar flow state, the effective capacity of cold storage is increased, the cold storage efficiency is improved, the cold release time is effectively prolonged, and a large amount of electric energy is saved finally.
Drawings
Fig. 1 is a schematic diagram of the working principle of the cold accumulation tank in the invention, and the working states of two different states of cold charging and cold discharging are shown in the diagram.
Fig. 2 is a schematic structural diagram of the water distributor in the cold accumulation tank.
Fig. 3 is a schematic diagram of a structure in which a water distributor is disposed in a cold storage tank.
Fig. 4 is a schematic cross-sectional view taken along line A-A in fig. 3.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the cold accumulation tank utilizes the principle of natural layering generated by different densities of cold water and warm water, and in the cold charging stage, the cold water is fed through a water distributor at the bottom of the tank, and the warm water flows out through the water distributor at the top of the tank; in the cooling stage, cold water flows out through the water distributor at the bottom of the tank, and warm water flows in through the water distributor at the top of the tank, so that the cold water with high density is always positioned at the lower part of the cold storage tank in the cooling and cooling stage, and the warm water with low density is always positioned at the upper part of the cold storage tank.
In order to prevent cold water and warm water entering the cold storage tank from being mixed, the invention designs an H-shaped water distributor which comprises an upper water distributor 1 close to the inner water surface of the cold storage tank and a lower water distributor 2 close to the bottom plate of the cold storage tank, and the water flow is kept stable, slow, uniform and undisturbed.
As shown in fig. 2, the upper water distributor 1 and the lower water distributor 2 are connected and supported by an upright pipe 3, and a water supply pipe 4 connected with a chilled water system is arranged at a position above the lower water distributor 2 at the lower half part of the upright pipe 3.
As shown in fig. 2 and 3, the upper water distributor 1 and the lower water distributor 2 have the same structure and comprise middle steel pipes 5, the middle of each middle steel pipe 5 is fixedly connected with the end part of the upright pipe 3 and is in an internal communication shape, and the middle steel pipes 5 at the upper end and the lower end of the upright pipe 3 are parallel to each other, so that the whole water distributor is in an H shape after being placed in the cold storage tank. Taking a cold accumulation tank body with the diameter of 5120mm as an example, 20mm gaps are reserved between the upper water distributor 1 and the lower water distributor 2 and the inner wall of the cold accumulation tank body, a seamless steel pipe with the diameter of 530mm and the wall thickness of 8mm is adopted as the middle steel pipe 5, the total length of 4000mm, eleven branch pipes 6 are symmetrically welded and fixed on two side edges of the middle steel pipe 5 at 180 degrees, the lengths of the branch pipes 6 positioned in the middle are longest, the two sides of the longest branch pipe 6 are sequentially and equidistantly arranged in sequence, the longest branch pipe 6 is positioned in the middle, and the middle point line of the longest branch pipe 6 is used as a reference, and the branch pipes are arranged at intervals of 350 mm. The length of the middle longest branch pipe 6 is 1945mm, the lengths outwards are 1905mm, 1815mm, 1660mm, 1425mm and 1080mm in sequence, and seamless steel pipes with diameters of 159mm and wall thicknesses of 4.5mm are adopted as the branch pipes 6. The middle end of the branch pipe 6 is connected with the middle steel pipe 5 through a flange 7.
The cold storage tank is used for a data center with an area of 2 ten thousand square meters, a cold load (total cold quantity Q required by a machine room) of 8958kw, a chilled water supply and return temperature of 12-18 ℃, namely a temperature difference delta t of 6 ℃, a specific heat Cp of water of 4.2KJ/kg ℃ and a normal temperature average density of water of ρ of 1000kg/m 3 The diameter of the water supply and return pipe of the chilled water storage is 450mm, the diameter of the water distribution hole opening is 0.012m, and the density rho= 999.474kg/m of 12 ℃ water in the water inlet 3 For example, the running viscosity η=1.2363×10-3 Ns/square meter of 12 ℃ water in the water inlet is designed and arranged in a manner of 2 times of the area of the water supply and return pipeline, and the water distribution holes of the water distributor are specifically as follows:
water distributor cross-sectional area S1= (0.45/2) of water supply and return pipes 2 *3.14＝0.159㎡
Open area of water distributor = cross-sectional area of water supply and return pipes s1=2=0.318 square meter
Number of openings n=s1/orifice area=0.318/((0.012/2)) 2 *3.14 =2815
In order to uniformly distribute the water distribution holes on the branch pipes 6, the hole spacing is 50mm, so that the actual number of holes is 3066, and the requirement that the number of holes N1 is more than 2815 is met.
Open area s1=number of openings aperture area=3066×pi 0.012 2 And/4=0.347 square meter, which is substantially the same as 2 times the cross-sectional area of the water supply and return pipes. However, the water distributor can lead to severe fluid mixing in practical application, and reduces cold storage capacity and cold storage time.
The invention provides a new design method, which comprises the following steps:
the same data center described above is still taken as an example.
Firstly, according to fluid mechanics, if the design of the water distributor can meet the requirements that the Fr of the Fr criterion number is less than or equal to 1 and the Re of the Reynolds number is less than 2000, the volume flow of the water distributor per unit length is less than 0.025, the fluid in the cold storage tank can be kept in gravity flow and in a laminar flow state without mixing, so that the capacity of effective chilled water in the cold storage tank where the water distributor is positioned is not influenced.
Secondly, in order to ensure that the Reynolds criterion number is less than 2000, the flow velocity v through the water distributor can be obtained according to the following formula,
maximum flow rate Q' through the water distributor=q/(Δt×cp) =8958/(6×4.2×1000) =0.355 m 3 /s
In order to satisfy: re=ρvd/η=999.474×v×0.012/1.2363×10-3 < 2000
Wherein: ρ is the density of the inlet water ρ= 999.474kg/m 3
Eta is the running viscosity of the water inlet eta=1.2363 x 10 < -3 > Ns/' square meter
d is the diameter d=0.012 m of the water distribution hole
Obtaining the flow velocity v < 0.21m/s through the water distributor
Number of openings of water distributor = maximum flow Q' through water distributor/flow velocity v through water distributor x open area S2
The number of openings of the water distributor n=q'/v s2=0.355/0.21 ((0.012/2)) 2 *3.14 =14960 (individual)
I.e. the number of openings of the water distributor must be greater than 14960.
According to the number of openings of the water distributors, the effective length l=2 {1.945×2+ (1.905+1.815+1.66+1.425+1.08) ×4} =35.43×2=70.83 m of all branch pipes 6 in the upper water distributor 1 and the lower water distributor 2, and in order to ensure uniform distribution of the water distribution holes 8 on the branch pipes 6, the requirement that the number of openings of the water distributors is 18950 and is greater than 14960 is determined, namely that every 10 water distribution holes 8 are in a fan-shaped arrangement in the same section of the branch pipes 6, the interval between every two adjacent sections is 20mm, namely that the opening interval is 20mm, and the 10 water distribution holes 8 in the same section are intensively distributed on one half arc surface of the branch pipes 6 and are axially symmetrically distributed on two adjacent quarter arc surfaces of the same section of the branch pipes 6, as shown in fig. 4, the interval between the center lines of the adjacent two water distribution holes 8 in the same section is 15 degrees, and the interval between the two water distribution holes in the middle is 30 degrees. As shown in fig. 1, the upper water distributor 1 is installed with the water distribution holes 8 upwards and then the branch pipes 6 are fixed, so that the water distribution holes 8 in the upper water distributor 1 are close to the water surface in the cold storage tank, the lower water distributor 2 is installed with the water distribution holes 8 towards the bottom plate of the cold storage tank, so that the lower water distributor 2 is close to the bottom plate of the cold storage tank, but a certain height is required between the water distribution hole at the lowest end and the bottom plate of the cold storage tank, and the Fr standard number is not more than 1 only when the height is ensured.
Checking the volume flow of the water distributor in unit length according to the number and the area of the openings of the water distributor:
q＝Q`/(L*2)＝0.355/(35.43*2)＝0.005＜0.025
wherein:
volume flow of unit length of q-water distributor, unit is m 3 /(m·s)；
Q' -maximum flow through the water distributor, unit is m 3 /s；
The effective length of the L-water distributor is m.
The volume flow q of the unit length of the water distributor is less than 0.025.
Then q=0.005 is substituted into the formula that the Fr of the frank (frank) criterion number is less than or equal to 1, the height h of the lowest water distribution hole of the lower water distributor 2 from the bottom plate of the cold storage tank can be obtained, so that the installation position of the water distributor in the cold storage tank can be determined,
F r ＝q/[gh 3 (ρ i -ρ a )/ρ a ] 1/2 ＜1
fr-water distributor the frank number of the inlet;
volume flow of unit length of q-water distributor, unit is m 3 /(m·s)；
g-gravitational acceleration is 9.81m/s2;
h, the lowest water distribution hole of the lower water distributor is at a distance from the bottom plate of the cold accumulation tank;
h=0.412 m results.
Open area s1=number of openings aperture area= 18950 pi 0.012 2 /4＝2.14㎡
Is far more than 2 times of the sectional area of the water supply and return pipes. The cold and hot water in the cold storage tank is ensured to maintain a stable laminar flow state. The effective capacity of cold accumulation is increased, the cold accumulation efficiency is improved, and the cold release time is effectively prolonged.
The branched pipe 6 is subjected to hot galvanizing after the punching process.
Claims (8)
1. The utility model provides an trompil and installation method that is used for cold-storage tank's water-locator, the water-locator is installed and is fixed in cold-storage tank's jar body, includes following step:
1) The design of the water distributor obtained through hydrodynamics meets the Fr < 1 and Re < 2000 requirements to keep the fluid in the cold storage tank in gravity flow and in laminar flow state without mixing;
2) To ensure that the Reynolds (Renolds) criterion number is less than 2000, the flow velocity v through the water distributor is obtained as follows,
Q`＝Q/(Δt*Cp*ρ 1 )
Re＝ρ 2 vd/η＜2000
wherein:
q' is the maximum flow through the water distributor;
cp is the specific heat of water;
q is the total cold quantity required to be provided by the cold accumulation tank;
ρ 1 average density of water at normal temperature;
ρ 2 is the water inlet water density of the water distributorA degree;
η is the running viscosity of the water inlet of the water distributor;
d is the diameter of the orifice of the water distribution hole in the water distributor;
Δt is the temperature difference between inlet water and outlet water of the water distributor;
re is a guaranteed Reynolds criterion number;
v is the flow rate through the water distributor;
3) Obtaining the minimum number of openings of the water distributor according to the maximum flow Q' passing through the water distributor divided by the flow velocity v passing through the water distributor;
4) Determining the final number of openings according to the minimum number of openings of the water distributor and the effective opening length of the water distributor;
5) Obtaining the volume flow of the water distributor in unit length according to the following formula according to the maximum flow and the effective opening length of the water distributor passing through the water distributor:
q＝Q`/L
wherein:
q is the volume flow of the water distributor in unit length;
q' is the maximum flow through the water distributor;
l is the effective aperture length of the water distributor;
6) Substituting the volume flow q of the water distributor in unit length into the formula that the Frrande criterion number Fr is less than or equal to 1:
F r ＝q/[gh 3 (ρ i -ρ a )/ρ a ] 1/2 ＜1
wherein:
fr is the Fr number of the inlet of the water distributor;
q is the volume flow of the water distributor in unit length;
g is gravity acceleration;
h is the height of the lowest water distribution hole of the water distributor from the bottom plate of the cold accumulation tank;
ρ i the water density of the inlet of the water distributor;
ρ a the water density of the outlet of the water distributor;
the height h of the lowest water distribution hole of the water distributor from the inner surface of the cold accumulation tank bottom plate is obtained, so that the water distributor can be installed according to the height h, and stable, slow, uniform and undisturbed water flow in the water distributor is ensured.
2. The method according to claim 1, wherein the increase of the volumetric flow rate q per unit length of the water distributor in the step 5) is less than 0.025m to satisfy the gravity flow condition 3 And (3) checking (m.s).
3. The water distributor for the cold accumulation tank prepared by the method in the claim 1 or 2 is characterized in that the water distributor is H-shaped and comprises an upper water distributor and a lower water distributor, the middle positions of the upper water distributor and the lower water distributor are connected and supported through upright pipes, the upper water distributor and the lower water distributor both comprise middle steel pipes which are fixedly connected with the upright pipes, a plurality of branched pipes are symmetrically distributed at two sides of the middle steel pipes at 180 degrees, and water distribution holes are uniformly formed in the surface of each branched pipe.
4. A water distributor for a cold accumulation tank according to claim 3 wherein the branching pipes are twenty-two in total and symmetrically distributed on both sides of the intermediate steel pipe, and the distances between every two adjacent branching pipes are the same.
5. The water distributor for a cold storage tank of claim 4, wherein the branch pipes are fixedly connected to both sides of the middle steel pipe via flanges.
6. A water distributor for a cold storage tank according to claim 3, wherein the water distribution holes are located in the same section of the branched pipe in a manner that every 10 water distribution holes are arranged in a fan shape, the interval between every two adjacent sections is 20mm, and 10 water distribution holes in the same section are intensively distributed on one half of the arc-shaped surface of the branched pipe.
7. The water distributor for a cold accumulation tank according to claim 6 wherein 10 water distribution holes in the same section are distributed on two adjacent quarter arc surfaces of the same section of the branch pipe in an axisymmetric manner, the center lines of the adjacent two water distribution holes in the same section are spaced by 15 degrees, and the interval between the two water distribution holes in the middle is 30 degrees.
8. The water distributor for a cold storage tank according to claim 7, wherein water distribution holes formed in the upper water distributor are upward when installed, and water distribution holes formed in the lower water distributor are toward a bottom plate of the cold storage tank.
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| CN201610927504.7A CN107975894B (en) | 2016-10-24 | 2016-10-24 | Water distributor for cold accumulation tank, opening and installation method |
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| CN201610927504.7A CN107975894B (en) | 2016-10-24 | 2016-10-24 | Water distributor for cold accumulation tank, opening and installation method |
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| CN203757934U (en) * | 2014-03-28 | 2014-08-06 | 山东中瑞新能源科技有限公司 | Space radiation refrigerator as auxiliary cold source |
| CN104180452A (en) * | 2014-08-27 | 2014-12-03 | 中山市蓝水能源科技发展有限公司 | Naturally-stratified chilled water storage device |
| CN105444312A (en) * | 2015-12-30 | 2016-03-30 | 广州高菱能源技术有限公司 | Cool storage type water tank applied to air conditioning system |
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2016
- 2016-10-24 CN CN201610927504.7A patent/CN107975894B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4579692A (en) * | 1985-04-02 | 1986-04-01 | The Marley Cooling Tower Company | Water distribution method and flume for water cooling tower |
| CN203163135U (en) * | 2013-03-01 | 2013-08-28 | 深圳达实智能股份有限公司 | Water-cold-storage water feeding and distributing device |
| CN103335539A (en) * | 2013-07-04 | 2013-10-02 | 南京大洋冷却塔股份有限公司 | Safe and environment-friendly cooling tower without draught fan and power energy consumption |
| CN103335541A (en) * | 2013-07-10 | 2013-10-02 | 信发科技开发有限公司 | Improved washing water heater and making method thereof |
| CN203757934U (en) * | 2014-03-28 | 2014-08-06 | 山东中瑞新能源科技有限公司 | Space radiation refrigerator as auxiliary cold source |
| CN104180452A (en) * | 2014-08-27 | 2014-12-03 | 中山市蓝水能源科技发展有限公司 | Naturally-stratified chilled water storage device |
| CN105444312A (en) * | 2015-12-30 | 2016-03-30 | 广州高菱能源技术有限公司 | Cool storage type water tank applied to air conditioning system |
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