Conventional type
（1） Main technical parameters
Pure water side
Water quality: ≤ 5 μ s/cm (ordinary level: suitable for host working voltage not exceeding 630V), ≤ 1 μ s/cm (high-purity grade: suitable for host working pressure of 630-1250V);
Water pressure: adjustable according to the requirements of the rectifier unit
Water temperature: ≤ 35-38 ℃ (main and auxiliary water medium temperature difference Δ t ≤ 10 ℃).
Cooling medium side payment
Water quality: suspended solids ≤ 20mg/L (no visible turbidity);
PH value: 6-9
Hardness: ≤ 12 ° (German degree) (water water)
Imported water pressure: 0.08MPa+external pipeline resistance;
Inlet water temperature: 5-30 ℃
Pay water flow rate: the same as the main water flow rate;
Product execution standards： JB/5833-91
（2） Working Process Principle
This product consists of components such as a heat exchanger, ion exchanger pump assembly, high-level expansion water tank, pipeline, and electrical control. The water water heat exchanger adopts a corrugated flat plate type, and the water air heat exchanger adopts a rolled tube fin type. Its heat transfer principle is to transfer the heat of the heat carrying pure water flowing in from the rectifier to the outside of the water output machine through inter wall heat transfer. The cooled pure water is pressurized and returns to the rectifier water channel, repeating the cycle and forming a closed loop cooling circuit. The ion exchanger adopts a mixed bed form to produce pure water to maintain the main circuit at rated water quality. The pump set consists of two stainless steel water pumps that work and are backup to each other, serving as the power source for the main circuit. The high-level expansion water tank is placed higher than the load host and has the function of automatic gas collection and exhaust. The main circuit pipeline is connected to the cooling water channel of the load host through an external connection to form a closed loop. All containers and main water pipelines inside the machine are made of stainless steel material.
The electrical control section is equipped with automatic power switching, numerical indicators for water temperature, water pressure, water quality, flow rate, liquid level, and corresponding sound and light alarm systems, and reserved remote control alarm output terminals and comprehensive automation interfaces.
This machine integrates advanced design solutions from both domestic and international sources, with the advantages of reasonable structure, convenient maintenance, and stable and reliable operation; High heat exchange efficiency, good water quality stability, automatic switching of pump units and valves, low noise, and no leakage; It has excellent circuit intake and automatic exhaust functions, complete and reliable electrical control, numerical display, sound and light indication, alarm and other functions.
（3） Parameter table of conventional water water cooling device
|
Model specifications
|
cooling capacity
（KW）
|
Pure water flow rate
（t/h）
|
Main water pipeline interface diameter (mm)
|
Whole machine power
（KW）
|
Whole machine weight (kg)
|
|
LSS-20
|
20
|
6
|
40
|
2.2
|
600
|
|
LSS-30
|
30
|
8
|
40
|
2.2
|
650
|
|
LSS-40
|
40
|
10
|
50
|
3
|
700
|
|
LSS-50
|
50
|
12
|
50
|
3
|
750
|
|
LSS-50B
|
950
|
|
LSS-60
|
60
|
14
|
50
|
3
|
800
|
|
LSS-60B
|
1030
|
|
LSS-80
|
80
|
16
|
65
|
4
|
900
|
|
LSS-80B
|
1300
|
|
LSS-100
|
100
|
18
|
65
|
4
|
1000
|
|
LSS-100B
|
1400
|
|
LSS-125
|
125
|
22
|
65
|
4
|
1100
|
|
LSS-125B
|
1500
|
|
LSS-150
|
150
|
26
|
65
|
5.5
|
1200
|
|
LSS-150B
|
1600
|
|
LSS-200
|
200
|
35
|
80
|
5.5
|
1350
|
|
LSS-200B
|
1800
|
|
LSS-250
|
250
|
42
|
80
|
7.5
|
1450
|
|
LSS-250B
|
2000
|
|
LSS-315B
|
315
|
54
|
100
|
7.5
|
2150
|
|
LSS-350B
|
350
|
60
|
|
7
|
2300
|
|
LSS-450B
|
450
|
75
|
|
11
|
2800
|
|
LSS-450B3
|
3000
|
|
LSS-550B3
|
550
|
90
|
|
11
|
3300
|
|
LSS-650B3
|
650
|
105
|
|
11
|
3600
|
|
LSS-700B3
|
700
|
115
|
|
15
|
4000
|
Note: For high-purity water quality, add G after the rated capacity indicated in the drawing, such as LSS-150BG
Intelligent
1Main technical parameters
Pure water side
Water supply temperature: ≤ 45 ℃, ≥ dew point temperature in the valve hall;
Temperature difference between inlet and outlet: ≤ 10℃；
Conductivity: circulation loop ≤ 0.5 μ s/cm, ion exchanger outlet ≤ 0.2 μ s/cm;
Cooling medium side payment
Water supply pressure: ≥ 0.25MPa；
Water supply temperature: ≤ 38℃；
Suspended solids: ≤ 30mg/L；
Hardness: ≤ 8 ° (German degree).
Product execution standards： DL/T1010·5-2006
IIWorking Process Principle
This machine consists of a pure water main circulation circuit, a secondary cooling circuit, a pure water preparation and replenishment circuit, a water quality improvement and stabilization circuit, and a nitrogen flushing buffer water tank.
(1) Pure water main circulation loop
The pressurized cooled pure water output from the pure water outlet of the machine enters the valve internal water distribution pipeline through the external pipeline, absorbs the heat transferred by the valve components, and outputs as heat carrying pure water. It then enters the pure water inlet of the machine through the external pipeline; The returned heat carrying pure water enters the heat exchanger and transfers the heat carried by it to the cooling medium (industrial cooling water or forced air) through the partition heat transfer method to form cooling pure water. After removing free air from the degassing tank, it is pressurized by the main circulation pump. The pressurized cooling pure water is output from the pure water outlet through a filter and re enters the valve water channel to absorb heat; This cycle repeats itself, forming a closed loop cooling circuit.
(2) Pay for cooling circuit
The industrial cooling water enters the plate heat exchanger through a filter to absorb the heat transferred by pure water, and then outputs it. After being cooled by the external water pipeline and the external water cooling system, it returns to the inlet of the machine's cooling system, thus forming a cooling cycle for the cooling water.
(3) Pure water preparation supplementary circuit
When the system needs to replenish pure water during the initial use and operation of this machine, primary pure water is added to the replenishment tank or tap water is introduced from the pipeline through the water ion exchanger to form ultrapure water, which enters the buffer tank and is then pressurized by the main water pump and collected into the main circuit.
(4) Water quality improvement and stabilization circuit
The water quality of pure water gradually decreases due to various factors during the circulation process. Therefore, a circulating ion exchanger bypass is installed in the main circuit to continuously input ultrapure water into the main circuit to improve and stabilize the water conductivity of the main circuit within the set range.
(5) Nitrogen filled buffer water tank stabilizing circuit
The nitrogen pressure tank receives ultrapure water output from the ion exchanger, which is transferred in the tank and returned to the main circuit, forming a bypass circulation branch with the main circuit. Maintain the rated nitrogen pressure inside the tank. When the water volume in the main circuit decreases, the water tank will fill the circuit with water at its own pressure to maintain the circuit always full; When the temperature of the circuit increases and causes an increase in the volume of pure water, the water tank absorbs the increased amount of pure water and automatically exhausts when the pressure reaches the upper limit. Due to the constant filling of nitrogen in the water tank, CO in the air can be avoided2With O2Pollution of pure water.
IIIElectrical monitoring system
The electrical monitoring system of this closed-loop cooling device is based on PLC programming control, which monitors and instructs the intelligent operation of various mechanical and electrical units. The LCD screen displays online parameters and dynamic images of temperature, pressure, flow rate, water quality, water level, etc. at various points of the cooling system. The touch operated TP panel converts multiple monitoring functions: operation screen, operation screen, historical information screen, parameter setting screen, and help screen.
1) Primary circuit: The primary circuit is equipped with short-circuit, overcurrent, overvoltage, and phase loss protection. All faults and operational information are transmitted in real-time to the display screen and upper computer.
2) Secondary circuit: The secondary circuit has three modes of operation: manual/stop/automatic, which are completed through touch operation.
3) Monitoring of pure water temperature in the main circulation loop
The main circuit pure water temperature intelligent control system is composed of PLC, temperature module, temperature sensor, actuator, etc. The PLC collects the temperature signal of pure water during operation, compares and calculates it with the set value, and sends action instructions to the actuator to complete the main circuit pure water intelligent control program.
4) The actuator of water water heat exchange is an electric proportional valve, which controls the temperature of pure water entering the valve by changing the valve angle, adjusting the amount of water entering the heat exchanger, and the ratio of water to the bypass (not participating in cooling) of the heat exchanger.
5) The local monitoring system is equipped with a standard communication interface and is connected in series with the backend for uploading, sending operational information, and receiving backend commands. The specific information content of the monitoring system is shown in the table below:
|
Serial Number
|
content
|
level
|
|
Serial Number
|
content
|
level
|
|
1
|
The power supply is normal
|
state
|
26
|
Low pure water flow rate
|
Warning (adjustable)
|
|
2
|
Control power supply is normal
|
state
|
27
|
The conductivity of pure water is relatively high
|
Warning (adjustable)
|
|
3
|
Manual Control
|
state
|
28
|
Low pressure in buffer tank
|
Warning (adjustable)
|
|
4
|
automatic control
|
state
|
29
|
Buffer tank pressure is too high
|
Warning (adjustable)
|
|
5
|
The No.1 pure water pump is working
|
state
|
30
|
Low liquid level in buffer tank
|
Warning (adjustable)
|
|
6
|
The No.2 pure water pump is working
|
state
|
31
|
The pure water filter is clogged
|
early warning
|
|
7
|
Water pump working
|
state
|
32
|
Low water pressure for payment
|
early warning
|
|
8
|
Electric heater working
|
state
|
33
|
High water pressure for payment
|
early warning
|
|
9
|
The intake valve is working
|
state
|
34
|
The water filter is clogged
|
early warning
|
|
13
|
No.1 pure water pump malfunction
|
early warning
|
38
|
System leakage
|
early warning
|
|
14
|
No.2 pure water pump malfunction
|
early warning
|
39
|
CPU malfunction
|
early warning
|
|
15
|
Water pump malfunction
|
early warning
|
40
|
Inlet valve pressure is ultra-low
|
Request to exit (customizable)
|
|
16
|
Electric proportional valve malfunction
|
early warning
|
41
|
Excessive pressure at the inlet valve
|
Request to exit (customizable)
|
|
17
|
Electric heater malfunction
|
early warning
|
42
|
The main circuit flow is ultra-low
|
Request to exit (customizable)
|
|
18
|
The inlet valve temperature is too high
|
Warning (adjustable)
|
43
|
The conductivity of the main circuit is extremely high
|
Request to exit (customizable)
|
|
19
|
The outlet valve temperature is too high
|
Warning (adjustable)
|
44
|
The temperature of the water entering the valve is too high
|
Request to exit (customizable)
|
|
20
|
Low inlet valve temperature
|
Warning (adjustable)
|
45
|
The outlet water temperature is too high
|
Request to exit (customizable)
|
|
21
|
Valve pipeline near dew point
|
early warning
|
46
|
Buffer tank liquid level is too low
|
Request to exit (customizable)
|
|
22
|
The inlet pressure is too high
|
Warning (adjustable)
|
47
|
System leakage
|
Request to exit (customizable)
|
|
23
|
Low inlet valve pressure
|
Warning (adjustable)
|
48
|
Power supply failure
|
Request to exit (customizable)
|
|
24
|
The outlet pressure is too high
|
Warning (adjustable)
|
49
|
Upper limit of inlet and outlet valve temperature
|
Trip (delayed for 3 seconds)
|
|
25
|
Low outlet valve pressure
|
Warning (adjustable)
|
50
|
Lower limit of inlet and outlet valve pressure
|
Trip (delayed for 3 seconds)
|
4Main functional components and systems
(1) Main circuit pure water power pump set and automatic switching of 2 pumps
The main circuit pure water power pump group is composed of two stainless steel vertical multi-stage pumps and a three-way automatic directional valve. The two pumps work and backup each other. When the working pump fails, the monitoring system immediately commands the backup pump to be put into operation, and the faulty pump synchronously exits. The three-way automatic directional valve automatically switches, completing the automatic switching program of the two pumps and valves.
The heart component of the cooling system in the pure water power pump system is imported from an internationally renowned brand.
(2) Heat exchanger components
Adopting a stainless steel corrugated flat plate design, it has a high heat transfer coefficient and can effectively reduce the overall volume of the machine; Its structure and waveform adopt internationally innovative advanced models.
(3) Ionic exchange components
Made of stainless steel material, it is equipped with imported maintenance free long-lasting ion exchange resin. The service life of the exchange resin after one filling is about 1-3 years depending on the supplementary water source.
(4) Nitrogen filled buffer water tank
Made of stainless steel material, it consists of a box body, liquid level indicators, sensors, intake and exhaust solenoid valves, pressure instruments, valves, etc.
(5) Automatic water replenishment component
Composed of stainless steel water replenishment tank, replenishment pump, replenishment ion exchanger, direct reading flowmeter, etc. The water inlet method can be to inject primary pure water into the water replenishment tank or directly introduce tap water into the water replenishment pipe.
(6) Filter components
Stainless steel folding filters are installed in the pure water outlet pipe section and the auxiliary water inlet pipe section, with filter element apertures of 100 μ m and 300 μ m, respectively; Due to the filtering area being several tens of times the diameter of the pipeline, it can be used continuously for a long time.
Both the water replenishment inlet pipeline and the ion exchanger outlet pipeline are equipped with 10 μ m precision filters.
(7) Automatic exhaust system
The air existing in the pipeline and generated during operation not only deteriorates water quality, but also increases fluid resistance and even poses a risk of blockage. This machine is equipped with an air-water separator and an automatic exhaust valve to form a complete online automatic exhaust system.
(8) Anti condensation system
When the temperature of the cooling pure water entering the valve is lower than the dew point temperature of the valve chamber (which may occur when the valve is shut down while the cooling system is still operating), the valve components may exhibit a "condensation" hazard; For this purpose, the machine is equipped with anti condensation protection: the PLC receives signals from the valve room temperature and humidity sensor. When the temperature of the cooled pure water is close to the dew point of the valve chamber, the "anti condensation" program is activated: the electric proportional valve is fully opened (S-S), the electric heater is started, and it stops when the temperature of the pure water is far away from the dew point.
(9) Fluid parameter analog sensor
The parameters of each part of the pure water cooling circuit of this machine, including temperature, humidity, pressure, flow rate, conductivity, water level, etc., all use 4-20mA analog output sensors to form a complete cooling fluid simulation parameter transmission system.
(10) Pipeline system
The pipeline system of this machine is composed of stainless steel pipes, pipeline components, manual valves, automatic valves, etc.
(11) Electrical control cabinet
Local monitoring components: PLC， Functional modules, LCD touch screens, electromechanical control components, slot boards, wires, etc. are combined with the cabinet to form an electrical control cabinet; The LCD touch screen is installed separately on the panel, providing a human-machine interface.
5Valve internal water distribution pipeline
The water distribution pipe inside the valve is composed of a collection pipe, radiator, water-cooled resistor, quick water pipe joint, equipotential electrode, automatic exhaust valve, branch hose and valve, etc; All pipe fittings are connected in a closed loop.
(1) Water collection pipe
It is composed of straight pipes, joint sockets, pipeline components, etc., and its materials are usually PP series (PPH, PPR) and PVDF.
PP material is mainly used in water cooling valve channels such as SVC, frequency conversion, and inverter; The usage parameters are: temperature -30 ℃~80 ℃, pressure ≥ 1MPa, and usage time of 20 years. Using hot melt cutting and pasting processing, it is widely used due to its low cost.
PVDF material is mainly used in high-end power electronic equipment water-cooled valves such as high-power high-voltage direct current transmission converter valves. The operating parameters are: temperature -50 ℃~120 ℃, pressure ≥ 1.5MPa, and service life of 30 years; Using hot melt cutting and pasting processing. PVDF material is of high quality but expensive, and is currently only used in high-end products.
(2) Radiator
The water-cooled radiator used with high-end water-cooled thyristor valves often adopts integral aluminum die-casting and stainless steel coil core type.
Our company has obtained the national patent "ZL · 9" for the development of this product, which is formulated according to the specifications of thyristors. Currently, there are 5 types ranging from 2 inches to 5 inches, and its thermal resistance is around 0.01 ℃/W.
The water-cooled radiator used for thyristor modules (IGBT, SKIIP) adopts a large flat water-cooled substrate radiator. Our company's "Plate Fin Core Type Large Flat Module Heat Sink" has obtained the national patent "ZL · 7". Due to the use of plate fin inner cavity to enhance thermal conductivity, the thermal resistance can reach below 0.002 ℃/W; There is no limit to the size of the cooling table, and the side length can be from 20 to 120cm as needed; material
(3) Water-cooled resistor
As a damping equalizing resistor connected in series with thyristors in high-pressure valve circuits, the hydraulic characteristic parameters such as heat generation, water flow rate, and corresponding water resistance at rated power are provided by professional manufacturers.
(4) Quick water pipe joint
A convenient hose connector consists of four parts: a connector seat, a throat clamp, a fastening cap, and an O-ring seal; There are currently three specifications: M10 × 1 (with DN4 hose), 3/8 "(with DN6 hose), and M12 × 1.25 (with DN8 hose); The materials are divided into two types: nylon (PA-66) and PVDF.
(5) Branch hose
The water connection hose between the valve manifold and the cooling element (radiator, water-cooled resistor) has three commonly used inner diameters (DN) of 4, 6, and 8, and is made of PE, nylon, or PVDF materials.
(6) Equipotential electrode
Equipotential electrodes are installed on the manifold, and wires connect the potential generated by the water flow in this section of the waterway to the equipotential terminals of the valve. Made of stainless steel material.
(7) Automatic exhaust valve
Install an automatic exhaust valve at the high end of the water pipeline in each valve group to discharge the free and accumulated air in the pipeline online. The automatic exhaust valve used in the valve water distribution pipeline adopts internationally renowned brands such as Owentrop, Amszhuang, etc.
(8) Valve
Each phase valve component is equipped with a valve at the inlet and outlet of the manifold, made of engineering plastic or stainless steel.
VIValve external water distribution pipeline
The cooling pure water connection channel between the pure water cooling device outside the valve and the water distribution pipeline inside the valve is composed of pipes, pipeline components, and valves; Its material is made of two types: stainless steel and hard engineering plastic. Due to the better performance and relatively low price of PPR pipes in engineering plastics, they have mostly replaced stainless steel as the preferred material for valve external water distribution pipelines.
7External cooling circulation section
For users with industrial cooling water pipe networks, the external cooling cycle only needs to introduce one inlet and outlet pipe to connect with the pipe network; Relatively simple; If this condition is not met, an independent external water cooling circulation circuit needs to be set up.
There are various design methods for the external water cooling circulation loop of a self-contained system, but the fiberglass cooling tower circulation loop should be preferred for relative efficiency and standardization. Professional design institutes have standardized designs, and users can purchase equipment for construction on their own or entrust our company to supply and construct complete sets.
1. Working process of external cooling circulation loop for fiberglass cooling tower
After being pressurized by a water pump, the cooling water in the cooling pool enters the pure water cooling device heat exchanger through an external water pipeline. In the heat exchanger, it absorbs the heat transferred by pure water (main water) through the partition heat transfer method. The warmed up cooling water enters the top of the fiberglass cooling tower through the external water pipeline and sprays down. The sprayed water evaporates and absorbs heat in large quantities under the action of headwinds and hydrophilic fillers, and then cools down. The cooled cooling water flows into the cooling pool and is re pressurized and output by the external cold water pump. This cycle is repeated to form an external water cooling circulation loop.
The cooling water reduced by evaporation is replenished to the cooling tower or cooling water tank through the replenishment pipeline, and the amount of replenishment is equal to the evaporation rate of the cooling tower (kg/h). To avoid paying Ca in water2＋、 Mg2＋Ions precipitate (scale) on the surface of the heat exchanger due to temperature, which reduces the heat transfer efficiency. For high hardness supplementary water, it should be softened before entering the water tank.
2. Main configuration of external cooling circulation circuit
a. Fiberglass cooling tower: medium temperature type, flow rate ≥ main circulating water flow rate (t/h).
b. Water pump group: dual pump configuration, working and standby for each other; The supporting components include: three-way automatic directional valve, pressure regulating valve, check valve, pipeline, temperature and pressure instruments, and machine base. The water pump and pipeline are made of stainless steel material.
c. Electric control cabinet: circuit for starting, stopping, and automatic switching of the water pump, automatic water replenishment circuit, alarm circuit for water level drop, water pressure, and water temperature abnormalities in the pool, and information transmission circuit.
d. Water softener: Sodium ion exchanger, available in both automatic and manual modes. The former is more expensive and should be selected according to actual conditions and local conditions.
e. Cooling pool: generally located at the lower part of the cooling tower, with a volume ranging from several cubic meters to tens of cubic meters depending on the capacity of the cooling tower, and is made of concrete poured and solidified. The supporting components include water level signal, water level indicator pipe, and inlet, outlet, water replenishment, and sewage pipe openings. Cooling towers with small capacity (30t/h) and below may not require a cooling water tank to reduce investment. Instead, a collection type cooling tower can be used to directly inlet and outlet water from the lower water basin.
f. External cold water pipeline: made of galvanized pipes and galvanized pipe fittings, generally laid in trenches; In northern regions, it should be applied below the permafrost line.
8Parameter Table of Intelligent Water Water Cooling Device
|
Model specifications
|
cooling capacity
（KW）
|
Pure water flow rate
（t/h）
|
Whole machine power
（KW）
|
Reference size
L×B×H
|
Operating weight (kg)
|
|
LSS-10Z
|
10
|
2
|
0.75
|
1×0.6×1.2
|
300
|
|
LSS-20Z
|
20
|
3
|
1.1
|
1×0.6×1.2
|
400
|
|
LSS-40Z
|
40
|
5
|
1.5
|
1.2×0.8×1.5
|
600
|
|
LSS-60Z
|
60
|
7
|
2.2
|
1.2×0.8×1.5
|
800
|
|
LSS-80Z
|
80
|
10
|
3.0
|
1.6×1.2×1.7
|
1000
|
|
LSS-100Z
|
100
|
12
|
3.0
|
1.8×1.2×1.7
|
1100
|
|
LSS-120Z
|
120
|
15
|
4.0
|
1.8×1.3×1.7
|
1200
|
|
LSS-150Z
|
150
|
18
|
4.0
|
1.8×1.3×1.7
|
1400
|
|
LSS-200Z
|
200
|
22
|
5.5
|
1.8×1.3×1.7
|
1600
|
|
LSS-250Z
|
250
|
28
|
5.5
|
1.85×1.35×1.7
|
1800
|
|
LSS-300Z
|
300
|
32
|
7.5
|
1.85×1.35×1.8
|
2000
|
|
LSS-350Z
|
350
|
38
|
7.5
|
1.9×1.4×1.8
|
2100
|
|
LSS-400Z
|
400
|
43
|
11.0
|
1.9×1.4×1.8
|
2200
|
