Dry-wet Combined Cooling Tower
Dry-wet combined cooling tower
Dry-wet combined cooling tower is an application form of tubular indirect evaporative cooler. Its working principle is divided into three parts:
(1) Primary side heat exchange cycle: When the hot water on the primary side flows through the coil of the closed cooling tower, it is divided into four stages for heat transfer:
a. The heat I of the hot solution is transferred to the inner surface of the coil by convection heat transfer;
b. Heat conduction through the tube wall to the outer surface of the coil;
c. Heat is transferred from the outer surface of the coil to the water film flowing outside the tube, and the water film is transferred to the air by evaporation and convection heat exchange
2) Secondary side pre-cooling cycle: The tertiary side spray water is pumped from the lower water pan of the cooling tower to the water distribution system by the spray pump. After the radiating head is sprayed on the heat-dissipating material, it exchanges latent heat and sensible heat with the air, and after pre-cooling, it flows to the coil group, forming a stable water film on the outer wall of the pipe, absorbing the heat transmitted by the medium in the pipe, and then recirculating it again. Go back to the water tray, and so on.
(3) Air circulation: the fan draws the unsaturated air outside the cooling tower into the tower, and the airflow passes through the coil, the heat sink and the spray water on the secondary side to exchange latent heat and sensible heat to absorb heat, and then pass through the water blocker. The gas and water are separated, and the nearly saturated moist air is discharged out of the tower.
Through the above three cycles and four-stage heat exchange, the cooling tower cools the secondary heat carrier solution to the required temperature to return it to the system to maintain its normal operation.
Details
The dry and wet combined cooling tower is equipped with two operating modes of wet and dry cooling in summer and dry cooling in winter.
The heated medium first enters the finned tube, and this part of the heat is mainly cooled by the cold air from the fan and the finned tube. After dry cooling, the fluid continues to flow to the bottom of the wet cooling coil. The spray pump evenly sprays the spray water from the top of the wet cooling pipe to the coils, and the residual heat conducted by the heat flow in the coil to the wet cooling pipe is carried away by the falling spray water, and flows in reverse with the dry cold air imported from the bottom of the tower, forming saturated steam in the process, and then discharged by the top fan.
When the ambient temperature is low, the spray pump stops working and mainly relies on the fin tube of the air cooler for heat transfer.
Advantages:
Combined with the advantages of dry cooling system and wet system, can automatically adjust the operation mode according to the working conditions, energy saving, environmental protection, time and labor saving.
Applications:
1. Water shortage arid areas, reduce water resources consumption, but also reduce branch costs;
2. abundant power area: due to dry operation, the required air volume is large, the fan motor power is relatively large, and the power consumption is more suitable for wind power, hydro-power, tidal, and nuclear power areas.
Structure and Main Parts
* Outer Shell
The casing of the cooling tower is made by galvanized aluminum zinc casing. Which is more better than normal galvanized steel. Automatic punching and flange, assembling without welding. strengthen support use hotdip galvanizing steel, do the best mechanical strength, which is the most stable structure of cooling tower. The cracks between boards use butyl rubber belt, waterproof to ensure no leakage.
* Cooling Coils （choose depend on the different working conditions, different environmental conditions and different investment philosophy.）
- 304 Stainless coil Pressure design 0.8-1Mpa, corrosion-resistant ability.(√）
- 304SS+ aluminum fins
* PVC separator
The separation and fixation of the surface cooler are carved from high quality PVC board, which is firm and not easy to corrode. Reduce the sloshing and friction during the operation of the equipment, so that the heat exchanger heat dissipation is more stable.
* Fan - Low noise large diameter fan
Low speed fully sealed motor adopts blades with super width. The fan is composed of aluminum blades and steel wheel hub, featuring low wind resistance, high rate of air flow, low noise, high efficiency and reliable performance and so on.
* Spraying Pump
Special circulating spraying pump, long life span. Adopt special out door motor, with special imported bearing to ensure the pump reliable operation. And has following advantages: small horse power, large flow volume, low noises and etc. high performances.
* Water spray system
The high-efficiency water spray system provides important guarantee for the cooling capacity. water distribution of the spray water is even, and the spray nozzles are easy to clean and replace.
* PVC water dehydrater
Efficient recovery of evaporated water vapor, reduce water loss
* Air-inlet windows
Air inlet window prevent water splashing.
Optional: steel folding shutter type or PVC honeycomb type,
* Circulation pumps
One standby pump is used, and the standby pump can be automatically put into operation when the fault occurs. High efficiency, low noise, low vibration.
Optional: vertical/horizontal
* Control panel
- Intelligent Control System
PLC intelligent control, local/remote control, can be adjusted according to different working conditions.
Certifications
Why Choose Us
(1)We have complete service of cooling tower equipment
(2)We can provide the perfect water treatment solutions and cooling system
(3)We provide OEM/OEM service
(4)Can you see the running machine in our factory?
Yes. Before making your decision ,you can test-run the equipment in our factory
(5)How long of the warranty time?
Our warranty period is 1 year.
(6)We have a strong after-sales team and technical solutions, we can provide you with a full range of solution applications.
About Us
Wuxi Master Cooling Machinery Manufacturing Co., Ltd. is a professional manufacturer of water cooling towers and related equipments including cooling tower, chiller, evaporative condenser, water treatment and other accessory parts. Our factory is located in Wuxi national industrial park, and our office center is located in downtown Financial Street. We have convenient transportation and elegant environment with modern industrial plant, advanced technology and equipments.
Master Cooling products are widely used in electric power, chemical industrial, metallurgy, cooling, light industrial, civil facilities and other fields.We have an excellent scientific research and development team whom onstantly design new products always more efficient and more innovative in order to meet the different needs from different customers. We also have excellent after-sales service team.
Our core competencies are the reasonable price with superior quality and also our products own high efficiency, environmental protection, easy installation, operation and maintenance , long service life and what matters most is that we pay more attention to customer’s feelings.
| Technical Parameters of Combined-flow Closed type(double side into wind) | ||||||||||||
| Model | Cooling Capacity(K cal/h) | Flow Rate （m³/h） | Spray Pump | Fan | Pipe Size | Dimension | Weight(approx) | |||||
| Power (kw) | Flow rate （m³/h） | Qty. | (kw) Power | Inlet/outlet | Supply | Sewage | L*W*H（mm） | （kg） Net weight | Operation weight （kg） | |||
| MSTFBD-175 | 875000 | 175 | 2.2 | 60 | 2 | 11 | DN80*2 | DN40 | DN40 | 5700*3000*4660 | 3900 | 9500 |
| MSTFBD-200 | 1000000 | 200 | 2.2 | 114 | 2 | 11 | DN100*2 | DN40 | DN40 | 6400*3200*4660 | 4300 | 10200 |
| MSTFBD-250 | 1250000 | 250 | 3.7 | 140 | 2 | 15 | DN125*2 | DN40 | DN40 | 6800*3200*4950 | 4900 | 12500 |
| MSTFBD-300 | 1500000 | 300 | 3.7 | 140 | 2 | 15 | DN150*2 | DN40 | DN40 | 7300*3300*4950 | 5100 | 13620 |
| MSTFBD-350 | 1750000 | 350 | 5.5 | 160 | 2 | 22 | DN200*2 | DN40 | DN40 | 7900*3400*5450 | 5620 | 14080 |
| MSTFBD-400 | 2000000 | 400 | 5.5 | 160 | 2 | 37 | DN200*2 | DN40 | DN40 | 8400*3600*5450 | 6100 | 15300 |