Closed Circuit System Hybrid Dry Cooler With Spray Water System

Closed Circuit System Hybrid Dry Cooler With Spray Water System

What is closed-loop dry cooling system?

The strength of a closed-loop dry cooling system is that the unit is very simple and relatively easy to install. The energy requirements are relatively low and it is easily controlled. Maintenance is normally low requiring only periodic inspection, lubrication, and testing of the fluid. The weakness of a closed-loop dry cooling system is that it is dependent on the atmospheric dry bulb. For example, if your location’s design dry bulb is 100 F in the summer and your equipment requires 90 F coolant; at best the system can only supply around 105 to 110 F coolant to the load. In this case you would need supplemental cooling to get the coolant temperatures down to 90 F. The closed-loop dry cooling system also requires free clear air to work efficiently. This means that the fluid cooler must be placed in a location that is not affected by the prevailing winds, not too close to a building that will allow the warm exhaust air from the fluid cooler to be recirculated back to the fluid cooler, and finally not in a location that has heavy concentrations of dust, dirt, leaves, seeds, etc. Many times the best location for the fluid cooler is on the roof. Since the fluid cooler is located outside the coolant must also have a concentration of some type of glycol to prevent freezing if your location has a design dry bulb in the winter that dips below freezing. If the location is very cold, the concentration of glycol may need to be significant to prevent freezing. Glycol concentrations as they increase begin to reduce the rate of heat transfer. For example, if you need 50% ethylene glycol concentration with water the heat exchanger equipment and the flow/pressure of the coolant will need to increase to adjust for the glycol concentration. Larger fluid coolers and pumps will increase the cost of the system over those with lesser concentrations of Glycol/water. This cannot be prevented in colder climates.

Dry fluid cooler features:

Air discharge direction
Performance ranges	Cooling capacity: from 5 to 649 kw Air volume: from 2828 to 263503 m3/h Sound pressure level: from 31 to 69 dB A(10m) Dry coolers:customized on demand
High efficiency heat exchanger	Capacity designs for maximizing the heat transfer relative to the energy consumption of the fan. Tube and tube coupling design for low pressure drop in the coil on the media sides(maximum 100KPa at water designing condition). Our thermodynamic and aerodynamic designing software is long year tested and proved in Germany
Fan	Only choose low specific energy consumption fans. Fan nozzle designs for maximum air flow and air throw. Our fans from the world`s leading manufacturer are practically proved to be reliable in operation and long lasting. Motor: protection class IP 54 and insulation class F. Voltage:400V/3N/50Hz Air separator for each fan.
Testing	Heat exchangers are supplied clean and tested at a pressure of 30 bars
Options	Coil design refrigerant: water, oil, glycol. Multiple circuits. Sub-cooling circuits. Stainless steel or aluminum casing. Coated aluminum or copper fins. Explosion ploof motor. Customized fin spacing.

Dry Cooler Technical Paraments

Dry cooler D3 series parameter(fin space 2.1mm)

Options

Reference:

For data center cooling	Country: Mongolia Application: match with precision air conditioner Cooling capacity: 17.6kW Cooling medium: 34% ethylene glycol Supply power: 400V/3P/50Hz Fan brand: Ziehl-Abegg	Country: Russia Application:data center cooling Cooling capacity: 763kW Cooling medium: water Supply power: 380V/3P/50Hz Fan brand: Ziehl-Abegg
For power plant	Country: Hongkong Application: power plant Cooling capacity: 363kW Cooling medium: water Supply power: 415V/3P/50Hz Fan brand: Chinese brand	Country: Russia Application: power plant. Cooling capacity: 180kW Cooling medium: water Supply power: 380V/3P/50Hz Fan brand: Chinese brand