Closed Circuit System 22MW+ Free Cooler With EC Fan
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.
Features
- Our range of Dry Air Coolers and Radiators are designed for
commercial and industrial fluid cooling applications.
- We offer a wide range of options to provide the most cost-effective
solution for your cooling requirement.
- Standard arrangements include flat-bed vertical or horizontal
airflow with V configurations to offer the smallest footprint.
- Whether your application is cooling water / glycol for water cooled
chillers, injection moulding machines, furnace equipment, CHP
Engine Cooling or any other process. One or more of our units can
be selected to provide the most cost-effective solution to suit
your space and noise requirement.
- Energy saving free cooling is possible for much of the year for
many applications.
| Material options | Heavy-gauge hot-dip galvanized steel is used for unit steel panels
and structural elements featuring a zinc aluminium coating. |
| Heat transfer media: | A. The dry cooler is constructed of staggered and seamless copper
tubes (15,9 or 12,7 diameter) with aluminium, rippled and
corrugated fins (0,14 or 0,17 thickness). |
| B. 2.5 mm fin spacing for optimal air turbulence |
| C. Thick and seamless copper headers and threaded steel connections |
| D. Pressure tested at 30 bar |
| E. Try our options for aggressive environments: special pre-coated
anti-corrosion aluminium fins or copper fins (0,2 mm thickness). |
| Air movement system: | A. Axial fan with exceptionally compact direct drive short
integrated motor and fan guard. |
| B. The fan features an impeller and motor and is balanced as a
complete unit using dynamic single plane balancing. Balance grade
is G6.3. |
| C. Fan and motor totally maintenance free. |
| D. Bearings seals and motor encapsulation for long service life. |
Technical Paraments
Flat series — Double rows fans
| H*FD*91 | Fan Dim
mm | * | H*FD491 | H*FD691 | H*FD89 | H*FD1091 | H*FD1291 | H*FD1491 | H*FD1691 | H*FD1891 |
| Rated Capacities (kW) Heat Exchange Surface (㎡) |
| Fluid Coolers | 910 | D | 237kW-1632kW 454㎡-4903㎡ (Water/Ta25℃/Tin40℃/Tout35℃) |
| Freon Condensers | 910 | F | 285kW-1632kW 454㎡-4903㎡ (R404A/Ta35℃/Tk50℃) |
| Ammonia Condensers | 910 | A | 151kW-1709kW 263㎡-5696㎡ (NH3/Ta35℃/Tk50℃) |
| Gas Coolers | 910 | G | 156kW-1929kW 358㎡-3859㎡ ( CO2/Tair32℃/Tin113℃/P94Bar/Tout34℃) |
| Oil Coolers | 910 | O | 174kW-2212kW 454㎡-4903㎡ (OIL ISO VG 46/Ta35℃/Tin85℃/Tout60℃) |
| Fan Model | 910 | EC | W3G910KU2503 (2.55kW) or FN091-ZIQ.GL.V5P1 (3.2kW) |
| 910 | AC | W6D910GB0101 (2.02kW) or FN091-SDS.6N.V7P2 (1.85kW) |
| No of Fans | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| Overall Dimensions | 910 | Lenth-1 | 3480 | 4980 | 6480 | 7980 | 9480 | 10980 | 12480 | 13980 |
| Lenth-2 | 4080 | 5880 | 7680 | 9480 | 11280 | 13080 | 14880 | 16680 |
| Width | 2265 |
| Height | 1740 (Including 800Leg) |
Options
| Coil design refrigerant: water, oil, glycol | Multiple circuits |
| Sub-cooling circuits | Stainless steel or aluminum casing |
| Coated aluminum or copper fins | Explosion proof motor |
| Customized fin spacing | EC Fan |
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 |
 |  |
