Free Cooling Screw Chiller

Products

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Free Cooling Screw Chiller

    A free cooling chiller is a type of cooling system that utilizes ambient air temperature to provide cooling without the need for mechanical refrigeration.
    It works by drawing in cool outdoor air and using it to lower the temperature of the cooling medium, such as water or glycol, which is then circulated through the building or process equipment to remove heat.

     The key feature of a free cooling chiller is its ability to take advantage of the natural cooling capacity of the environment, reducing or eliminating the need for traditional mechanical cooling methods. This results in significant energy savings and lower operating costs.
    Free cooling chillers are commonly used in applications such as data centers, industrial processes, and commercial buildings with a year-round cooling load.



 Key Features of VENTTK Free Cooling Screw Chiller

1. Cooling capacity from 260~550kW, providing efficient cooling for various cooling loads.

2. Hanbell Screw compressor, ensuring efficient operation and long-lasting performance.

3.  Free cooling function can start at 0℃ or 5℃, when the outside temperature is within this range, the chiller can use the cool outdoor air to supplement or replace mechanical refrigeration, significantly reducing energy consumption.


Part List

No.

Name

Brand

Feature

1

Compressor

Hanbell

Semi enclosed screw type, efficient and reliable

2

Shell and tube heat exchanger

Saft

Efficient shell and tube heat exchanger (dry/falling film)
Uniform liquid separation and good oil return

Yinggu

3

Fin Heat Exchanger

Shenglin

Internally threaded copper tube, hydrophilic aluminum foil, high efficiency, and less prone to scaling

4

Electronic expansion valve

Sanhua

High precision, precise control, long lifespan, rapid adjustment, and sharp response

5

Pressure sensor

Sensata

Stable performance

Sanhua

6

Axial fan

Xingxin

Compact structure, low noise, high efficiency

Kemao

7

Safety valve

Castel

Stable quality, safe and reliable

8

Electric three-way valve

Johnson Controls

Low resistance and reliable action

9

Water pump
Optional

CNP

High efficiency and stable quality

10

Dry filter

Sanhua

High dryness, replaceable filter element

Dun An

11

Flow switch

Anchao

Stable quality and long lifecycle

Kaobo

12

Controller

Punp

Stable performance and reliable quality

Syslab

13

Contactor

Schneider

Stable performance and reliable quality

Siemens

14

Thermal relay

Schneider

Stable performance and reliable quality

Siemens

15

Circuit breaker

Schneider

Stable performance and reliable quality

Siemens

Technical Data
Model LSBLGFC***BGS 260 280 300 320 340 390 430 460 550
Nominal
Cooling
Condition
Cooling Capacity kW 257 276 302 322 339 389 432 464 543
USRT 73 79 86 92 97 111 123 132 155
kBtu/h 875 942 1031 1099 1158 1328 1474 1584 1853
Cooling Input Power kW 86 97 103 106 114 128 143 154 181
IDC Working
Condition
Cooling Capacity kW 257 276 302 322 339 389 432 464 543
Free Cooling
5℃
Ambient Temperature 5℃
Cooling Capacity kW 180 193 212 226 238 273 302 325 380
Input Power kW 19.8 24.2 24.2 24.2 28.2 35.2 39.6 39.6 44.0
Free Cooling
0℃
Ambient Temperature 0℃
Cooling Capacity kW 277 298 327 348 367 421 467 502 587
Input Power kW 19.8 24.2 24.2 24.2 28.2 35.2 39.6 39.6 44.0
Power Supply   3N~/ 380V/ 50Hz
Maximum Input Power kW 125 140 150 154 165 186 208 223 262
Maximum Input Current A 216 243 259 266 285 322 360 387 454
Compressor Model Semi Enclosed Screw Compressor
Quantity Unit 1
Start Mode Y-△
Energy Regulation 25%-100%
No. of Refrigerant Circulation Circuits 1 1 1 1 1 1 1 1 1
Evaporator Type Shell and Tube Heat Exchanger
Water Flow Rate m3/h 52.9 57.0 62.4 66.5 70.1 80.4 89.2 95.9 112.2

IDC Water Side
Pressure Drop

kPa 160 160 160 160 160 160 160 160 160
Connecting Pipe
Diameter
DN 100 100 100 125 125 125 125 125 150
Fan Type  Axial Fan
Quantity  4 6 6 6 6 6 8 8 10
Total Air Volume m3/h 97480 104920 114920 122480 129000 148000 164200 176480 206480
Fan Total Power kW 8.8 13.2 13.2 13.2 13.2 13.2 17.6 17.6 22.0
Refrigerant Type R134a
Charge kg 83 89 97 104 109 125 139 150 175
Water Pump Input Power kW 11.0 11.0 11.0 11.0 15.0 22.0 22.0 22.0 22.0
External Head m 23 23 25 23 23 27 26 25 24
Net Dimension L mm 2762 4108 4108 4108 4108 4108 5524 5524 6870
W mm 2260 2260 2260 2260 2260 2260 2260 2260 2260
H mm 2540 2540 2540 2540 2540 2540 2540 2540 2540
Net Weight kg 2800 3200 3600 3800 4050 4200 5100 5673 7073
Running Weight kg 2940 3360 3780 3990 4253 4410 5355 5956 7426




Notes:
1. The designed secondary refrigerant is 45% ethylene glycol, which meets the minimum environmental temperature of -30 ℃ for antifreeze requirements. If there are other operating parameters required, please contact us.
2. Nominal cooling condition: ambient temperature is 35℃,secondary refrigerant inlet/outlet temperature is 12/7℃.
   IDC cooling condition: secondary refrigerant inlet/outlet temperature is 15/10℃.
   Free cooling: secondary refrigerant inlet/outlet temperature is 15/10℃.
3. The maximum working pressure on the water side of the chiller is 1.0MPa, and the fouling coefficient is 0.018 m2 ℃/kW.
4. Applicable ambient temperature range:-30~46℃;
5. If there are changes due to improving product performance, please refer to the parameters on the nameplate of the chiller.