Variable Frequency Chiller
The variable frequency chiller unit is remarkable for its enhanced variable frequency driver compressor. This design has resulted in a decrease of up to 60% in the starting current, when contrasted with the traditional form of unit equipment drive. Frequency conversion control not only applies to the compressor, but also to fans, pumps and more. Stepless load adjustment for up to 1Hz at a time is enabled through the frequency converter, with a range extending from 30 to 130Hz. Moreover, the usage of adaptive control logic ensures that the output water temperature is accurately managed within a variance of ±0.3°C, consistently meeting the requirements of high-precision temperature control.
Frequency conversion is a great way to enhance the performance and extend the longevity of equipment. By altering the power supply frequency, the load can be adjusted and total energy usage reduced. This process of adjusting the frequency of the fixed 50Hz power grid to 30-130 Hz is managed automatically by the frequency converter resulting in improved motor speed.
The variable frequency chiller unit is designed to directly adjust the compressor speed during partial load operations, resulting in energy savings that surpass conventional units which do not have the capability to change motor speed. Operating at partial load for over 95% of the time makes these energy-saving effects consistent and the investment cost recoverable in a short period.
Additionally, an on-board frequency conversion drive technology drives the frequency conversion unit, in collaboration with a specialized compressor; this causes partial load energy efficiency to drastically improve, allowing for a intergrated part-load value (IPLV) to be approximated over 10.
Refrigerant: R134a
Power supply: 380V-3N-50Hz
| Model | Nominal cooling capacity | Power input | Capacity control % | Refrigerant charge kg | Condenser | Evaporator | Noise level dB(A) | Shipping weight kg | Operating weight kg | |||||||
| kW | USRT | kW | Pipe diameter (inlet/outlet) in | Water flow m3/h | Design water pressure MPa | Water pressure drop kPa | Pipe diameter (inlet/outlet) in | Water flow m3/h | Design water pressure MPa | Water pressure drop kPa | ||||||
| 2088 | 594 | 340 | Stepless frequency control | 700 | 8″ | 418 | 1 | 74 | 8″ | 359 | 1 | 74 | 82 | 12000 | 12500 | |
| 2320 | 660 | 385 | 800 | 10″ | 465 | 1 | 74 | 10″ | 399 | 1 | 74 | 84 | 13000 | 13500 | ||
| 2785 | 792 | 448 | 950 | 10″ | 556 | 1 | 76 | 10″ | 479 | 1 | 76 | 85 | 14000 | 14500 | ||
| 3200 | 910 | 525 | 1100 | 12″ | 641 | 1 | 78 | 12″ | 550 | 1 | 78 | 86 | 15000 | 15500 | ||
| 3550 | 1009 | 582 | 1200 | 12″ | 711 | 1 | 80 | 12″ | 610 | 1 | 80 | 87 | 16000 | 16500 | ||
| 4175 | 1187 | 672 | 1400 | 12″ | 834 | 1 | 82 | 12″ | 718 | 1 | 82 | 88 | 18000 | 18500 | ||
Notes:
- 1. Rated cooling capacity standard: evaporator water inlet/outlet temperature 12℃ /7℃, condenser water inlet/outlet temperature 30℃ /35℃, fouling factor 0.088 ㎡•℃ /kW, compressor operating frequency 50Hz;
- 2. Chiller water temperature range: 5~20℃;
- 3. Cooling water temperature range: 15~40℃;
- 4. Operating frequency range 30~50 Hz;
