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Corrosion-proof reactors cut downtime in harsh acidic environments.

  • Energy Efficient
  • Large Flow

Energy Saving
& Efficiency

Leading Carbon Materials Giant Installs 6 EPV-670WH Water-Cooled VSD Dryers, Saving Over ¥180,000 Annually in Electricity Costs

A leading carbon-based materials giant has deployed six EPV-670WH water-cooled VSD refrigerated air dryers for its 250kW two-stage water-cooled PM VSD compressor system.

The dryers ensure stable compressed air for producing silicon-carbon anodes and high-performance carbon fibers.

  • 67% Energy Saving

    With six EPV-670WH dryers, the system saves 67% energy

  • 20%+ Efficiency

    It can significantly save energy and provide high-purity compressed air.

Stable Dew Point for High-Quality Carbon Materials

The carbon-based new materials industry has extremely high requirements for compressed air quality. In the silicon-carbon anode chemical vapor deposition (CVD) process, even trace amounts of moisture can trigger silane hydrolysis, producing silica impurities that directly reduce the electrode's specific capacity and cycle performance.

During the oxidation process of carbon fiber preforms, fluctuations in the compressed air dew point can lead to a reduction in fiber strength of more than 15%. EPSEA VSD refrigerated dryers can precisely control the dew point at 7°C and the evaporation temperature at 4°C, keeping the inlet air humidity within the process threshold range. This ensures product quality stability from the air source stage.

Table 1: Relationship between Compressor Frequency, Inlet Temperature, and Flow Rate at 7bar g

Flow Rate

Temp

 15 20 25 30 35 40 45 50 55 60 67
m³/min
25 ℃ 30Hz 30Hz 30Hz 30Hz 30Hz 30Hz 30Hz 30Hz 30Hz 34Hz 40Hz
30 30Hz 30Hz 30Hz 30Hz 30Hz 30Hz 31Hz 35Hz 38Hz 44Hz 50Hz
35 30Hz 30Hz 30Hz 30Hz 31Hz 35Hz 39Hz 44Hz 48Hz 54Hz 60Hz
40 30Hz 30Hz 30Hz 33Hz 38Hz 44Hz 49Hz 55Hz 60Hz 66Hz 75Hz
45 30Hz 30Hz 35Hz 43Hz 50Hz 57Hz 64Hz 71Hz 78Hz 85Hz 90Hz
50 30Hz 33Hz 41Hz 49Hz 57Hz 65Hz 74Hz 82Hz 90Hz / /

High Efficiency
& Energy Saving

Variable Speed Drive (VSD) Technology Delivers Significant Energy Savings in Refrigerated Air Dryers: 67% Power Reduction per Unit and 183,984 CNY Annual Savings for Six Units

VSD technology saves 30,664 kWh per EPV-670WH dryer annually (8,000 hours) versus fixed-speed models. At 1 CNY/kWh, six units save 183,984 CNY/year. By adjusting frequency from 90Hz to 30Hz as inlet temperature drops from 55°C to 25°C or flow from 55 m³/min to 15 m³/min, VSD matches cooling load dynamically.

During low-load seasons, power drops from 9.1kW to 3.0kW—a 67% reduction. Replacing shell-tube fixed-speed units with better pre-cooling can add another 50%+ savings.

Table 2: Comparison between Power Frequency Refrigerated Air Dryers and VSD Refrigerated Air Dryers
Month Operation Time Flow Rate Inlet Temp Power Frequency VSD
Frequency Power Cumulative electricity consumption Frequency Power Cumulative electricity consumption
25 h m³/min °C Hz kW kWh Hz kW kWh
1 720 40 30 50 9.1 6552 30 3.0 2184
2 470 30 35 50 9.1 4277 30 3.0 1426
3 700 30 40 50 9.1 6370 33 3.3 2336
4 680 45 40 50 9.1 6188 49 5.0 3369
5 700 45 45 50 9.1 6370 64 6.5 4530
6 680 40 50 50 9.1 6188 65 6.6 4469
7 700 45 55 50 9.1 6370 90 9.1 6370
8 720 50 50 50 9.1 6552 90 9.1 6552
9 680 40 45 50 9.1 6188 57 5.8 3919
10 520 35 40 50 9.1 4732 38 3.8 1998
11 710 45 35 50 9.1 6461 39 3.9 2800
12 720 40 30 50 9.1 6552 30 3.0 2184
Total 8000 / 72800 / 42136
Saving kWh 30664 Saving Ratio 42.1%

EPSEA VSD Refrigerated Air Dryer:
High Efficiency, Low Carbon, Reliable Performance

EPSEA VSD refrigerated air dryers combine high energy efficiency, stable performance, and eco-friendly operation. They use low-GWP refrigerants R513A and R410A to support low-carbon goals without compromising cooling performance.

An enhanced pre-cooling system with countercurrent heat exchange and larger cooling surface reduces temperature difference, cutting evaporative cooling demand and system load. Real-time load monitoring adjusts frequency across a wide range (30–90Hz, up to 120Hz), keeping the compressor at optimal levels for actual heat loads.

An enlarged air passage lowers internal resistance and pressure drop, improving gas-liquid separation and preventing blockages. The non-destructive drainage system features a large-diameter, zero-loss drain with high displacement and clog resistance, reducing air waste.

Together, these features deliver significant energy savings and high-purity compressed air, while the use of eco-friendly refrigerants supports green manufacturing—meeting stringent air quality requirements and low-carbon development targets.

  • 30–120Hz

    Frequency Range

  • R513A, R410A

    Refrigerants

  • 0%

    Drainage Loss

VSD REFRIGERATED AIR DRYER

  • GEN 6 Super Cold Refrigerated Air Dryers
    • PDP: 2-10°C
    • 0.6-1.0 MPa
    • 7.5-75HP
    High-performance compressed air dryer with extreme speed pre-cooling, high-efficiency evaporation and dual-stage water separation, delivering low pressure loss and a stable dew point.
    View Details
  • GEN 6 Super Cold Refrigerated Air Dryers
    • PDP: 2-10°C
    • 0.6-1.0 MPa
    • 7.5-75HP
    High-performance compressed air dryer with extreme speed pre-cooling, high-efficiency evaporation and dual-stage water separation, delivering low pressure loss and a stable dew point.
    View Details
  • GEN 6 Super Cold Refrigerated Air Dryers
    • PDP: 2-10°C
    • 0.6-1.0 MPa
    • 7.5-75HP
    High-performance compressed air dryer with extreme speed pre-cooling, high-efficiency evaporation and dual-stage water separation, delivering low pressure loss and a stable dew point.
    View Details
  • GEN 6 Super Cold Refrigerated Air Dryers
    • PDP: 2-10°C
    • 0.6-1.0 MPa
    • 7.5-75HP
    High-performance compressed air dryer with extreme speed pre-cooling, high-efficiency evaporation and dual-stage water separation, delivering low pressure loss and a stable dew point.
    View Details
  • GEN 6 Super Cold Refrigerated Air Dryers
    • PDP: 2-10°C
    • 0.6-1.0 MPa
    • 7.5-75HP
    High-performance compressed air dryer with extreme speed pre-cooling, high-efficiency evaporation and dual-stage water separation, delivering low pressure loss and a stable dew point.
    View Details
  • GEN 6 Super Cold Refrigerated Air Dryers
    • PDP: 2-10°C
    • 0.6-1.0 MPa
    • 7.5-75HP
    High-performance compressed air dryer with extreme speed pre-cooling, high-efficiency evaporation and dual-stage water separation, delivering low pressure loss and a stable dew point.
    View Details
  • GEN 6 Super Cold Featured Image
  • GEN 6 Super Cold Featured Image
  • GEN 6 Super Cold Featured Image
  • GEN 6 Super Cold Featured Image
  • GEN 6 Super Cold Featured Image
  • GEN 6 Super Cold Featured Image

Frequently Asked Questions

Harum trium sententiarum nulli prorsus assentior. Nec enim illa prima vera est, ut, quem ad modum in se quisque sit, sic in amicum sit animatus.

Which industries are EPSEA refrigerated air dryers suitable for?

EPSEA refrigerated air dryers are engineered to perform reliably across a wide spectrum of industrial environments. They are particularly well-suited to the following sectors:

  • General Manufacturing — production lines requiring stable, moisture-free compressed air
  • Automotive — paint booths, pneumatic tooling and precision assembly
  • Electronics — sensitive component manufacturing with stringent moisture control
  • Food & Beverage — hygiene-critical processing and packaging applications
  • Laser Cutting — protect optics and improve cut quality with dry assist air
  • General Industrial Applications including textiles, printing, and metalworking
What is the full range of EPSEA compressed air treatment products?

EPSEA refrigerated air dryers are engineered to perform reliably across a wide spectrum of industrial environments. They are particularly well-suited to the following sectors:

  • General Manufacturing — production lines requiring stable, moisture-free compressed air
  • Automotive — paint booths, pneumatic tooling and precision assembly
  • Electronics — sensitive component manufacturing with stringent moisture control
  • Food & Beverage — hygiene-critical processing and packaging applications
  • Laser Cutting — protect optics and improve cut quality with dry assist air
  • General Industrial Applications including textiles, printing, and metalworking
What are the key advantages of the GEN6 series vs standard refrigerated air dryers?

EPSEA refrigerated air dryers are engineered to perform reliably across a wide spectrum of industrial environments. They are particularly well-suited to the following sectors:

  • General Manufacturing — production lines requiring stable, moisture-free compressed air
  • Automotive — paint booths, pneumatic tooling and precision assembly
  • Electronics — sensitive component manufacturing with stringent moisture control
  • Food & Beverage — hygiene-critical processing and packaging applications
  • Laser Cutting — protect optics and improve cut quality with dry assist air
  • General Industrial Applications including textiles, printing, and metalworking

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