The refrigeration dryer is one of the common post-processing equipment for compressors and is also a machine often used in many production processes. But did you know that there are actually many shortcomings in cold dryers? This article will take you through the shortcomings of cold dryers to help you choose a better cold dryer.
Key Takeaways
- Strict requirements on ambient temperature
- Insufficient energy operating efficiency
- Quality varies from good to bad
- Strict requirements on ambient temperature
The refrigeration dryer has strict requirements on the ambient temperature during operation. If the temperature is too high or too low, it will not be able to operate at full operating efficiency. This is because the drying principle of the refrigerated air dryer is to condense the moisture in the compressed air through refrigeration, so the evaporation temperature of the refrigerant is not allowed to be lower than 2°C, otherwise it will freeze and block the pipeline, making the compressed air unable to pass. As the ambient temperature increases, the dew point of the air supply to the dryer will raise significantly.
- Insufficient energy operating efficiency
The important function of the refrigerated air dryer is to lower the compressed air dew point. Although the air supply volume of the refrigerated air dryer can theoretically reach 100%, due to the restriction of the working principle, the air supply dew point of the refrigerated air dryer is the lowest. It can only reach about 3℃ (dew point). If you want to get a lower dew point, it is necessary to raise the power of the refrigerant compressor, which also greatly increases the production cost.
- Quality varies from good to bad
In the current market, although the popularity of freeze dryers is high, most brands are processed and manufactured by small “processing workshops” without an established high-end brand to guide them. This is the result of irregular market requirements.
- Large pollution to the environment
The main refrigerant of the refrigeration dryer is Freon, and the gas produced will destroy the atmosphere and cause great pollution to the environment.
- Technology configuration
- Strike Cost
- Import and ship assistance
Selection and Sizing Considerations
Select filtration and drying to match the ISO 8573 purity class of your use case. Mount drains and inspect them; trapped condensate reintroduces moisture and oil into the air stream. Pre-filters safeguard the dryer, while high-precision after-filters polish the air before use.
Frequently Asked Questions
What is the difference between a pre-filter and an after-filter?
A pre-filter sits before the dryer and removes bulk moisture and coarse particles; an after-filter sits after the dryer and polishes remaining fine impurities.
How do I choose a refrigerated versus an adsorption dryer?
Refrigerated dryers are economical down to about +3°C dew point. Desiccant dryers are needed for lower dew points or critical, oil-free applications.
What root causes high dew point in a refrigerated air dryer?
Overloading, high inlet temperature, a faulty condenser, or a blocked drain can all raise the dew point.
Get a Quote for Your Application
Tell us your required pressure, air flow, and application, and the Panrui team will recommend the right compressor with a detailed quotation. Contact us or browse the product range to learn more.