Two technologies for different requirements
Refrigerated drying is mainly used where a positive dew point is acceptable. Adsorption technology can achieve significantly sub-zero values when designed for them. The required drying follows from the process and the lowest pipework temperature; the industry alone does not determine the technology.
Rated capacity is not universal
The catalogue flow applies to specified inlet and ambient temperatures, pressure and outlet dew point. Different conditions must be assessed using data for the particular series. A model cannot be reliably selected without correction factors. Include regeneration consumption for adsorption dryers, and pressure losses and servicing for both types.
What to check in practice
- Specify the maximum flow and worst-case temperature conditions.
- Specify the outlet dew point at the stated pressure.
- Follow the specified prefiltration, water drainage and any dust filtration required downstream of the dryer.
Example scenario
The indoor pipework stays above +15 °C, but an outdoor branch may reach −10 °C. A design suitable for the indoor network may not suit the outdoor branch. Options include drying the whole supply or separately treating the sensitive consumer; selecting a specific model requires operating data.
| Principle | What happens to the water | What to include in costs |
|---|---|---|
| Refrigerated | It is cooled and separated as liquid | Electricity, pressure drop, servicing |
| Adsorption | It is captured on the adsorbent and removed during regeneration | Regeneration air, heat or electricity depending on the type, servicing |
What to watch out for
- Selecting a dryer solely from the m³/min figure in its name.
- Forgetting regeneration consumption and the resulting delivery requirement.
- Assuming all adsorption dryers have the same dew point and costs.
Will the calculator select a specific model?
Not without documented performance and correction tables. Our tool prepares the operating specification for selection. It does not treat a general estimate as the guaranteed capacity of a particular dryer.