Energy-saving SECOTEC refrigeration dryers, 45 - 98 m³/min

Significant space-savings reduce planning and installation costs. Stable pressure dew point performance combined with material-friendly, energy-saving operation thanks to optimal system cooling.

Innovation:

• According to load, the frequency-controlled radial fan draws off the accumulated exhaust heat from the refrigeration dryer via the cooling air flow.
• The radial fan is sufficiently powerful to allow standard exhaust air ducting to be connected directly to the refrigeration dryer.
• The high efficiency dimensioning of the radial fan is also reflected in the low power consumption performance of SECOTEC TG refrigeration dryers.
• Thermal overload - caused by hot exhaust air being drawn back in as cooling air - is safely avoided.
• Compared to conventional ventilation systems using air hoods and auxiliary fans: No unnecessary removal of air from the room. This minimises exhaust air flow which means smaller diameter ducting can be used. There is no longer any need for an auxiliary fan. 
• Independent exhaust air control and high residual thrust allow direct connection to the compressor collector ducts.  

The use of small volumes of the future-proof R-513A refrigerant provides security of supply for maintenance work throughout the entire life of the refrigeration dryer.

Innovation:

• The use of greenhouse gases is becoming ever more strictly regulated throughout the world. Installation of highly compact heat exchangers - such as SECOPACK LS and microchannel condensers - considerably reduces refrigerant demand.
• The greenhouse gas potential of R-513A is significantly lower compared to the refrigerants that have commonly been used in refrigeration dryers up until now.
• R-513A is equivalent to R-134a. It is neither toxic nor flammable.

1. Compressed air inlet
2. Condensate outlet
3. Refrigerant inlet (cold)
4. Refrigerant outlet (warm)
5. Heat transfer
6. Compressed air outlet

Material-friendly operation, stable pressure dew point and high energy-efficiency in all load phases.

Optimisation:

• The SECOTEC TG series combines the SECOPACK LS heat exchanger system with latent thermal storage and up to three refrigerant compressors arranged in parallel. These are switched continuously, according to the load level. 
• This relieves the load on the thermal mass, allowing it to be made even more compact.
• The high-performance thermal mass allows efficient, infinitely variable adjustment to cooling performance during partial load operation.
• Material-friendly operation thanks to the limited switching frequency of the refrigerant compressors.
• The standard SIGMA CONTROL SMART controller determines the actual electrical power consumption.

Minimal costs for maintenance, inspection and documentation.

Innovation:

• Unlike typical axial fans, radial fans are designed to last for the unit’s entire service life.
• The condensate separator in the SECOPACK LS operates without the use of filter elements. It is just a matter of replacing the service unit in the standard ECO-DRAIN condensate drain.  
• No other parts are required when it comes to maintenance.
• R-513A refrigerant: Low fill volumes and low greenhouse gas potential allow cost-effective compliance with national operator regulations. So with the SECOTEC TG, there is no need to perform leak tests or to provide the accompanying time-consuming documentation required by the European F-gas regulations (EU 517/2014). However, it is still recommended to have the unit inspected once per year by a certified expert.

SECOTEC refrigeration dryers efficiently maintain pressure dew points of up to +3°C during full load operation. Thanks to their narrow fluctuation range, pressure dew points are also more stable during partial load operation than is the case with conventional refrigeration dryers. 

Conventional refrigeration dryers with switching operating modes, but without an additional thermal mass, use the heat exchanger material itself as a thermal mass. In these dryers it is therefore necessary to switch the refrigerant compressors and fan motors on and off much more frequently, in order to maintain the required cooling performance. 

To reduce switching frequency and wear, the refrigerant circuit therefore only switches on at much higher pressure dew points. The resulting fluctuations in the pressure dew point negatively affect drying performance. This can be risky, since corrosion can take hold even with relative compressed air humidity of 40 % – corrosion can therefore occur even without condensate formation. 

SECOTEC refrigeration dryers, on the other hand, ensure long-life operation thanks to their high thermal mass storage capacity. Once the thermal mass has been charged, the refrigerant compressor and fan motor can remain switched off for much longer without impacting pressure dew point stability.

Efficient thermal storage control up to 98 m³/min on a footprint of just 1.7 m². This allows a space-saving installation and a high degree of flexibility when it comes to planning.

Innovation:

• The SECOTEC TG’s small size is made possible by the compact thermal mass storage concept.
• The SECOTEC TG measures just 1025 x 1620 x 2130 mm.
• The rear side can be placed right against the wall (clearance of 200 mm required).