Model HDS Series - Hybrid Drying System
From Regenerative Dryers
The Pioneer HDS Series (Future-Aire) combines the advantages of a refrigerant dryer and a heatless regenerative dryer. A PIONEER Refrigerant dryer is used to lower the pressure dewpoint of compressed air down to 40°F/4.4°C, and a PIONEER Heatless Regenerative Dryer is used to lower the PDP to -40°F/-40°C to -100°F/-73.3°C.
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The moisture content of saturated air at 100 PSIG ...
The moisture content of saturated air at 100 PSIG is:
0.603 oz/100 SCFM at 100°F/37.8°C PDP
0.077 oz/100 SCFM at 40°F/4.4°C PDP
The moisture content of the air at 40°F/ 4.4°C PDP is less than 13% of the moisture content of air at 100°F/37.8°C PDP. Future-Aire takes advantage of this. Because the refrigerated dryer removes 87% of the moisture, the purge air requirement of the regenerative dryer is only a fraction. The hybrid system reduces the purge air requirement even lower by heating the purge air to about 150°F/65.6°C using the normally wasted condenser heat.
The net purge air requirement is:
For -40°F/-40°C – 2-3%
For -100°F/-73.3°C – 3-4%
Lowest Overall Cost
To operate a 1000 SCFM heatless dryer, 4000 hours/year, based on $0.30/1000 SCF the purge cost is $10,080/year. To operate a 1000 SCFM Future-Aire system under similar conditions, the purge cost is $2,016/year. Based on $0.70/KWH and 5.0 KW power usage, the power cost for its refrigeration system is $1,400/year. Total operating cost for the Future-Aire system is $3,416/year.
Cost savings are $10,808 – $3,416 = $6,664 per year. Cost savings generally make Future- Aire the lowest overall cost dryer.
- · Quality Features
- · Specifications
- · Lowest overall cost
- · Cold coalescer with automatic drain and particulate afterfilter with manual drain are standard
- · Accepts inlet temperature to 190°F/87.8°C with minimum increase in purge loss
- · Reduces required compressor capacity
- · Minimum purge loss
- · Diagnostic control panel
- · NEMA 4 electrical
- · Reliability of two full-size dryers
- · No dewpoint spikes of a heat-type
- · More consistent dewpoint
- · Longer desiccant life due to minimum moisture loading
- · Longer valve life due to moderate temperatures
- · The purge air heat exchanger acts as a secondary condenser to lower the refrigerant head pressure, lowering energy usage and increasing compressor life by helping it run cooler.
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