Energy-saving and cost-cutting
ECO fuel extraction system - robust and reliable
Thanks to a low drive output of just 0.18 kW (0.30 – 0.38 kW for 70 – 330 kW boilers) and a robust, high-efficiency spur gear, the fuel extraction system saves a huge amount of energy and therefore lowers electricity costs. You can save as much as 67% in electricity costs compared to those for conventional fuel extraction systems. With the excellent gear efficiency of over 90%, it clearly outperforms conventional worm gears. The new modular design ensures that the auger, along with its trough and removable cover, is easy to use.
ECO fuel extraction system
Cross section & specifics
![Detailbeschreibung im Querschnitt einer Eco-Raumaustragung | Hargassner](https://www.hargassner.com/wp-content/uploads/2022/08/eco-raumaustragung-schnittbild-hargassner.png)
1 – Bicameral rotary valve in Z-form
2 – Ball coupling
3 – Breaker box
4 – FE system extensions (modular design)
5 – Special spring blade layout
6 – Effective wood chip inlet bracket
7 – Extraction auger and shaft
8 – No-load disc
9 – Eco fuel extraction gear unit (spur gear)
10 – Stainless steel stoker auger (and pipe) with STM temperature monitoring
11 – Drive motor for the stoker auger and rotary valve
12 – Drive motor for the extraction auger and agitator
13 – Safety cover with a reverse function
14 – Floor agitator with spring blades
![Schneckengetriebe - Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/schneckengetriebe-hargassner.jpg)
Worm gear
- friction loss
- low efficiency
![Stirnradgetriebe - Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/stirnradgetriebe-hargassner.jpg)
Spur gear
- low friction loss
- high efficiency
![Zellradschleuse-Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/zellradschleuse-hargassner-768x768.jpg)
Bicameral rotary valve in Z-form
- Chamber depth 18 cm / 22 cm
- 100% burn-back protection guaranteed
- For long pieces of wood
- Easy to replace
- Saves a lot of effort
- Has hardened cutting edges
![Eco-RA-Modulbauweise - Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/eco-ra-modulbauweise-hargassner-768x768.jpg)
Modular design
- Planning flexibility
- Auger extensions of 300 – 2000 mm
- Easy to transport and install
- Quicker and cheaper to maintain
- Individual auger parts can be replaced
![Stirnradgetriebe frei - Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/stirnradgetriebe-frei-hargassner-768x768.jpg)
Eco fuel extraction gear unit
- Maximum efficiency
- Energy-saving and highly efficient
- Durable
![Leerlaufscheibe mit Federn für Hargassner Raumaustragung 4,5 und 5 Meter](https://www.hargassner.com/wp-content/uploads/2022/03/leerlaufscheibe-eco-raumaustragung-768x768.png)
Hargassner no-load disc
- Effort required halved
- Disc remains still until the spring blades are retracted under the disc
- No hollow spaces created
- For extraction systems with Ø 4.5 m & 5 m
![Querschnittbild Schacht-Schnecke für Hackgut bei Hargassner Eco-Raumaustragung](https://www.hargassner.com/wp-content/uploads/2022/03/hackgut-schacht-schnecke-eco-raumaustragung-768x768.png)
New auger and shaft
- Generously dimensioned
- 3 shaft sizes
140 mm / 180 mm / 260 mm - Optimized for boiler type
- No fuel jams
- Suitable for wood chips/pellets
![Querschnittbild vom Hackgut-Abstreifwinkel zum optimalen Materialtransport | Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/hackschnitzel-abstreifwinkel-eco-raumaustragung-768x768.png)
Wood chip inlet bracket
- Optimum fuel supply
- Ideal amount of fuel in the auger shaft
- Max. fuel storage room emptying
- Less effort required and less wear and tear
![Raumaustragung-Hackgut Eco-RA 400 mit 3 Federarmen Draufsicht | Hargassner](https://www.hargassner.com/wp-content/uploads/2022/03/raumaustragung-eco-ra-400-3-federarm-draufsicht-hargassner-768x768.png)
3-blade system
- Special spring blade layout upt to Ø 4 m
- Power-saving gear ratio 1:16
- Shaft 140 mm = Eco-HK 50–120
- Shaft 180 mm = Eco-HK 150–330
![Raumaustragung-Hackgut Eco-RA 450 mit 4 Federarmen Draufsicht | Hargassner](https://www.hargassner.com/wp-content/uploads/2022/08/raumaustragung-eco-ra-450-4-federarm-draufsicht-hargassner-768x768.png)
4-blade system
- Special spring blade layout up to Ø 4,5 – 5 m
- Hargassner no load disc
- Power-saving gear ratio 1:25
- Shaft 140 mm = Eco-HK 50–120
- Shaft 180 mm = Eco-HK 150–330
![Raumaustragung-Hackgut Eco-RA 550 mit 3 Knickfederarmen Draufsicht | Hargassner](https://www.hargassner.com/wp-content/uploads/2022/08/raumaustragung-eco-ra-550-3-knickfederarm-draufsicht-hargassner-768x768.png)
3-blade hinged arms
- Ø of 5.5 & 6 m
- Power-saving gear ratio 1:25
Matching Hargassner spring blade systems to possible wood chip heating models and shaft sizes
Spring Blade Layout | FE-Type | Eco-HK 50–120 | Eco-HK 150–330 |
---|---|---|---|
Fuel Extraction System 3-blade system Shaft 140 / 180 |
200 , 250 , 350 , 300 , 400 |
✓ / – | – / ✓ |
Fuel Extraction System 4-blade system & no-load disc Shaft 140 / 180 |
450 , 500 | ✓ / – | – / ✓ |
Fuel Extraction System 3-blade hinged arms Shaft 140 / 180 |
550 , 600 | ✓ / – | – / ✓ |