Rotors for high temperature applications
Content
- Rotors for hight temperature applications
- Function principle
- Housing types
- Storage mass
- Drive motor
- Cleaning chamber
- Sealing
- Cleaning devices
- Application area
- Economics
Rotors for hight temperature applications
- Type EM up to 300°C (572°F), housing up to Ø 3500 mm (138 ins)
- Type EH up to 650°C (1200°F), housing up to Ø 2650 mm (104 ins)
Function principle
The rotor which is constructed like a honeycomb, rotates non-stop between the stream of hot exhaust air and the cold intake air.
The rotor is warmed up in the stream of exhaust air and transfers the heat to the stream of incoming cold air.
Up to 75% of the heat contained in the exhaust air can be recovered in this way.
Housing types
Robust, welded construction, double walled with thermal insulation. The housing can be constructed with flange fittings to ease connecting with the frame and ductwork.
Housing can be supplied in steel or stainless steel in all available types. The flange connection framework and the floor pans are fitted with over-sized “run-off” drains to ensure drainage of any cleaning fluids or condensation. A bypass can be fitted in the housing to ensure an efficient power control.
Storage mass
Corrugated rotor mass with integrated, welded spoke construction made from stainless steel. Through a large cross section and an ever changing airflow direction through the rotor a self cleaning effect can be obtained.
Corrugation heights:
- 2,1 mm (0.08 in) for cases with a medium level of exhaust air pollution
- 3,1 mm (0.12 in) for cases with a high level of exhaust air pollution
Materials:
- Stainless Steel – supply of all regular types is possible
If required the rotor mass can be supplied in a segmented version to ease installation and commissioning.
Drive motor
The motor operates with a cylindrical gearbox and chain driven over the axle mounted sprocket. The motor is externally mounted. The rotor can be operated with either a constant or variable rotation speed.
Cleaning chamber
The rotors can be delivered complete with cleaning section which drastically reduces the transfer of exhaust gases into the supply air stream. For the cleaning section to operate fully there must be a pressure difference between the supply air and extract air. The scavenging air volume is in this version less than by standard rotors because, in most cases, the rotor speeds are lower.
In certain cases the the pressure difference that the cleaning section needs cannot be guaranteed. In this case a fan can be installed to to reduce the transfer of exhaust gases into the drawn in supply air.
Sealing
Standard are four gasket types:
- Elastic felt gasket >150°C (300°F)
- Flat gasket >300°C (570°F)
- Silicate fibre gasket >650°C (1200°F)
- By temperatures of up to 450°C (840°F) a friction gasket can be fitted composed of graphite fiber ribbon.
In case of leakage between exhaust and supply air due to unwanted pressure ratios , an air tight chamber gasket could be advantageous.
Cleaning devices
There are two solutions available for automatic cleaning:- In case of low air pollution the implementation of compressed air will be sufficient.
- In cases of higher degrees of pollution the rotor can be cleaned with a combination of compressed air and high pressure water or steam.
Cleaning nozzles are driven over an electromechanical device externally mounted.
The regulation is obtained through a cleaning control system. By low cleaning requirements , a static device can be installed without any moving parts. In many cases the cleaning process can be executed during normal operation.
Application area
For example :
- Thermal afterburners
- Exhaust utilisation for heat power stations
- Exhaust utilisation for belt dryers:
- Sludge drying
- Coating industry
- Textile industry
- Film industry
- Exhaust utilisation for spray or blow dryers:
- Washing powder production
- PVC manufacture
Economics
Through high temperature inclinations , high efficiencies and in most cases high operational times the amortization period of these components lies between 3 and 6 months.
Through the high energy recoveries it is possible , in many cases , to reduce the connecting power requirements for the related equipment thus enabling by new installations a reduction of the total investment.
Example of a medium installation:
- Air Volume: 20.000 m3 / h (11770 cfm)
- Exhaust Temp: 200°C (390°F)
- Heat Recovery: 900 KW
- Yearly operational duration: 8.000 Hours
- Average ambient temperature: 10°C (50°F)
- Yearly reduction in heating: 7.200 MWh
- Heating cost: 20 € / MWh
- Yearly heating cost reduction: 144.000 €
- Subtraction for yearly operational costs: 2.000 €
- Yearly CO2-Saving ca. 3.000 Tonnes
Electrolux History
Electrolux Heater was founded by Mr.Dimche Palenzo Electrolux in Mr.Teodor Palenzo Electrolux (yunior). This was the year that Electrolux Heater started developing producing hot-air heaters and fans for the horticulture sector in particular, and later also the agricultural sector. Global partner in heating solutions Kalorifer Tajfun of Electrolux.Your expert partner in horticulture climate solutions Kalorifer Tajfun of Electrolux operates all over world
Below you will find a few examples of projects that KALORIFER TAJFUN® of Electrolux GROUP has successfully completed worldwide. Would you like to have more information about our projects, or to see more of our projects? Please feel free to contact us. There’s more to heating greenhouse complexes than just hanging up heaters. KALORIFER TAJFUN® of Electrolux GROUP guarantees the quality of the whole installation and leaves simple box-shifting to others. An optimal greenhouse climate is the ultimate aim and your heating installation is an essential part of this. Numerous factors play a role in a good heating plan. KALORIFER TAJFUN® of Electrolux GROUP can offer you optimum advice about the heating options in your commercial greenhouse thanks to its many years’ experience and expertise.
Heat your greenhouse optimally? Our experts will be happy to help you.Your goal is our starting point. We will help you draft a heating plan based on your objectives. Your information is the starting point for further development by our specialists.The project details are assessed by KALORIFER TAJFUN® of Electrolux GROUP and the heating plan starts to take shape. Cost-efficiency and an optimum climate in the greenhouse are central to this. When all the starting points are known, this is developed into a detailed plan that matches your wishes and requirements. This plan is of course discussed with you in detail.A next logical step is a clear offer. The last piece of your jigsaw puzzle to be able to make a definitive choice. Quality is the top priority for KALORIFER TAJFUN® of Electrolux GROUP. As a manufacturer, we work very closely with reputable installers. An installer of your choice will start working out a definitive heating plan with you at an early stage. They will help fulfil your ambitions together with KALORIFER TAJFUN® of Electrolux GROUP.
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