EISELE at the Biogas Convention & Trade Fair 2023 in hall 09, stand D68

EISELE launches new GTWSL and GTWSL-E large-propeller submersible mixers for biogas plants

Sigmaringen (Germany), 7 December 2023 – EISELE, a leading manufacturer of pumps and mixers for the agricultural and biogas sectors, has developed a new energy-efficient series of units based on its proven GTWSB submersible mixers. These will be presented for the first time in December at the Biogas Convention & Trade Fair 2023 in Nuremberg, Germany. The slow-rotating large-propeller GTWSL and GTWSL-E devices offer maximum savings potential when mixing the substrate at speeds of up to 113 rpm. The GTWSL series has an asynchronous motor that starts up slowly via a soft starter. In contrast, the GTWSL-E has a synchronous energy-saving motor in energy efficiency class IE5, which operates with a frequency converter. This efficiency class is currently unique worldwide for biogas agitators. The frequency converter enables stepless speed control of the GTWSL-E for optimal adaptation to different operating conditions. Unlike asynchronous motors, the IE5 energy-saving motor in the GTWSL-E achieves over 95% efficiency even at low speeds, and currently offers the highest savings potential on the market. Most economical mixer in the world Increased environmental awareness, rising energy costs and the trend towards sustainability mean that saving energy has become more important in recent years. The new GTWSL series guarantees a high circulation rate with low drive power, and enables very high efficiency even at low speeds. The IE5 energy-saving motor, combined with large propeller diameters, slow speeds and low drive power, makes the GTWSL-E the most economical mixer in the world to date. As a result, biogas facility operators, plant constructors and service companies in Germany can receive a 50% grant from the German Federal Office for Economic Affairs and Export Control (BAFA) for investments in construction projects using this submersible mixer. Also suitable for thermophilic biogas plants The unit has two variants – each of which is also available in an IE5 version. Variant 1 has a drive power of 11 kW and a propeller diameter of 1340 mm. Variant 2 delivers 15 kW of drive power with a propeller diameter of 1430 mm. The propeller, the slide with nozzle, and installation parts are made of stainless steel (V2A) as standard. Mechanical seals in the housing are located on both the motor and medium sides. The insulation class according to IEC 34-1 (insulation class H) allows high temperatures of up to 180 °C in the motor insulation. Robust build quality and in-house motor production guarantee the long service life typical of Eisele products. Compared to asynchronous motors, the energy-saving IE5 motor generates around 40% less heat. The weight and solid design of the unit enable low-vibration running characteristics while ensuring effective heat dissipation. The new GTWSL mixers can be used at immersion depths of up to 40 m. They are approved for substrate temperatures up to 65 °C, making them suitable for thermophilic plant operation. Numerous accessory components provide a wide range of installation and application options. Germans benefit from attractive BAFA changes In Germany, recent changes mean that under module 1 of the BAFA support programme, investments by biogas enterprises with fewer than 50 employees (SMEs) will now receive grants of 50% – i.e. 10% more than before. For businesses with less than 250 employees, the subsidy remains at 40%, as previously. For all electricity-generating undertakings, aid is granted under the so-called de minimis rule for the “eligible investment costs”. When applying for module 1, the only requirement for receiving a grant is an IE5 manufacturer’s certificate. The application procedure can be handled by Eisele or the sales partners if desired.

About EISELE Driven by decades of expertise, the family-run business Franz Eisele u. Söhne GmbH & Co. KG in Sigmaringen, Germany, has offered innovative machinery and services in the agriculture and biogas sectors for over 130 years. As a reliable partner with a large vertical range of manufacture, EISELE develops and produces robust and durable agitators and pumps “Made in Germany”. Conformity to the highest quality standards is assured in the company’s own test centre. EISELE also produces its own electric motors that meet the requirements of the highest energy efficiency classes, and with more than 25,000 own items provides very good spare parts support. The well-established premium manufacturer has a close-knit sales network with trading partners and representatives all over the world, and is continuing to expand its international sales activities. EISELE currently sells its products in more than 60 countries. For more information, visit www.eisele.de.