FEATURE DRIVES, CONTROLS & TRANSMISSIONS
ROLLER DRIVE SYSTEM reduces energy consumption
Savings can be made in highly automated logistics operations where materials handling, storage and order picking are often responsible for around 25% of the energy costs
on is 30 km from goods receipt to goods issue. The drives clearly play an important role because they affect the energy consumption in conveying products. In the field of modern logistics the areas
of materials handling, storage and order picking are often responsible for approximately 50% of the energy costs of plants with a high degree of automation. Heating, ventilation and lighting account for more than two thirds of the other 50% and lighting for around 15%. This means internal logistics offers significant energetic optimisation potential. Hermes Fulfilment started to think about the responsible use of energy early on. This pertains not only to the use of economical motors and controls but includes measures such as the use of back fed braking energy in the high bay warehouse, the construction of a combined heat and power plant in Haldensleben and the use of energy - efficient lighting systems.
H
ermes Fulfilment, an Otto Group company that manages all services
along the supply chain for European distance dealers at its four logistics centres, introduced a master plan on climate protection in 2006. As part of this energy -saving program the company is replacing its conventional 400 volt technology with energy- saving 24 volt drive technology from Interroll. Initial measurements have shown energy savings of about 25% thanks to the Interroll drive technology. “We installed this technology in order to save energy,” explains head of the technical services department Michael Schekatz. “At the same time we noticed in trials how quiet it is. This is a success we never really expected and are quite pleased about. Furthermore, we have found that maintenance has become much easier.”
The technical service department is upgrading the logistics centre step by step during operation but only four hours per day are available to do this. Thanks to how easy it is to configure and wire the Interroll ConveyorControl system it can be installed and put into operation very
18 JULY/AUGUST 2015 | FACTORY EQUIPMENT
quickly. The control family allows for it to be used completely without an SPS or be completely controlled by an SPS by using the GatewayControl.
POTENTIAL ENERGY SAVINGS A system driven by RollerDrive always has a decentralised structure. The drives are installed in all of the individual conveyor zones. This means they can be switched on or off separately. Movement throughout the entire conveyor takes place only when goods are actually transported with zero pressure. Only those RollerDrives that are needed to transport the goods to be conveyed are actually driven. This offers enormous potential for energy savings and noise and wear reduction. The logistics centre with its approximately 54 hectares of surface area is the biggest and most modern site that Hermes Fulfilment operates; 170 million articles are moved here per year and up to 300,000 shipments leave the centre each day. Approximately 1.2 million cartons are stored in two high bay warehouses. The length of the conveyor line that all products here are transported
Initial measurements have shown that 24 volt drive technology offers energy savings of approximately 25% at Hermes Fulfilment
DETAILED COST BENEFIT ANALYSIS A detailed cost benefit analysis is developed for each project and includes not only the initial investment but ongoing operating costs. Many years of experience and many hundreds of thousands of RollerDrive in use make Interroll a leading manufacturer of 24 volt drive technology. End users worldwide have so far modernised multiple plants with this technology that offers a fast return on investment (ROI). The results of a scientific study conducted by the Institute for Material Handling and Logistics (IFL) at the Karlsruhe Institute of Technology (KIT) headed by Prof. Dr. Ing. Kai Furmans confirmed in many application examples the advantages that 24 volt drive technology offers compared to conventional 400 volt drive technology. Interroll offers both the complete KIT study 24 Volt Drive Technology in Continuous Conveyor Systems and a short version for downloading on its website.
Interroll T: +41 91 850 25 25
www.interroll.com Enter 311
/ FACTORYEQUIPMENT
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