Energy monitoring at the Implenia’s Mannheim depot

Implenia operates a total of around 30 sizeable depots, primarily to maintain and repair its construction machinery. In an energy monitoring pilot project at its Mannheim site, engineers started by examining energy consumption before going on to uncover areas where energy could be saved. Initial measures are cutting energy costs significantly.

The Mannheim site is in the Friesenheimer Insel industrial zone north of the city. There are several workshops, warehouses and office buildings on the premises which are around the size of six football pitches. In line with their duties, the various departments consume quite a lot of energy. Clarity in terms of possible energy-saving opportunities has now led to a detailed examination of energy consumption.

Small steps to success

Tetrag Automation took care of the measurements. The Implenia subsidiary is marketing its own energy monitoring solution “e3m”, which is perfectly suited to high-resolution analyses and consumption data. In January 2018, Tetrag engineers installed new electricity meters and data recorders at the Mannheim site. Even after just a short period of time, it was clear that the 
greatest potential for optimisation exists during downtimes – at night and weekends. “We have passed on these findings to our employees and told them to make a conscious effort to switch off the relevant devices”, says Kai Frühbrodt, head of the Mannheim depot. This instruction has been well received from the very start, he says, and has largely been implemented too. This change in behaviour means that the depot can save EUR 5,000 per year just from switching off devices not in use.

Good for the environment and the pocket

Thanks to this monitoring, the Tetrag experts identified a further raft of further energy-saving measures such as the use of modern lighting and heating technology. “We have also already invested in a new controller for our compressed air system”, explains site head Kai Frühbrodt. Thanks to the new controller, the plant uses a quarter less electricity, and electricity costs can be reduced by a further EUR 6,000 per year. This means that the investments in energy monitoring will have paid for themselves after just two years. The project shows how Tetrag’s solution can marry financial and environmental benefits exceptionally well in the area of sustainability. Implenia intends to continue in this vein.