Environmental and energy management systems create a framework for preserving resources. Therefore, an extensive environmental management system was introduced in the power stations of the EWE subsidiary swb in 1998 and relevant key figures such as CO2 emissions are regularly documented in reports.
We pay particularly close attention to reducing our internal energy consumption. We will identify and realise potential energy reductions throughout the Group. By 2020, we want to have certified 12 selected companies under ISO 50001 for energy management systems – including the holding company EWE AG and subsidiaries with high energy consumption levels. As of 2015, eight companies have already been certified.
Save energy systematically
The EWE company swb Services and our Turkish grid operator Bursagaz were certified under ISO 50001 in 2011, followed by the Group subsidiaries EWE GASSPEICHER and EWE VERTRIEB in 2013 and 2014 respectively. The companies EWE ERNEUERBARE ENERGIEN, swb CREA, swb Erzeugung und Entsorgung, and wesernetz (Bremen and Bremerhaven) were then certified in 2015. In the next few years, we intend to have our largest company, EWE NETZ, certified in addition to others.
Energy monitoring still in expansion phase
One requirement for being able to manage energy is knowing exactly how much is used and how trends develop. EWE is developing its Group-wide energy monitoring system, which aims to provide reliable information on internal energy consumption. In 2015, the focus was on the validation of existing data and setting up new measuring points. The next step was to integrate additional companies with particularly high energy requirements into the system.
EWE has been recording the consumption of its administrative offices for years. In 2015, its administrative offices and data centres used 290.7 terajoules (80.8 million kWh), 55% of which in the form of electricity and 45% for heating.
The first successes of energy management
Some measures were successfully implemented in 2015. For example, the energy consumption of the data centre in Oldenburg, which has the highest consumption, was cut by 20%. In 2016, the efficiency of the cooling systems in the same data centre, as well as a further site in Oldenburg, was enhanced. We expect to see energy savings of around 15%.
As a result an improvement measure, EWE expects to see its natural gas consumption halve from around 65 million kWh to 32 million kWh when operating the natural gas storage.
There are also potential savings to be made in our offices. Some conventional light bulbs have been replaced with energy-saving LED bulbs. A new printing policy developed in 2015 is expected to save energy and cut annual paper consumption by 20%.
Holistic fleet standards
In 2015, the energy consumption of the EWE fleet remained roughly the same as the previous year at 121.7 terajoules (33.8 million kWh). In total, the fleet comprised 2,257 vehicles on the cut-off date of 31 December 2015. Around 130 cars were replaced by efficient gas-powered vehicles in 2015. This decreased the annual energy consumption per vehicle from 16.4 megawatt-hours (MWh) to 15 MWh.
The expansion of a Group-wide fleet management strategy progressed well in 2015. Throughout the Group, vehicles are procured and managed according to consistent standards. A common fuel-card system was also introduced. This enables us to simplify processes within the Group, draw on purchasing advantages, and evaluate fuel consumption across the Group as a whole.