Energy Machines was commissioned to present a sustainable energy solution for the construction of Bolagsverket, the Swedish Companies Registration Office in Sundsvall, then owned by Fastighetsaktiebolaget Norrporten (now owned by Svenska Myndighetsbyggnader AB). Today, Energy Machines’ geothermal solution provides the Sundsvall Company Registration Office with 100% of its total energy requirement.
With the implemented solution, geothermal energy is collected from an aquifer in a unique sand deposit that runs beneath the Sundsvall town center. This solution provides an external heat source at a stable temperature of 7-9 °C all year round. Ninety percent of the property’s total energy requirements are retrieved through the aquifer, which provides energy via an integrated, sustainable, and fossil-fuel-free energy system.
The energy required to operate the property is equivalent to the energy consumption of approximately 100 houses. With Energy Machines’ solution, the property owner only needs to purchase energy that is equivalent to the consumption of 10 houses, while the rest is gathered from the aquifer.
In the summer, groundwater is used to cool the property. In the winter, heating and domestic hot water are produced for the property. Additionally, outdoor ground heating is provided to some 600 m2.
On an annual basis, the energy system has a total COP factor around 10. This means that the building’s use of purchased energy is 12 kWh/m2/year.
The energy central was commissioned in 2008 and continues to perform well today.
Bolagsverket was the first property in Västernorrland to be Green Building certified. The property has a total floor area of 21000 m2, where 12000 m2 is comprised of offices and 9000 m2 is garage space. The garage is ventilated 8,760 hours per year and kept at a temperature between 16 °C and 18 °C. The outdoor 600 m2 surface is heated to keep the garage driveway, entrance, and cargo area free from snow and ice.