The use of renewable energy and its sources on site combined with systematic use of energy-efficient building standards, will make BaseLink a showcase project.
The key points in brief:
• Use of geothermal energy
• Central supply of heat, refrigeration and electricity
• Photovoltaic installations
• High-performance fiber-optic network
Core concept for energy
When it comes to creating an energy concept that is fit for the future, the reduction in energy consumption and consequently CO² emissions as well as the use of renew-able energy are of key importance. The principles for shared heat, refrigeration and electricity generation are derived from this core idea.
• 100 % renewable energy for the base load
• Photovoltaic installations for power generation on all roofs
• Certified energy standards such as MINERGIE, DGNB, LEED or BREEAM are possible
Use of geothermal heat
The system of borehole heat exchangers works like a large battery and can be oper-ated in both directions: it can be used for heating in winter and for cooling in summer. Closed-circuit cooling via the system of borehole heat exchangers brings about regeneration in the ground. To achieve this, at the site 220 borehole heat exchangers are sunk into the ground up to a depth of approx. 250 meters.
Central supply of energy
Heat and refrigeration are generated together in central systems and distributed over the whole site via trunk feeders. The supply concept is designed so that it can be implemented in stages. Two central energy units (dimensioned for the site in its final configuration) will be installed when construction starts. The fields of borehole heat exchangers are installed in stages for this. Boilers for peak loads, which can be operated with renewable biogas, are installed in addition in order to achieve the best possible design in terms of technology and efficiency. Compared to conventional heat generation systems, geothermal heat storage systems have both ecological and economic advantages. Looking at the direction in which energy prices are moving, the use of ground heat will have a positive impact on operating costs. Furthermore, not to forget subsidies and tax levies on CO².
Locations for medium-voltage transformers (13 kV, or 20 kV to 0.4 kV) are planned on the site, which can be installed to meet the requirements of the individual stages. This allows power to be transformed close to the consumer, which provides greater security of supply as well as reducing energy losses. High reserves of power are available, thanks to central integration into the higher-order power network.
Where electricity can be found, fiber optic communications are generally not far away. EBM Telecom AG provides access to a high-performance fiber optic network with the appropriate computer centers and provider offerings to support these. A PoP (Point of Presence), which already provides some districts of Allschwil with TV, Internet and telephone services, is installed on the existing site. Future customers can be provided with the latest IT and communications services via this powerful connection.
In its final form, the site will contain up to 35,000 sq.m. of roof space. These roof areas are part of the energy supply concept and must be fitted with photovoltaic systems or be made available on a contract basis. At its peak, this will generate just under 1.6 MW of power, providing around 1,600,000 kWh of usable energy, which can supply over 350 households.
Redundant systems are important for re-search, development and production in the high-tech sector. The supply of heat, refrigeration, electricity and IT to the site can be fully safeguarded via redundant connections. EBM (Elektra Birseck co-operative) and partner companies provide a reliable supply from one source.