The office building in Lörrach is a new commercial construction that combines low space consumption, ecological objectives and high user-related requirements. The building was constructed as a new building on top of an existing basement and was consistently designed for low energy consumption and a high level of self-sufficiency.
A central architectural and energy element are the PVT heat pump collectors, which are installed both on the façade and on the roof. In conjunction with the central system, this creates a powerful PVT heat pump that provides electricity, heating and cooling in an integrated system. They characterise the appearance of the building and combine photovoltaics with efficient heat generation from the ambient air.
ENERGY CONCEPT
The office building’s energy concept relies on the intelligent coupling of PVT collectors, heat pumps and heat and cold storage units. The system thus represents a quiet, low-maintenance and architecturally integrable alternative to air heat pumps – without outdoor units, without noise emissions and with additional PV yield. The electrical energy generated is used directly in the building, while excess heat and cold are temporarily stored in buffer storage tanks.
In this way, around 80% of the office building’s electricity requirements can be covered. The heating requirements are covered entirely (100%) by the system. In addition, the integrated cooling function ensures pleasant room temperatures in the summer months – without the need for conventional air conditioning units.
SUSTAINABILITY AND IMPLEMENTATION
Sustainability was also a key consideration during the planning and construction phases: local companies were involved in both the planning and execution. Short delivery routes, durable system technology and a low carbon footprint for the products used support the project’s holistic sustainability approach.
CONCLUSION
The office building in Lörrach is a prime example of how a PVT heat pump with SOLINK collectors can be integrated into commercial properties in an architecturally appealing and energy-efficient manner. As an alternative to air source heat pumps, the system offers high self-sufficiency, year-round use for heating and cooling, and sustainable, silent operation. The high level of self-sufficiency, year-round use for heating and cooling, and the sustainable construction approach make the project a compelling reference for sustainable building energy concepts.