Meilahti Tower Hospital
Significant project data:
Area designed: 115,000 m2
Level of BIM development: LOD 350-400
Client: HUS-Kiinteistöt Oy – Public institution
Purpose of BIM use:
The project involves the refurbishment of the Meilahti Tower Hospital (HUS) in Helsinki. The building with 17 floors was built in 1965 and had many energy and environmental problems. For example, the high humidity and wind loads due to its closeness to the sea, poor air conditioning and heat recovery, low energy efficiency and low air quality in the interior. The main objective was to convert a 1960s building into a highly efficient building in terms of energy.
Granlund was responsible for designing the engineering services that include heating, ventilation and air conditioning (HVAC), electric, health, automation and building control systems and also energy efficiency consulting services. BIM was used for the designs of engineering systems and also for the simulation of energy efficiency.
In energy efficiency simulations, the main application was to be able to investigate savings in different areas of design. For example, the windows and components of the façade were modelled and studied in detail to choose the best solution possible. The new windows contain two double windows (4 layers) and the façade contains a double layer of glass. In addition, simulation and analysis were used for the design of the heat pumps and the energy recycling systems.
For energy efficiency simulations the RIUSKA programme was used, which calculates energy efficiency based on the heat performance, weather conditions and different loads.
Description of the success achieved:
Through an integrated design of the engineering services based on BIM tools it was firstly possible to reduce most of the interferences of the different engineering systems before starting work. The communication between engineering consultants improved considerably. Furthermore, it was possible to carry out energy efficiency simulations, calculations of the life cycle cost, simulations of air quality, visualisations and the possibility of combining different BIM models.
The Tower Hospital expects to reduce heating consumption by -25% and electricity by -5%.
The hospital now also has modern automation and control systems that have been shown to be very effective for saving energy.