In 2020, the Cabinet Office published a guideline (reference architecture) on “cyberspace” infrastructure technology for the realization of smart cities. In the future, new services are expected to be created as the digital data infrastructure of cities (urban OS) is developed and data linkage with the “physical space” of real cities increases. 　　　　　　　　　　　　　　　　　

Takenaka Corporation has developed a building OS, “BiruKomi,” which can be easily linked to urban OS and data, to realize highly functional smart buildings. In addition, we are actively promoting urban development based on the “digital twin” concept, in which data collected from the real world are reproduced on a computer. 　　　　　　　　　　　　　　　　　

About “BiruKomi”

“BiruKomi” is a cloud-based building data platform that uses open communication standards to efficiently handle big data from building equipment systems and IoT sensors.

By combining advanced network technology and open data infrastructure technology, it is possible to securely connect the systems in the building to the cloud and continuously provide high value-added building services.

Smart building results using the “BiruKomi” data infrastructure

By processing building big data using “BiruKomi,” we are upgrading building functions from visualization to the application of AI to realize smart buildings with unprecedented high functionality.

Case study

Achieving net-ZEB through the renovation of existing buildings (first in Japan)

In 2003, Takenaka Corporation's East Kanto Branch achieved net-zero-energy building (ZEB) in one year by renovating existing offices while they were still in operation.

To balance the building's energy supply and demand throughout the year, energy management was enhanced by monitoring screens, and machine-learning-based estimation and statistical models related to supply and demand were used to implement optimal control of the building's facilities. IoT sensors were also used to manage attendance, personal air-conditioning, and smart watches to collect data on activity to ensure both comfort and energy efficiency.

Use of IoT to achieve energy conservation and comfort

The new Yokohama City Hall has realized a highly functional building energy management system (BEMS) with functions such as energy visualization, load prediction, and the optimization of building operations on a cloud infrastructure.

In addition, by creating an IoT sensor network in the room and systematizing the comfort of the working environment and energy conservation promotion activities with staff participation, we are aiming to achieve both energy conservation control and comfort.

Architecture that grows with people “EQ House”

EQ House is “sensor architecture” with more than 1,000 building facilities, and measurement and control points in an area the size of a detached house. Advanced building control, such as remotely changing the lighting environment and managing energy conservation based on future load forecasts, is realized by collecting and processing sensor data in “BiruKomi.”

We have developed the “Archiphilia Engine” system to control building facilities automatically while learning user preferences by incorporating detailed information about the user's posture and indoor environment. This is done through various IoT devices, such as motion sensors, environmental sensors, and wearable devices, which can also support future manpower-saving management.

"Archiphilia Engine"

The Archiphilia Engine uses a method called “reinforcement learning,” in which the system searches for the optimal solution and controls itself.

The adoption of this AI-based reinforcement learning engine for processing building big data to solve complex issues unique to buildings, such as balancing comfort and energy efficiency, is the result of our open innovation efforts in collaboration with new ICT business partners across industries.