Through continuous efforts over 14 years to improve energy consumption via the operation and control of its machinery, the Shiodome Building has reduced its energy use by 51.9% as revealed by its measurement data compared to when it was first completed in 2003. The majority of this reduction was achieved through a steady cycle of actions referred to as energy-saving tuning.
The precondition for the reduction of energy consumption is to take measurements and visualize the energy consumption. The office floors, which were to set the standard, were split into five blocks in order to measure the air conditioning, lighting, and electricity from sockets, while calorimeters were placed on the air conditioners. The 5,000 pieces of data acquired through this initiative were then checked against the operating condition of the equipment for analysis.
The SatTool, developed by Panasonic itself, was used for the analysis. This cloud-based software makes it easy to work with trend graphs and scatter diagrams, even without specialized knowledge. This makes it possible to pinpoint certain days or locations and determine trends for internal environments (temperature and humidity) and energy usage, while checking equipment settings at those times.
The results of the analysis are then applied to the tuning of the equipment settings to save energy.
Ever since it's completion, the Shiodome Building has had an energy-saving technical committee to fulfill this role. The committee includes inside and outside experts who put forward multiple ideas to reduce energy, from the air conditioning and lighting to facilities in the staff cafeteria. Hypotheses are put forward based on past data, then tested on model floors. With air conditioners, for example, requirements were carefully tuned to achieve optimal operation, including running times and adjustment of the volume of outside air taken in according to the number of people present.