Tuesday, January 26, 2016: 8:00 AM-9:30 AM
International Design
Chair:
Shinsuke Kato, Dr.Ing., University of Tokyo Institute of Industrial Science
Sponsor: SHASE
If you have an old building, there are two possibilities to treat it. One is to demolish it and another is to retrofit it. This session introduces best practices in both cases. One is an environmentally friendly closed type demolishing method which was adapted for two skyscrapers in Tokyo. Another one is the retrofit project for large office complexes, whereby the water transport system for district heating and cooling was significantly improved. The third one is a medium-sized office building, in which an expanded BEMS, “Building Energy and Interactive Communication System (BEICS),” has been introduced.
1 Development and Application of an Enclosed Demolition Method with Environmental Consideration for High-Rise Buildings
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Taiki Sato, Taisei Corporation |
This method features an “enclosed demolition space” constructed on top of the building, where all demolition work is carried out. This helps exclude noise propagation and prevents dust from being scattered throughout the city neighborhood. In addition, it can achieve a better work environment. There are trade-off relations among these factors, so it is important to design natural ventilation appropriately. Two demolition projects helped prove the ability to reduce noise levels (by 20dB), prevent the dispersion of dust (by about 80%) and improve the thermal environment (by minus 2 degree in WBGT).
2 Energy-Saving Retrofit of Facilities in the Large Compound Building
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Takashi Momose, Shimizu Corporation |
In a large compound tenant building, within which a district heating and cooling system is introduced, we focused on the considerable water transport consumption and reduced it. We investigated the existing facilities and determined the situation. The method used for water transport was changed from direct to indirect method as well as a planned reduction in energy by devising pump selection and control. Moreover, the management company, designers, builders, manufacturers collaborated on a plan and helped reduce the large conveyance energy of 74%.
3 Green Building Renovation of H Office Built 35 Years Ago in Osaka: Equipment System Considering Occupants’ Behavior
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Shunsuke Nakajima, Osaka Gas Co., Ltd. |
For this renovation, several energy-conservation measures with adequate effectiveness and proven performance were installed. In addition, when planning this retrofit, we implemented thermal sensation votes and occupant detection devices to control the air-conditioning system based on occupants’ behavior. An expanded BEMS, the purpose of which was to enable interactive communication between occupants and facility managers, was also established to consider the occupants’ lifestyle. Furthermore, a cooling room was installed near an entrance to remove body thermal storage after outdoor activity in summer. Consequently, this renovation achieved 28% energy-conservation.