At Nikken Sekkei, we have been striving to create social value throughout our 125-year history. We focus on architectural and urban design that emphasize reducing environmental impact and contributing to society. Through co-creation with our clients and partners, we aim to achieve a sustainable society. These advanced initiatives have been highly acclaimed both domestical-ly and internationally, leading to numerous awards and certifications. Development of a next-generation perforated panel duct natural ventilation system that supports bi-seasonal adaptation.Constructing TABS that contribute to whole-life carbon reduction and improved resilience performance.Achieved a 25% energy savings compared to the time of completion through continuous efforts over more than 10 years. Creating a ‘natural’ office surrounded by trees for a comfortable workplace. 6Environmental Awards and CertificationsGHGClimateGHGClimateResilienceClimateBEMSGHGGHGClimateHealth&SafetyEnvironmental and Equipment Design AwardYANMAR TOKYOIn Japan, transitional periods are becoming shorter, leading to a two-season system of sum-mer and winter. As a result, the effective period for natural ventilation, one energy-saving method for air conditioning, is decreasing. Therefore, a natural ventilation system was devised using a perforated panel duct that evenly distributes air from the indoor ceiling surface, allowing for natural ventilation, even at lower outdoor temperatures, without causing drafts. This system has achieved an approximately 70% extension of the effective period for natural ventilation. Additionally, excess heat from the cogeneration system for office buildings is released into the gravity ventilation shaft to improve natural ventilation performance during transitional periods.Photography: Kawasumi & Kobayashi Kenji Photo StudioSociety of Heating, Air-Conditioning and Sanitary Engineers of Japan (Technology Promotion Award)Meiji Ad Agency HeadquartersWe have introduced the Thermo Active Building System (TABS) that utilizes thermal mass of building structure for radiant heating and cooling. By achieving high-efficiency air conditioning, reducing floor height, and decreasing the capacity of heat sources, we are working to reduce greenhouse gas emissions (whole-life carbon) throughout a building’s lifecycle (construction, operation, and demolition). TABS also contributes to improved resiliency by mitigating temperature fluctuations even after air conditioning halts due to power outages.Photography: SS Co., Ltd.Special Award ‘Ten-Year Award’ from the Society of Heating, Air-Conditioning and Sanitary Engineers Tokyo Denki University, Tokyo Senju CampusCompleted in 2012, this project was designed with the goal of achieving best-in-class CO2 reduction performance among science and engineering universities in Tokyo. For the fol-lowing 11 years, we maintained a system that included members from the client, as well as academics, designers, constructors, building managers, and students, and continued to imple-ment energy-saving activities. As a result of various measures such as tuning using BEMS (Building Energy Management Systems), integration with the university information system, and degradation audits, the building achieved a 25% reduc-tion in primary energy consumption and a 17% reduction in peak power compared to the time of initial completion.Photography: ARCHI PHOTO Shunji KitajimaShizuoka Prefecture, Ministry of Life and Environment Award for Environmentally Friendly Buildings Hamamatsu Iwata Shinkin Bank, Headquarters and Main branchThis is a new construction plan for the headquarters and main branch of a credit union, located with a view of Hamamatsu Castle. The building is wrapped in terracotta exterior louvers with gradationally changing angles, balancing solar control, airflow, and privacy while ensuring a pleasant view. By offsetting the outer columns, the amount of foundation structure is reduced, allowing for an outdoor-like atrium that tolerates thermal environment variations, thereby reducing costs and CO2 emissions. We aimed to create a ‘natural’ office that positively embrac-es and accepts environmental differences and unevenness.https://hamamatsu-iwata.jp/topics/news/20220901_8456.html
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