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Modern New Nanmen Market Sets Sights on Gold Green Building Rating

The “Nanmen Building and Market Reconstruction Turnkey Project” is one of the key components in the Taipei City Government’s program to rebuild the city’s public markets. Construction has proceeded at a rapid pace since work commenced on December 1, 2019. Taipei City is taking the opportunity offered by the rebuilding of the traditional market to incorporate green building concepts into the planning and design. These included the use of green building design techniques aimed at the four dimensions of “ecology, energy efficiency, waste reduction, and health.” The design was subsequently certified as a candidate for a “gold” green building rating by the Taiwan Architecture & Building Center (TABC). Once it is completed in 2023, the new Nanmen Market will provide city residents with a brand new market that is well-lit, safe, and hygienic. It will also be environmentally friendly and make efficient use of resources. 
Chief Chun-ming Yen from the Architectural Design Section of New Construction Office, Public Works Department, Taipei City Government, stated that the increasing density of cities in Taipei City is continuing to exacerbate the urban heat island effect. To alleviate this effect, particular emphasis was placed on the “ecology” aspect of the “Nanmen Building and Market Reconstruction Turnkey Project.” Large trees will be planted around the site to reduce the direct absorption of heat by the surface and improve water retention. An urban farm will also be established on the roof to increase the amount of green surface through vertical greening. In terms of "energy efficiency,” radiant heat absorbed by the building shell translates into higher indoor temperatures that account for most of a building’s energy consumption. A grilled design was therefore chosen for the building facade to improve the flow between the city and the market. The design also reduces the amount of solar radiation in the vertical plane and keeps most of the thermal radiation outside of the building. An insulated low-emissivity glass was also chosen to complete the energy-efficiency double-layered building shell.
Yen added that steel structures were extensively used instead of steel-reinforced concrete throughout the project to reduce the amount of carbon emission during construction. For “waste reduction,” dry walls were also used for interior partitions instead to reduce the overall weight of the building as well as the amount of structural CO2 emissions. To provide a “healthy” environment, the project building will be air-conditioned all year round, so excessive concentrations of CO2 may make users feel stuffy. To reduce the chances of this happening, air vents and air holes that draw in fresh, outside air are provided for every space inside the building. Indoor users can therefore enjoy both air-conditioned comfort and fresh air. To ensure a healthy indoor environment, up to 75% of the building materials used indoors were certified green building materials.
Kedge Construction Co., Ltd. commissioned the architecture firm Bio-Architecture Formosana to develop the planning and design for this turnkey project. The designers explained that environmental sustainability was made a priority for the project’s planning and design. That was why their proposal volunteered to upgrade the green building rating of the project from bronze to gold. The latest Green BIM techniques were also introduced during the planning phase. Typical Meteorological Year 3 (TMY3) data from the Central Weather Bureau were compiled to analyze the seasonal wind, sunlight, and rain characteristics of the Nanmen site. Environmental modeling was then carried out using the analytical data. The building design was then validated and fine-tuned with the model to arrive at an optimal design for an energy-efficient building.