Last September, the Council on Tall Buildings and Urban Habitat invited me to serve as the special media correspondent for its Shanghai symposium, entitled Future Cities: Towards Sustainable Vertical Urbanism. I conducted video interviews with dozens of architects, developers, building managers, and others on topics relevant to tall building design and sustainable urbanism. Among the many designers, engineers and other tall building types I interviewed was Luke Leung, director of sustainable engineering for SOM. In Shanghai's Jin Mao Tower (an SOM building), we talked air quality, sustainable design metrics, and whether humanity might be able to build ourselves out of the environmental mess we find ourselves in. "The tall building can help to create better health and potentially less carbon emissions in the city per capita," Leung said, but he added it's important to address the issue holistically. We need to reduce emissions associated with embodied carbon, transportation carbon and operating carbon, Leung said: “We need to strike to make those three components to be all approaching net-zero.” Asked if LEED is still the best way to rank green buildings, Leung acknowledged shortcomings in how we talk about sustainable design. “It's amazing that the focus is on energy and water, while the building is designed for human beings,” he said. And he called for more attention to human-centric systems that address human health: “From that standpoint all the green building systems, they have room for improvement, but LEED is one that starts addressing some of those issues.” Finally, in light of technological progress, Leung stressed humility before nature. “[To] go back and listen to the basic laws of nature is our best bet,” Leung said. “But that time is limited.” Watch more videos on CTBUH’s website, and on YouTube. You can subscribe to their monthly video series here.
Posts tagged with "Air Quality":
Save for the extreme examples—Beijing's “airpocalypse,” for example—air pollution is often an invisible problem. For at least a brief period, designers from Brooklyn and data scientists from San Francisco hope to change that in Louisville, Kentucky. Across the city 25 sensors gather data on air quality, including the concentrations of particulate matter and carbon monoxide, transmitting the data to a colorful, interactive kiosk on the corner of Fourth and Liberty streets in Downtown Louisville. Designers at Brooklyn-based Urban Matter, Inc. dubbed their project Air Bare. As the downtown screen displays real-time air quality data, they invite passersby to engage with the installation. Encased in bright orange, powder-coated steel, a video screen fills with bubbles representing particles of air pollution. Poke your head into the display and you can pop the bubbles, earning points and taking air quality quizzes. Urban Matter's Rick Lin told WFPL the playfulness is meant to inspire action:
A big part of the component of this piece is educational, so once we grab people’s attention, we want—without being too preachy—to give them some information to help them make better decisions every day.Urban Matter conceived the short-term piece with the Office of Civic Innovation, Louisville Metro Government, and San Francisco's Creative Commons. On their website, the firm said they hope the project “creates awareness, identifies sources of pollution and propels the public to take action.” Open in time for a health symposium attended by Prince Charles, the piece will be up for six to eight months.
Sustainability and high design meet in Leddy Maytum Stacy Architects' affordable housing complex.Designing a sustainable building on a budget is tricky enough. But for the Merritt Crossing senior housing complex in Oakland, California, non-profit developer Satellite Affordable Housing Associates upped the ante, asking Leddy Maytum Stacy Architects to follow not one but two green-building ratings systems. "They wanted to push the envelope of what they typically do and decided to pursue not only the LEED rating, but also the GreenPoint system," said principal Richard Stacy. "So we actually did both, which is kind of crazy." Wrapped in a colorful cement-composite rain screen system punctuated by high performance windows, Merritt Crossing achieved LEED for Homes Mid-Rise Pilot Program Platinum and earned 206 points on the Build-It-Green GreenPoint scale. The building was also the first Energy Star Rated multi-family residence in California, and was awarded 104 points by Bay-Friendly Landscaping. Merritt Crossing’s 70 apartments serve low-income seniors with incomes between 30 and 50 percent of the area median. More than half of the units are reserved for residents at risk of homelessness or living with HIV/AIDS. Stacy explains that in the context of affordable housing, sustainability means two things. The first is quality of life for the residents, "the sorts of things that have a direct benefit to the people living there," such as natural daylighting and indoor air quality. The second is energy efficiency. "Both non-profits and [their] residents have limited financial capabilities," said Stacy. "The one time they have funding for that kind of thing is when they’re building a building. So we focused a lot on the building envelope in terms of energy efficiency. At the same time, we wanted to have ample daylight and controlled ventilation.” Finding themselves with unused contingency funds during construction Leddy Maytum Stacy Architects upgraded the exterior skin to a rain screen system of SWISSPEARL cement composite. "We worked pretty closely with the SWISSPEARL company," said Stacy, who noted that Merritt Crossing may be the first building in the United States to use the system. Though the panels are installed like lap siding they offer "the benefits of a rain screen in terms of cooling and waterproofing issues," he explained. To accommodate the thicker skin, window manufacturer Torrance Aluminum designed custom trim pieces, which "had the added benefit of giving us the appearance of deeply recessed windows," said Stacy. Insulation was a special concern for the architects, both because Merritt Crossing was built using metal frame construction, and to minimize air infiltration in keeping with the green ratings systems. The building’s exterior walls are wrapped in 1-inch-thick high performance polyiso insulation from Dow Corning with a Grace Perm-A-Barrier VPS vapor permeable membrane. "As a result we ended up with a very, very tight building from an air insulation standpoint, which means you have to pay more attention to air ventilation," said Stacy. To compensate, Leddy Maytum Stacy Architects’ mechanical engineers designed a special air filtration system for the building’s roof, complete with built-in HEPA filters. The building’s southwest facade faces a freeway, presenting potential noise and privacy issues in addition to exposure to the western sun. "We did a highly layered facade on that [side] where the actual exterior wall is back three to four feet from another screen wall," said Stacy. The outer wall "is a combination of typical wall assembly as well as GreenScreen panels that form a webbing of open areas and solid areas that help with sunshading as well as acoustical [dampening] and privacy." Greenery in balcony planters will eventually grow up and over the screens. On the ground floor, the garage is also enclosed in GreenScreen trellising, to enhance pedestrians’ view without sacrificing ventilation. Leddy Maytum Stacy Architects’ Merritt Crossing proves that affordable housing does not have to look institutional. The facade’s vibrant colors—green on the northeast elevation, red on the southwest—and playful punched texture pay homage to the neighborhood’s patchwork of architectural styles and building uses. The first major building in the planned redevelopment of the area around the Lake Merritt BART regional transit station, Merritt Crossing sets the bar high for future developments.
The design team at MODU, in collaboration with Ho-Yan Cheung of Arup, have created an urban public space for the 5th China International Architecture Biennial. Their design pays homage to Beijing's iconic Olympic Park, while drawing attention to environmental issues in the country’s densely populated capital. The biennial committee has also commissioned designs from leading international architects such as Wang Shu, Zaha Hadid, and Mohsen Mostafavi. The dual-purpose structure not only creates a unique civic space, but also acts as a barometer for the air quality in Beijing. This “room in the city” concept does not attempt to separate people from polluted outdoor air and filtered indoor air by means of physical boundaries. Instead, the structure highlights the air pollution issue through the use of punctured openings in the walls and ceiling panels, as well as a large elliptical roof which frames the Olympic Observation Tower. On clear days, the tower can be seen perfectly through the roof frame, but on days when the pollution creates a dense grey fog, the landmark virtually disappears from sight. The outdoor room is made from recycled materials and, according to its designers, represents a new era of socially responsive design. At the end of November, the structure will be installed in six other cities in China.
A web-like dome in Saginaw, Michigan changes colors to reflect the level of carbon dioxide in the air. Solar-powered LED lights connected to an onsite CO2 monitor illuminate the structure’s fibers in timed patterns to create the appearance of an organic response. On display in Saginaw’s First Merritt Park through October 31, the installation is part of the Great Lakes Bay Region’s “Art and Sol” celebration of art, culture, and science. The structure of Loop.pH’s SOL Dome was inspired by molecular biology. SOL Dome, eight meters in diameter, was constructed on site by volunteers over three days.