Spring 2013

Energy Efficient Japan

A hallmark of the CED program is its relentless commitment to addressing the most critical challenges facing society today with an attention to sustainability, design excellence, community involvement, and technological expertise. CED faculty continually lead the way in promoting these values not only in the classroom but beyond it as well.

No event demanded the application of these principles more than the disaster that occurred March 11, 2011. The most powerful earthquake ever to have hit Japan caused huge devastation triggering a massive tsunami responsible for meltdowns and explosions at the Fukushima Daiichi Nuclear Power Plant. Along with tremendous rebuilding needs, the country whose lifestyle depended on reliable electricity, was now forced to rethink its energy use.

This became the catalyst for Architecture.Energy.2011, an intensive 4-day workshop, June 23–26, 2011 in Tokyo, developed by CED Professors of Architecture Dana Buntrock and Susan Ubbelohde. Intended as a quick response to the catastrophe with longer-term follow-up, the workshop was designed to introduce advanced concepts of building energy use and occupant comfort through the lens of architectural space and material as a filter for the environment. A subsequent workshop was held in August of 2012 at Berkeley, offering participants knowledge and skills that continue to be applied today.

handbook used in workshop
A page from the handbook used in the 2011 workshop in Japan, produced by Susan Ubbelohde’s practice, Loisos+Ubbelohde. Enlarge [+]

A different way of thinking

Having been involved in architectural research in Japan since the late 1980s, Dana Buntrock has an intimate familiarity with the country’s approach to building design and a strong affiliation with the architectural community there. She reached out to her colleague Susan Ubbelohde, realizing that while Susan and her firm, Loisos+Ubbelohde, had no prior experience in Japan, their leading-edge expertise in technical analysis and energy efficient building practices was essential.

Historically, Japan has placed little emphasis on basic energy conservation approaches, such as insulation, in architecture. Because living and working spaces are typically very small, and households are in the habit of heating only one room at a time, per capita energy use has been relatively low. Energy saving practices that we take for granted in the US — like thermal insulation, day-lighting and energy performance measurement and analysis — are rare in Japan and although a building code related to energy consumption exists, compliance has been voluntary. While Japan places great importance on environmental policy as it concerns greenhouse emissions, there was little relation to efforts to reduce overall energy consumption, especially connected to buildings.

Buntrock and Ubbelohde were not out to champion California energy policy. “We were not interested in suggesting we are better at energy conservation than Japan, but simply that we offered a way of thinking that filled out an area where Japan had not yet developed strengths,” explains Buntrock. Ubbelohde echoes the sentiment, “Japan has a challenge to maintain their current quality of life without nuclear power. Japanese architects now have the opportunity to look at building science as a means of addressing that.”

Light. Heat. Air. Energy.

The June 2011 workshop, funded through a variety of resources that Buntrock and Ubbelohde put together, including money from the UC Berkeley Center for Japanese Studies and personal resources, was designed to provide tools and ways of approaching energy efficiency for architects already leading the profession in Japan. Seminars on the physics of building performance based on daily themes — Light, Heat, Air, and Supplementary Energy — were followed by an Environmental Measurement segment where participants used devices to discover how metrics relate to experience, and a Design Lab where teams were tasked with re-designing a contemporary building. Energy modelers from Loisos+Ubbelohde and UC Berkeley simulated energy performance and gave feedback to the participants as they worked.

Measuring wall surface temperatures
Participants at the 2011 workshop in Tokyo use infrared sensors to measure wall surface temperatures. Enlarge [+]

The workshops were truly a cross-cultural collaboration, with organizers and leaders from both Japan and the US. Along with Professors Buntrock and Ubbelohde, and L+U principal George Loisos, groups were led by L+U staff Brendon Levitt, Ibone Santiago, Eduardo Pintos — all CED alumni — and Santosh Phillip. CED graduate student participants included David Fannon (M.Arch ’12), Kyle Konis (PhD Arch ’11), and Jeremy Fisher (M.S. Arch ’11). Collaborators in Japan who helped with organization and logistics included Shuzo Murakami, Building Research Institute; Masao Koizumi, Tokyo Metropolitan University; Kengo Kuma, Tokyo University; Nobufusa Yoshizawa, Insitute for Building Environment and Energy Conservation; and Balazs Bognar, Kuma and Associates.

Kyle Konis and Tokyo-based architects
Kyle Konis (UCB PhD ’11), now a professor at the University of southern California, reviews performance data with a team of Tokyo-based architects. Enlarge [+]

Response was overwhelming. All together, 57 individuals participated. Many firms and organizations, under pressure to respond not only to the paradigm shifts in thinking about energy, but also to the more immediate need to rebuild in devastated areas, sent different participants on different days.

Workshop presentation
Mr. Norihisa Kawashima, an architect at Nikken Sekkei, and other Japan workshop participants present the results of four intensive days of redesign to Professor Susan Ubbelohde and George Loisos. Enlarge [+]

The follow-up workshop the next year at Berkeley, funded by a grant from the Japan Foundation’s Center for Global Partnership, focused on energy efficiency from a policy and application perspective, and concentrated on a more substantial sharing of available tools. Many of the same participants or participant firms took part in the second workshop along with first-time attendees.

Expressing her amazement at the level of engagement of the workshop participants, Susan Ubbelohde remarked, “These were some of the best designers I had ever worked with. Since the workshop, we’ve had a number of architects and engineers from Japan visiting the office and now there is an ongoing dialog that has really benefited the entire office. It’s been great.”

Bill Burke speaking at workshop
Bill Burke explains the use of the artificial sky during a tour of the Pacific Energy Center in San Francisco, part of the 2012 workshop. Enlarge [+]
Professor Dana Buntrock and Japanese architect Mr. Masatoyo Ogasawara
Professor Dana Buntrock and Japanese architect Mr. Masatoyo Ogasawara, who participated in the 2012 Berkeley Workshop. Enlarge [+]

Making a Difference

While it may be a while before significant results are achieved, participants are beginning to put their experience to use. Norihisa Kawashima, an architect at Nikken Sekkei who came to Berkeley as a visiting scholar and worked with L+U to learn Berkeley-based simulation approaches, is now back at Nikken Sekkei sharing what he has learned.

Partners from the Tokyo-based ADH Architects, designing publicly financed homes in the earthquake region, have been working with L+U to propose upgraded approaches to efficiency. They will work with another workshop attendee, Dr. Masayuki Mae of the University of Tokyo, to do thermal testing after completion.

Not surprisingly, the workshops have also had an impact on the Berkeley student participants and faculty. David Fannon now works as a building scientist and specialist in high-performance design for Syska Hennessy Group in New York. Kyle Konis was moved after meeting young Japanese designers who, though their lives had been dramatically affected by the disasters, were driven to have a positive impact. Konis now teaches sustainability classes at USC and has incorporated his Japan experience into the themes of his teaching.

“There are social implications to energy,” explains Dana Buntrock. “Without electricity thousands of buildings in Japan became at least temporarily uninhabitable because of poor thermal and day-lighting qualities. Beyond reduced reliance on fossil fuels, which Japan now must consider, energy efficiency has larger implications for human comfort. I’m hopeful that we’ll be able to continue working with Japanese colleagues on the energy demands of buildings.”

More information about Architecture.Energy.2011