Architecture, Energy and the Environment
By Randall Stout

When I free-associate with the word "environment" I conjure up impressions that can be categorized as Built, Urban and Natural environments. The notion of built environment ranges from site-specific art installation, to "undesigned" engineering infrastructure, and all forms of architecture from barns to important civil buildings. Within this entire spectrum of built intentions my overriding interest is in innovative spatial experiences. My images of urban environment tend toward seeing large-scale patterns of connectivity, human scale and social space. Also with my profound respect for the natural environment I visualize wildlife, old growth forests, the health of our rivers and oceans and the atmosphere. These images resonate as I simultaneously consider not only our present situation but also the projected impact on future generations.

I am delighted that this word "environment," with its multitude of meanings, has become inextricably associated with my practice, as has the notion of "alchemy" which first came about from editor Bob Ivy and writer David Hay who in an article in Architectural Record attributed this term to the material expression in my work. Exploring combinations of common and state-of-the-art materials to create innovative solutions and evocative forms has perhaps brought out the "alchemist" in me, as we strive to make something magical from the everyday life that surrounds us all. Regardless of which environmental realm a particular project embodies the following three ideologies drive my design sensibilities.

The Importance of Emotive Perception and Human Spirit
The first constant is an awareness of our post-Freudian world, in which we understand the mind's perception of space as either symbolic (that which we have experienced and assigned meaning to) or affectual (to that which, as a new experience, we respond emotively). These affectual experiences elicit the type of wonder and joy that fills children's lives. Architecture has the ability to extend beyond the known and symbolic realm of architectural styles to create emotive experiences and uplift the spirit of all users and ages. The joy of providing this uplifting experience motivates my investigations into new form and spatial qualities.

Connecting Architecture to a Broader Perspective
The second thread through my work is attempting to connect it to a broader perspective. My immediate interest is in relating to the world we live in, rather than the discourse of architectural history. Architecture seems more meaningful when it engages other aspects of our lives such as art, science, landscape, and nature. Inspiration can come from observing these sources. I frequently photograph places or objects which are not "designed" but have strong spatial or visual qualities. Some of them include the Antelope Canyon in northern Arizona; the underside of the Pier in Santa Monica, California; the interior of the barn I played in as a child; and some lobster traps in Portland, Maine. All of these images have influenced certain projects and are examples of delightful spatial and visual experiences based on the manipulation of light, structure, and enclosure. In addition to these unique images, new technologies and scientific advancements influence my work. The Hubble telescope's first glimpses of nebula beyond our solar system and merging galaxies 300 million light years away exemplify how science provides new cultural insight. Likewise, I believe that the making of architecture, from design through fabrication, should provide new insight and understanding while simultaneously engaging and challenging the breadth of contemporary life, new technologies, materials, and automated construction methods that define our 21st century.

Social and Cultural Awareness through Architectural Ideas
It is my belief that architecture can yield meaningful personal experiences and also collectively help us question, understand, and define our contemporary society. By artistically engaging current technology and social concerns, it becomes possible to view architecture, society, and culture from a new perspective. It is up to each visitor of our buildings to come away with their own understanding of what we have done. To me, this perspective jettisons prejudice and socioeconomic hierarchy, welcoming all people to a holistic enjoyment of the world in which we live.

Process
One of the most important steps in the process is listening.

I listen intently to clients and ask numerous questions to understand their goals and philosophy, as well as their program and functional relationships. Finding the ideal functional diagram is basic to a successful project. Therefore, my firm often generates several model studies that relate to program distribution on the site, functional adjacencies, contextual issues, and massing before the form studies are begun. Neither my formal solutions nor the design references are premeditated; rather, they are the result of a highly involved study technique that utilizes models, computers, sketches, analytic diagrams, and photography, while simultaneously engaging in an intensive dialogue and relationship with the client and the site.

A significant part of our design process, relies upon the use of models at various scales to address everything from how the building fits within the neighborhood to full-size mock-ups of construction details. This highly visual, hands-on medium facilitates client understanding and participation. During this process we collaborate fully with the client and the end-users to explore and more accurately understand their goals and attitudes. Integrating the clients and users as members of the design team results in an exciting aesthetic variety. The models often range from simple wood blocks that represent massing to refined assemblies including interiors and internal lighting to create nighttime images. The ability to solve planning and program problems in relation to urban context is enhanced with this methodology. These models, despite being "process" models, serve well to build client support and community enthusiasm for projects. They also allow the engineer/consultant and contractor team to clearly visualize the project, thereby improving quality control in construction documents and clarify bidders' understanding of the construction requirements. When possible, I photograph the models myself, as I find the camera has a distinct way of forcing the eye to realistically evaluate visual compositions from the user's position on the ground plane. This personal view allows the client to avoid misinterpretating the views of the model, (for example, as when seen only from above or from improbable angles, i.e. the helicopter view).

Where appropriate, computer applications help clarify building geometries. While our design often leads toward complex, unique forms, the computer helps us document rational and buildable solutions based on readily available construction systems and materials. Our databases reduce the need to interpret the design during the construction phase. In fact, one of our buildings, the Steinhude Sea Recreation Facility, was built without conventional construction documents. Instead, it was constructed as a panelized assembly in a factory from the three-dimensional computer databases that were created at the end of the design development phase. It was our first project for which the contractor submitted the entire building as something of a shop drawing. In the factory setting it was possible for portions of the project to be uniquely and economically fabricated by computer/robotic-driven cutting and assembly devices in a process coming to be known as "mass customization."

As a firm, we appreciate the craft of building and frequently establish working relationships with the building trades people during the design process. Trades craftsmen often know better than anyone else what creative direction their materials and fabrication tools will support versus what would surpass technical or cost limitations of their trade. When they are brought in early in the work process to participate with the design team, they gain a sense of ownership and commitment to the project that greatly benefits construction. These relationships allow us to explore unique materials and systems applications while maintaining constructability and controlling costs.

This intensive process leads to buildings that respond to our clients' needs. The clients' design aspirations, aesthetic preferences, site, program, budget, and schedule are integral to the generative forces for design. We delight in elevating all these to their fullest potential.

Applying Environmental Solutions
My earliest training as an architect was within the unique context of a small group of architects working for a federal agency with a shared commitment to residential applications of passive and active solar energy design. The time I spent with this team, the Solar Design Group of the Tennessee Valley Authority (TVA), from 1979 to 1981, occurred during a period when energy policy was a national priority. At that time President Carter had provided federal funding for the TVA solar research and development programs. The logic of solar energy applications combined with an understanding of fundamental design issues has remained with me throughout my career while the topic has fluctuated in political importance, frequently vanishing entirely from the client's perspective.

Today, building energy and environmental issues are regaining interest in the public and political realms. With evidence of global warming, atmospheric dissipation, greenhouse gases, and acceptance by scientific and political communities (as demonstrated by 1999's Kyoto Accord) of the damage caused by common methods of powering, heating, and cooling buildings, we must examine the ability of building envelopes not only to minimize consumption, but also to contribute significantly as a production resource.

As responsible participants in the building industry, our concern for the environment and the world we leave to future generations should mandate that design professionals, clients, regulatory agencies and lending institutions commit to making buildings that maximize environmentally friendly design and technology.

Numerous projects in this monograph utilize renewable resource technology. As I give an overview of my firm's work, I feel it is imperative to discuss energy applications and their environmental contributions. Often the public perceives energy conscious design as an afterthought, as frequently seen in roof-mounted solar collectors treated as appliquŽ to conventional forms. To me, a more engaging approach allows building designs to be informed by energy concepts from their inception so that the energy applications bring their own aesthetic influence into the design mix of concerns of form, space, light, shadow and materiality. Our buildings have taken this approach with a multitude of renewable energy systems and environmentally sensitive applications including natural ventilation, daylighting, passive heat gain, gray water recovery, photovoltaic cell electricity production, solar hot water collectors, co-generation, and high performance glazing systems.

The accomplishments on our overseas projects are in large measure due to the enlightened approach to energy conscious design that exists in Germany. Firstly, the political strength of the Green Party affects design through an energy policy evidenced in each step of the building permit applications process. Secondly, German lending institutions and governmental agencies take the long-term view of the development process; therefore, German buildings are frequently built with more durable materials that are intended for 50- to 100-year life cycles. This long-term view enables financial institutions to consider not only the initial capital expenditure (as usually occurs in the U.S.) but also the projected lifecycle cost savings from reduced energy consumption. Lastly, European energy and manufacturing companies have managed to avoid the patent purchase and suppression syndrome that has hindered manufacturing of solar-related products in the U.S. until recently.

One cannot address overseas work without mentioning the process and the people that made the work possible. Overcoming language barriers and differences in construction practices can be trying for even routine projects, requiring a special degree of patience, understanding, mutual goals, and camaraderie. This is even more the case when one is pushing the envelope with both architectural form and energy technology. I have had the good fortune to conceive projects with a wide range of bright and talented professionals. My long-term collaboration with the firm Archimedes (formerly UTEG) on multiple projects has led not only to project success but to lifetime friendships. In the beginning, communication was difficult and we frequently relied on drawing and model sketches as our universal language. With our mutual passion for ideas about architecture and protecting the environment came a resolve to overcome "business as usual" and delve into aspects of engineering, social issues, and economic issues usually excluded from the architect's realm. With the leadership of several key individuals we surmounted routine difficulties such as software compatibilities, multilingual project meetings, differences in documentation, regulatory reviews and the permitting procedures involved in just getting projects engineered and built. Without these leaders, especially Dr. Manfred Ragati, Hartwig Rullkštter, and Jurgen Kštter, as well as their dedicated staff, the projects would never have happened.

Natural Ventilation
Natural ventilation methods were integrated in the Bückeburg Gas & Water Co., Steinhüde Sea Recreational Facility, Melittabad Aquatics Facility, Rehme Water Station, and Bünde Fire Station. In each, the ventilation design was tailored to the very different functions of the facilities. In Steinhüde, for example, we integrated vent slots into the faŤade at the intersection of the wall and roof planes. Alternately, in the cases of Bückeburg, Bünde and Rehme, operable windows were sized and placed to promote cross-room ventilation. Melittabad's large operable glazing walls create a naturally ventilated, semi-enclosed space. Each of these designs responds to the direction of prevailing breezes during the cooling season, taking advantage of windward and leeward pressure differentials. Where roof cross-slopes exist, the ventilation design maximizes the advantage of natural convective air paths. For high spaces and atria, we proportionally sized ventilation openings to increase the Venturi effect, flushing rising warm air from the building.

Daylighting
Through three primary techniques, we use daylighting on nearly all of our projects. The first approach utilizes well-proportioned glass height to room depth ratios to adequately distribute daylight within a space. The second technique uses translucent wall and roof panels to admit a great deal of diffuse exterior light, simultaneously lighting the space while avoiding harsh shadows and glare. The third approach employs a particular type of photovoltaic panel: consisting of dual, clear-glazed, sealed units containing photovoltaic wafers organized in a grid with one half inch spacing. With this type of panel approximately 80% of the sunlight it receives is captured by the photovoltaic cell and 20% is admitted through the glass layers to light the space. In this approach the photovoltaic panel serves as not only energy producer but also as building envelope and light filter for daylighting.

Passive Solar Heat Gain
Because most of our commercial and civic projects have no nighttime occupancy, their passive heat gain designs are specifically oriented to daytime and early evening temperature moderation. Such projects do not have the significant thermal storage mass found in residential passive solar designs where the thermal lag time is designed to warm the house in the evening/nighttime. In simple applications, such as Rehme, we maximized southern exposure and provided relatively thin thermal storage surfaces so that the radiant effect could be recovered in the early evening, while the building is still occupied but after direct solar gain has ended. Warm air returns were designed for taller spaces, allowing heated air to recirculate through the lower levels.

Active Solar Systems
In Bückeburg, we used active hot water collectors linked to a heat exchanger, which was in turn linked to concrete thermal walls in the atrium. Taking advantage of principles of radiant heat and thermal convection, the automated building energy management system directs heat into the atrium walls to function as a radiator during cold winter months. By reversing the system, the walls serve as a heat sink to cool the space in warm summer months.

Gray Water Recovery
Gray water recovery techniques, used in Rehme, Steinhüde, and Bückeburg, are generally accomplished by collecting rainwater from the roof and storing it for use as a non-potable water source. Occasionally, this is also accomplished with unguttered roofs that allow rainwater to flow over a hard-scape plaza to area drains, which recover the water and store it for landscape irrigation. These techniques minimize environmental damage such as soil erosion and surface run-off that might carry pollutants into nearby water sources, while also reducing demands placed on storm sewer pipe infrastructure. The system's collection method starts with the building envelope and a well-planned roof drainage system.

Photovoltaic Cell Electricity Production
We have used arrays of photovoltaic cell panels for electricity production on several projects including Steinhüde, Melittabad, and Bückeburg. A wide variety of panel types have been employed, including flexible panels encased in plastic in Melittabad, roof-mounted opaque panels in Bückeburg, and panels integrated with double glass skylight units in Steinhüde, where the array serves not only the building's lighting and power needs, but also stores electricity for the rechargeable electric boats at the nearby pier. (The Steinhüde project's photovoltaic system was funded by a grant from the German government after receiving the "SOLTEC 99" award for "Innovation in Energy Technology.") To the extent possible, these systems are conceived during the earliest design phases of the project to maximize their technical integration, and aesthetic contributions.

Solar Hot Water Collectors
Solar hot water collectors are used in the Steinhüde, Bückeburg, Melittabad, and Bünde projects. Some are of the conventional type: flat panel/copper tubing collector plates. A different collector type, used at Steinhüde and Bünde, utilizes glass tubes, backed with a reflective lining that concentrically focuses the maximum sun energy toward a water-filled coil at the tube's center. The greenhouse effect is at work here, trapping longer far-infrared wavelengths within the glass tube to create very high temperatures inside the collector. This system also admits daylight along the edges of the glass tubes into the space behind the collector, contributing to the project's daylighting design.

Co-generation
Co-generation units of dramatically different scales have been used in three of our projects, the North Minden Power Plant, Melittabad, and Steinhüde. Behind each of these is the concept that an electricity-producing generator turbine's engine housing has cavities through which water can be circulated as a heat sink, drawing waste heat from the housing before it can dissipate into the air. The recovered heat can be used as steam for radiators or hot water for the building's water supply, among other functions. The North Minden Power Plant's turbines, sized to serve a city district, are fueled by clean-burning natural gas, as is the smaller, community-sized turbine for the Melittabad project. The location of the Steinhüde project -- on an island nature preserve without connections to the city gas supply lines -- led to the selection of a natural oil processed from rapeseed to fuel its co-generation micro turbine.

High Performance Glazing Systems
A well insulated building envelope includes not only traditional methods of wall and roof insulation, but also the creation of thermal barriers in other building systems not normally thought to contain insulation. One such example is glazing systems. Aluminum mullions (and all metal mullions for that matter) have historically had the problem of creating thermal leaks as the thermally conductive metal is exposed to both the interior and exterior temperature and humidity conditions. State-of-the-art glazing systems now have not only double or triple-glazed sealed, low-E, insulating glass units, but also a thermal isolating device inside the mullion itself that insulates while maintaining the structural integrity of the mullion. Usually a dense neoprene extrusion, this device structurally interlocks the interior and exterior components of a mullion assembly and breaks the thermal bridge historically present in glazing mullions. Heat gain or loss through the metal portion of the window system is thereby greatly reduced while window "sweating" is eliminated. As glazing technologies advance, our projects are attaining higher and higher values relative to thermal envelope performance.

The cumulative effect of the techniques mentioned here as applied in the firm's completed projects through 2002 results in an annual carbon dioxide emissions reduction of 38,900 cubic tons compared to conventional building techniques and electricity supplied by a coal-fired power plant.