Some of Our Partners. . .
One of the great challenges facing the U.S. Department of Energy is
harnessing the power of its national laboratories in the post-cold-war era.
With a workforce of more than 30,000 scientists and engineers and a world-
class R&D infrastructure, the labs are a major national asset. Responding to
Secretary of Energy Hazel O'Leary's Task Force on Alternative Futures for
the Department of Energy National Laboratories, chaired by Robert Galvin,
the Center for Building Science has reviewed its history of doing research for
the benefit of the U.S. economy and the environment.
The Center has operated as a catalyst in the energy-efficiency marketplace for two decades, providing an extraordinary rate of return on the federal research investment. From the outset, the approach was not one of belt-tightening, but rather a coordinated technological and deployment-oriented strategy for doing more with less energy while saving money and protecting the environment. Partnerships with industry, utilities, government agencies, universities, and other national laboratories are an integral part of the story. LBL's specific accomplishments in the buildings sector demonstrate how the national labs can serve America today and into the next century.
Since the mid-1970s, a cumulative $70-million DOE research and development investment at LBL helped spawn a $2.5-billion annual U.S. market for four technologies and services. As of 1993, this R&D investment leveraged energy savings worth an estimated $5 billion to consumers ($1.3 billion in 1993 alone). By 2015, electronic ballasts, advanced glazing materials, and residential appliance standards will be saving consumers $16 billion annually. These and other savings will be made possible by new computer design tools, also developed at LBL.
LBL's broader role in the buildings arena includes analyzing public policy issues such as the role of efficiency options as a mitigation strategy for global climate change, developing planning and demand-side management methods used by electric and gas utilities, identifying technologies and analytical methods for improving indoor air quality, contributing to the information superhighway, and focusing on the special problems and opportunities presented by energy use in the public sector. These and other activities are conducted at the local, national, and international levels.
Accelerating the Market for Energy-Efficient Lighting
The electronic ballast is a technology that improves the efficiency of
fluorescent lighting systems by up to 30% and enhances quality and
flexibility. During the incubation of the electronic ballast industry in the late 1970s, LBL contracted with three small companies to produce early
commercial models. The intent of this early effort was to accelerate the
availability of electronic ballasts by demonstrating their energy efficiency and reliability in typical building environments. Later work at LBL helped
improve the quality of the ballasts and validate the potential for energy savings from dimming. The current market share of electronic ballasts is 23% of all ballasts sold. More recent LBL efficient-lighting breakthroughs are now
entering the market, including thermally efficient fluorescent fixtures (see
CBS News, Winter, 1993, p. 4).
Seeing Windows Through
Although largely invisible to the human eye, windows with advanced coatings
offer a one-third efficiency advantage over ordinary double-glazed windows
by selectively blocking unwanted heat gain or loss. LBL's research began
with researchers studying the heat-transfer mechanisms in windows and
identifying technical opportunities for reducing those gains and losses. Based
on the findings, LBL became a pioneer in the commercialization of "low-
emissivity" windows, awarding subcontracts to several firms to develop
prototype coatings and new low-cost thin-film deposition processes. The
coatings' performance was tested at LBL and new computer models were
developed to determine the best use of the coatings in the overall window
system. By the mid-1980s, virtually every major manufacturer was offering
low-E windows. LBL developed design concepts using two low-E coatings
and new gas fills that would cut energy losses by an additional 50% compared
to conventional low-E glazing. LBL then teamed with five manufacturers and
suppliers (Andersen, Cardinal IG, Owens-Corning Fiberglas, Pella, and
Southwall Technologies) and the Bonneville Power Administration in a
program to convert the window concept into commercial prototypes. Within
two years of this demonstration project, one of the participating manufacturers
introduced the first commercial "superwindow," combining low-E coatings
with energy-saving gas fills. The current market share of low-E glazings is
36% of all windows sold. The window industry's National Fenestration
Rating Council recently adopted LBL's computer model (Window 4.1) as the
definitive method of estimating window performance and creating energy
labels for windows (see CBS News, Spring 1994).
Setting the Standard for Energy Efficiency
LBL has become the national center for appliance standards analysis. Its
program provides the technical, economic, utility, and manufacturer-impact
analyses on which DOE bases mandatory standards that now apply to all
major U.S. appliances and residential space-conditioning systems. In addition
to technology-oriented research, the LBL program has provided pivotal
support for understanding how the market functions and how certain market
barriers to energy efficiency warrant the application of legislative measures
such as standards and labeling. The current market share for standards is
virtually all applicable equipment sold.
Tools for Building Designers
LBL's DOE-2 program is a powerful computer-based design tool for
evaluating the energy implications of complex building design alternatives.
Beginning in the mid-1970s, LBL worked with Los Alamos and Argonne
national laboratories to develop the predecessor to DOE-2. The objective was
an hourly whole-building energy analysis program that could simulate all
building types in all climates and that was unbiased, well-documented, and
open to public scrutiny. A private company, Consultants Computation
Bureau, assisted with interface development and programming. Continued
improvements have been supported by DOE, various utilities, and the Electric
Power Research Institute (EPRI). A number of companies have converted
DOE-2 into a PC-based program, or developed and marketed ancillary
software. There are 1,000 users today, in 42 countries. DOE-2 is used in the
design of about 5% of all commercial buildings by floorspace, and users
report that it enables them to routinely identify an extra 20% energy-savings
opportunity. The program has also been the basis of four major standards:
California Title 24, the Building Energy Performance Standard, and the
DOE/ASHRAE 90.1 and 90.2 standards for commercial and residential
buildings.
Clearing the (Indoor) Air
Some energy-saving measures can create indoor air quality problems unless
properly conceived and implemented. Mitigating these problems can waste
energy, for example, through excess ventilation without heat recovery. The
Center for Building Science has studied the "sick-building syndrome" in
depth and houses one of the world's premier research groups on the
environmental effects of indoor radon--the second largest cause of lung
cancer in the U.S. Its research has uncovered basic insights into how radon
gas from the soil gets into homes, helping craft national policy
recommendations for more effectively and efficiently identifying regions
where houses with elevated concentrations can be found, and once found, to
utilize energy-efficient remediation techniques (see CBS News,
Spring 1994;
Summer 1994).
LBL's program has helped stimulate technologies and strategies for measuring and controlling indoor air pollution efficiently, including low- emission building materials and appliances, heat-recovery ventilation systems, blower-door technology (for testing air leakage in buildings), and energy- efficient radon control methods. A notable example: LBL's innovative "airvest" system promises to reduce spray-booth worker exposure to pollutants substantially while cutting ventilation energy costs in half (see CBS News, Winter 1993, p. 7). Researchers have also developed passive samplers for indoor air quality (for example, the formaldehyde-based air samplers now sold by Air Quality Research in North Carolina) and contributed to twelve national ASHRAE and ASTM standards pertaining to ventilation and air quality for the built environment.
President Clinton holds up a compact fluorescent lamp on Earth Day 1994. Early work by LBL on the electronic ballast helped pave the way for this technology.
On the Horizon
Future directions in the lighting area include developing more efficient light
sources such as the sulfur lamp, "tuning" the light spectrum to optimize
visibility and reduce energy use, and analyzing market transformation
programs for technologies like residential fixtures. LBL's advanced coating
technology will lead to "smart windows" whose dynamic coatings change the
windows from clear to reflective. Other work in progress updates existing
efficiency standards, expands them into nonresidential end-use areas (such as
thermal distribution, small motors, lighting ballasts, and HID lamps). The
cooperative development of PowerDOE, a PC-based, user-friendly interface
for DOE-2, and an expert system module called the Building Design Advisor
(BDA, is continuing in a joint private/public collaboration with support from
EPRI, utilities, the California Energy Commission, and DOE.
--Evan Mills
For a full copy of the report, From the Lab to the Marketplace. . ., please click here.
Evan Mills
Center for Building Science
(510) 486-6784; (510) 486-5394 fax