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Daylighting
and Productivity Studies
Heschong
Mahone Group completed studies researching the relationship between human
performance and building design on
behalf of the California Energy Commission's Public Interest Energy Research
(PIER) program.
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Sidelighting
Photocontrols Field Study
HMG has conducted the first large-scale US
field study of energy savings from
daylight-responsive lighting controls
(photocontrols) in commercial buildings
that are lit by windows (sidelit spaces).
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Time Dependant
Valuation of Energy Efficiency
 Past development and
revisions of the Title 24 energy standards
were based on electricity and natural gas
costs that did not account for seasonal or
time-of-use patterns. Pacific Gas &
Electric Company (PG&E) sponsored a study
that investigated the feasibility of using
a more accurate energy costing analysis
which accounts for variations in cost
related to time of day, seasons, geography
and fuel type.
The study culminated in a proposal to
revise the performance method programs to account for these variations. An
economic model was developed and utilized to guide these revisions. The
proposed Title 24 standards for 2005 embrace this methodology. The
standards now place more value on the installation of features that affect
peak demand. In the hotter climates in California, this demand is quite
significant.
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Skylighting
Design Guidelines & Software: SkyCalc®
 For
the California Energy Commission's Public Interest Energy Research
Program (PIER), HMG developed design guidelines for modular
skylights integrated in suspended ceilings, along with a research report
that summarizes the current construction practices for designing and
installing modular skylights in suspended ceiling assemblies.
For the PIER program, HMG also developed a research report on the
effectiveness of lay-in ceiling insulation in commercial buildings in
California.
For Southern California Edison, we developed the Skylighting Guidelines,
an updated and expanded edition of the award-winning Skylight Handbook. We
have also developed SkyCalc™, an Excel-based program that identifies the
optimum skylighting design for a building, and compares the net energy cost
savings using a variety of electric lighting control strategies.
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PIER
Skylight Photometry
Photometric information, a description of
the angular distribution of light from a source, is the basis of
predicting how that light source shall light a space. Photometrics
describe the directionality and the magnitude of light from a given
lighting source. Almost all electric light fixtures sold in the United
States have a photometric report. This photometric information allows
one to calculate how the light fixtures distribute light in a room. In
the past, measured photometric information was not readily available for
skylights. As a result, lighting designers do not have the same
predictive tools for designing with skylights as they do for electric
lighting.
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PIER
Lighting Research Program
(PIER LRP) Lighting R&D/ Codes
Scoping Study
For
the California Energy Commission's PIER
Lighting Research Program (LRP), HMG
provided critical evaluation of the energy
efficiency potential, savings, and codes
and standards connections for various
lighting technologies developed through
the program. The goal of this project was
to determine how the PIER Lighting
Research Program can best translate its
successes into workable code and standards
proposals. The emphasis was to identify
efforts that are likely to have the
largest energy savings and demand
reduction potential.
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