Commercial Building Toplighting: Energy Saving Potential and Potential Paths Forward

Abstract

This report was prepared as an account of work sponsored by an agency of the United States Government. None of the following entities makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights: a) the United States Government, b) any agency, contractor, or subcontractor thereof, and c) any of their respective employees. Any use the reader makes of this report, or any reliance upon or decisions to be made based upon this report, are the responsibility of the reader. The reader understands that no assurances can be made that all relevant factors have been identified.

A review study on the application of the fibre optic daylighting system in Malaysian buildings

“…In fact, many studies have been conducted on different methods of bringing outside illuminance to the inside of buildings as demonstrated by O'Connor et al [4], Krarti et al [5], Lawrence and Roth [6] and Han and Kim [3] who study and investigate the methods of daylighting.…”

Advanced Energy Retrofit Guide: Practical Ways to Improve Energy Performance; Grocery Stores (Revised) (Book)

“…For detailed practical guidance on daylight design in grocery stores, refer to the IES Lighting Handbook (DiLaura et ), Architectural Lighting (Egan, Olgyay 2002 and Commercial Building Toplighting: Energy Savings Potential and Potential Paths Forward (Lawrence and Roth 2008) . Note that daylight levels may vastly exceed the light levels suggested for grocery stores by the IES .…”

“…Factors that can affect your toplighting device selection include: budget, architectural and aesthetic needs, available roof area, ceiling plenum depth and construction, ceiling height, and impacts to envelope performance (solar heat gain and insulation) . To select the toplighting device that best meets your needs and addresses your existing building conditions, refer to Commercial Building Toplighting (Lawrence and Roth 2008) . For budgets or existing spaces/ceiling plenums that cannot incorporate skylights, consider the use of light tubes, especially in prep areas like delis, bakeries, and meat/seafood counters that often have existing suspended ceilings .…”

“…Typically speaking, the higher the ceiling height, the fewer skylights required for meeting your ambient lighting needs (and the further apart they may be spaced) . Refer to Commercial Building Toplighting (Lawrence and Roth, 2008) for diagrams illustrating how ceiling height, skylight design and distribution, and aisle placement and orientation work together to create an effective toplighting design .…”

“…Note: For retrofits where the resulting skylight-to-floor ratio is 5% or less, losses are typically small relative to energy savings from reduced lighting loads . (Lawrence and Roth 2008) Minimize sidelighting on west-and east-facing façades where solar heat and glare are hardest to control.…”