Peak demand savings from daylighting in commercial buildings
In many regions in the US, load management and peak demand issues are of greater importance to utility planners than are reductions in energy consumption. Proper daylight utilization in commercial buildings can substantially reduce peak demand and increase energy savings. However, to determine optimum design strategies for controlling electrical demand, it is first necessary to understand the often conflicting impacts of fenestration on lighting and cooling loads. We use an hour-by-hour energy simulation model (DOE-2.1B) to evaluate peak demand components and net effects in daylighted and nondaylighted buildings. More than 5000 parametric simulations were generated for prototypical office building modules containing both horizontal and vertical glazing, and located in 16 US cities. From these simulations we draw conclusions about the effects of daylighting on peak demand for a range of climate types, orientations, fenestration areas, glazing shading coefficients and visible transmittances, U-values, lighting power densities, and lighting control strategies. Results for Los Angeles are briefly compared to results for the climatic extremes of Lake Charles, Louisiana (cooling-dominated), and Madison, Wisconsin (heating-dominated), and then discussed in detail. We also briefly describe studies in progress to measure peak load impacts of fenestration using an outdoor test facility and occupied buildings.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6773243
- Report Number(s):
- LBL-18126; CONF-840819-10; ON: DE84016880
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cooling energy and cost savings with daylighting in a hot and humid climate
Impact of fenestration on energy use and peak loads in daylighted commercial buildings
Related Subjects
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
320603 -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Public Utilities-- (1980-)
BUILDINGS
COMMERCIAL BUILDINGS
DAYLIGHTING
ELECTRIC UTILITIES
LOAD MANAGEMENT
MANAGEMENT
OPENINGS
ORIENTATION
PARAMETRIC ANALYSIS
PEAK LOAD
POWER DEMAND
PUBLIC UTILITIES
WINDOWS