Increasing fixture efficiency with convective venting in compact fluorescent downlights

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Energy Engineering; (United States)

OSTI ID:7205720

Siminovitch, M; Zhang, C ^[1]

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1. Lawrence Berkeley Lab., CA (United States). Lighting Systems Research Group

Air stratification within lamp compartments can produce highly constricted thermal environments in many compact fluorescent recessed downlights. Because compact fluorescent lamps are highly sensitive to ambient temperature, a constructed thermal environment can reduce the lamp's light output. Passive ventilation through the lamp compartment into the surrounding plenum can reduce thermal stratification within the fixture housing, resulting in cooler lamp temperatures and a corresponding increase in light output of 15 percent to 20 percent. Passive ventilation can be achieved by using appropriately located venting apertures that promote a convective flow through the compartment.

• OSTI ID: 7205720
• Journal Information: Energy Engineering; (United States), Journal Name: Energy Engineering; (United States) Vol. 90:6; ISSN EENGDO; ISSN 0199-8595
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
AIR FLOW
COOLING
EFFICIENCY
ENERGY EFFICIENCY
FLUID FLOW
FLUORESCENT LAMPS
GAS FLOW
LIGHT BULBS
TEMPERATURE DEPENDENCE
VENTILATION