Cooling Load Factors: lighting power density
lpd 031 to lpd 040
ASHRAE cooling load calculation factors — people heat gain, lighting power density, luminaire heat fractions, motor efficiency, cooking/warewashing appliance heat gain, office/computer equipment heat gain, glazing optical properties, radiative/convective fractions, surface solar absorptance, wall and roof conduction time series (CTS), construction material layer properties, radiant time series (RTS), zone characteristics, and below-grade heat transfer coefficients. Source: ASHRAE Handbook Fundamentals 2021, Chapter 18.
| factor type | item id | lpd W per m2 (W/m2) | space type |
|---|---|---|---|
| lighting power density | lpd 031 | 8 | Enclosed and ≤23.2 m² |
| lighting power density | lpd 032 | 12.7 | Stacks |
| lighting power density | lpd 033 | 7.1 | Enclosed and >23.2 m² |
| lighting power density | lpd 034 | 6.6 | Open plan |
| lighting power density | lpd 035 | 8.6 | Detailed manufacturing area |
| lighting power density | lpd 036 | 1.6 | Parking Area, Interior |
| lighting power density | lpd 037 | 8.2 | Equipment room |
| lighting power density | lpd 038 | 7.6 | All other classrooms/lecture halls/ |
| lighting power density | lpd 039 | 17.9 | Pharmacy Area |
| lighting power density | lpd 040 | 15.3 | Extra-high-bay area |
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