Cooling Load Factors: luminaire_heat_fractions
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 | luminaire category | radiative fraction max (dimensionless) | radiative fraction min (dimensionless) | space fraction max (dimensionless) | space fraction min (dimensionless) |
|---|---|---|---|---|---|---|
| luminaire_heat_fractions | luminaire_01 | Recessed fluorescent luminaire without lens | 0.68 | 0.48 | 0.74 | 0.64 |
| luminaire_heat_fractions | luminaire_02 | Recessed fluorescent luminaire with lens | 0.73 | 0.61 | 0.5 | 0.4 |
| luminaire_heat_fractions | luminaire_03 | Downlight compact fluorescent luminaire | 1 | 0.95 | 0.24 | 0.12 |
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below_grade_floor3 rowsbelow_grade_wall3 rowscomputer_heat_gain3 rowsconstruction_material3 rowscooking_electric_hooded3 rowscooking_electric_unhooded3 rowscooking_gas_hooded3 rowscooking_gas_unhooded3 rowsglazing_optical3 rowsheat_gain_rad_conv3 rowslighting_power_density3 rowsmonitor_heat_gain3 rows