Hi,
I was just wandering if the power consumption of ballasts should be included for Part L compliance and EPC simulations?
Regards
Ross
Include Luminaire Ballasts
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RossThompson87
- VE Professor
- Posts: 202
- Joined: Mon Feb 13, 2012 8:56 am
Re: Include Luminaire Ballasts
Hi Ross,
Yes, it should. The following text is taken from the iSBEM user manual.
NB: The total wattage value that is entered into iSBEM is for the lighting system, i.e., it should include the luminaires and ballasts (control gear).
NB: The design illuminance, in lux, is that for which the full lighting design has been carried out. The maintained illuminance at the end of the lamp life and before cleaning of the luminaires should not be less than the design illuminance. This value will be used, along with the total wattage value, in order to determine the consequent power density values associated with the lighting system used in W/m2 per 100 lux. This value will, in turn, be used to calculate the electrical consumption of an equivalent system which delivers the illuminance levels specified in the database. The calculated lighting energy consumption will be higher or lower than you expect depending on whether the design illuminance entered is higher or lower than the database illuminance for the activity.
Changing the activity in a zone will change the corresponding illuminance retrieved from the Activity database, which would be reflected in both the actual and notional buildings. You can download the NCM Activity Database from the NCM website if you wish the view the illuminance values associated with each activity type.
Yes, it should. The following text is taken from the iSBEM user manual.
NB: The total wattage value that is entered into iSBEM is for the lighting system, i.e., it should include the luminaires and ballasts (control gear).
NB: The design illuminance, in lux, is that for which the full lighting design has been carried out. The maintained illuminance at the end of the lamp life and before cleaning of the luminaires should not be less than the design illuminance. This value will be used, along with the total wattage value, in order to determine the consequent power density values associated with the lighting system used in W/m2 per 100 lux. This value will, in turn, be used to calculate the electrical consumption of an equivalent system which delivers the illuminance levels specified in the database. The calculated lighting energy consumption will be higher or lower than you expect depending on whether the design illuminance entered is higher or lower than the database illuminance for the activity.
Changing the activity in a zone will change the corresponding illuminance retrieved from the Activity database, which would be reflected in both the actual and notional buildings. You can download the NCM Activity Database from the NCM website if you wish the view the illuminance values associated with each activity type.