I'm currently writing a measure that allows the user to add an occupancy sensor to a space and was wondering the best way to implement this? Is it best to model it as a reduction in the lighting schedule? Or is there a better way to do this?
Here is a measure that models occupancy sensors by reducing the lighting power density of certain space types by the percentage allowed by ASHRAE 90.1-2010 Table 9.6.2 and Addendum cg Table G3.1(g).
If you intend for your modeling method to comply with Appendix G you can modify the lighting schedule, as long as "credible technical documentation of the modifications" is provided to the rating authority.
Table G3.2 also provides percentages for lighting power reductions for different controls including occupancy.
My preference for lighting and equipment controls is to change the schedule; for the following reasons.
In OpenStudio a third option other than the load or schedule, is the load instance multiplier.
Hmmmm, the Scout occupancy sensor measure reduces LPD. Maybe we need to revisit.
Is it possible to specify which thermal zone or spaces will be affected by this occupancy sensor ?
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