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How are lighting schedules applied in EnergyPlus?

asked 2015-03-31 10:46:15 -0500

Alex Vlachokostas gravatar image

updated 2015-07-10 09:07:06 -0500

Hello, what does the following E+ snippet of code mean? "Schedule:Compact, LIGHT-SCHED, Fraction, Through: 12/31, For: Weekdays, Until: 05:00, 0.05, Until: 07:00, 0.1, Until: 08:00, 0.3, Until: 17:00, 0.9, Until: 18:00, 0.7, Until: 20:00, 0.5, Until: 22:00, 0.3, Until: 23:00, 0.1, Until: 24:00, 0.05,"

For example: "Until: 17:00, 0.9" does it mean that from 8:00 to 17:00 the lights are on for 90% of the time OR that the office uses 90% of the maximum wattage of lights during the whole time?

Thank you.

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answered 2015-03-31 11:07:37 -0500

updated 2015-03-31 11:15:57 -0500

If the Lights object uses this schedule, then the load (W, W/ft2, W/person) will be multiplied by these values. From the I/O document:

Field: Schedule Name

The name of the schedule that modifies the lighting power design level (see Design Level Calculation Method field and related subsequent fields). The schedule values can be any positive number. The electrical input for lighting in a particular timestep is the product of the design level and the value of this schedule in that timestep. If the design level is the maximum lighting power input the schedule should contain values between 0.0 and 1.0.

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Asked: 2015-03-31 10:46:15 -0500

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Last updated: Mar 31 '15