EnergyPlus schedules and daylight savings time

asked 2017-03-17 11:12:23 -0500

Elaine Hale's avatar

updated 2017-03-18 09:01:40 -0500

EnergyPlus automatically interprets schedules as being in local time, and therefore shifting with daylight savings time. This is usually the correct occupant-driven behavior. However, there are situations when it would be more natural to input a schedule in standard time. For example, the California TDV (or any other time series schedule derived from grid interactions) is more naturally expressed as a basic standard-time time series. Might EnergyPlus add a new flag or Schedule object to allow for this kind of input? Alternatively, OpenStudio could (or maybe already does?) support this modeler-friendly feature.

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My understanding is that E+ applies daylight saving time when either of these conditions are met a) if epw file has Daylight Saving Start Date and Daylight Saving End Date in the line HOLIDAYS/DAYLIGHT SAVINGSand input field Use Weather File Daylight Saving Period in RunPeriod object in idf is set to Yesb) Or epw may not have daylight saving period but idf has RunPeriodControl:DaylightSavingTime object.

Chandan Sharma's avatar Chandan Sharma  ( 2017-03-20 06:59:31 -0500 )edit