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EnergyPlus Warning: Schedule: missing day types

asked 2018-01-06 05:30:51 -0600

Jenny's avatar

updated 2018-01-09 08:06:05 -0600

Some warnings are displayed in my simulation in EnergyPlus. First of all, I am wondering if I can ignore them, since no errors are present or I should check my simulation beacuse warnings may affect it.

In the case these warnings are to be considered : in the section Schedule:Compact I set for example the functioning of some electrical equipment. They are working only on WeekDays, during August and weekends I set them equal to zero. Here it is attached an example of what I performed: C:\fakepath\electric_equipment.PNG

The warning is the following: " ProcessScheduleInput: Schedule:Compact="ELECTRIC EQUIPMENT" has missing day types in Through=7/31 * ~~~ * Last "For" field=FOR: WEEKENDS * ~~~ * Missing day types="Holiday","SummerDesignDay","WinterDesignDay","CustomDay1","CustomDay2" * ~~~ * Missing day types will have 0.0 as Schedule Values" ".

Should I specify the functioning also in these days? I am setting up the operation only in the weekdays so I though it was enough.

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answered 2018-01-07 21:36:22 -0600

updated 2018-01-07 21:38:00 -0600

I agree with Avi, for an annual simulation if you specified your schedule to operate the way you intend, the warning is just alerting you that these other schedule types will have values set to zero. If you are autosizing HVAC equipment at all, you should create a separate Summer Design Day, based on the climactic data you can find in Chapter 14 of ASHRAE Handbook of Fundamentals (or here: If you don't, you will likely get high unmet cooling load hours. Or you can hard-size values.

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answered 2018-01-06 09:57:15 -0600

Avi's avatar

updated 2018-01-06 09:58:08 -0600

In my opinion you shouldn't worry too much about that warning maybe aside of one minor issue: You might want to enter a value for Summer Design Day since it happens usually in the period that your schedule value is not 0 and for now it is assigned 0 as it reads. Leaving it as it is will affect sizing. You should consider changing it if you believe that the sizing will be significantly changed if you don't.

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Yes but what makes me wonder is if the SummerDesignDay refers to the Weatherfile and if it is linked to it. If yes, (imposing a certain begin day of the month in the section RunPeriod) it can happen, for example, that the SummerDesignDay (or WinterDesignDay etc..) falls in a Weekend and this goes against my settings in the Schedule:Compact. Instead, I though that by imposing a condition such as "Weekends" or "Weekdays" would take into account the functioning of my electrical equipment in a more general way.

Jenny's avatar Jenny  ( 2018-01-06 16:40:46 -0600 )edit

To my best knowledge Design Days are nor weekdays or weekends. They are unique days used for sizing. Usually people choose for summer max load or something similar and for winter minimal or sometimes zero load. You can read about days in E+ in the Input Output Reference.

Avi's avatar Avi  ( 2018-01-06 23:59:21 -0600 )edit

Thank you a lot for your help!

Jenny's avatar Jenny  ( 2018-01-20 04:04:21 -0600 )edit

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Asked: 2018-01-06 05:30:51 -0600

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Last updated: Jan 07 '18