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Temperature setpoints in the IDF file

asked 2019-11-27 21:29:31 -0600

MarocoSC gravatar image

updated 2019-11-28 04:20:36 -0600

I want to modify an IDF model based on this description: ""

As for the occupancy schedules, the buildings are considered occupied during weekdays from 6:00 a.m. to 10:00 p.m., on Saturdays from 9:00 a.m. to 5:00 p.m., and on Sundays/holidays the buildings are considered unoccupied. Building envelope, roof, wall and window u-values vary among different locations. The baseline HVAC operation setpoint conditions are non-variable in all locations with the cooling setpoint being 24 °C for the occupied, and 26.7 °C for the unoccupied hours, and the heating setpoint 21 °C and 15.6 °C for the occupied and unoccupied hours, respectively.

However, I am not specialist in an engineering field. Therefore, I do not know where I should put these temperatures. In the Schedule:Compact class, the heating and cooling temperature setpoints for occupied and unoccupied hours should be change during the optimization process. So, I think, I cannot put them in the Schedule:Compact class. Because, according to the description, these tempraturs are non-variable

in the IDF file I did this:

  Schedule:Compact,
    CLG-SCHED,               !- Name
    TEMPERATURE,             !- Schedule Type Limits Name
    Through: 12/31,          !- Field 1
    For: Weekdays,           !- Field 2
    Until: 6:00,24.00,       !- Field 3
    Until: 22:00,24.00,      !- Field 5
    Until: 24:00,24.00,      !- Field 7
    For: Saturday Holidays,  !- Field 9
    Until: 9:00,26.70,       !- Field 10
    Until: 17:00,26.70,      !- Field 12
    Until: 24:00,26.70;      !- Field 14

  Schedule:Compact,
    HTG-SCHED,               !- Name
    TEMPERATURE,             !- Schedule Type Limits Name
    Through: 12/31,          !- Field 1
    For: Weekdays,           !- Field 2
    Until: 6:00,21.00,       !- Field 3
    Until: 22:00,21.00,      !- Field 5
    Until: 24:00,21.00,      !- Field 7
    For: Saturday Holidays,  !- Field 9
    Until: 9:00,15.60,       !- Field 10
    Until: 17:00,15.60,      !- Field 12
    Until: 24:00,15.60;      !- Field 14

I am not sure if it is correct or not

What does "The baseline HVAC operation setpoint conditions" mean?

In the IDF file, does the field number (Field x) refers to something, why Field 4 is not there?

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answered 2019-12-02 06:01:33 -0600

Avi gravatar image

You can read about the compact schedule in EnergyPlus 9.2- Input Output Reference.

Missing fields are when there are two fields in a row separated by comma. The text after the exclamation mark is just a remark.

I believe that you can safely change the temperatures in the Compact Schedules as your cited text, up here, states that the temperatures are non-variable. Anyway, if you could post a link to your IDF file I could make sure that it is safe.

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Could you please check these IDF files. I have attached both, the original and modified.

Original:

Modified:

The model should be based on the description in this paper: "Rethinking HVAC temperature setpoints in commercial buildings: The potential for zero-cost energy savings and comfort improvement in different climates". I am not sure if I can attach it here. If you do not mind, I can send it by the email.

MarocoSC gravatar imageMarocoSC ( 2019-12-04 00:16:57 -0600 )edit

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Asked: 2019-11-27 21:29:31 -0600

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Last updated: Dec 02