save E+ output as IDF

[dataman-py]

Hi

i want to make a dataset from one idf as follow:

1- load idf
2- change some parameters
3- run it
4- give E+ output
5- save changes as new idf

can anyone help me?

[santoshphilip]

I think this should be easy with eppy.

1- load idf

import eppy
fname = "/Applications/EnergyPlus-24-1-0/ExampleFiles/Minimal.idf"
wfile = "/Applications/EnergyPlus-24-1-0/WeatherData/USA_CA_San.Francisco.Intl.AP.724940_TMY3.epw"
idf = eppy.openidf(fname, epw=wfile)

2- change some parameters

see tutorial
https://eppy.readthedocs.io/en/master/Main_Tutorial.html on how to change parameters

3- run it

see this page on running it https://eppy.readthedocs.io/en/master/runningeplus.html#Make-idf.run()-work-like-EPLaunch

4- give E+ output

Read the E+ output https://eppy.readthedocs.io/en/master/Outputs_Tutorial.html

5- save changes as new idf

idf.save(newfilename)

[santoshphilip]

I am not sure what you mean by

4- give E+ output

[dataman-py]

thanks

E+ output is in .htm formart
can I save it as idf like step 5 ( idf.save(new.htm)) ????

[santoshphilip]

You cannot save the htm as idf.
You can read data from the htm and use that data to make changes to the idf.

[dataman-py]

thanks

how can i check the changes?

[dataman-py]

i want to save new value generated by E+ as idf file

[santoshphilip]

Can you give an example.
I am not fully understanding what you are attempting

[dataman-py]

@santoshphilip
yes

for example
in an idf people are 10 and we change it to 15 and run E+
based on these changes other parameters after running will change

I want to save these changes in a new idf

[santoshphilip]

What you are describing would work something like this:

peoples = idf.idfobjects['peoples']
people = peoples[0] # grab the 1st peeople in the list

print(people)

PEOPLE,
    Some People,              !- Name
    ,                         !- Zone or ZoneList or Space or SpaceList Name
    ,                         !- Number of People Schedule Name
    People,                   !- Number of People Calculation Method
    10,                       !- Number of People
    ,                         !- People per Floor Area
    ,                         !- Floor Area per Person
    <snip - start>
    <removed some data here>
    <snip - end>
    ,                         !- Ankle Level Air Velocity Schedule Name
    15.56,                    !- Cold Stress Temperature Threshold
    30;                       !- Heat Stress Temperature Threshold


people.Number_of_People = 15

print(people )

PEOPLE,
    Some People,              !- Name
    ,                         !- Zone or ZoneList or Space or SpaceList Name
    ,                         !- Number of People Schedule Name
    People,                   !- Number of People Calculation Method
    15,                       !- Number of People
    ,                         !- People per Floor Area
    ,                         !- Floor Area per Person
    <snip - start>
    <removed some data here>
    <snip - end>
    ,                         !- Ankle Level Air Velocity Schedule Name
    15.56,                    !- Cold Stress Temperature Threshold
    30;                       !- Heat Stress Temperature Threshold

idf.saveas("newfile.idf")

Note that we are not using the htm file in this process. Your example does not ask for data from the htm file

[dataman-py]

thanks for response

but it is not my solution

no problem

I will try more to solve it

thanks