Constructions

Introduction

TODO: add an outline of the tutorial

The building

We’ll use the same building as in the previous tutorial.

>>> from geomeppy import IDF
>>> IDF.setiddname("C:/EnergyPlusV9-1-0/Energy+.idd")
>>> idf = IDF("C:/EnergyPlusV9-1-0/ExampleFiles/Minimal.idf")
>>> idf.epw = "USA_CO_Golden-NREL.724666_TMY3.epw"
>>> idf.add_block(
      name='Two storey',
      coordinates=[(10,0),(10,5),(0,5),(0,0)],
      height=6,
      num_stories=2,
    )
>>> idf.add_block(
      name='One storey',
      coordinates=[(10,5),(10,10),(0,10),(0,5)],
      height=3,
    )
>>> idf.intersect_match()
>>> idf.set_default_constructions()
>>> idf.set_wwr(0.25, construction="Project External Window")

Viewing constructions

Next we’ll take a look at some of the constructions.

>>> for c in idf.idfobjects["CONSTRUCTION"]:
        print(c)
CONSTRUCTION,
    Project Wall,             !- Name
    DefaultMaterial;          !- Outside Layer
CONSTRUCTION,
    Project Partition,        !- Name
    DefaultMaterial;          !- Outside Layer
CONSTRUCTION,
    Project Floor,            !- Name
    DefaultMaterial;          !- Outside Layer
CONSTRUCTION,
    Project Flat Roof,        !- Name
    DefaultMaterial;          !- Outside Layer
CONSTRUCTION,
    Project Ceiling,          !- Name
    DefaultMaterial;          !- Outside Layer
CONSTRUCTION,
    Project Door,             !- Name
    DefaultMaterial;          !- Outside Layer
CONSTRUCTION,
    Project External Window,    !- Name
    DefaultGlazing;           !- Outside Layer

Ah. So what do these “DefaultMaterial” and “DefaultGlazing” look like?

>>> idf.getobject("MATERIAL", "DefaultMaterial")
MATERIAL,
    DefaultMaterial,          !- Name
    Rough,                    !- Roughness
    0.1,                      !- Thickness
    0.1,                      !- Conductivity
    1000,                     !- Density
    1000,                     !- Specific Heat
    0.9,                      !- Thermal Absorptance
    0.7,                      !- Solar Absorptance
    0.7;                      !- Visible Absorptance

>>> idf.getobject("WINDOWMATERIAL:SIMPLEGLAZINGSYSTEM", "DefaultGlazing")
WINDOWMATERIAL:SIMPLEGLAZINGSYSTEM,
DefaultGlazing,           !- Name
2.7,                      !- UFactor
0.763,                    !- Solar Heat Gain Coefficient
0.8;                      !- Visible Transmittance

Well the window looks OK, but those “DefaultMaterial”s should definitely be replaced with something better.

Importing constructions

We can import constructions from another IDF. For this tutorial, we’ll fetch the ones from “WindowTestsSimple.idf”.

>>> src_idf = IDF("C:/EnergyPlusV9-1-0/ExampleFiles/WindowTestsSimple.idf")
>>> copy_constructions(source_idf=src_idf, target_idf=idf)

Now we can assign some of those constructions to our IDF.

>>> for wall in idf.getsubsurfaces("wall"):
        wall.Construction_Name = "EXTERIOR"
>>> for roof in idf.getsubsurfaces("roof"):
        roof.Construction_Name = "ROOF31"
>>> for floor in idf.getsubsurfaces("floor"):
        floor.Construction_Name = "FLOOR38"

And run the simulation.

>>> idf.run(output_directory="tests/tutorial")

Summary

TODO: add a summary of the contents