Difference between Energy+.idd (from NREL/EnergyPlus) and ProposedEnergy+.idd (from NREL/OpenStudio)

diff_eplus_idd.md

Differences

• \min-fields is missing in a lot of cases (that could be brought over to E+ without too much trouble)

• \default and \required-field on a bunch of fields (which isn't that big of a deal, and could be brought over to E+ too), eg Boiler:Steam

• ScheduleTypeLimits is mising some of our keys like ClothingInsulation (that could be brought over to E+ too, but IDF editor would need update to handle them)

• max-fields was added in our ProposedEnergy+.idd for a few cases like Schedule:Year, \max-fields 267

• Our parser chokes on a couple of \note that have special characters, and some fields like N13, \field Young's modulus (' is problematic) or \note no spaces or other special characters (-,+,/,\) allowed in name

• Schedule:File is \url-object

• Some objects actually do not have the \begin-extensible marker, like MaterialProperty:PhaseChange (actually, pretty much ALL MaterialProperty:XXX at least) (but that could be handled in parsing, and also added to the E+ side). So we need to also add \extensible:2 and \max-fields 34 to limit the number of extensible fields (that can be inferred from parsing too)

• A few units aren't understood by our parser (which can be fixed): either compound units (W/((m3/s)-Pa), or (gal/min)/(Btu/h)), or stuff like \units W/m2 or deg C

• Our idd doesn't have the \required-field on a few extensible groups (but other do, so not sure if it works or not), one example is Vertex fields (eg in Shading:Site:Detailed)

• A few \min-fields differences in values, eg HeatPump:PlantLoop:EIR:Cooling (E+ has 14, I calculated 15)

• We do not understand \object-list was the reference is from a \reference-class-name validPlantEquipmentTypes

  A2 , \field Equipment 1 Object Type
       \type object-list
       \object-list validPlantEquipmentTypes

Examples

Regular extensible

 A4  , \field Time 1
       \begin-extensible
       \note "until" includes the time entered.
       \units hh:mm
 N1  , \field Value Until Time 1
 A5  , \field Time 2
       \note "until" includes the time entered.
       \units hh:mm
 N2  , \field Value Until Time 2
 A6  , \field Time 3
       \note "until" includes the time entered.
       \units hh:mm

Variant:

  N2,  \field Value 1
       \begin-extensible
       \default 0.0
        N3,N4,         N5,N6,N7,N8,         N9,N10,N11,N12,      N13,N14,N15,N16,     N17,N18,N19,N20, \note fields as indicated
  N21,N22,N23,N24,

A couple of weird things:

\begin-extensible is placed on the second occurrence

Site:SpectrumData,

  A2, \field Spectrum Data Type
      \required-field
      \type choice
      \key Solar
      \key Visible
  N1, \field Wavelength
      \type real
      \units micron
  N2, \field Spectrum
      \type real
  N3, \field Wavelength
      \type real
      \units micron
  N4, \field Spectrum
      \type real
  N5, \field Wavelength
      \begin-extensible
      \type real
      \units micron
  N6, \field Spectrum
      \type real
  N7, N8,       \note fields as indicated

FluidProperties:GlycolConcentration (NREL/EnergyPlus#7244)

FluidProperties:GlycolConcentration,
       \memo glycol and what concentration it is
  A1,  \field Name
       \required-field
       \note In EnergyPlus IDD 9.1.0, reference FluidAndGlycolNames is added but causing problems because we expect both
       \note FluidProperties:Name and FluidProperties:GlycolConcentration to have the same name
  A2,  \field Glycol Type