[Yi]

Dear Rose,

The way that @@Outside_Air@@ was used in the example is indeed relating to the EP-Macro functions (see E+ docs here: http://apps1.eere.energy.gov/buildings/e...ograms.pdf). Basically, the line below defines a macro (using an EP-Macro syntax) named "FA_RATE" to represent the outside air rate to be filled in later by jEPlus.

Code:

!- Outside airflow rate, m3/s/person:
!- Sensible range between 0.0~0.1
##set1 FA_RATE @@Outside_Air@@
...

"FA_RATE" is then used in several places (see below) in the model file. Although you can insert the search tag "@@Outside_Air@@" directly at those places as required, using a macro is a cleaner solution.

Code:

 HVACTemplate:Zone:FanCoil,
   SPACE1-1,                !- Zone Name
   All Zones,               !- Template Thermostat Name
   autosize,                !- Supply Air Maximum Flow Rate {m3/s}
   ,                        !- Zone Heating Sizing Factor
   ,                        !- Zone Cooling Sizing Factor
   flow/person,             !- Outdoor Air Method
   FA_RATE[],               !- Outdoor Air Flow Rate per Person {m3/s}
   0.0,                     !- Outdoor Air Flow Rate per Zone Floor Area {m3/s-m2}
   0.0,                     !- Outdoor Air Flow Rate per Zone {m3/s}
   ...

Regards,

Yi