Hi There,
Does anyone know of a good way to calculate TEDI (thermal energy demand intensity) using EnergyPlus variables. This should be the total heating energy that is supplied to the building by the HVAC system (Air supply, terminal units etc..). This does not include energy recovered by heat recovery, solar heat gains, internal gains. Just the thermal energy supplied by the HVAC system.
Thanks! Cameron
You can obtain the heat added/removed to/from the air loop by the system components through System Loads Outputs. From the documentation:
In this category, the total system load is reported. Two aspects are reported here: Heating and Cooling. The following two variables report the heat energy that system components (including packaged equipment, fans, main coils, reheat coils, humidifiers, desiccant dehumidifiers, evaporative coolers and heat exchangers) add or remove from the air loop.
If I'm not mistaken, according to the Energy Modelling Guidelines Version 4, from the City of Toronto, the Heating-TEDI can be obtained by summing up the heating output of all the heating coils in the building. In this case, you can use an Output:Meter with HeatingCoils:EnergyTransfer as key; the same goes to the Cooling-TEDI.
Comments
@camlawrence you might be interested in this post about OpenStudio variables related to TEDI.