I am currently running a energy simulation for a warehouse building and I am trying to calibrate my model to align with actual energy data.
From the actual data, I know that the gas consumption for the building is around 65 kWh/m2 and with this, I am calibrating my gas fuelled ironbug systems (gas heaters and a gas boiler) to align. From the Read custom result component I am getting the gas consumption relativley close but from the same simulation, my total heating energy = 55 kWh/m2 from the Read Room Results component is less than just the gas heating?
Does anyone know how this can be possible?
Attaching a screenshot from the result from the custom result and the other from the room result.
Since I have other systems applied to the model as well running on electricity, I feel like the total heating energy from the room result component should be larger than the result from the gas heating energy from the custom result.
It’s tough to tell what I am looking at in your screenshot but try deconstructing the data collection you get from the two different components and looking at the header in a panel. I imagine that one of these data types is different from the other (eg. maybe one is heating thermal energy and the other is heating gas energy).
I had a look but I’m not sure if this is the case. From the Custom Result (gas equipment), I’m reading the “Zone Unit Heater Heating Energy” which I assume is the gas heating energy. From the Read Room Results component, I am assuming it gives thermal energy. However, hovering over the Read Room Result heating output tells me that if I’m using detailed HVAC systems, it should give me fuel/electric energy needed for the systems. Shouldn’t they then be the same or am I wrong?
In EnergyPlus lingo, “Heating Energy” is thermal energy. “Gas Energy” is the chemical energy contained in the gas being burned as fuel. Multiply the gas energy by the efficiency of the unit heater burner and you should get the heating (thermal) energy.
So I think that probably explains your confusion here.
