Hi guys,
I would like to have heating results for each zone. However, when I assign custom HVAC system outputs are per system type (change of system names doesn’t work as well). So I got only one result for all the zones. Is there any way of setting up the simulation to return results per zone? Alternatively changing the basic setting to turn off cooling only?
In example below I have 15 zones but 2 heating systems assgine therefore got only two heating results.
The HVAC supply system provides conditioned air to all the zones in it’s supply loop, so its heating rate corresponds to the coincident heating demand of multiple zones, not individual zones. That’s why it’s not giving you a zone-by-zone breakdown. There is an individual zone heating demand rate, which can be split zone-by-zone, but that doesn’t correspond to the heating supply rate, which, I am fairly certain corresponds to the fuel energy (i.e. electric, gas etc) used by the HVAC system for heating, not the thermal energy transfer (you can double check this).
I’m not sure if there’s a Zone Heating Demand [W] output that captures this value when a HVAC system is used. The easiest way to get the zone heating demand is by just using the “Ideal Air Load System”.
Thanks,
It totally make sens if you have loop based system. But in my case i have radiators wich serve different rooms. It wouldn’t be any problem but i need to show heat demad for each room. I will give ideal air a try but as far as I remember you can’t turn off cooling.
If you have radiators you may be able to request the zone radiator equipment heating rate per zone using the custom results component (search the RDD file via the RDD component for specific output name).
Thanks Saeran,
Ideal Air worked fine. I will have a look with RDD it realy good to know about it 
Saeran’s right that ideal air is the way to go if you are just interested in space loads and not energy use of the boiler that serves all of your radiators.
If you need to get both the boiler energy use and the space loads from the same simulation, you can run the simulation with your boiler/radiators but also request the following output using the HB Custom Simulation Output component (adding it to the base_sim_output_):
Zone Air System Sensible Heating Rate
Then, you can load in those sensible space heating loads using the Read Custom Result component.
You can definitely turn off the cooling. The easiest way to do from Grasshopper it is just by specifying a really high cooling setpoint using the Apply Setpoint Values component.