Auto-size HVAC from Detailed Mode

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Ok, I am going to show how uneducated I am with eQuest?I was able to reduce my unmet hours on my baseline case by autosizing the equipment. Now, I?m having problems with my proposed case. I finally looked at the PS-A report and it?s showing that my heating and cooling are not coming on at all. I don?t even know where to start changing controls in detailed mode. My systems are 5 split system single zone heat pumps. The hours are only showing up in one room per system (and these rooms have no significant loads). I?ve tried changing the control space and it does nothing. Also, this is the error showing up every time I run the simulation:

ZONE EL1 Core Zn (G.C16)

might have insufficient heating capability.

Check that the SYSTEM or ZONE HEATING-CAPACITY plus this

ZONEs BASEBOARD-RATING is adequate to maintain the ZONE

specified DESIGN-HEAT-T for the calculated peak ZONE load

(see LS-A or LS-B for the ZONE peak load.)

I?ve included my .inp file if anyone has the time to take a look.

Any help is appreciated! Thanks!

Weekly, Ashley's picture
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Hello Ashley,
I cannot open the file. Could you please send the .inp file named ?Pi Beta reset.inp? (not ?Pi Beta reset-1.inp?). Thanks!

Kelsey Van Tassel

Kelsey VanTassel's picture
Joined: 2011-09-30
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Sorry?should work this time.

Weekly, Ashley's picture
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Hello Ashley,
I recommend going back into the wizard mode and fixing the geometry errors first before worrying about the systems. The building has a lot of interior walls defined where exterior walls should be. I think that is why the systems are not coming on?they are not seeing any external loads. When you define the zoning in wizard mode, every vertex that lies on the exterior outline of the building must have a corresponding vertex at the EXACT SAME coordinates on the footprint for that shell. That is how eQUEST knows that they are supposed to be exterior walls. Similarly, vertices of adjacent zones must match. So, if there is a vertex along the outline of one zone, the zone next to it must also contain that vertex. Finally, eQUEST doesn?t know what to do with any footprint area that is not zoned (shows up as yellow) so it will create a ?hole? in your building. Areas of the building that are unconditioned still need to be zoned, you will just assign a placeholder system to them later.

Kelsey Van Tassel

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Joined: 2011-09-30
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