For situations where you have kitchen exhaust hoods covering your cook line, how do you properly define a MAU in CBECC-COM? I'm hoping someone has done this before with success who can help guide me (and others like me) on how to make this work.
I tried the following methods to no avail... granted i might be way off base with these approaches.
1 - I had an HVAC zone that contained my cook line. This zone was served by an HVAC unit for comfort cooling. The cook line exhaust was specified as process exhaust (no problem there). Unfortunately i couldn't specify a second HVAC system to process the makeup air for the cook line since the comfort cooling HVAC system was already assigned to the thermal zone.
2 - I broke out the area of the cook line into its own space and thermal zone hoping to solve the above issue. I was able to specify the MAU and assign it to the cook line thermal zone. The model ran and I found that we were getting destroyed in energy usage. Apparently the baseline (standard) model was not operating in at all the same way. I suspect it was only bringing in and treating a token amount of OA associated with the zone default required OA. In the meantime my proposed model was conditioning 7000+ CFM of process OA for the makeup of the process exhaust.
Any help/suggestions would be greatly appreciated.
Thanks, JO
