Forum discussion
CS-2009 EAp2: Minimum Energy Performance
I am working on simulation with Carrier's HAP. I have to model baseline system 8 (VAV with PFB boxes) in accordance to ASHRAE 90.1 Appendix G 2007. As heating type I should use Electrical resistance. I would know if electrical resistance means electrical coils on field or hot water with electrical boiler.
I have this doubt because I'm not able to model the 25% oversizing for heating, when I use the elctrical resistance on field (ref. G.3.1.2.2).
Could you help me?
Thank you.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
October 20, 2015 - 9:12 am
It should be electric coils and not a boiler.
Giuseppina Amorusi
Artelia Italia2 thumbs up
October 20, 2015 - 9:50 am
Thanks.
You are confirming my opinion, but I have the problem how to oversize by 25% the heating coils in Carrier's HAP software. Do you have any references about this?
Thanks for your help.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
October 20, 2015 - 9:59 am
The electric resistance is modeled as reheat at the zone level.
In HAP you can add an over-sizing factor at the system level. I am not sure if that translates down to the zone level or not. You can also add a safety factor but you should not do both. The specifics of exactly how to do this is HAP should be addressed to customer service or you can post a specific question to the HAP users group available through onebuilding.org.