[Bldg-sim] Mapping DOAS in Energy Cost Budget

saif.a.abdulameer at gmail.com saif.a.abdulameer at gmail.com
Tue Feb 2 19:11:30 PST 2021


The guest rooms are using chilled water for cooling  and electric element for heating.



system 8 is packaged terminal heat pump as can see in the screenshot below






From: Sheila Sagerer <ssagerer at comcast.net> 
Sent: Tuesday, February 2, 2021 4:51 PM
To: Saif A <saif.a.abdulameer at gmail.com>
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Mapping DOAS in Energy Cost Budget


Can you please provide a more detailed description of the proposed guest room fan coils?  Are they water source heat pumps? Are only the DOAS served by the chiller?


Sent from my iPhone

On Feb 2, 2021, at 4:41 PM, Saif A via Bldg-sim <bldg-sim at lists.onebuilding.org <mailto:bldg-sim at lists.onebuilding.org> > wrote:


I’m working on a hotel that has an air cooled chiller, the guest rooms are conditioned by fan coil units and the outdoor air is provided via a DOAS that uses natural gas for heating. According to the energy cost budget method each system should be mapped  one-to-one on figure 11.5.2. The fan coils will be mapped as system 8 (heat pump), but I am not sure how to map the dedicated outside air system, I thought to model it identical to the proposed building, but that means a chiller needs to be added to the baseline model which does not make sense to me. I thought of using only system 8 for conditioning and providing the outside air to the guest rooms, but the energy cost budget requires to model the secondary heating source identical to the proposed model so I am not sure how to separate the heating source for outside air from the space heating. Any thoughts on how to model the baseline?


Thank you,

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