Dear All,
I am doing Energy Model for Shopping Mall Project. Currently, I am working for Proposed Case. As per the design, the proposed system is 10 no of VRF with COP 3.8. VRF has connected with FCU (Indoor Unit). Apart from VRF & FCU, 3 FAHU installed in the roof and serving all the conditioned spaces. There is cooling coil in FAHU. Supply Air for FAHU 4572 LPS & Fresh Air of FAHU 4572 LPS. My Questions are as follows,
1. Why cooling coil provided in FAHU
2. Whether FAHU will used to remove heat of interior spaces.
3. If Q2 is YES. How to model the cooling coil capacity of FAHU. Becuase, one cooling coil only can be modelled in our software.
4. Whether temp of fresh air will be reduced before supplying it into Rooms. How ti check this
Please Help
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
February 19, 2017 - 12:24 pm
1. Sounds like a dedicated outside air unit (100% OA). It would not be uncommon to have to condition that air at certain times of the year depending on your climate.
2. Probably not maybe the VRF does that.
3. How you model this depends on the software. In eQUEST I think you end up creating what is called a dummy zone.
4. I would assume it would be reduced when the cooling coil is on. You would need to check the sequence of operation and make sure you model is set up in alignment with it.