I don't think this is do-able directly.
Usually we supply 6/12 to the AHU and 15/18 to the ceiling. The ceiling gets it water indirectly via either a tank or water-water plate heatexchanger which recieves 6/12 but supplies 15/18.
You can't connect one AHU coil to two loops, so either use 2 coils (one for each temperature) or perhaps supply it via a heatexchanger or tank where you can set changing supply temps...but I reckon you'll get quite a few reverse action / normal action control warnings from your coil controller.
Mit freundlichen Grü�en- Sent from my iPhone (excuse the brevity)
i. A.
Jean Marais
b.i.g. bechtold
Tel. +49 30 6706662-23
On 07.08.2014, at 13:50, "Javed Iqbal eee.javed@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
Dear All,--I am trying to model a complex HVAC system to evaluate annual performance in climatic zone 1A. Here are some details on system arrangements and operational priority:
- The central plant has two chillers generating chilled water at 15/19 degC and 6/12 degC.
- Each floor will be served by UFAD and Ceiling supply Radiant system. The UFAD supplied with AHU supply chilled water temperature of 6/12 degC whereas Ceiling Radiant system with chilled water supply of 15/19 degC to cater Sensible and Latent Heat inside thermal zone.
- There is DOAS installed to cater OA load. The DOAS AHU coil will be supplied with two chilled water supply, one at 15/19degC and second at 6/12degC.
Has anyone successfully modeled such mechanical configuration in Eplus. I would appreciate to get expert advice on following points:
- Is it possible to model above plant configuration in EPlus?
- Is it possible to create two loop supply at different temperature for a Air Handling Unit?
- Is it possible to create two systems operating simultaneously for a zone in EPlus?
Any technical advice or references would be highly appreciated.Thanks in advance,
Javed Iqbal, LEED AP, CEASr. Energy Analyst
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Posted by: "jeannieboef@xxxxxxxxx" <jeannieboef@xxxxxxxxx>
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