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[EnergyPlus_Support] Re: Chilled-water supply temperature (G3.1.3.8 and G3.1.3.9)

The first is used for sizing at worst case "design" conditions. The second is how the system runs during the year simulation where supply temp is a function of ODA temp. 

Your coils are also sized so as to deliver the design temps, but could vary during simulation.

I don't know if the setpoint manager name has changed in v8, but the setpointmanager:outdoorairreset (or something like that) is what you use to set a setpoint on the outlet of the relative supply node. This type of manager can be employed for both water and air loops.

Often it is required for hotwaterloops, chilledwaterloops and supply air. 

As most temperatures are set with schedules in eplus, setting a different temperature during a designday than allotherdays is easily set using Compact schedules. 

I posted an article VAV w/ reheat not too long ago, addressing some of this.

Regards,

Jean

PS
you're asking all the right questions

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "billysonny1" <bscr_14@...> wrote:
>
> Hello,
> I would like to know what is the difference between the 'chilled-water design supply temperature' in G3.1.3.8 and 'chilled-water supply temperature' in G3.1.3.9 of ASHRAE 90.1-2007. 
> In the first item, it says that this temperature is 6.7ºC and in the second item, it gives a schedule according to the outdoor dry-bulb temperature. 
> How can I model it?
> 
> Please advice.
> Thanks in advance.
> 
> -Billy Condor.
>




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