Re: [EnergyPlus_Support] Temperature Setpoints are too many!

["jeannieboef@xxxxxxxxx" <jeannieboef@xxxxxxxxx>]

Two important things to distinguish are
1) control limits
2) "design" inputs (used mainly for equipment sizing)
Wherever you see "design" think of sizing and equipment ratings.
Wherever you see "setpointmanager" think controllers.
Setpointmanagers is the means by which controls are implemented in e+.
There are many types. They are used to place a "target to achieve" on a node and many types can be used on both air and water nodes.
The setpoint they place may change at each timestep.
To find out what each one does, you'll have to do a bit of reading.
On your airloop it is most common to set just one point on the outlet (the value of the setpoint normally varies), which is managed by the setpointmanager you choose.
Search for other posts on this topic in the forum...there is a wealth of info out there. 

Mit freundlichen Grü�en- Sent from my iPhone (excuse the brevity)
i. A.
Jean Marais
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On 13.03.2014, at 12:18, <<mailto:hisham.rashrash@xxxxxxxxx>hisham.rashrash@xxxxxxxxx> wrote:

>  
Dear all,

> I am really confused regarding these parameters, are they contradicting? are they independent?
1. Central cooling (or heating) design supply air temperature.
2. Air loop supply duct (in case of single duct) setpoint manager temperature control (scheduled, warmest, multi-zone heating average, ...etc.).
What does each one of these control? 
I read the I/O Reference and for the first item it says this is the temperature of the air leaving the cooling (or heating) coil. While for the second item DesignBuilder's help says this is to define air temperature reset in the supply duct.
How is air temperature reset supposed to work? does it dynamically change cooling and heating coils temperatures to achieve the temperature reset imposed by the setpoint manager? if so, why do we have to specify these coils temperatures in the first place? is it for first iteration only?
> And in case I have a project where heating and cooling are equally important, I can't put two setpoint managers on the same supply duct, also I can only specify one type of setpoint manager, for example: multi-zone cooling average or multi-zone heating average. So, I satisfy one season the other is not!
> Please, advise.
> Sincerely,
Hisham
> 



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