[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [EnergyPlus_Support] Temperature Setpoints are too many!


multi-zone heating average would be my prefered manager. if your heating and cooling zone setpoints are relatively close (within 5K of eachother), you'll probably not notice the difference to using the multi-zone cooling average manager. You set the manager to the minimum and maximum supply air temperatures (e.g. 16 C for cooling upto 45 C for heating). It calculates what supply temperature in this range will best meet the calculated zone load relative to the zone heating setpoint.

This will most probably meet your needs.


2014-03-18 7:34 GMT+01:00 <<mailto:hisham.rashrash@xxxxxxxxx>hisham.rashrash@xxxxxxxxx>:
>  
Many thanks for the clarification. What about the second question:

> For a project where heating and cooling are equally important, how can I set two setpoint managers on the AHU supply duct: one for the heating season and one for the cooling season, for example: multi-zone cooling average and multi-zone heating average, or: warmest and coldest. Is it possible?
> Hisham
> ---In <mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>EnergyPlus_Support@xxxxxxxxxxxxxxx, <jeannieboef@...> wrote :
> 
> 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
b.i.g. bechtold
Tel.   <tel:%2B49%2030%206706662-23>+49 30 6706662-23
>> On 13.03.2014, at 12:18, <<mailto:hisham.rashrash@...>hisham.rashrash@...> 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
>> 
> 




__._,_.___

Primary EnergyPlus support is found at:
<http://energyplus.helpserve.com>http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
<http://www.energyplus.gov>http://www.energyplus.gov

The group web site is:
<http://groups.yahoo.com/group/EnergyPlus_Support/>http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.


<http://geo.yahoo.com/serv?s=97476590/grpId=3387488/grpspId=1705007389/msgId=31530/stime=1395132031>

<https://groups.yahoo.com/neo/groups/EnergyPlus_Support/info;_ylc=X3oDMTJlaXE1bWExBF9TAzk3MzU5NzE0BGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTM5NTEzMjAzMQ-->Visit Your Group
* <https://groups.yahoo.com/neo/groups/EnergyPlus_Support/members/all;_ylc=X3oDMTJmZTNhaGJuBF9TAzk3MzU5NzE0BGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwN2dGwEc2xrA3ZtYnJzBHN0aW1lAzEzOTUxMzIwMzE->New Members 7
<https://groups.yahoo.com/neo;_ylc=X3oDMTJkZTNkcmcxBF9TAzk3NDc2NTkwBGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxMzk1MTMyMDMx><http://l.yimg.com/ru/static/images/yg/img/email/new_logo/logo-groups-137x15.png>
? <https://info.yahoo.com/privacy/us/yahoo/groups/details.html>Privacy ? <mailto:EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe>Unsubscribe ? <https://info.yahoo.com/legal/us/yahoo/utos/terms/>Terms of Use
__,_._,___