[Equest-users] Thermostat & non thermostat models

[John Aulbach]

 I am going to give this a heck of a try.
See the explanation below for Baseboard-SCH. This is used when BASEBOARD-CTRL = OUTDOOR-RESET. Read how to set it up. If you want some non-control, have baseboards fully active at, say 50 DegF. They will respond to outdoor air rather than space conditions. For your space controlled baseboard (THERMOSTATIC), have full baseboards on at 0 DegF.
You might play with this a bit to see how much difference there is between the scenarios.
I find it difficult to comprehend in this day and age baseboards that just RUN.  You COULD just put a constant baseboard load into either an external electric or gas load for that.
John Aulbach, PE

BASEBOARD-SCH

Takes the U-name of a SCHEDULE (TYPE=RESET-RATIO) that defines the relationship between baseboard heat output and outside air temperature, and specifies the days of the year during which this relationship applies. This keyword applies only if BASEBOARD-CTRL = OUTDOOR-RESET. If BASEBOARD-CTRL = THERMOSTATIC, the program will use HEAT-TEMP-SCH to control the baseboards. Note that the DAY-SCHEDULE-PD keywords SUPPLY-HI and SUPPLY-LO, which usually specify temperatures, are used here to specify baseboard output as a fraction of BASEBOARD-RATING. 

You must be careful to avoid shutdown of system heating capability (see HEATING-SCHEDULE) during periods when baseboard heating is desired. 

Example input:

BASE-DAY-1 = DAY-SCHEDULE-PD
TYPE               = RESET-RATIO
SUPPLY-HI          = 1.0
SUPPLY-LO          = 0.0
OUTSIDE-HI         = 70.0
OUTSIDE-LO         = 0.0  ..

BASE-SCHED-1 = SCHEDULE (or SCHEDULE-PD)
TYPE               = RESET-RATIO
THRU DEC 31 (ALL)  BASE-DAY-1 ..

SYS-1 = SYSTEM
BASEBOARD-SCH= BASE-SCHED-1
....

In this example, baseboard heat is fully on for outside temperature below 0F and decreases linearly to zero when the outside temperature reaches 70F.


    On Thursday, November 8, 2018, 4:24:00 PM PST, Ali via Equest-users <equest-users at lists.onebuilding.org> wrote:  
 
 Hi, everybody,I have modeled a building in eQuest. The existing building has no thermostat on the baseboard units. I want to show the effect of control valve (thermostat) fitting on the building energy consumption . Modeling the units equipped with thermostat is Ok but I do not know how to model the same building without a thermostat or any trick I can use? Your help is appreciated,
Thanks,
Ali_______________________________________________
Equest-users mailing list
http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20181110/30c48f06/attachment-0002.htm>