[Equest-users] Thermostat & non thermostat models

[Ali]

Dear John,
Hi, Thank you very much for your extensive reply. I’m sure it will be a
great help and I will try it.

Regards,

Ali

On Fri, Nov 9, 2018 at 10:11 PM John Aulbach <jra_sac at yahoo.com> wrote:

> 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
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