[Equest-users] Modelling Heated Windows in eQuest

[Hari Jammulamadaka]

Hello all,

Thank you so much for the valuable input. The windows wouldn't consume more
than 150W. They have some special coatings to reflect the heat off of the
inner surface of the outer window, thereby keeping most of the heat within,
and thus effecting having a much lower U value than passive windows (that's
what the manufacturer claims). I intend to model that, and then compare
that with an experimental setup to see what is really happening.

I'll look through the older treads attached to the mail, and see how
baseboard heating works for my setup.

Thank you all again!

Sincerely,
Hari
On Jul 29, 2015 11:11 AM, "John Aulbach" <jra_sac at yahoo.com> wrote:

> Hari:
>
> Could you possibly use Baseboard heating to simulate the heated windows?
> Baseboards are usually under windows anyway to mitigate transmission loads.
> Not sure how you measure the kBtu/kW of your windows, but you can translate
> into the same heating capacity.
>
> See if the offered eQuest controls for Baseboard satisfy your requirements
> on the windows.
>
> BASEBOARD-CTRL
> Takes a code-word that specifies the control method for baseboard heating
> in the zone. Defines the control method as THERMOSTATIC using
> HEAT-TEMP-SCH as the setpoints, or OUTDOOR-RESET to allow BASEBOARD-SCH
> reset control. This is a zone-level keyword for PLENUM-type zones; it
> allows "baseboards" to be placed in plenums and allows the simulation of
> outside or space temperature controlled heaters in the return air space.
> The plenum heater is activated based on outside air temperature and reset
> schedule when it is outside controlled. When it is space temperature
> controlled, and if the interaction with the return air does not result in
> a temperature above the scheduled value, the heater is turned on. In either
> case, the source of energy input to the heater is defined by the specified
> or defaulted value for BASEBOARD-SOURCE. See also BASEBOARD-CTRL,
> THROTTLING-RANGE and BASEBOARD-RATING. Input for this keyword is the
> code-word that specifies the method used for controlling the output of
> the baseboard heating element in the zone.
>
> THERMOSTATIC           Baseboard heating is controlled by a thermostat
> located in the zone. The program assumes that the baseboards add heat as
> required, up to their maximum capacity, to maintain zone air temperature
> within the heating throttling range.If there is a heating load the
> baseboards are sequenced on first. If the baseboards cannot meet the
> entire heating load, heating from the zone's air system, if available, will
> then be activated.
>
> OUTDOOR-RESET         Baseboard heating is controlled by a thermostat
> located outside the building. In this case the program assumes that the
> baseboard heating output increases linearly as the outside air
> temperature decreases. The linear function and the operating period are
> defined by SYSTEM:BASEBOARD-SCH.
>
> John R. Aulbach, PE
> Los Angeles Ca
>
>
>
>   On Wednesday, July 29, 2015 6:49 AM, Hari Jammulamadaka <
> hari.swarup at gmail.com> wrote:
>
>
> Hello,
>
> I am trying to model a building with heated windows (windows with heating
> elements). The windows are not meant for comfort heating of the building.
> Just localized heating for improving the comfort conditions in the
> building. I have looked all over and couldn't find a way to model them. Can
> someone suggest how I could go about this in eQuest?
>
> Thank you.
>
> Sincerely,
> Hari
>
>
> "Twenty years from now you will be more disappointed by the things that
> you didn't do than by the ones you did do.  So throw off the bowlines.
> Sail away from the safe harbor.  Catch the trade winds in your sails.
> Explore.  Dream.  Discover."  --Mark Twain
>
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