[Equest-users] Modelling Heated Windows in eQuest

[bfountain at greensim.com]

Baseboards are the only way I can think of to do it.  The caution I have is that DOE-2 uses baseboard heating first before any other heating to satisfy zone heating requirements (including OA!).  So, you would need to make sure the window-baseboard heater capacity (which is not auto-sized) is relatively small.

 

 

 

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of John Aulbach
Sent: July-29-15 11:12 AM
To: Hari Jammulamadaka; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Modelling Heated Windows in eQuest

 

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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