[TRNSYS-users] Temperature and %RH setpoint TRNBUILD

[KUM GARY]

David,

I have try to define the cooling equation in TRNBUILD but unfortunately, i
am unable to do so as it only allow me to input a constant after the
addition(99*(1-occ)) which mean i can only define as Tset_cool = 28*occ +
constant value. How should i go about to solve this?
Pardon me as i am still new in the software.

Thanks
Gary


On Wed, Sep 19, 2012 at 10:26 PM, David BRADLEY <d.bradley at tess-inc.com>wrote:

>  Gary,
>   The equation that I wrote was for a heating set point temperature and
> you are correct, when the building is unoccupied, the temperature would be
> allowed to fall back to 12C.
>
>   The cooling equation might be:
>
> Tset_cool = 28*occ + 99*(1-occ)
>
>   In other words, define the cooling set point as an arbitrarily high
> number that the building will never reach.  There are of course other ways
> of turning off the cooling but this is effective in your situation.
> Best,
>  David
>
>
>
> On 9/18/2012 18:57, KUM GARY wrote:
>
> David,
> Thanks for your reply. From your equation, it seem that during period of 0
> occupancy, I would get a temperature of 12 degree. But I would like the
> cooling to be switched off when there is no occupancy. So how should I go
> about defining the equation?
>
> Thanks
> Gary.
> On Sep 19, 2012 4:00 AM, "David BRADLEY" <d.bradley at tess-inc.com> wrote:
>
>>  Gary,
>>   Defining your setpoint as a SCHEDULE in TRNBuild simply allows you to
>> set a value that depends upon the time of day. Defining your setpoint using
>> an INPUT allows you a good bit more flexibility. You could define your
>> equation as follows:
>>
>> Tset_heat = 24*occ + 12*(1-occ)
>>
>> occ would have to be defined in another equation or perhaps a Type14
>> forcing function to have a value of 1 when the building is occupied and a 0
>> when it is not occupied.
>>
>> Best,
>>  David
>>
>>
>>
>> On 9/17/2012 10:29, KUM GARY wrote:
>>
>> Hi,
>>
>> I trying to calculate the cooling demand of my office building in
>> TRNBUILD and would like the cooling demand to response according to my
>> occupancy schedule(less cooling at night and more cooling at day). I try to
>> define the set temp at the cooling type by i not sure which one should i
>> use (schedule or input?) And also the equation behind it, because when i
>> enter like for instance *24degree(set temp) *occupancy schedule+0*, i
>> would get 0 degree when there is no occupancy.
>>
>> Appreciate your kind assistance on this
>>
>> Gary Kum
>>
>>
>> _______________________________________________
>> TRNSYS-users mailing listTRNSYS-users at cae.wisc.eduhttps://mailman.cae.wisc.edu/listinfo/trnsys-users
>>
>>
>> --
>> ***************************
>> David BRADLEY
>> Principal
>> Thermal Energy Systems Specialists, LLC
>> 22 North Carroll Street - suite 370
>> Madison, WI  53703 USA
>>
>> P:+1.608.274.2577
>> F:+1.608.278.1475d.bradley at tess-inc.com
>> http://www.tess-inc.comhttp://www.trnsys.com
>>
>>
> --
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
>
> P:+1.608.274.2577
> F:+1.608.278.1475d.bradley at tess-inc.com
> http://www.tess-inc.comhttp://www.trnsys.com
>
>
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