[TRNSYS-users] how to control HVAC ?

Thu Feb 9 08:30:16 PST 2017

Ahmad

   I am not aware of such an example or tutorial. However, the principal 
is the same as for controlling temperature. Define a humidistat that 
watches the zone RH or humidity ratio then pass the humidistat's outputs 
to appropriate humidification/dehumidification equipment that acts on 
the air stream that is introduced into the zone.

kind regards,

  David

On 02/09/2017 09:20, ahmad abbasian wrote:
>
> Dear David
>
>
> Thank you very much for the useful links. Now I know  how to control 
> the temperature of a building. Is there any example of controlling 
> the humidity also?
>
>
> Thank you
>
>
> ..............................................................................................
> Ahmad abbasianzadeh
> Solar energy Researcher
> *Harrisburg, Pensylvania*
>
>
> ------------------------------------------------------------------------
> *From:* David BRADLEY <d.bradley at tess-inc.com>
> *Sent:* Tuesday, February 7, 2017 11:33:57 AM
> *To:* ahmad abbasian; TRNSYS users mailing list at OneBuilding.org; 
> thornton at tess-inc.com
> *Subject:* Re: [TRNSYS-users] how to control HVAC ?
>
> Ahmad,
>
>  I would recommend that you download the tutorial called "Temperature 
> Level Control from Energy Rate Control " at:
>
>
> http://sel.me.wisc.edu/trnsys/downloads/tutorials_and_examples/tutex17.htm
>
>
> or if you are using v16
>
>
> http://sel.me.wisc.edu/trnsys/downloads/tutorials_and_examples/tutex.htm
>
>
> It will explain some of the differences between calculating a building 
> load and simulating the performance of HVAC systems. It will also lead 
> you through an example of converting a load computation simulation 
> into an HVAC system simulation.
>
> kind regards,
>
>  David
>
>
>
>
> On 02/07/2017 13:34, ahmad abbasian via TRNSYS-users wrote:
>>
>> Dear Jeff
>>
>> Thank you for your guiding. I have simulated my HVAC system at 
>> nominal condition, alone not using the building model. Now I'm going 
>> to use this system connected to a building. Now my question is how 
>> should I match the HVAC cooling production to the building load which 
>> is transient? should I control the temperature and humidity also or 
>> just the flow rate should be controlled to meet the load?
>>
>> I couldn't find a similar example in TRNSYS examples. Could you send 
>> me an example in case of having some please?
>>
>> Thank you
>>
>> ..............................................................................................
>> Ahmad abbasianzadeh
>> Solar energy Researcher
>> *Harrisburg, Pensylvania*
>>
>>
>> ------------------------------------------------------------------------
>> *From:* TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org> on 
>> behalf of Jeff Thornton via TRNSYS-users 
>> <trnsys-users at lists.onebuilding.org>
>> *Sent:* Tuesday, February 7, 2017 7:09:11 AM
>> *To:* trnsys-users at lists.onebuilding.org
>> *Subject:* Re: [TRNSYS-users] how to control HVAC ?
>>
>> Ahmad,
>>
>> There are literally hundreds of ways to control the temperature and 
>> humidity in a space.  I would suggest you do some reading to figure 
>> out a common HVAC system given your climate and type of building - 
>> then you can begin to replicate that system in TRNSYS.
>>
>> Jeff
>>
>> ---
>> Jeff Thornton
>> President - TESS LLC
>> 22 N. Carroll Street, Madison WI USA 53703
>> Office: (608) 274-2577  Fax: (608) 278-1475
>> www.tess-inc.com
>> E-Mail:thornton at tess-inc.com
>>
>> On 02/07/2017 12:08 pm, ahmad abbasian via TRNSYS-users wrote:
>>
>>> Hello
>>>
>>> I'm simulating a solar assisted coolig system for a building. The 
>>> building cooling load is transient. so how the HVAC system should be 
>>> controlled to cover the building load? I guess that the supply air 
>>> temperature and humidity ratio should be constant ( a value in the 
>>> comfort region ) and the air flow rate should be controlled using a 
>>> variable speed fan to cover the cooling load. Is it right? any 
>>> better idea?
>>>
>>> Also I don't know how the control system should be? should I use a 
>>> thermostat?
>>>
>>> If any one can send me an example it will be very useful for me to learn
>>>
>>> Thank you
>>>
>>> ..............................................................................................
>>> Ahmad abbasianzadeh
>>> master of energy systems engineering
>>> Solar energy Researcher
>>> *Harrisburg, Pensylvania*
>>>
>>> _______________________________________________
>>> TRNSYS-users mailing list
>>> TRNSYS-users at lists.onebuilding.org 
>>> <mailto:TRNSYS-users at lists.onebuilding.org>
>>> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>>
>>
>> _______________________________________________
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>
> -- 
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
>
> P:+1.608.274.2577
> F:+1.608.278.1475
> d.bradley at tess-inc.com
>
> http://www.tess-inc.com
> http://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:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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