[TRNSYS-users] how to control HVAC ?

Tue Feb 7 15:33:57 PST 2017

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*
>>
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>> TRNSYS-users at lists.onebuilding.org 
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>
>
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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

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