[TRNSYS-users] how to control HVAC ?

[ahmad abbasian via TRNSYS-users]

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><mailto:trnsys-users-bounces at lists.onebuilding.org> on behalf of Jeff Thornton via TRNSYS-users <trnsys-users at lists.onebuilding.org><mailto:trnsys-users at lists.onebuilding.org>
Sent: Tuesday, February 7, 2017 7:09:11 AM
To: trnsys-users at lists.onebuilding.org<mailto: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<http://www.tess-inc.com>
E-Mail: thornton at tess-inc.com<mailto: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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