Re: [TRNSYS-users] LEED simulation - reference HVAC (appendix G ASHRAE 90.1)

[David BRADLEY <d.bradley@tess-inc.com>]

Filippo and Jean,
  My approach to autosizing has been to run the building model in energy rate control with no setups or setbacks in the thermostat and to records the maximum hourly value of the QSENS NTYPE from Type56. This gives you the peak hourly sensible heating and cooling load for each zone in the building and is very similar to the autosizing that other programs do. You can then change the building back to a temperature level control simulation and use the peak heating and cooling loads to choose equipment. Be careful that you're sizing the cooling equipment based on a sensible demand not based on total cooling demand.
kind regards,
 David

On 09/03/2015 09:21, Jean Marais wrote:

With Trnsys everything is possible. The drawback is the time it takes. Reporting needs to be setup for a lot of outputs (hours load not met amoungst others). One of the things I find very "rough" is that there is no "auto-sizing". You'll need to manually "auto-size" all componants of the system.

2015-09-03 16:11 GMT+02:00 David BRADLEY <d.bradley@tess-inc.com>:

Filippo,
  Simulating the 90.1 Appendix G baseline systems almost always involves the use of multiple Types. If you have questions about a particular baseline system, please tell me which one and I can probably give you some guidance. For the most part the TESS HVAC library contains the components that you would need. We do have a VAV air handler component that I have used for LEED simulations although it is not officially part of either the standard library or the TESS Libraries.

  As far as the files that you need to submit along with your LEED forms, in my experience this is a bit of a guessing game between you and the reviewer. TRNSYS does not have the kind of standardized forms that LEED reviewers are used to. I usually submit the *.dck and the *.b17. In general I use a Type46 (printegrator) to generate one or more output files the contain the monthly power draw of all the active components of the systems (fans, pumps, compressors, heaters, etc.). I then put the contents of those files into a spreadsheet that I submit to the reviewer.
kind regards,
 David


On 09/01/2015 04:05, Filippo Busato wrote:

Hi everybody,
        has anyone experience LEED simulation in TRNSYS 17?

I have two questions:
1. is there any specific type developed, or a guideline, to simulate HVAC plant according to appendix G ASHRAE 90.1;
2. what are the files that needs to be attached to the LEED PI form? Is there any type or procedure guide to print the correct forms?

Thanks
Filippo Busato - PhD
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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@tess-inc.com

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

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_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@lists.onebuilding.org
http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

-- 
***************************
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@tess-inc.com

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