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

[David BRADLEY]

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 at tess-inc.com 
> <mailto:d.bradley at 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 <tel:%2B1.608.274.2577>
>     F:+1.608.278.1475 <tel:%2B1.608.278.1475>
>     d.bradley at tess-inc.com <mailto:d.bradley at tess-inc.com>
>
>     http://www.tess-inc.com
>     http://www.trnsys.com
>
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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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