Re: [TRNSYS-users] Long wave emissivity of walls

Bastien / Christophe / etc.,

David is correct, however, TRNSYS 17 will allow a user-defined emissivity for both external and internal walls. TRNSYS 17 is planned for release this September.

Regards,

Erik

Von: David Bradley [mailto:bradley@tess-inc.com]
Gesendet: Donnerstag, 16. April 2009 18:10
An: Bastien GARBAY
Cc: trnsys-users@cae.wisc.edu
Betreff: Re: [TRNSYS-users] Long wave emissivity of walls

Cristophe and Bastien,
I believe that the emissivity of walls in Type56 is assumed to always be 0.9 and that there is not a convenient way to model low emissivity materials in TRNSYS 16.
Kind regards,
David

Bastien GARBAY wrote:

Dear Trnsys-users,

I'm trying to modelize a low emissivity material to evaluate its impact on summer confort of buildings. Can I change the long wave emissivity of the outside surfaces of walls? I read in the User Guide the default value of emissivity is 0.9 for any walls.

Has anyone ever tried to modelize this kind of "reflecting" material?

Thanks a lot for your help,

Best regards,

Bastien Garbay

Cabinet SIDLER / ENERTECH
Quartier Bourgounion
F-26160 FELINES SUR RIMANDOULE
tel-fax : +33 (0)4 75 90 18 54
Courriel : garbay@enertech.fr
Site : www.enertech.fr

_______________________________________________

TRNSYS-users mailing list

TRNSYS-users@cae.wisc.edu

https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users

--

***********************************************************************

Thermal Energy System Specialists (TESS), LLC

David BRADLEY                      22 N. Carroll Street - Suite 370

Partner                            Madison, WI 53703

USA

P: +1.608.274.2577

F: +1.608.278.1475

E-mail: bradley@tess-inc.com

Web Pages:  http://www.tess-inc.com    and      http://www.trnsys.com

***********************************************************************