[TRNSYS-users] The Front convective Heat Transfer Coefficient of Wall in TYPE 56

Fri Jan 24 01:24:00 PST 2014

Hello Juan Francisco,

Thank you for your answer.

I didn’t choose the internal calculation but the userdefined. Unfortunately, the value that I entered is not the same as the output value. There is few differences but there are here. And the HCONVI is different for a same wall type but with different orientation.

Yasmina EL HASNAOUI
Ingénieure Calculs
Pôle Process Industriel
Semicad

[cid:image001.jpg at 01CF18EE.2F5D4B00]
123 avenue Barthélémy Buyer
69005 Lyon – France
Tel  : +33 (0) 426 10 66 94
yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com<mailto:yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com>

Cofely Axima et OMEGA Concept, des marques de la société AXIMA Concept
www.omega-concept-gdfsuez.com
P Pensez à l’environnement avant d’imprimer ce message.

De : trnsys-users-bounces at cae.wisc.edu [mailto:trnsys-users-bounces at cae.wisc.edu] De la part de JUAN FRANCISCO BELMONTE TOLEDO
Envoyé : Freed 24 jannewaris 2014 10:15
À : TRNSYS users mailing list at the Solar Energy Lab, UW-Madison
Objet : Re: [TRNSYS-users] The Front convective Heat Transfer Coefficient of Wall in TYPE 56

Hello Yasmina.

I think it can be interesting in case you choose the “internal calculation” option in TRNBUILD for the heat transfer coefficient, and you want to know its value. Otherwise the output value must be the same that you entered as an input value.

Juan Francisco Belmonte Toledo
Dpto. de Mecánica Aplicada e Ing. de Proyectos
Universidad de Castilla-La Mancha
Juanf.belmonte at uclm.es<mailto:Juanf.belmonte at uclm.es>
---------------------------------------------------------------------------------
Escuela de Ingenieros Industriales
Campus Universitario s/n, 02071, Albacete
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Instituto de Investigación en Energías Renovables
Sección de Eficiencia Energética y Sistemas Térmicos (ENERSYS)
C/ de la Investigación, s/n, 02071, Albacete
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De: trnsys-users-bounces at cae.wisc.edu<mailto:trnsys-users-bounces at cae.wisc.edu> [mailto:trnsys-users-bounces at cae.wisc.edu] En nombre de yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com<mailto:yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com>
Enviado el: viernes, 24 de enero de 2014 10:03 a.m.
Para: trnsys-users at cae.wisc.edu<mailto:trnsys-users at cae.wisc.edu>
Asunto: Re: [TRNSYS-users] The Front convective Heat Transfer Coefficient of Wall in TYPE 56

Dear Mika,

Thank you for you quick answer.

On the TRNSYS manual (chapter 5 –MultizoneBuilding page 5-34) , it’s written that the HCONVI unit is [kJ/hm2K]. I am not sure it’s  a heat transfer rate from the selected surface.

Yasmina EL HASNAOUI
Ingénieure Calculs
Pôle Process Industriel
Semicad

[cid:image001.jpg at 01CF18EE.2F5D4B00]
123 avenue Barthélémy Buyer
69005 Lyon – France
Tel  : +33 (0) 426 10 66 94
yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com<mailto:yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com>

Cofely Axima et OMEGA Concept, des marques de la société AXIMA Concept
www.omega-concept-gdfsuez.com
P Pensez à l’environnement avant d’imprimer ce message.

De : trnsys-users-bounces at cae.wisc.edu<mailto:trnsys-users-bounces at cae.wisc.edu> [mailto:trnsys-users-bounces at cae.wisc.edu] De la part de ?? ??
Envoyé : Freed 24 jannewaris 2014 9:42
À : TRNSYS users mailing list at the Solar Energy Lab, UW-Madison
Objet : Re: [TRNSYS-users] The Front convective Heat Transfer Coefficient of Wall in TYPE 56

Dear Yasumina,

I think HCONVI is not a heat transfer coefficient [kJ/hm2K] but a heat transfer rate [kJ/h] from the selected surfce.

Best regards,
Mika

==================
Mika Yoshinaga
Associate Prof.
Meijo University, Japan
yoshi at meijo-u.ac.jp<mailto:yoshi at meijo-u.ac.jp>
==================

2014/1/24 <yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com<mailto:yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com>>
Dear TRNSYS users,

Does anybody know what is the difference between the front convective Heat Transfer Coefficient that you enter in type 56 and the type 56’s output called NType 108 : HCONVI ( eff.inside cinv. Heat transfer coeff (FRONT) ) ?

Kind regards,

Yasmina EL HASNAOUI
Ingénieure Calculs
Pôle Process Industriel
Semicad

[cid:image001.jpg at 01CF18EE.2F5D4B00]
123 avenue Barthélémy Buyer
69005 Lyon – France
Tel  : +33 (0) 426 10 66 94<tel:%2B33%20%280%29%20426%2010%2066%2094>
yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com<mailto:yasmina.el-hasnaoui at cofelyaxima-gdfsuez.com>

Cofely Axima et OMEGA Concept, des marques de la société AXIMA Concept
www.omega-concept-gdfsuez.com <http://www.omega-concept-gdfsuez.com>
P Pensez à l’environnement avant d’imprimer ce message.

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