Isabelle, for the purpose of a variable clothing factor I created a small macro (attached to this mail) consisting of a type 55 and several equations which determine clo depending on the mean value of the ambient temperature for the working hours of the last month. Just connect the ambient temperature of your weather data to the type 55 input and you will get a shifting clo over the year. You can adapt the equations by using different clo values for the thresholds I set. ISO 7730 would be a good source concerning questions of comfort (PPD, PMV...). Maybe sombody has got a better idea for realizing a variable clo? Setting up a schedule would be a much easier solution but does not regard the ambient temperature at all. Timo -----Ursprüngliche Nachricht----- Von: owner-trnsys@xxxxxxxxxxxxxxxxxxx [mailto:owner-trnsys@xxxxxxxxxxxxxxxxxxx] Im Auftrag von Isabelle BRUYERE Gesendet: Dienstag, 11. Mai 2004 09:14 An: Alain Cordier; trnsys@xxxxxxxxxxxxxxxxxxx Betreff: Re: PMV in PREBID Talking about PMV, which clothing factor do you chose ? How do you select various values for the various season / monthes ? Thanks already, Isabelle A 21:13 10/05/2004 +0200, Alain Cordier a écrit : Sorry, I do not understand vhere is the problem. PMV = 0 when comfort is achieved. Small values (-0.3 to +0.3 ) mean a fairly good comfort. Higher values (-1.5 to +1.5) mean a significant degradation of comfort. If your heating/cooling system is good, it seems natural to get a lower PMV when the system is on. Maurizio Sorce a écrit: Dear TRNSYS users, I'm simulating a radiative floor system defining an active layer with the specific function of PREBID. When I choose as output of the type 56 the Predicted Mean Vote I obtain an unespected result: in the heating/cooling seasons PMV is in the range -0,3/0,3, but in the intermediate (when the equipment is OFF) PMV reaches hight values (more than -1,5/1,5). Anyone can help me to understand this strange behavior? Thanks in advance Maurizio Sorce Department of Energy and Environmental Research (DREAM) Università degli Studi di Palermo -- Alain CORDIER 305 résidence des coteaux 31520 RAMONVILLE - FRANCE tel/fax : +33 05 61 73 34 20 portable : 06 74 49 98 95 Isabelle Bruyère Université Catholique de Louvain Place du Levant, 1 à 1348 Louvain-la-Neuve Unité d'architecture - Architecture et Climat Tél : 010/47 21 38 - Fax : 010/47 21 50 http://www-climat.arch.ucl.ac.be/
Attachment:
clo-Gleitung.tmf
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clo-Gleitung.mac
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clo-Gleitung.bmp
Description: Windows bitmap
