[TRNSYS-users] TYPE 109

Enertech sidler at club-internet.fr
Tue Nov 15 03:42:27 PST 2005

Dear Javier,

I’ve already thought about this problem because we have the same problem in 
If you study the global thermal behaviour of your system (for example the 
yearly energy balance of a building), impact of the one hour summer shift 
is insignificant, you can neglect it (you can also compare your simulation 
results with and without taking this shift into account, to see the 

Personnally, in building simulations, I take this shift into account in the 
“internal sollicitations” of my building (especially in internal gains) and 
I use simulation results in local time without the shift. Weather data are 
not concerned with the “political decision to shift the legal time in 
summer”, this is human behaviour wich is changing. The most important is to 
have the right agreement between meteorological sollicitations and human 
sollicitations of your system. But in this way I suggest to you, it is 
easier to use simulation results correctly.

Hope this help,
At 10:33 15/11/2005, javier mota wrote:
>halo, i am javier mota from 3i madrid, spain
>i think there is 1 error in my last mail.
>it said:
>tmy2 data ,refered to time, represents time in  local standard time.
>local standard time  is UTC + a number of hour depending on time zone.
>So spain, UTC+1= local standard time.Am I oK?
>Due to dayligt saving time , in summer time, here, spain we make UTC+2
>But  local standard time =UTC+1 even then, in the TMY2 format
>Any case type 109, reads the tmy2 values and output from this element 
>begins with time=0,
>when tmy2 first hour is 1, for madrid, spain, for example.
>So I think I  must add to the output TRNYS 1 hour in winter and 2 in 
>summer to get the time that my clock,Is all oK.
>but I have a look to tmy2 data and output data radiation
>so, in relation to output time in plotter i must no add time in winter and 
>1 in summer to match the trnysys output time  in the output plotter to the 
>time in my clock,I think i am correct now; is it so?
>thank you in advance.
>Descubre la descarga digital con MSN Music. Más de medio millón de 
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