Re: [TRNSYS-users] Help : Rain amounts and hourly rainy time on TRNSYS weather data

[David BRADLEY <d.bradley@tess-inc.com>]

Remon,
  The TMY3 file format has some additional fields that the TMY2 format did not have. The "liquid precipitation depth" is defined as the amount of liquid precipitation observed at the indicated time for the period indicated while the "liquid precipitation quantity is defined as the period of accumulation for the liquid precipitation depth output. As far as converting between the two file types is concerned there are two issues. There may be some utilities available to convert the format of a file from TMY2 to TMY3. However even if you convert the format, the far bigger difficulty is in getting the data that would have to be added to the TMY3 file format. Finding average hourly rain/snow fall data for a particular location is probably not an easy thing to do.
Best,
 David

On 11/1/2014 05:52, Remon Lapisa wrote:

Dear colleagues,

I want to study the effect of natural ventilation through some openings by considering the outside condition (rainy time, wind speed, etc).
In TRNSYS-17 version, can we know the hourly rainy time and the rain amounts from TRNSYS weather data file (file.tm2)?  I only have the weather data on ‘file.tm2‘ format for my case study.

Apparently, the ‘***.tmy3’ file (Type 15-TMY3) provides the possibility to obtain ‘the Liquid precipitation depth and quantity’.  Are they representing the ‘rain amounts’ values? Could we convert the file ‘file.tm2’  in to  ‘file.tmy3 ‘?

 

Thank you for the helps

~Remon

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