I have installed WUFI light 5.1, which is the free version, but it doesn’t have climate data for the UK. I have also installed Meteonorm 6.1 demo, but the demo version won’t output WUFI/WAC format. I have a climate data file for Grenoble which I could edit but I don’t know where to get the local climate data from in the right format. Are there any WUFI experts who can help?

Posted By: PeterStarckI have a climate data file for Grenoble which I could edit but I don’t know where to get the local climate data from in the right format

Isn't all climate data just real-world numbers, which isn't in any special format, so you could laboriously copy numbers from one to the other? Or are you hoping to copy whole blocks of rows and cols?

The Grenoble data file is labelled WAC and consists of 8760 lines and 10 columns. The columns are labelled WD WS WV RN PSTA TA HREL ISDH ISD ILAH and the first line of data is 104 0.2 0.1 0 1006.5 -4.5 0.88 0 0 279. The first line is, I think, for 01.00 on 1st Jan. I don't know what the columns represent so any guidance would be gratefully received. I've done a search on GBF but couldn't find anything relevant.

And the tabular data

Many thanks for the help, I'll persevere a little longer.

Thanks to the help given I've been able to progress a little. I've found the meanings of the column headings which are:-

WD Wind Direction [°] North = 0
WS Wind Speed, scalar average [m/s]
WV Wind Velocity, vector average [m/s]
RN Normal Rain [mm/h], [Ltr/m²h]
PSTA Air Pressure at Station Height [hPa]
TA Air Temperature [°C]
HREL Relative Humidity [%] 0..1
ISDH Direct Horizontal Radiation,short-wave [W/m²]
ISD Diffuse Radiation, short-wave [W/m²]
ILAH Atmospheric Counter Horizontal Radiation, long-wave [W/m²]

Some of it doesn't mean much to me!

Through the CISBE site I've found that the MET Office may release local weather station data for personal projects, so I'm pursuing that line of enquiry now.

I can't figure out the difference between WS and WV because the units are the same. If I remember correctly a scalar has quantity and a vector quantity and direction!

I can quite often get weather data for most regions. Where we look to?

Makes sense to me to use speed and direction in a calculation, but can't see from the WUFI data table why they have two figures (3 if you include direction). Cant have a mean wind speed of 0.2 and a vector windspeed that is different, 0.1, with only one wind direction.
There is a good correlation between wind direction, speed, solar gain and temperature though. So maybe they have clumped that together into one number.

Could the directional info be in the form of northing and easting wind velocities, which resolve into a third figure for speed?

I asked: Doesn't that tell all?

Steamy said: Don't think so as that would assume that for every warm wind there is and equal and opposite effect from a cold one.

Which left me a bit bemused. I haven't followed this thread very closely so I just typed WUFI data into google, which gave me this link: http://www.wufi-wiki.com/mediawiki/index.php5/Details:Climate

The meanings of those two fields are described in http://www.wufi-wiki.com/mediawiki/index.php5/Details:WET-File which matches what I said.

Unfortunately the description for WAC format isn't very helpful, but there's perhaps enough info in the other descriptions to puzzle things out.

TimSmall, climate data for Belgium isn't included in my version of WUFI 5.1 Light. I wish it was because I'm only a few miles inland from Dover so Ostend would probably work for me. Anybody got an Ostend data file?

You can get figures from (I think) ASHRAE for Gatwick for free, but it doesn't include any driving rain info, therefore it's only useful for modelling ventilated rainscreen type problems (e.g. wall with rainscreen, or ventilated flat or pitched roof arrangements). i.e. no good for most masonry walls.