WUFI

Hi: I want to estimate the heat stored in building components to see the difference between walls with influence and no influence of rainfall, in WUFI Plus. A way I can think of is using the formula of change in energy content during a time interval (hourly in this case),something like ΔQ*Δt=ρ*A*Δx/...

Hi:

Here is a link for Singapore weather data from NUS: https://inetapps.nus.edu.sg/fas/geog/Default.aspx

Look under "Data Archive". It has the basic variables, but it just includes one value for radiation which is likely to be global horizontal irradiance.

I hope this is useful.

Hi: In the results report of WUFI Plus, I would like to know how you calculate the values for "opaque areas" in the "Energy Balance" table. I am trying to obtain these from the sum of heat gains/losses at all indoor surfaces of the zone (except windows), the results are of simila...

Thanks mwinkler! In relation to changes in WUFI plus 3.0.3, I also have a doubt about the units for moisture sources in building components. In version 3.0.0 input of moisture sources works in kg/s m2 instead of the shown unit kg/h m2 (See: http://wufi-forum.com/viewtopic.php?f=13&t=1120&p=3...

Hi: I would like to ask how does the "shading calculation" works in WUFI Plus, particularly if there are differences in stability and results for the given options ("preprocess results" and "every time step"). I am comparing different cases of a simple building model (i...

Thank you very much for both responses. Together they helped me to understand.

Now I can plot these diagrams for individual months, which is why I wanted to know how the values are calculated.

Hi: How do you calculate the values in the graph of Driving Rain Sum [mm/a] in the "Analyze" section of the "Weather Data"?. Using the same climate data of the WAC file, I am trying to replicate the graph in excel, the trends in prevailing orientations are similar the but the sha...

Is it correct to say that all the negative moisture fluxes at external and inner surfaces of a component are evaporating water? and the values in g/(h m2) are in themselves the evaporation rates per m2?

Your help will be appreciated.

Hi: I am using WUFI plus to simulate a simple building with wet exterior surfaces (e.g. by rain, by water spraying, etc) in order to measure the evaporative cooling effect. I want to compare the resulting temperatures of the building surfaces and the amounts of water that are evaporated under divers...

Good news. Thank you!

Hi: I am simulating roof and walls with a thin water layer to see the effect of evaporative cooling, in WUFI PLUS V 2.5.4.0. For this, I defined a fictitious material with a "transient moisture source" spread over its "whole layer", detailing water amounts in a txt file. In the &...

Thank you for your reply Daniel. I understand what you explain, but there is one detail that I still cannot solve in WUFI light: How can I keep the exterior surface of a material constantly wet? (for example, a thin water layer over a brick wall during 6 hours, not only the water that may absorb fro...

Hi, I am interested in measuring the evaporative cooling effect over exterior surfaces of buildings when they are wet (eg. by rain or water spraying), and how this influences the indoor spaces. I am more interested in the resulting temperatures of the surfaces of building elements more than in their...