Have questions for unit change problem

old forum
1

I’m using the radiantion analysis for ladybug. But the radiation legend use the unit: KWH/M2.

I’m trying to change it to BTU/FT2. However the legend appears not correct… The numbers it come out are different from the numbers I got from the web…

The attach picture shows the translated numbers which should not be right…




2

Hi Xinyi, Is it a question about the accuracy of the conversion or radiation legend? Can you make your question clear and also tell us what are you exactly trying to do?

3

I’m sorry about that. Yes, it’s about the accuracy of the conversion. and I’m wondering how ladybug recognize the numbers as WH or KWH? Since I didn’t put a ladybug header, which it required, into the first panel.

Thanks a lot.

4

Xinyi Wu,

This is an issue with the way that I coded these components to recognize the various different types of energy/flux values (Wh, kWh, Wh/m2, or kWh/m2).

Because the units that you were plugging in were all lower-case, the component was not recognizing that you were trying to convert values of flux (kWh/m2) instead of just energy (kWh).

I just wrote in a more robust means of identifying your units so it should now work in your case (see components attached and on the github).

Thanks for pointing this out,

-Chris

FixedConverterComponents.gh (351 KB)

5

Chris,

Thanks! That’s very helpful.

I would try to plug that into the grasshopper.