Units are not compatible

[Vverweij123]

What goes wrong here?

 

[koen123]

HELP!

[LucMeekes]

For one thing: A is undefined.

And.... you are aware that the result of what you wrote, if possible to be evaluated, is either TRUE or FALSE...?

Please attach the worksheet. You may have to .ZIP it first (In Windows explorer, with the right-mouse mouse button choose 'Send to" then 'compressed (.zip) file')

Success!

Luc

[LucMeekes]

Verder staat er onder de onderste breukstreep een verschil van T2max en Tomgeving*(som van twee lambda's).

De beide T's hebben eenheid °C, en de lambda's hebben een eenheid van W/m/K.

Je probeert dus iets met de eenheid van, op z'n best, W/m af te trekken van iets met de eenheid °C. Dat gaat niet werken.

Je eenheden kloppen niet en/of de formule klopt niet.

Succes!
Luc

[ValeryOchkov]

Ops! I can read Holland!

May be this is any help

Stationary thermal conductivity without of inner sources of heat

Or this

Stationary thermal conductivity without of inner sources of heat - Infinite planar two-layer wall

[Werner_E]

Are you looking for something like this (note the pair of paranthesis, otherwise you have a unit mismatch in the denominator):

BTW, are you using two different accounts - Vverweij123 and koen123 ? Both were created at the same time and both have the suspicious "123" in the name. You should use just one account!

[Fred_Kohlhepp]

Werner's right!  See attached.

[Werner_E]

Maybe a numerical solve block is the better way to deal with the problem