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Jason,<br>
You are not the only person to have run into this quirk. It is not
intuitive but when you change the units of an input (by selecting Pa
instead of atm in your case), TRNSYS does not insert an automatic unit
conversion into your input file. The fan model is still expecting its
pressure input in atmospheres and the weather data component is still
providing pressure in pascals. What you need to do is to insert an
equation into your input file to convert from Pa to atm. Changing units
by selecting something from a pulldown menu in the Studio has an effect
only at the interface level - when the interface writes the input file,
it makes all the conversions back again. It is safe to change the units
of parameters and it is safe to change the units of <i>unconnected </i>inputs.<br>
Kind regards,<br>
David<br>
<br>
<br>
<br>
jason chan wrote:
<blockquote
cite="mid:f3971b460901091645l1ff2b3e0m3387cb837d2e8820@mail.gmail.com"
type="cite">Hi,<br>
<br>
I do not know why TRNSYS give me error when I made the
connection between the atmospheric pressure and the inlet air pressure
for the fan (type 662-2). Here I attach the component in this email.
Thank you<br>
<br>
<br>
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