[TRNSYS-users] problem with differential controller

[Amirreza Heidary via TRNSYS-users]

Dear All
I'm using a 5 collectors in series with a differential controller to turn
on the pump when the difference of collector outlet and inlet temperatures
is more than 5 and turn it off when it is less than 2.But the signal and
collector output temperatures are fluctuating too much, also the signal is
not compatible with temperature variations.as you can see in the following
diagram, the signal is 1 when the outlet temperature is at maximum !
(red line is collector outlet temperature and orange line is the controller
signal)
[image: Inline image 1]
[image: Inline image 2]

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*amirrezaheidary*
*master student of energy systems Engineering*
*Sharif university of technology*
*Tehran-Iran*
*E-mail address*:

heidari at energy.sharif.edu

a <sm_mousavi at pwut.ac.ir>mirrezaheidarysbu at gmail.com

*P* *Save a tree... Please don't print this E-mail unless you really need
to.*








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