Adnan,
If the flow rate is proportional to the ambient temperature then
there are some models in the TESS Controls library that you can
use (Type1250 for example). If you are doing feedback control (in
other words comparing a temperature to a desired temperature and
implementing a controller whose signal is proportional to the
difference between the two as well as to the integral of the
error) then there are some model in the standard controls library.
You might look at Types 22 and 23. PI and PID control can be a
little tricky in TRNSYS because we discretize time into time steps
that are quite long in comparison to the rate at which true PID
control samples and adjusts a control signal. I would recommend
looking at the PID example and documentation for some hints on how
to set it up.
kind regards,
David
Hi everyone,
I am using a hot water storage tank in which hot water is coming from the heat pump. From the hot water storage tank to building flow rate was controlled by PI controller in experiment giving some p and i values. The system works in this way: when more heating is needed and outside temperature goes down, more flow and less heating needs less flow coming from the storage tank . I am confused which controller I should use in this situation? or do I need to write an equation??
Thanks--
Adnan
_______________________________________________ TRNSYS-users mailing list TRNSYS-users@lists.onebuilding.org http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 3 North Pinckney Street - suite 202 Madison, WI 53703 USA P:+1.608.274.2577 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com