Re: [TRNSYS-users] controller type 2

[David Bradley <bradley@tess-inc.com>]

Betrand,
  I think you are going to need to use two controllers. The first
controller will determine the flow rate of your collector loop in order
to maintain a collector outlet temperature of 70C. The other controller
will determine the flow rate on the load side of your heat exchanger in
order to maintain source side outlet temperature of 60C. I am also not
sure that Type2 is an appropriate controller model; Type2 models a
differential controller that has only two states: ON and OFF. In order to
modulate your flow and maintain an outlet temperature, you will need to
use a proportional or a PID controller. There are some solar collector
models in the TESS Solar Library that combine a variable speed pump,
controller, and collector and modulate the required inlet flow rate in
order to maintain an outlet temperature. 
Kind regards,
 David


At 01:50 5/10/2007, tchanche fankam bertrand wrote:
> Dear all,
> i am simulating a system that comprises a subsystem made of a colector
> loop(ETC collector, pump, flat plate heat exchanger ). i need to to keep
> the inlet temperature of the collector at 60C and the outlet temperature
> at 70C. 
> I would like to know if it is possible to control the system with type 2
> and how.
> Thank in advance for your help.
> yours,
>
>
> ------------------------
> TCHANCHE FANKAM Bertrand
>
> C/O SUH Christopher
> 22 kadmeas-BOTANIKOS
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