Re: [TRNSYS-users] Type 2b controller dead band problem.

[Michael Bissett <mikebiscuit@gmail.com>]

Hi

I have read the information, I have tried to increase parameter 1, I have also looped the controller to its self. Still it does not work

I have also tried changing many other parameters and have spent a lot of time on this problem. still with no luck.

Any other suggestions?

Mike

 

On Tue, Sep 20, 2011 at 1:59 PM, Angel Carrera <angel.carrera@aiguasol.coop> wrote:

Mike,

you should connect the output control function of the controller to its own input control function (Input number 4). Also, you should increase the value of parameter 1, to the default value at least (the influence of this parameter is explained at the type 2 documentation, I recommend you to read it, together with the generic section for controllers at the trnsys help)

Regards

Angel

2011/9/19 Michael Bissett <mikebiscuit@gmail.com>

Dear Trnsys

I am experiencing problems with a simple type 2b controller.

I am using a solar collector type 564b

I am trying to compare the temperature of the output of the collector with output of the tank, getting a temperature difference. I have set the dead band from 4-10 degrees C.

In the simulation as the temperature rises to 10degrees difference, the control signal is 1 switching the pump on correctly. but after this the controller only switches every time step. I have tried shortening the time step... and changing other parameters.. still with no success.

I have attached the file.

Yours Sincerely

Mike Bissett

Department of Electrical Engineering

University of Cape Town 

South Africa

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Àngel Carrera

Responsable I+D
Àrea tècnica

Sistemes Avançats d'Energia Solar Tèrmica SCCL
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Tel: (+34) 93 342 47 55 Fax: (+34) 93 342 47 56

angel.carrera@aiguasol.coop
http://www.aiguasol.coop