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

[Michael Bissett]

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 at 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 at 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
>>
>> _______________________________________________
>> TRNSYS-users mailing list
>> TRNSYS-users at cae.wisc.edu
>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>>
>>
>
>
> --
> *Àngel Carrera*
>
> *Responsable I+D
> Àrea tècnica*
>
> Sistemes Avançats d'Energia Solar Tèrmica SCCL
> C/ Roger de Llúria, 29 3r 2a 08009 Barcelona
> Tel: (+34) 93 342 47 55 Fax: (+34) 93 342 47 56
>
> angel.carrera at aiguasol.coop
> http://www.aiguasol.coop
>
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