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Re: [TRNSYS-users] Controler Advice for evaluating Solar Radiation?



Jeff,

You are right, the monitored value won't change as temperatures do. I will check on your solution. Thank you very much.

Best regards,
Javier

2017-06-02 9:52 GMT-04:00 Jeff Thornton <thornton@tess-inc.com>:
Javier,

Since the value you are watching won't change with the control decision, you don't need a controller with hysteresis.  I would simply use an equation:

Glim = 1000
_On_Controller_ = GE(IncidentRadiation,Glim)

where the incident radiation is an input to the equation component.

Jeff - TESS

Sent from my iPhone

> On Jun 2, 2017, at 8:27 AM, Javier Vega via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:
>
> Hello TRNSYS users,
>
> I want to set a control strategy for my system based on the amount of solar radiation on a certain surface. It is simple, if the total radiation on the surface is below a Glim, I need the controller to output 1. If the total solar radiation is above Glim, set 0. The controller output will be used to divide a certain flow.
>
> Which controller would you recommend? Is the differential controller Type 2d (Generic) convenient for this case? I'm using the succesive substitution method.
>
> Thanks in advance for your advice,
> Javier Vega
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