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Re: [TRNSYS-users] min flow rate active layer
Elena,
Even in a real system, you would need to make sure that there is a
minimum flow through the floor when there is a call for heat. Otherwise
the flow will be laminar and you will not get any decent heat transfer
between the fluid and the floor. I think what you will need to do in
your simulation is to have the flow start at the minimum allowable flow
rate when there is a call for heat and then vary up to the maximum rate.
There is an example located in ..\Trnsys17\Examples\Feedback
Control\SunSapce - Floor heating PID controller.tpf showing how you
might set up your controller.
Kind regards,
David
On 7/7/2014 07:38, elena.bee@libero.it wrote:
Hi everyone!
I hope somebody can help me with this issue…
In active layer there is a minimum mass flow rate and it's not allowed to go
under that value, so how can I simulate a variable system, where the mass flow
is controlled by a thermostat and it varies linearly from zero (no heat is
required) to 1 (maximum flow rate-project value). When the coefficient is near
zero, the flow is too low and it gives error… Is there a solution?
Thanks in advance
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David BRADLEY
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Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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