<I would need a component that can be used for diverting return flow rate from a cooling coil so that part of it goes back to the cooling source and part is mixed with the inlet flow rate. The idea is to keep the cooling fluid inlet temperature at its set point. (Please see the attachment!). So in a way you could say that it’s a reverse application for a tempering valve. I have tried to implement this combining a flow diverter (Type 11f), a flow mixer (type 11h) and an iterative feedback controller (type 11h). However I it seems to be very difficult to get the controller to work properly and without convergence (Is it possible at all?). So my question is that what would you suggest to be the best way to do this? Can this be done with the basic TRNSYS components (e.g.type 11f), or is there a component in some TESS library that is designed for this kind of situation??>
Our tempering valve controller (Type 953 in TESS Controls Library) has modes for heating applications and cooling applications - so it should work well for your project.
Jeff
--- Jeff Thornton President - TESS LLC 22 N. Carroll Street, Madison WI USA 53703 Office: (608) 274-2577 Fax: (608) 278-1475 www.tess-inc.com E-Mail: thornton@tess-inc.com
On 11/12/2013 12:06 pm, santeri siren wrote:
Dear Trnsys users,
I would need a component that can be used for diverting return flow rate from a cooling coil so that part of it goes back to the cooling source and part is mixed with the inlet flow rate. The idea is to keep the cooling fluid inlet temperature at its set point. (Please see the attachment!). So in a way you could say that it’s a reverse application for a tempering valve.I have tried to implement this combining a flow diverter (Type 11f), a flow mixer (type 11h) and an iterative feedback controller (type 11h). However I it seems to be very difficult to get the controller to work properly and without convergence (Is it possible at all?).So my question is that what would you suggest to be the best way to do this? Can this be done with the basic TRNSYS components (e.g.type 11f), or is there a component in some TESS library that is designed for this kind of situation?Best regards,Santeri SirenProject engineer, M.ScSkanska Talonrakennus OyBuilding systems and EnergyPL 11400101 Helsinki, FinlandStreet: Nauvontie 18Phone +358401365633