Thank you very much for all your answers, being : - Werner Keilholz and Vincent Coste : connect type 56 to a type 23 which sets a target temperature for automatic cooling and heating in type 56, giving the desired operative temperature ; - David Bradley : set up a HVAC system to pay attention to including operative temperature ; - Maarten Sourbron: compute T_corrected = 2*Tset-Tmsurf, with Tset = desired operative temperature and Tmsurf the mean surface temp which type56 gives as an output and set T_corrected as the target temperature for automatic cooling and heating in type 56. Until now, I have only tried the first solution and I still have got some problems to give type 23 correct parameters but I am investigating. Thanks for your help ! Héloïse Pelen ETAMINE
Visitez notre site web : www.etamine.coop ! De : Maarten Sourbron [mailto:Maarten.Sourbron@mech.kuleuven.be] Dear Héloïse, If you want to use the ideal heating and cooling option of type56, you can change the set point at wich you want to heat or cool. e.g. if you want to start heating at T_op=T_set=20°C, determine an input to type56 being T_corrected = 2*Tset-Tmsurf, with Tset = 20 and Tmsurf the mean surface temp which type56 gives as an output. It comes from T_operative = (T_air+T_mean_surf)/2, or with the symbols of above T_set = (T_corrected+Tmsurf)/2. So, instead of supplying the required operative temperature T_set as input, you supply the equivalent air temperature, so with T_corrected as air temp and Tmsurf as surface temp you end up with an operative temp = T_set. Works fine, with no numerical issues, only a small oscillation around T_set, but with a small enough time step, this is neglectable. Good luck, Maarten -- Departement Werktuigkunde-Department of Mechanical Engineering Katholieke Universiteit Leuven Celestijnenlaan 300A bus 2421 3001 Heverlee (Leuven) T : 0032 (0)16 32 28 73 F : 0032 (0)16 32 29 85 E : Maarten.Sourbron@mech.kuleuven.be From: David BRADLEY [mailto:d.bradley@tess-inc.com] Heloise, Dear TRNSYS users, The Type 56 uses a control on the air temperature « TAIR » to compute the sensible heat demand of each thermal zones. This temperature does not include the surface temperature and doesn’t fully describe the temperature actually felt by the human, body. Is there a way to control the operative temperature, rather than on the air temperature, in type 56 ? I thought about using Type 22 but the simulation seems rather unstable with more than on Type 22, and I would like to be able to control the operative temperature in each thermal zones. Thanks for your help ! Best regards, Héloïse Pelen ETAMINE
Visitez notre site web : www.etamine.coop !
_______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA
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