|
Christian, It sounds as though the connection from Type80 to Type56 is correct (in TRNBuild, you indicate that the outside convection coefficient for a wall should be an INPUT and you give the input a name such as HBACK3, then you connect some model to the new Type56 input). You might need to have a look at the inputs to Type80, however. Type80 takes the surface temperature and the surrounding air temperature and computes a convective energy transfer coefficient so you would need to go back in to TRNBuild and add an output for the outside surface temperature of your wall, then pass the new Type56 output to Type80. You can repeat the process with multiple instances of Type80, one for each of your different surfaces. A word of caution, however! Type80 computes a convection coefficient based on that natural convection dominates. On outside surfaces, forced convection from the wind almost always dominates the heat transfer. You might be better served finding a correlation that computes a forced convection coefficient instead. Best, David On 8/23/2013 06:52, Brembilla Christian
wrote:
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |