Dear TRNSYS-users,I would appreciate some clarification on the topic of applying user-defined CHTC's. I have a very simple two-zone project, with following main elements defined in the Simulation Studio:
- schedule with internal gains (20 W/m²) from 8-18h - schedule with increased ventilation (7 ACH) from 20h-6h, otherwise 1 ACH- schedule with CHTC for the ceiling, following the ventilation schedule, with values 8 W/m²K during increased ventilation and 0.5 W/m²K otherwise
- fixed CHTC for the floor: 2 W/m²K - multi-zone building model No climate file is used.In the building model, two zones are defined, and are separated by two identical "walls". At the front side, the CHTC for the floor is applied (as input in the bui model), at the back side, the CHTC for the ceiling is applied, also as input.
When I plot the surface temperatures TSI and TSO and the CHTC's HCONVI and HCONVO for the surfaces involved, the temperatures relate to each other as expected, but the CHTC's do not. I have included a sketch to clarify this. I also included the simple model in attachment.
Thank you your input! Sarah Leenknegt --ir. arch. Sarah Leenknegt - KU Leuven - Building Physics Section - Department of Civil Engineering - Kasteelpark Arenberg 40, bus 2447 - B-3001 Heverlee, Belgium - tel. +32(0)16321347
Attachment:
SimpleCaseCHTC.zip
Description: Zip archive
Attachment:
Sketch.jpg
Description: JPEG image
