Chilled ceiling high room temperature Designbuilder

asked 2018-11-16 04:13:27 -0500

Aleck's avatar

updated 2020-01-20 12:04:22 -0500

Dear users, I found a problem when modeling chilled ceiling in DB, i don't know why my room temperature is always very high even when my chilled ceiling could deliver more than 100 W/m2(calculated with mass flowrate, temperature departure and return), and it's impossible according most of the chilled ceiling manufacturer. Where I made a mistake? Can someone help me? Kind regards Aleck

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I want to upload my model but it dosen't work, I don't understand. Maybe it's too large? About 7MB.

Aleck's avatar Aleck  ( 2018-11-16 04:14:44 -0500 )edit

@Aleck if attaching your model on UnmetHours is working, you could try saving it on Dropbox, Box, Google Drive, etc. and sharing the link to the model here for people to access.

Aaron Boranian's avatar Aaron Boranian  ( 2018-11-16 15:00:38 -0500 )edit

@Aaron Boranian, Thanks, it's not easy for me to use Dropbox now. Here below is hte link to access : By the way, the weather data file is China Hangzhou downloaded from Energyplus Weather website: Hope that you and anyone else can spare time checkout my model. Kind regards Aleck

Aleck's avatar Aleck  ( 2018-11-20 23:46:54 -0500 )edit

Furthermor, I can't understand why there are many ceiling surface while look deep into the EnergyPlus file? By the way, i'm not familier with EnergyPlus IDFeditor. But i'm sure that it's not normal because there are only 2 spaces and i defined 1 thermal zone in DB. So there is only 2 ceiling surface. Only one reason can explain that : Circle Window in ceiling(roof) which cut the ceiling into multiple "sub-surface".

Aleck's avatar Aleck  ( 2018-11-21 00:35:54 -0500 )edit