Chilled/heated concrete slab ceiling

[KarinaA]

Hi all,

I am modelling a building i HVAC (version 6.0.3) which is cooled/heated in a quite sofisticated way. The floors/ceilings is made up of a concrete slab which has embedded pipes. Water is running through the pipes, keeping the temperature between 18 degC (summer) and 22-23 degC (winter), which means that the building is heated during the winter and slightly chilled during the summer (using free cooling from a nearby lake).

It doesn't seem like the chilled ceiling-function in HVAC will provide a good solution since it handles another type of cooling.. and for the heating case?

Does anyone have an idea of a solution?

Best Regards,
Karina

PS. I added a picture of the actual ceiling so you'll get an idea of what it looks like.

[ZapBran]

There's a (poorly formatted) FAQ that might help on the IES support area:
http://www.iesve.com/Support/Knowledge- ... sectionId=

I think they could do with updating it a little but it might help.

[rohanrawte]

You can find a good article of how this can be done here: http://www.cbe.berkeley.edu/research/pd ... ummary.pdf

Hope this helps,

Rohan

[KarinaA]

Hi guys,

I also found out the cooling/heating effect for the slabs so I figured that I can use a direct acting heater and vary the effect according to the outdoor temperature, using a ramp function. This will make things easier but will only work since I already know the effect. Lucky me. However, your tips were very useful! Thanks!

Regards,
Karina