[TRNSYS-users] chilled ceiling application

[Δημήτρης Ξεύγενος]

David,
I am trying to define the cooling capacity of the ceiling panel. This could
be determined by the following equation:

Q=m*cp*(θout-θin)

I expected that changing the water flowrate and/or the water inlet
temperature , the program would give me as an output the fluid outlet
temperature (θout in the above equation).Using the above equation i could
obtain useful results for the expected thermal behaviour of such a system
(that is to say, if it does meet the cooling needs of the zone).

So , is there anywhere in the program the answer i am looking for (the fluid
oulet temperature)?

*Second thought*

The designers of the ceiling panels say that these systems are designed for
a temperature difference (of chilled water) about 2-4 K. If this is the case
for the program as well, I expected to define this temperature difference
somewhere in the program. Taking for granted that the cooling load equals to
cooling capacity of the ceiling panel, I could then determine the mass
flowrate needed.

Thank you for your answer.I hope I made clear the problem.Are there any
suggestions?

Best,
Dimitris

National Technical University Of Athens
School of Mechanical Engineering
Thermal Section

Στις 02 Μαρτίου 2010 12:36 π.μ., ο χρήστης David Bradley <
bradley at tess-inc.com> έγραψε:

 Dimitris,
>   Is it the cooling capacity of the chiller or of the ceiling that you are
> trying to define?
> Best,
>  David
>
>
> Δημήτρης Ξεύγενος wrote:
>
> Dear TRNSYS users,
>
> I am working on a solar cooling project using an absorption chiller and the
> new feature of TYPE 56 (regarding to chilled ceilings).
> How can i define the cooling capacity as i don't know the fluid outlet
> temperature?
> Moreover,when i have to define the wall with the cooled ceiling layer , it
> is obligatory to define some parameters that are obtained by the producer of
> the cooled ceiling (specific norm power,norm massflow, norm area, norm
> number of loops)
> Does this definition affect the cooling capacity i mentioned earlier?Could
> anyone send me these technical data from any producer available?
>
> Thank you in advance,
> Xevgenos Dimitris
>
> National Technical University Of Athens
> School of Mechanical Engineering
> Thermal Section
>
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