Re: ?energy input by fluid of active layer to zone?

[Michaël Kummert <kummert@xxxxxxxxxxxxx>]

Here is a reply from Transsolar's hotline:

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Tomas

if you are really looking at this output there is something strange.
The outlet fluid temperature is calculated  with this equation:
TFLOUT_AL(58) =TFLIN_AL+QFLUID_AL(59 ) /(MFLOW_AL*CPFLUID)
Please check units.
For heating QFLUID_AL is negative
For cooling QFLUID_AL is positive

if this doesnt help please send the example to hotline@xxxxxxxxxxxxxx

with kind regards,

your TRNSYS Hotline Team

T.Welfonder, M.Rudolph

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on 2004-05-26 02:39, Tomas Persson wrote:

> Hi!
> I have used the built in active layers of type 56 to model floor heating 
> (slab on grade). I have a problem with the output nr 59 (QALFL energy 
> input by fluid of active layer to zone) it gives negative values, much 
> larger than the power going into the floor calculated externaly from 
> /input flow rate/, /input temperature/, and /output fluid temperature/ 
> from output 58 (TOFL fluid outlet temperature of active layer)
>
> What is output 59 supposed to calculate?
> What can be wrong?
>
> I use quite old versions of Prebid and Trnsys 15 (from 2000), due to the 
> fact that I started this project using these versions, and the fact that 
> I use Presim and that Presim is not updated for the latest Prebid-version
>
> Best regards Tomas Persson
> ___________________________________________________________________
>  
> Tomas Persson
> Doktorand
>  
> Centrum för solenergiforskning, SERC
> Institutionen för matematik, naturvetenskap och teknik, MNT
> Högskolan Dalarna
> 781 88 BORLÄNGE
>  
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>  
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> _ 
> <http://www.serc.se/>__________________________________________________________________


--
_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert@xxxxxxxxxxxxx

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