[TRNSYS-users] Type 60 in TRNSYS 16: parameter values for parameter 41 and 42 ???

[David BRADLEY]

Prof Sommer,
   For the case of no fins (ie no contact resistance) and no 
pipe-in-pipe configuration, parameters 41 and 42 have the same value; 
that of the thermal conductivity of the heat exchanger material (copper 
probably). Type60 does not decrease the volume of the nodes by the fluid 
volume occupied by the heat exchanger. It assumes that the heat 
exchanger volume is small in comparison to the tank volume. The storage 
tank in the TESS Storage library does remove the volume of the heat 
exchanger from the volume of each tank node and may be more appropriate 
for tanks that contain large heat exchangers.
Kind regards,
  David


On 11/24/2012 04:41, Prof K Sommer wrote:
> Hi,
>
> I try to simulate the buffer tank, details of that are attached, with 
> type 60 in TRNSYS 16.
> My questions to the parameters 41 and 42:
> What exactly covers "Heat exchanger wall conductivity" and what would 
> be the right input value for this parameter if there is only a single 
> pipe hx without fins and without pipe-in-pipe solution?
> And how does the model handle the 60 liter water volume inside the 
> pipe hx from time step to time step if the DHW usage is every hour at the
> beginning around 30 to 50 liter per min.?
>
> Many thanks in advance.
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

-- 
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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P:+1.608.274.2577
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d.bradley at tess-inc.com

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