[TRNSYS-users] heating floor modeling with type 56 integrated component

[Antoine Gautier]

Dear all

 

I am trying to compare the results provided by the active layer model
integrated in Type 56 with manufacturer data.

 

Test case is simple.

·         Adiabatic walls without windows

·         No internal gains

·         No air flow rate (nor ventilation nor infiltration)

·         Infinite cooling power to maintain the ambient temperature at the
value used in manufacturer calculations (14°C) 

·         Heating floor precisely parameterized according to manufacturer
specifications (loops number, water flow rate, conductivity of insulation,
etc.)

·         QALFL gives me the total emitted power and QCOOL the power emitted
to the zone

 

Below is the result of the comparison at stationary conditions (plus a
sensitivity perform in TRNSYS on pipe wall conductivity and loops number).

 

	
Manufacturer

TRNSYS


Conductivity W/m.K

-

0.35

0.45

0.35


Loops number

3

3

3

1


Total emitted power W

9564

7776

7850

7819


Zone emitted power W

8980

7185

7254

7225


Water outlet temperature °C

23.8

27.7

-

-


Ratio zone/total emitted power

94%

92%

92%

92%


Gap on zone emitted power / Man.

-

-20%

-19%

-20%

 

Does the gap between TRNSYS and manufacturer data fall within the model
uncertainty or does it seem too high to you ? (~20% on power emitted to the
zone)

Perhaps I missed something in my test case


Or would you have any other advice to reduce the discrepancy ? (giving the
fact that input data uncertainties are very small in my case since I have
the detailed manufacturer specifications) 

 

Thanks a lot.

Regards

--

Antoine Gautier
Solamen
+33 6 98 78 56 46

antoine.gautier at solamen.fr

 

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