[TRNSYS-users] Decrease of temperature with Type 56

[Augustin CUQ]

Dear all,

I sent a mail two weeks ago to expose the problem I had but it was not very
clear. So I have made an Excel file to illustrate it.The model has been
simplified.

It represents a two rooms building, with no internal gain. The outside
temperature remains constant to 0°C and all the other parameters used by the
.bui are equals to a default value: 0.
The only parameter which is a variable input of the model is a heating
power. It remains constant until the steady state is obtained and then it is
put to 0.

The variation of the temperature, for the three time steps following the
stop of the heating device seems to be weird. The decrease of the
temperature is very fast, then it increases (???) before going down with an
acceptable derivative value (around 0.3°C/hr).
Find attached the model I have used.

Can anyone explain to me the reason of this phenomenon?
Thanks in advance.

Best regards.

-- 
Augustin CUQ
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