[TRNSYS-users] Type 941 air-to-water heat pump, floor heating

[Gergely László Zsolt]

Dear All,

I am trying to simulate Type 941 air-to-water heat pump system (file Multizone_AWHP_V2_H&C_08.30_BP.idf), directly connected to floor heating and slab cooling, however the model does not work for some reasons. Trnsys message 441 comes up, saying that some listed inputs have not coverged during the simulation. It seems to occur escpecially in case of heating - the simulation does not even finish. However, in case of cooling the model seems to work - starting with June the simulation goes on until the first periods of heating.

Do you have any ideas what the problem could be and how to solve it?
Would really appreciate it!

Also, it is strange that it is the case for Budapest weather data, or all other that needs heating a lot. In case of Sydney weather, it seems to run properly (Multizone_AWHP_V2_H&C_08.26_massflow.idf). I am also attaching a file calculating the heat loads for a specific case (Multizone_AWHP_HeatLoads.idf), and the building itself (AWHP_V2_H&C_08.26.b18)

Hope you have solutions!
Thank you in advance,

Laszlo GERGELY
PhD student
Budapest University of Technology and Economics
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20210830/6012ba3a/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Multizone_AWHP_V2_H&C_08.30_BP.tpf
Type: application/octet-stream
Size: 328376 bytes
Desc: Multizone_AWHP_V2_H&C_08.30_BP.tpf
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20210830/6012ba3a/attachment-0004.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Multizone_AWHP_V2_H&C_08.26_massflow.tpf
Type: application/octet-stream
Size: 334563 bytes
Desc: Multizone_AWHP_V2_H&C_08.26_massflow.tpf
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20210830/6012ba3a/attachment-0005.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Multizone_AWHP_HeatLoads.tpf
Type: application/octet-stream
Size: 302442 bytes
Desc: Multizone_AWHP_HeatLoads.tpf
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20210830/6012ba3a/attachment-0006.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: AWHP_V2_H&C_08.26.b18
Type: application/octet-stream
Size: 34252 bytes
Desc: AWHP_V2_H&C_08.26.b18
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20210830/6012ba3a/attachment-0007.obj>