Problem with output for Qhs_sys_kWh and Qww_sys_kWh

[moaapplepie]

Hi!

I have a problem the past days with the CEA modelling, regarding the heating, Qhs_sys_kWh, and warm water usage, Qww_sys_kWh, output. Around hour 179, the heating has an unusual spike for a few hours with heating values almost 10 times larger than the average for that month. And at the time the heating spikes, I don't get any outputs for the warm water usage, Qww_sys_kWh, it is only zeros after hour 179 in the excel file with the demand output.
What could be the problem? I've revised the weatherfile which seems to work fine for other models, and also the use-type that I use, which has worked fine for other models, could you help me in how to proceed? Find attached the demand output file

Thanks for the help!

Total_demand_hourly.csv

[yiqiaowang-arch]

Hi @moaapplepie, I sometimes also encounter similar problem and it's sometimes due to some numerical errors within the RC model. In the output panel you might see something like "temperature out of bound". It would be nice if you could also share the logs of CEA. Also, which version of CEA are you using?