Re: [TRNSYS-users] indoor temperature is unstable

[Arian Bahrami <arianbhm@yahoo.com>]

Hi,

It is hard to say, normally you cant get the same values from TRNSYS at all for building simulation, there are many reasons why, besides different thermal mathematical modeling and boundary conditions, it seems you have shading device around the house, also improper material specification, and not using precise solar radiation terms (direct, diffuse, reflected) can lead to such huge discrepancy.    

Arian

Sent from Yahoo Mail for iPhone

On Thursday, July 15, 2021, 6:32 AM, 大大宝 via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:

Dear TRNSYS users, 

I am validating my model with a experimental room (room). The room has a floor heating system and I simulated the indoor temperature in the case of floor heating turning off. 

I input the collected weather data(weather1.txt) into the simulation (room.b18 & room.tpf). 

I compared my simulated indoor temperature with the measured one. I found that the simulated indoor temperature is unstable when the measured temperatures fluctuate similarly for each day (indoor temperature.png). I just don't known what would contribute to this mismatch when they shared the same weather condition. 

Have anyone faced this problem before? any ideas to figure out this mismatch?

I will very appreciate for any helps!

Regards,

Zhichen 

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