Flexbility analysis expansion case 1

[RadiateurFou]

Hello,

Flexibility analysis : I have an operating case OPE1 = T1 + W + P1 and another one OPE2 = T2 + W + P1.

I get two expansion cases : EXP1 = OPE1 - SUS and EXP2 = OPE2 - SUS

I then can get a final expansion case to get the full range case between T1 and T2 : EXP3 = EXP1 - EXP2.

What is the difference between EXP3 and just doing OPE1 - OPE2 directly?

(Example above is just here to illustrate)

Thanks in advance

 

[RVAmeche]

I think they should be the same. By default Caesar II will populate a load case similar to your last method (OPE1 - OPE2) which I've used for worst case scenarios of operating temps to shutdown temps in the winter or other large swings.

Out of curiosity I ran a quick test doing it the first way you suggest (EXP1 - EXP2) and the code stresses seem to be identical. But I don't see a reason to do it that way vs just directly from operating cases.

 

[RadiateurFou]

But it's not though. I've tried it on my current model, and i've got completly different stresses

 

[RadiateurFou]

Nevermind! It gave the same results i forgot to switch from sus to expe when doing the final case... Sorry for useless post

 

[RVAmeche]

Happens to the best of us