EnergyPlus calibration using GenOpt, objective function and errors.

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Hello,

I'm trying to write a paper about Calibration about Building Energy Model (EnergyPlus)

I have measured data (4,636.36kW) and Expected data (4,936.35kW)

And I'm trying to minimize the discrepancy to fit ASHRAE data.

(CVRMSE <15%, MBE<5% )

Here's my question.

1. Algorithm

Is it right to us GPSHookeJeeves?

1. Objective Function

I think i should input some data like 4,636.36 to find the best input parameter.

So how can I make those objective function.

I really need your answer.

Thanks for reading this