Re: [EnergyPlus_Support] Efficiency of Generator:MicroCHP

["Julien Marrec julien.marrec@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Try reporting at the detailed frequency:

Here's the sum:

Name
Generator Fuel HHV Basis Rate        2.312628e+06
Generator Fuel LHV Basis Rate        2.085836e+06
Generator Gross Input Heat Rate      2.085836e+06
Generator Produced Electric Power    5.450258e+05
Generator Produced Thermal Rate      1.290732e+06
Elec Power / Eff                     2.018614e+06
dtype: float64

Generator Gross Input Heat Rate = Generator Fuel LHV Basis Rate = (Generator Produced Electric Power / Generator Electric Efficiency)

There's a bit of a difference due to warmup, not sure why.

--
Julien Marrec, EBCP, BPI MFBA
Owner at EffiBEM
T: +33 6 95 14 42 13

LinkedIn (en) | (fr) :

2017-08-03 11:15 GMT+02:00 fpasserini.tn@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>:

 

I am considering the example file MicroCogeneration.idf

I think that Iâ??m misunderstanding the efficiency of Generator:MicroCHP

I have requested  some output variables more and in an excel file I have plotted EFFel as the ratio

Generator Produced Electric Power / Generator Gross Input Heat Rate

and the output

Generator Electric Efficiency

I would expect that they are the same, but they arenâ??t.

The same issue for the thermal efficiency.

I have attached the .xlsx file.

Best Regards

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Posted by: Julien Marrec <julien.marrec@xxxxxxxxx>

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