I’m reminded again about the importance of instrumentation.
Fuel metering – especially billing meters – are expected to be infallable. But I’ve just seen another case where the revenue class meter is not reading correctly. And this is not the first time this year this problem has come up.
It’s important to have backup metering for your fuel bill in order to know that your bill is accurate – and to help alert you to when any of your meters on site may need attention.
Often it’s the plant’s gas turbine meters that are required to be calibrated every year for emissions reporting… but the billing meter only gets looked at if someone asks. So, I recommend you keep tabs on those billing meters and if something looks strange – ask!
And, on a performance note – if your fuel flow metering is off, your reported heat rate will also be off. For some of you this is just an accounting problem, but for others, this may impact your dispatchability in the future.
I am available to help with fuel flow calculations, and have add-ins to support flow calculations and fuel properties within Excel. If you have any questions – please ask me, I’m here to help!