PTC4 corrected efficiency calculation
PTC4 corrected efficiency calculation
(OP)
When I use PTC 4 to calculate the boiler efficiency, I always perform a tested efficiency calculation and a corrected calculation and then compare the two efficiencies to make sure the difference is below 2% since we always pick a test fuel close to the design fuel.
There is a different opinion. For oil & gas boiler, the natural gas property will not vary much, therefore, no need to take fuel sample and analyze it. So it is ok to use the design fuel analysis directly and only work on a corrected efficiency calculation. Is this acceptable?
Also, is it acceptable to use the measured fuel flow rate in the calculation directly without iteration?
Thanks a lot for your help!
Bing
There is a different opinion. For oil & gas boiler, the natural gas property will not vary much, therefore, no need to take fuel sample and analyze it. So it is ok to use the design fuel analysis directly and only work on a corrected efficiency calculation. Is this acceptable?
Also, is it acceptable to use the measured fuel flow rate in the calculation directly without iteration?
Thanks a lot for your help!
Bing





RE: PTC4 corrected efficiency calculation
Regards,
athomas236
RE: PTC4 corrected efficiency calculation
RE: PTC4 corrected efficiency calculation
I am reviewing a performance test procedure at the moment with oil being supplied from a refinery local to the plant and no one has even suggested not taking fuel samples for analysis.
Regards,
athomas236
RE: PTC4 corrected efficiency calculation
RE: PTC4 corrected efficiency calculation
RE: PTC4 corrected efficiency calculation
When I have tested gas fired plant, we had high quality tariff meters that incorporated gas chromography which gave composition and calorific values at 15min intervals, so we used this.
For gas sampling, there may be some ASTM standards.
Regards,
athomas236