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Condensing turbine
#9
You have not understood it well.  Please read the documentation, section 4.1 Combined heat and power.

NCAP_CEH absolutely must be specified with a reasonable non-zero value if NCAP_CHPR(UP) is used.  This is so because for the flexible operation range, the efficiencies are only valid for one point on the constant fuel line, and if you do not specify NCAP_CEH or set NCAP_CEH=0, then the efficiency would be constant on that line, which makes no sense.

You claim in the Excel file that the process should consume 23.20701 units of input in 2018.  But that would be true only if the CHP process would be a fixed CHPR back-pressure technology!  I just tested with exactly with the parameters you show in your Excel file, but with a fixed CHPR=3.1663266, and indeed I got 23.20701 in the results for the input fuel, just like you expected. The total CHP efficiency is then only 68.3%.

What you don't seem to understand is that a pass-out condensing turbine CHP works differently, and you are specifying a much higher CHPR(UP)=5.287, and NCAP_CEH=0, which means that your CHP mode efficiency is as high as 103%, simply because the electrical efficiency is 16.4% and the full CHP mode output is 6.287 times the electrical output. This should have been be quite obvious to you, and so I can only suggest to read once again the documentation, section 4.1 Combined heat and power.

BTW: I tested exactly with the parameters you show in your Excel file, but I cannot reproduce your results. Therefore, it seems that the results you showed are not even based on the same input data.  Anyway, I am not getting any dummy imports.  So, I cannot confirm any of your findings.
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Messages In This Thread
Condensing turbine - by JozefO - 07-10-2021, 01:23 PM
RE: Condensing turbine - by Antti-L - 07-10-2021, 02:30 PM
RE: Condensing turbine - by JozefO - 07-10-2021, 02:48 PM
RE: Condensing turbine - by Antti-L - 07-10-2021, 03:07 PM
RE: Condensing turbine - by JozefO - 07-10-2021, 03:47 PM
RE: Condensing turbine - by JozefO - 07-10-2021, 07:25 PM
RE: Condensing turbine - by Antti-L - 07-10-2021, 10:46 PM
RE: Condensing turbine - by JozefO - 08-10-2021, 08:13 PM
RE: Condensing turbine - by Antti-L - 08-10-2021, 10:08 PM
RE: Condensing turbine - by JozefO - 08-10-2021, 11:23 PM
RE: Condensing turbine - by Antti-L - 09-10-2021, 08:50 PM
RE: Condensing turbine - by JozefO - 09-10-2021, 09:44 PM
RE: Condensing turbine - by Antti-L - 09-10-2021, 10:30 PM
RE: Condensing turbine - by JozefO - 11-10-2021, 03:13 PM
RE: Condensing turbine - by Antti-L - 11-10-2021, 05:00 PM

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