Power Plant Application Engineering

Where have you looked, so far?

Have you searched for plug and play "excel template that calculates the consumption Mscf/Mscm of compressed natural gas; kW/kWhr of output power; heat rate etc of different sizes (starting from 1MW) of gas engines and turbines."

Yeah. I ain't giving it away, Dude.

REALLY WOULD HAVE APPRECIATED SOME HELP.

Ask the makers of gas engines and turbines to supply you with the desired information.

Going here: Search GlobalSpec and entering gas turbines yielded 3,498 results for "gas turbines"

Here is some help: (1) Typical gas-fired plants have a thing called a "ROC" which transmits several things to the control room for each unit in the plant. This is mandatory to have for air monitoring, but even if not, there is a flow meter showing instantaneous flow-rate in scfm, along with the analysis that shows the lower heating value of the gas in BTU/scf. The combination of these two numbers gives you the burn rate in MMBTU/hr (conversion factors and pay attention to units). The load on the unit, along with all pertinent ambient conditions, and auxillary power consumption leads you to Gross Power Output, and Net Power Output, in kW. The ratio of MMBTU/hr to Power Output (again pay close attention to units) provides Gross Heat Rate, and Net Heat Rate. This is simple enough, even I can do it.

Correlate your Heat Rates with various other observation such as ambient conditions, cleanliness of any condensers, etc.

XTC.....

If you are actually going to purchase a gas turbine or engine, the best source of information is the manufacturers. They have charts, tables etc for the "heat rate" of and design fuel consumption of their products.

A comparison spreadsheet can be easily developed comparing various vendors.

Please note that all quoted figures are commonly based on ISO conditions. You must correct for the elevation, ambient temperature, assumed humidity etc for your particular conditions.

You must also consider turndown and "part load efficiency" in your evaluation.

Gas turbines, although highly efficient, are sensitive to the installed elevation. Gas engines come in limited sizes.

Usage of waste heat is also a big consideration....