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Methane slip calculator
Methane Slip refers to the release of unburned methane from engines running on natural gas. While this can occur in both reciprocating gas engines (recips) and gas turbines, methane slip in recips are almost 150 times higher than that of a gas turbine.
This calculator can help you:
-
Estimate the total greenhouse gas (GHG) savings per year depending on your power plant output and capacity factor
-
Calculate reductions in NOx and particulate matter (PM) based on the US EPA's emission factors
-
Compare the amount of methane slip that can occur during the operation of reciprocating engines and gas turbines
The US EPA (Environmental Protection Agency) publishes Emission Factors for methane for various technologies, and these factors are used in this calculator.
Calculate energy & potential GHG avoided by gas turbine technology
Power plant output *
MW
Capacity factor (percentage hours in operation) *
%
Methane Slip refers to the release of unburned methane from engines running on natural gas. While this can occur in both reciprocating gas engines (recips) and gas turbines, methane slip in recips are almost 150 times higher than that of a gas turbine.
This calculator can help you:
Greenhouse gas (GHG) emissions reduced by your plant*
Potential methane avoided by using GE Vernova gas turbine technology
tons/year
reduction
Potential GHG avoided by using GE Vernova gas turbine technology
tons/year
reduction
Energy generated
MWh/year
This is equivalent to taking cars off the road.
Total emissions and savings
Total GHG** emissions (1000 t CO2e/yr)
Methane emissions (t/yr)
Almost 200x more methane!
PM** emissions (Total) (t/year)
NOx** emissions (t/year)
Learn more
- Aeroderivative vs reciprocating engines
- Gas turbines for municipalities and cooperatives
- Data center power solutions
- Islands and microgrids
- LM6000
- LM2500
**Key:
- GHG – greenhouse gases
- PM – particulate matter
- NOx – nitrous oxides
- CC – combined cycle
- SC – simple cycle
- GT – gas turbine
- RICE – reciprocating internal combustion engine
- NG – natural gas
- GWP20 – global warming potential for 20 years
Heat rates
kJ/kWh
GT Combined cycle
5,800
GT Simple cycle
8,800
Reciprocating engines
7,800
Coal
10,900
Notes & references:
Emission factors: US Environmental Protection Agency Air Emission Factors, AP42 Go to link
GWP20** of CH4:86: Intergovernmental Panel on Climate Change (IPCC) Go to link
*GHG emission calculations here do not consider the origin/source of the gas. The calculations reflected only consider the net effect of GHG emissions due to the difference in technology used at the point of combustion.
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EPA Emission Factors
| GT Combined Cycle | GT Simple Cycle | Reciprocating Engines | ||
|---|---|---|---|---|
| CO2 | lb/MMBTU | 110 | 110 | 110 |
| NOx | lb/MMBTU | 0.099 | 0.099 | 4.08 |
| TOC | lb/MMBTU | 0.011 | 0.011 | 1.47 |
| Methane | lb/MMBTU | 0.0086 | 0.0086 | 1.25 |
| PM (total) | lb/MMBTU | 0.0066 | 0.0066 | 0.00991 |
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