Many pipelines utilize system chromatographs at delivery locations. The energy content of the gas delivered can have a significant time skew from the chromatograph. Therefore, the energy content of the gas at a delivery point may differ significantly from its associated system chromatograph. On lean burn engines with tight emission controls, changes in the energy content of the fuel gas can significantly alter the amount of air required to maintain emissions compliance. A reliable, low cost, and fast responding energy meter is desired for both scenarios described. Four Energy Meters are evaluated...
Many pipelines utilize system chromatographs at delivery locations. The energy content of the gas delivered can have a significant time skew from the chromatograph. Therefore, the energy content of the gas at a delivery point may differ significantly from its associated system chromatograph. On lean burn engines with tight emission controls, changes in the energy content of the fuel gas can significantly alter the amount of air required to maintain emissions compliance. A reliable, low cost, and fast responding energy meter is desired for both scenarios described. Four Energy Meters are evaluated with six different gas compositions representative of gas compositions encountered on natural gas pipelines. The Energy Meter data is compared to a Micro GC to assess accuracy. After evaluation of the Energy Meters the same six gas compositions were operated in a CFR engine to measure methane number. The measured methane numbers are compared with methane numbers computed from energy meter data.