System and method for emissions testing a compressor, turbine, or engine
AssigneeNearshore Natural Gas, LLC
InventorsDaniel P. BIELEFELDT, Aaron J. HILBER
Life of this patent
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Abstract
A mobile compressed natural gas (CNG) vessel and unloader are used to supply CNG to a compressor during regulatory emissions testing of the compressor (e.g., U.S. EPA's Quad J testing). CNG output by the compressor is recirculated to an inlet of the unloader so that it is reused during the emissions testing. Lean CNG from the vessel may be used to power the compressor during the testing. The unloader ensures that the compressor is run at at least a predetermined load factor during the emissions testing.
Claims18
A method for testing a compressor, the method comprising:
- transferring compressed gas from a storage vessel of a mobile compressed gas storage system to an inlet of a compressed gas unloader;
- recirculating at least a portion of the compressed gas received by the unloader between the unloader and a compressor, said recirculating comprising:
- reducing, via the unloader, a pressure of compressed gas received at the inlet of the unloader,
- transferring the reduced pressure gas from the unloader to an inlet of the compressor,
- recompressing, via the compressor, the reduced pressure gas received from the unloader, and
- transferring at least a portion of the recompressed gas back to the inlet of the unloader;
- and
- during the recompressing, conducting emissions testing on the compressor.
A system for emissions testing a compressor, the system comprising:
- the compressor, the compressor having an inlet and an outlet;
- a mobile compressed gas storage system including a compressed gas vessel supported by a wheeled frame, the compressed gas vessel containing compressed gas at a supply pressure;
- and
- an unloader having an inlet and an outlet, the inlet of the unloader being fluidly connected to the vessel and the outlet of the compressor, the outlet of the unloader being fluidly connected to the inlet of the compressor,
- wherein the system is configured to recirculate compressed gas through the unloader and compressor during emissions testing of the compressor.
Dependencies are inferred from the claim text.