Natural Gas System

To provide the pressurized natural gas (NG) utilized by the 20 MW_t CES combustor, a new high-pressure NG system was installed and commissioned in Sep 04. It included a natural gas metering station, 1,600 psig compressor skid (Fig 3) with ancillary pressure regulating/relief valves and a 0.3 micron filter. To provide the pressurized natural gas (NG) utilized by the CES combustor, a new 1,600 psig NG system was installed and commissioned in Sep 04. It included a natural gas metering station and gas compressor skid (Fig 3) with ancillary pressure regulating/relief valves and a filter.

In 2007, a new generation of CES combustors, the 170 MW_t gas generator, entered production and system acceptance testing was scheduled to be conducted at KPP. These larger combustors, however, needed far more NG volume than the existing KPP NG system could provide. Consequently, CES elected to expand the NG system's capacity via a blow-down system utilizing NG accumulators. This required acquisition of accumulators (fixed and trailer-mounted), a higher pressure (2,400 psig) NG compressor, new control valves, NG filters, and piping. The new system was installed in the spring and summer of 2008 and commissioned in Aug 08 (Fig 4-5).

Figure 3 - 1,600 psig NG Compressor Skid	Fig 4 - 2400 psig NG Compressor (blue frame)
Fig 5 - Fixed and Trailer-Mounted NG Accumulators	Fig 6 - 3-inch NG Pressure Control Valve and Filter