Sweeny Cogen Facility
Phillips 66Brazoria County
Sweeny Cogen Facility is a four-unit natural-gas cogeneration plant beside Phillips 66's Sweeny refinery in Brazoria County, Texas. EIA's May 2026 inventory reports 572 MW nameplate, 436 MW net summer, and 504 MW net winter capability. Three turbines entered service in 1997 and the fourth in December 2000. Phillips 66 increased its ownership to 100% in 2014; its current subsidiary list includes Sweeny Cogeneration LLC. The facility supplies electricity and process steam to the refinery and exports merchant power into ERCOT.
Mapped infrastructure geometry associated with this asset.
EIA May 2026
EIA inventory for Sep 2026
EIA May 2026
100% ownership since 2014
EIA plant 55015 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combustion Turbine | Operating | 143 | Unknown |
| GEN2 | Natural Gas Fired Combustion Turbine | Operating | 143 | Unknown |
| GEN3 | Natural Gas Fired Combustion Turbine | Operating | 143 | Unknown |
| GEN4 | Natural Gas Fired Combustion Turbine | Operating | 143 |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| GEN1 | 143 MW 109 MW summer | Natural Gas Fired Combustion Turbine GT | Aug 1997 | Operating |
| GEN2 | 143 MW 109 MW summer | Natural Gas Fired Combustion Turbine GT | Sep 1997 | Operating |
| GEN3 | 143 MW 109 MW summer | Natural Gas Fired Combustion Turbine GT | Oct 1997 | Operating |
| GEN4 | 143 MW 109 MW summer | Natural Gas Fired Combustion Turbine GT | Dec 2000 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
EIA reports August 1997 for GEN1.
Phillips 66 filing
| Unknown |
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
4 ERCOT market resources · Gas turbine
Capacity factor is average output vs. this plant's observed peak.
Observed ERCOT settlement prices at BRP_SWNY_RN over 365 days (2025-10-27 to 2026-10-26). This plant is also crosswalked to SCLP_PUN1, SCLP_PUN2, SCLP_PUN3, SCLP_PUN4, SCLP_SCLPC_1, SCLP_SCLPC_2, SCLP_SCLPC_3, SCLP_SCLPC_4; the point with the deepest price history is shown.
The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services and any physical dispatch constraint. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator GEN2 with this operating date.
EIA reports October 1997 for GEN3.
EIA reports December 2000 for GEN4.
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Sweeny Cogen Facility reports 572 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
Sweeny Cogen Facility is a Natural Gas Fired Combustion Turbine facility in Brazoria County, TX, participating in the ERCOT market.
Sweeny Cogen Facility is in Brazoria County, TX, inside the ERCOT balancing area.
Sweeny Cogen Facility is operated by Sweeny Cogeneration LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Sweeny Cogen Facility reported 2,946.7 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Sweeny Cogen Facility ranks #71 of 829 operating plants of the same technology nationally. It ranks #3 of 78 in TX.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
