Flexibility and early planning keys to El Centro repowering success
Journal Article
·
· Power Engineering (Barrington)
OSTI ID:46003
The utility postponed gas turbine selection until signing the turnkey contract. This and other innovative strategies described in this article allowed planners to postpone contract commitments until after licensing approval and drive overall project costs down. Participants in the Imperial Irrigation District`s (IID) El Centro Unit 2 Repowering Project formulated an approach to repowering that provided exceptional flexibility and continuity. As a result, the utility kept the project`s overall costs within the projected $59.5 million budget, and the repowered unit met all performance expectations. A municipal electric utility, IID serves Imperial County and a portion of riverside County in Southern California. With a record peak demand of 620 MW, IID is California`s sixth largest electric utility. Gas and oil-fired steam and combined-cycle units, low-head hydroelectric units and peaking gas turbines constitute the utility`s on-system generation resources. El Centro Unit 2 was originally commissioned in 1952 as a natural gas and residual-oil-fired steam unit with a net rating of 32 MW. The steam turbine-generator is a non-reheat, single cylinder, Allis-Chalmers machine with throttle conditions of 850 pounds per square inch gauge and 900 F. Plans for the repowering called for retiring the existing boiler and replacing it with a new, unfired heat recovery steam generator (HRSG). Detailed engineering and procurement began in July 1991, and on-site construction began in January 1992. To maintain project continuity and to control costs, IID decided on a turnkey engineering, procurement and construction (EPC) approach to the project.
- OSTI ID:
- 46003
- Journal Information:
- Power Engineering (Barrington), Journal Name: Power Engineering (Barrington) Journal Issue: 4 Vol. 99; ISSN POENAI; ISSN 0032-5961
- Country of Publication:
- United States
- Language:
- English
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