HomeMy WebLinkAbout~Master - Contract for Evaluations of Combustion Turbine No. 2 Heat Recovery Steam Generator Concept RESOLUTION NO. 22-655
RESOLUTION AWARDING CONTRACT FOR EVALUATION OF COMBUSTION
TURBINE #2 HEAT RECOVERY STEAM GENERATOR CONCEPT
FOR THE ELECTRIC SERVICES DEPARTMENT
FOR THE CITY OF AMES,IOWA
WHEREAS, the City's Electric Utility operates two combustion turbines (CTs) at the
Dayton Avenue substation. CT#2 was installed in 2005 and is capable of generating 29 megawatts
of electricity. These CTs operate by firing fuel oil to rotate a turbine, which is connected via a
shaft to a generator. With some infrastructure modifications, the units could be converted to
operate using natural gas. These units are used at times of peak electric demand, for backup when
other infrastructure has failed,and to meet the utility's obligation to have generation capacity equal
to 110% of its historical peak electric load; and,
WHEREAS,both existing CTs are a simple-cycle design,meaning the heat generated from
the combustion process is exhausted to the atmosphere; only the rotational energy of the turbine is
used to generate electricity. This contrasts with a "combined-cycle" process, where the energy
from the exhaust gas heat of combustion is extracted and used to increase the total power output
of the unit, thereby decreasing the cost to produce energy; and,
WHEREAS, the generator component of CT #2 has a greater potential capacity than the
turbine that turns it. Staff believes it may be possible to move CT#2 near the current Power Plant,
construct a waste-to-energy boiler and steam generator as envisioned in Option 2A, and use the
exhaust gas heat from CT #2 to generate additional steam and produce more electricity. The
generator could also be turned using the existing combustion turbine, either independently or at
the same time as the waste-to-energy boiler is operating; and,
WHEREAS, more study is necessary to determine the technical and financial feasibility of
this potential project. Therefore, staff issued a Request for Proposals for a detailed evaluation to
be undertaken by an engineering firm. Five proposals were received. An evaluation team was
formed to review proposals and score on qualifications; price was not a factor in scoring the
proposals; and,
WHEREAS,after evaluating the proposals, staff determined that the proposal from Sargent
& Lundy, LLC, Chicago, IL, demonstrated the best project understanding and presented the best
qualified professionals for the project.
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Ames, Iowa,
that award of contract for evaluation of the feasibility of a Combustion Turbine#2 Heat Recovery
Steam Generator Concept to Sargent & Lundy, LLC, of Chicago, Illinois, in an amount not to
exceed $69,500, is hereby approved.
ADOPTED THIS 201h day of December, 2022.
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Renee hall, City Clerk John A. Haila, Mayor
Introduced by: Betcher
Seconded by: Corrieri
Voting aye: Beatty-Hansen, Betcher, Corrieri, Gartin, Junck, Rollins
Voting nay: None Absent: None
Resolution declared adopted and signed by the Mayor this 201h day of December, 2022.