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U.S. Department of Energy
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Feasibility of cogeneration retrofit for Illinois Center

Technical Report ·
OSTI ID:6465826
A thermal-economic analysis was performed for retrofitting cogeneration into an existing portion of Illinois Center, a commercial-residential building development near downtown Chicago. Several retrofit cogeneration options were analyzed including direct use of gas-turbine exhaust as preheated combustion air. However, this was ruled out due to the limited amount of such heat that could be used in any single building relative to the amount produced by even the smallest turbine available for the purpose, and due to the difficulty of ducting hot gas to multiple buildings as compared with conventional methods employing steam or hot water. Considered further were three cogeneration alternatives using exhaust waste heat recovery equipment and using these conventional media. The alternatives included 1 0.762-MW(e) gas turbine, 1 5.01-MW(e) diesel, and 8 0.565-MW(e) diesels totaling 4.52 MW(e) of generating capacity. None of the options were found to be economically attractive. The failure to achieve economic return on investment is attributed to (1) the relatively small size of the equipment and the lack of economy of scale thereof, (2) the lack of a credit for savings of conventional equipment cost in the present retrofit situation, and (3) the relatively low value of electrical energy in the buildings considered due to their high usage patterns.
Research Organization:
Illinois Inst. of Tech., Chicago (USA). Dept. of Mechanical Engineering
DOE Contract Number:
FG02-80CS40337
OSTI ID:
6465826
Report Number(s):
DOE/CS/40337-4; ON: DE83005952
Country of Publication:
United States
Language:
English

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