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Table 5-8 Capital Cost Elements for Dry Cooling System Equipment for New Facilities Comparative Cost Analyses Element Comment Cost Air-cooled condenser See discussion in text Strongly dependent on choice of design point expressed as ITD (Tcond-Tamb); ranges from $100 to $250/kWe Installation/erection Significant cost item; quoted in different ways; see discussion in text Ranged from $175,000 to $225,000 per cell; $200,000 used in comparisons Steam duct support; column foundations Installation dependent Estimated for 106 lb/hr unit at $120,000 to $160,000; $150,000 used for costs and comparisons Electricals and controls Fan/pump motor wiring and controls, etc.; see discussion in text Important cost item; estimates ranged from at $20,000 to $35,000 per cell; used 5.5% of installed base cost Auxiliary cooling Typically 5% additional heat load; typically handled with separate unit (usually wet) but occasionally as extra cells on ACC; see discussion in text Estimated at 7.5% additional cost without specifying choice of auxiliary unit Cleaning system for finned tube surfaces Additional elements - Water supply/intake structure - Water treatment/blowdown discharge - Site preparation/access provision - Finish paint; fire/lightning protection - Winter operation; freeze protection Minor but required in most locations Typically minor and site dependent Estimated at $150,000 Not included in case study estimates of comparisons Low-noise fans Included in base costs (far- field sound pressure levels of ~65dBa at 400 feet) --- Minor (but not zero) for dry systems Minor (but not zero) for dry systems Highly site dependent and likely minor; not affected significantly by system choice Typically minor costs Location dependent and relevant to both wet and dry systems; typically 2 to 4% of total installed cost; not included for California estimates 5-25PDF Image | Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs
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