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Table 5-4 Capital Cost Elements for Wet Cooling System Equipment for New Plants Element Installation/erection Surface steam condenser Electricals and controls Comment Included in bases price Major cost element (see previous subsection) Fan/pump motor wiring and controls, etc. Cost Comparative Cost Analyses Wet cooling tower Erected tower including structure, fans, circulating pumps, fill, drift eliminators, etc. Strongly dependent on materials, assumed Douglas Fir; typically 35 to 45% of system cost -- Typical range of $5 to $12/kWe; approx. 35 to 45% of system cost Important cost item; estimated at $25,000 per cell Tower basin Including typical site preparation Significant cost item; function of tower size; estimated at $25/ft of basin perimeter plus $10/sq ft of basin area; typically 3 to 6% of system cost Circulating water system Pumps, piping, valves, etc. Can be significant cost item; dependent on site layout; assumed at 5% of total installed cost Water supply/intake structure Highly site dependent; minor if source is nearby; major, if water supply is far from site or at much lower elevation Estimated at 1 to 2% total installed cost Water treatment/blowdown discharge Usually minor; may be significant if in zero- discharge region where evaporation ponds or brine concentrators may be required Estimated at 1% total installed cost Auxiliary cooling Additional elements − Site preparation/ access provision − Winter operation; freeze protection − Low-noise fans − Painting − Fire and lightning protection − Acceptance testing Typically 5% additional heat load Typically minor and site dependent Estimated at 5% additional cost Not included in case study estimates of comparisons − Highly site dependent; likely minor; not likely to be affected significantly by system choice − Location dependent − Significant cost if required; more important for dry systems than for wet − Typically minor costs − Typically minor costs − Typically minor costs 5-15PDF Image | Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs
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