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Emerging Technologies Table 8-1 Capital Cost Elements for Evaporative Condenser Equipment (for New 500-MWe Combined- Cycle Plants with 170-MWe Steam Cycle) Element Comment Cost Base unit—evaporative condenser Fabricated unit including tube bundles, headers, fans, sprays, mist eliminator, piping, and connections Consistently represents 2/3 (65– 70%) of the total installed cost; for full wet operation: ~$70/cell; for wet/dry operation: ~$85/cell Recirculating spray pumps Including drive motors Significant cost element: 4– 6% of total installed cost; lower end of range for wet/dry systems Concrete (plenum and basin) Including typical site preparation and installation Significant cost element: 14–16% (plenum = 5–6%; basin = 8–10%); high end of range for all-wet systems Steam duct Condensate collection and return Electricals and controls Walkways and ladders Steam ejector Installation Other elements - Water supply/intake structure - Water treatment/blowdown discharge - Site preparation/access provision - Painting, fire and lightning protection, acceptance testing - Delivery and unloading Includes support structure; varies with site layout Circulating water system (pumps, piping, valves, etc.) Wiring and hook-up; base price includes instrumentation — — Requires crane, anchoring to foundation, piping connections Typically minor; may be significant at specific sites Significant cost element: typically 7– 8% of total installed cost Typically 2–3% of total installed cost Typically 1–2% of total installed cost About 1.5% of total installed cost Minor; approximately $60k Typically 1.5–2% of total installed cost Not included in case study estimates or comparisons Auxiliary cooling Separate unit or additional cell on condenser Typically 5% additional heat load and ~5–6% additional cost; see Table 8-4 Location dependent; significant only if water source is far from site or at a much lower elevation Usually minor; may be significant if in zero-discharge region Highly site dependent; likely minor; not likely to be affected significantly by system choice Minor costs Entirely site and location dependent; typically minor 8-4PDF Image | Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs
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