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Parabolic-Trough Technology Roadmap January 1999 Assuming a 50-MW SEGS project were built today, significant reductions in cost could be expected. The KJC Operating Company O&M Cost Reduction Program has demonstrated a number of improvements, including (1) the replacement of flex hoses with ball joint assemblies, which significantly reduces pumping parasitic electric consumption; and (2) an improved receiver tube, which significantly reduces solar field heat losses. Additional expected cost reductions are based on other O&M gains that cannot be fully demonstrated at an existing plant, on economies of scale resulting from increased plant size, and on the general cost reduction trend over the last 10 years for large power plant equipment. The second bar in Figure 6 represents the LEC for a 50-MW SEGS plant built today. The third bar in Figure 6 represents the cost of solar power from a 50-MW solar increment ISCCS plant. The ISCCS bar represents the incremental cost for solar electricity only. The fossil electricity cost would be substantially lower. The cost for the SEGS plants is a blended cost of 75% solar and 25% fossil, so the reduction in the cost of solar electricity is even larger than what is shown in the figure. The final bar reflects the cost of solar power from a 50-MW increment ISCCS plan built in a developing country that would have access to a GEF grant and special low- cost financing. Given these assumptions, solar power is close to the competitive range for power in many regions. 20 18 16 14 12 10 8 6 4 2 0 18.3 ¢/kWh Actual Perf. Demonstrated Improvements Tax Code Changes 11.5¢/kWh LUZ Price 30 MW SEGS 1988 dollars Expected Improvements Converting to 1998 dollars 13.5¢/kWh 50 MW SEGS based on Pilkington Solar International cost estimates 10.5¢/kWh Conversion to ISCCS 2% Debt $45M GEF 5.5¢/kWh 1988 SEGS 1998 SEGS Domestic 1998 ISCCS Domestic 1998 ISCCS International Figure 6. Cost of trough technology today Page 13PDF Image | A Pathway for Sustained Commercial Development and Deployment of Parabolic Trough Technology
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