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Economic Impacts of NREL CA Solar Benefits CSP in California The expenditures in southern California were then multiplied by the final demand multipliers for the respective industries for each major capital and labor expense. This impact estimate was then added to the initial change due to the investment. Gross State Output, earnings and output estimates were then deflated to 1997, the basis for the I-O tables in the RIMS II model. Final results were then escalated to 2005 dollars. All estimates during construction were performed on a per MW basis. A similar process was followed for the operation period, based on the annual expenditures made per CSP plant per year. This estimate included expenditures for plant staff, consumables and supplies, land rent, and other cost items. Economic impact estimates for the operation period are provided on per MW and per MWh basis. The economic impacts of CSP deployment were then compared with the economic activity generated by 500 MW combined cycle and 85 MW simple cycle combustion turbine plants. These plants provide similar electric services to what a CSP plant provides and offer a basis for estimating the relative impacts of this renewable technology. Sizing of the combined cycle and simple cycle plants are typical sizes for plants built for intermediate and peaking service. 5.2 Input Data for the Model An important element of the economic impact analysis is the estimation of capital and annual operations and maintenance (O&M) costs. The magnitude of the capital and annual expenditures directly impacts the magnitude of the direct and indirect economic impacts. Black & Veatch used data from the Excelergy Model, developed and maintained by NREL.9 Capital and O&M costs were generated for parabolic trough systems with six hours of storage for a 100 MW plant built in 2007, a 100 MW plant built in 2009, a 150 MW plant built in 2011, and a 200 MW plant built in 2015. There are indications that recently bid trough plants may have somewhat lower capital costs than those generated by Excelergy; howerver, these data are not publicly available. Overall, while lower capital costs can somewhat lower the economic impact in California, the decrease is not expected to significantly change the conclusions of this report. 9 Excelergy is an Excel spreadsheet-based model for solar parabolic trough systems. Developed by NREL, it models annual plant performance and estimates capital and O&M costs. It uses a time step approach with hourly or finer time increment solar and weather data. Excelergy has been benchmarked against the SEGS plants. April 21, 2006 5-3PDF Image | Economic, Energy, and Environmental Benefits of Concentrating Solar Power in California
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