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Nexant Parabolic Trough Solar Power Plant Systems Analysis 2005

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Nexant Parabolic Trough Solar Power Plant Systems Analysis 2005 ( nexant-parabolic-trough-solar-power-plant-systems-analysis-2 )

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1. Introduction Task 3 Multiple Plants at a Common Location Nine Solar Electric Generating Station (SEGS) parabolic trough solar power plants, ranging in capacity from 13.5 MWe to 89 MWe, are located in the southern California desert. Each of the plants is located adjacent to at least one other plant: SEGS I and II at Daggett; SEGS III through VII at Kramer Junction; and SEGS VIII and IX at Harper Lake. The plants are co-located to take advantage of common site permits, evaporation ponds, access to utility transmission lines, and sharing of the operation and maintenance staff. However, each of the projects was privately financed and constructed separately from the adjoining projects. In principle, additional benefits could have accrued if the individual plants were owned, financed, installed, and operated under one organization. An analysis was conducted to determine the economic benefits to locating multiple plants at a common site with a common owner. The potential economic advantages included the following: • Capturing the discounts available from the purchase of larger numbers of mirrors, heat collection elements, drives, structural steel elements, and sensors • Capturing the discounts available from the multiple purchase of the large Rankine cycle components, including the turbine-generator, condenser, steam generator, and main transformer • Using the final design engineering, the equipment specifications, and the procurement packages from the first plant on the subsequent plants • Reducing the permit schedule and expense by applying for, and submitting the environmental impact statement for, all of the plants with the first • Sharing the operation and maintenance staff and facilities • Securing a learning curve benefit on the construction labor schedule and hours by retaining one constructor for the series of plants • Reducing interest during construction expenses due to a reduction in the construction schedule • Simultaneously financing multiple plants to reduce the debt origination and lenders’ fees. Task 3 is the final task in an overall study, which includes the following tasks: 1) Preferred Plant Size and Capital Cost Estimate; 2) Dry Heat Rejection; and 3) Multiple Plants at a Common Location. The results from Task 1 are briefly discussed in Section 2 below. -1- Task 3 Multiple Plants at a Common Site

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