Modular Trough Power Plant Cycle and Systems Analysis

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Modular Trough Power Plant Cycle and Systems Analysis ( modular-trough-power-plant-cycle-and-systems-analysis )

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Incentive Table 20. Effect of Financial Incentives First-Year Benefit Energy Price ¢/kWh Baseline IPP financing in California 20.1 1.5 ¢/kWh PTC in place of 10% ITC 1.5 ¢/kWh PTC and 10% ITC ITC increased from 10% to 50% California buy-down $3,500/kWe Low-interest financing (5% Interest) 20.2 -0.5% 18.3 9.0% 12.7 37% 11.7 42% 16.0 20% Based on these results, it is clear that a combination of technology enhancements, technology cost reductions, and increased financial incentives are likely to be necessary to achieve sustained markets for this technology. However, sufficient niche market opportunities may exist to make this technology attractive to one or more power industry developers. This type of system is likely to provide the lowest cost solar power option in the 100-kWe to 10-MWe system size range. 7. Discussion and Conclusions Industries involved with the organic Ranking cycle and solar power have increasing interest in modular trough power plants. Although trough-ORC integration has been tested before, advances in parabolic trough and organic Rankine cycle technology make this integration worth reconsidering. Based on growing interest, this study was conducted by NREL for an independent assessment of the MTPP concept to gain a better understanding of its potential. Where appropriate, NREL uses technical support from other power industry players to help validate the analysis and results of the evaluation. The study included the following key elements: • Identification of key assumptions to be used for the study • Development of detailed organic Rankine power cycle models to evaluate various design options. This work included contracts with the ORC-power industry for validation of NREL’s power cycle model, assumptions, and support for optimization of power cycle components. The models were also used to characterize power-cycle off-design performance characteristics • Development of an hourly simulation model to integrate the solar and power cycle performance and to allow determination of annual system performance • Assessment of MTPP economics, including: assessment of potential market opportunities, development of detailed capital and O&M cost models for both the power cycle and solar equipment, and financial cash flow analysis of systems. The overall goal of the study was to assess the technical and economic merits of the MTPP concept. The type of MTPP system designed would depend primarily on the specific power requirements of the intended application. There is no single solution that is likely to be the best 46

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