Relying on a general equilibrium model of Argentina's economy calibrated for 1993 and internalizing all productivity and scale gains achieved up to 1999, this paper isolates the distributional effects of utilities reform from the impact of other reforms taking place in the country during the 1990s. The analysis shows that both private and public agents gain from the increases in productivity and in service access made possible by the utilities reform. In the short term, the public sector benefits from the proceeds of the sale of firms and the associated debt reduction, but greater advantages in the long term accumulate from the expanded taxbase and from the reduction in expenditure flows. Private agents gain from lower costs, lower average tariffs, and improvements in service quality as well as greater employment opportunities resulting from lower production costs. These welfare gains, however, are substantially offset by the 'tequila' and 'vodka' …/…
The direct steam generation (DSG) in parabolic trough collectors is a promising option to improve the mature parabolic trough solar thermal power plant technology of the Solar Energy Generating Systems (SEGS) in California. According to previous studies [1–3], the cost reduction of the DSG process compared to the SEGS technology is expected to be 8 to 25%. All these studies were more or less preliminary since they lacked detailed information on the design of collector fields, absorber tubes required for steam temperatures higher than 400°C and power blocks adapted to the specific needs of the direct steam generation. To bridge this gap, a detailed system analysis was performed within the German R&D project DIVA. Power blocks and collector fields were designed for four different capacities (5, 10, 50 and 100 MWel) and different live steam parameters. The live steam temperature was varied between saturation temperature and 500°C, and live steam pressures of 40, 64 and 100 bar were investigated. To assess the different cases, detailed yield analyses of the overall system were performed using hourly data for the direct normal irradiation and the ambient temperature for typical years. Based on these results the levelized costs of electricity were determined for all cases and compared to a reference system using synthetic oil as heat transfer fluid (HTF). This paper focuses on two main project findings. First, the 50 MWel DSG system parameter comparisons are presented. Second, the detailed comparison between a DSG and a SEGS-like 100 MWel system is given. The main result of the investigation is that the benefit of the DSG process depends on the project site and can reach an 11% reduction of the levelized electricity cost (LEC).
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