4.5 Article

Cost-Benefit Analysis of Solar Thermal Plants with Storage in a Hydrothermal System

期刊

ENERGIES
卷 14, 期 18, 页码 -

出版社

MDPI
DOI: 10.3390/en14185662

关键词

concentrated solar power; thermal energy storage; levelized cost of electricity; energy value; net cost of electricity; hydrothermal system

资金

  1. National Council for Scientific and Technological Development (CNPq) [140432/2017-5]
  2. CEPEL

向作者/读者索取更多资源

This study aimed to investigate the economic benefits of CSP plants with TES systems in a hydrothermal system, showing that their costs can be reduced by at least 37% by considering their benefits to the system. The use of net cost is proposed for appropriate comparison among energy sources.
Economic feasibility studies of concentrated solar power (CSP) plants with thermal energy storage (TES) systems have been mainly based on the levelized cost of electricity (LCOE), disregarding the economic benefits to the electricity system resulting from the dispatchability of the CSP plants. The analysis of these benefits is essential since the existence of storage can provide greater operating flexibility to the system. Although there are few studies on the benefits of CSP plants in thermoelectric systems, this analysis has not yet been done in a predominantly hydroelectric system. In this paper, CSP plants with TES systems were inserted in a hydrothermal system in order to estimate the economic benefits and the net cost of electricity generated by those plants. The System Advisor Model (SAM) and the hydrothermal scheduling model DESSEM were used in a real case study of inclusion of CSP plants in the Brazilian system. The results indicate that the cost of a CSP plant, previously estimated by the LCOE, can be reduced by at least 37% when considering its benefits to a hydrothermal system, increasing its competitiveness with other technologies. Therefore, we propose the use of the net cost for an appropriate comparison among energy sources.

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