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Economic impact of latent heat thermal energy storage systems within direct steam generating solar thermal power plants with parabolic troughs

Seitz, Markus and Johnson, Maike and Hübner, Stefan (2017) Economic impact of latent heat thermal energy storage systems within direct steam generating solar thermal power plants with parabolic troughs. Energy Conversion and Management, 143, pp. 268-294. Elsevier. DOI: 10.1016/j.enconman.2017.03.084 ISSN 0196-8904

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Official URL: http://www.sciencedirect.com/science/article/pii/S0196890417303011


One possible way to further reduce levelized costs of electricity of concentrated solar thermal energy is to directly use water/steam as the primary heat transfer fluid within a concentrated collector field. This socalled direct steam generation offers the opportunity of higher operating temperatures and better exergy efficiency. A technical challenge of the direct steam generation technology compared to oil-driven power cycles is a competitive storage technology for heat transfer fluids with a phase change. Latent heat thermal energy storages are suitable for storing heat at a constant temperature and can be used for direct steam generation power plants. The calculation of the economic impact of an economically optimized thermal energy storage system, based on a latent heat thermal energy storage system with phase change material, is the main focus of the presented work. To reach that goal, a thermal energy storage system for a direct steam generation power plant with parabolic troughs in the solar field was thermally designed to determine the boundary conditions. This paper discusses the economic impact of the designed thermal energy storage system based on the levelized costs of electricity results, provided via a wide parametric study. A state-of-the-art power cycle with a primary and a secondary heat transfer fluid and a two-tank thermal energy storage is used as a benchmark technology for electricity generation with solar thermal energy. The benchmark and direct steam generation systems are compared to each other, based respectively on their annual electricity yields and their levelized costs of electricity at two different sites. A brief comparison of a passive and an active latent heat storage system is included. Finally, specific target costs for the new direct steam generation thermal energy storage system are determined based on the results of the parametric study.

Item URL in elib:https://elib.dlr.de/111930/
Document Type:Article
Title:Economic impact of latent heat thermal energy storage systems within direct steam generating solar thermal power plants with parabolic troughs
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Seitz, Markusmarkus.seitz (at) dlr.deUNSPECIFIED
Johnson, Maikemaike.johnson (at) dlr.deUNSPECIFIED
Hübner, StefanLinde AGUNSPECIFIED
Date:1 July 2017
Journal or Publication Title:Energy Conversion and Management
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.enconman.2017.03.084
Page Range:pp. 268-294
Keywords:CAPEX, capital expenditures; CSP, concentrating solar power; DNI, direct normal irradiance; DSG, direct steam generation; EPC, engineering-procurement-construction; HTF, heat transfer fluid; HTX, heat exchanger; IAM, incidence angle modifier; LCOE, levelized costs of electricity; LHTES, latent heat thermal energy storage; OPEX, operational expenditures; PB, power block; PCM, phase change material; PTC, parabolic trough collector; PV, photovoltaic; SF, solar field; SHTES, sensible heat thermal energy storage; SOC, state-of-charge; TES, thermal energy storage; TMY, typical meteorological year.
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Johnson, Maike
Deposited On:12 Jul 2017 09:09
Last Modified:06 Sep 2019 15:20

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