Case studies of thermal energy storage (TES) systems: Evaluation and verification of system performance

Optimization of design and operation is presented for a solar energy receiver combined with a thermal energy storage. The concentrated solar power on-demand (CSPonD) concept, which can be described, in brief, as a volumetric solar energy receiver system combined with a modified raft thermocline concept, is considered. The CSPonD concept is assumed to be providing heat for a general cogeneration scheme where power production is the main product of the cogeneration. With a constant power production, a secondary process is assumed to consume the process heat from the CSPonD and power cycle. Models are developed for thermal analysis of the energy storage, taking into account hourly and seasonal variations in the solar energy as well as the heliostat field efficiency. Nonlinear programming (NLP) is used for optimization of the design and operation. The sequential method of optimization and a heuristic approach (parallel computing) are implemented using an equation-oriented modeling environment and gradient-based local solvers. A strategy is presented to design and operate the plant, considering the significant seasonal variations in the solar energy. Three case studies are presented. The first one optimizes the design based on a design day and a desired thermal duty. The other two address optimal yearly operation of the plant. The results of the optimization case studies show that (a) the CSPonD concept aids in handling variations (hourly, daily, and seasonal) in solar energy, (b) CSPonD is a promising concept for cogeneration, (c) the mass of salt required in the CSPonD concept is not significantly lower than the salt required in a single-tank thermal energy storage system.

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Materials Selection for Thermal Energy Storage Applications—Case Studies

Recent Advancements in Materials and Systems for Thermal Energy Storage - Green Energy and Technology ◽

10.1007/978-3-319-96640-3_5 ◽

2018 ◽

pp. 55-66

Author(s):

Mercè Segarra ◽

Camila Barreneche ◽

Alejandro Calderón ◽

Ana Inés Fernández

Keyword(s):

Energy Storage ◽

Case Studies ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Materials Selection ◽

Energy Storage Applications ◽

Selection For

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State of the art on high-temperature thermal energy storage for power generation. Part 2—Case studies

Renewable and Sustainable Energy Reviews ◽

10.1016/j.rser.2009.07.036 ◽

2010 ◽

Vol 14 (1) ◽

pp. 56-72 ◽

Cited By ~ 379

Author(s):

Marc Medrano ◽

Antoni Gil ◽

Ingrid Martorell ◽

Xavi Potau ◽

Luisa F. Cabeza

Keyword(s):

Power Generation ◽

High Temperature ◽

Energy Storage ◽

Case Studies ◽

Thermal Energy ◽

Thermal Energy Storage ◽

State Of The Art

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Energy and Exergy Analyses of a Solar-based Multi-generation Energy Plant Integrated with Heat Recovery System and Thermal Energy Storage

10.31224/osf.io/wgx28 ◽

2020 ◽

Author(s):

Shayan Sadeghi ◽

Samane Ghandehariun ◽

Behnaz Rezaie

Keyword(s):

Energy Storage ◽

Solar Energy ◽

Thermal Energy ◽

Thermal Energy Storage ◽

System Performance ◽

Heat Recovery ◽

Ternary Eutectic ◽

Energy System ◽

Design Parameters ◽

Energy And Exergy

An innovative multigeneration energy system driven by solar energy is proposed in this paper. The integrated model produces electricity, hydrogen, oxygen, and steam for heating purposes. The energy system comprises a pressurized cavity-based solar power tower, latent thermal energy storage (TES) unit, unfired gas turbine (GT) unit, regenerative steam Rankine cycle (SRC), copper-chlorine (Cu-Cl) thermochemical cycle, and heat recovery units. By utilization of a high-temperature ternary eutectic phase change material (PCM), a dynamic model is developed to deal with the intermittency of solar energy. Using energy and exergy approaches, the proposed system is investigated to assess exergy destruction rates and the overall system performance. A parametric study is performed to investigate the influence of design parameters such as the number of heliostats, the pressure ratio of GT, and temperatures of reactions on the system performance. The results showed that the energy system produces electricity, steam, hydrogen, and oxygen at a rate of 41.9 MW, 12.6 kg/s, 0.19 kg/s, and 0.76 kg/s, respectively. Energy and exergy efficiencies of the integrated system are found to be 49.9%, and 44.9%, respectively.

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