Thermochemical energy storage by consecutive reactions for higher efficient concentrated solar power plants (CSP): Proof of concept

Cabeza, Luisa F.; Solé, Aran; Fontanet, Xavier; Barreneche, Camila; Jové, Aleix; Gallas, M. V.; Prieto, Cristina; Fernández, A. Inés

doi:10.1016/j.apenergy.2016.10.093

Cited by 46 publications

(19 citation statements)

References 62 publications

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“…Since then, much of the research on energy storage in CSP has focused on molten salt technology 32,54 and redox systems. 55,56 In recent years, because of its low-cost and high energy storage density (about 3.26 GJ/m 3 ), the carbonate decomposition system has rekindled people's research interest. Chacartegui et al 56 proposes a CaL-CSP integration system; the flow chart of which is shown in Figure 2.…”

Section: Carbonate Decomposition Systemmentioning

confidence: 99%

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Progress in thermochemical energy storage for concentrated solar power: A review

et al. 2018

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Summary Energy plays an important role in a fast‐paced modern society. With the depletion of fossil energy, effective utilization of solar energy is getting increasingly urgent. Thermal energy storage is an inevitable choice for effective utilization of renewable energy sources. As one of the most promising renewable energy sources, solar energy is inexhaustible. But it has some shortcomings such as instability and intermittency, affected by time, climate, and geographical location. Thermal energy storage technology, which can effectively reduce the cost of concentrated solar power generation, plays a crucial role in bridging the gap between energy supply and demand. In addition, thermal energy storage subsystem can improve performance and reliability of the whole energy system. According to different principles, thermal storage technology is generally classified as sensible heat storage, latent heat storage, and thermochemical energy storage. Most solar thermal power generation systems, currently demonstrated and operated in the world, adopt the method of sensible thermal energy storage. In contrast, thermochemical energy storage is a relatively new concept, which is still in the stage of basic test and verification. Thermochemical energy storage technology stores and releases energy through endothermic and exothermic reversible reactions. A closed system with separated reactants and products, in theory, can store energy indefinitely. The main thermochemical energy storage systems include redox system, metal hydride system, carbonate decomposition system, ammonia decomposition system, methane reforming system, and inorganic hydroxide system.

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Section: Carbonate Decomposition Systemmentioning

confidence: 99%

“…In the late 1970s, preliminary study of CaL process on solar TCES was carried out. Since then, much of the research on energy storage in CSP has focused on molten salt technology and redox systems …”

Section: Brief Introduction Of Tces Systemmentioning

confidence: 99%

Progress in thermochemical energy storage for concentrated solar power: A review

et al. 2018

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“…[3][4][5] Deployment of CHP systems is considered an appropriate method to enhance the utilization of surplus or waste heat from high-temperature industrial processes such as in the iron-making industry, concentrated solar power plants (CSPs), high-temperature gas cooled reactors, and so on. [6][7][8][9][10] The potential of the lithium orthosilicate/carbon dioxide (Li 4 SiO 4 /CO 2 ) reaction, as a working pair for high temperature ($650 C) CHP material was investigated and confirmed by author's group. 11 A Li 4 SiO 4 /CO 2 /zeolite CHP system was also proposed for practical application (Figure 1), and a zeolite packed bed reactor (ZPR) was introduced as a CO 2…”

Section: Introductionmentioning

confidence: 99%

“…Basically, a CHP utilizes the reversible chemical reaction and sorption to change the temperature level of thermal energy stored by chemical substances . Deployment of CHP systems is considered an appropriate method to enhance the utilization of surplus or waste heat from high‐temperature industrial processes such as in the iron‐making industry, concentrated solar power plants (CSPs), high‐temperature gas cooled reactors, and so on . The potential of the lithium orthosilicate/carbon dioxide (Li 4 SiO 4 /CO 2 ) reaction, as a working pair for high temperature (∼650°C) CHP material was investigated and confirmed by author's group .…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of lithium orthosilicate pellets for high‐temperature chemical heat pumps

et al. 2019

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Lithium orthosilicate/carbon dioxide/zeolite (Li4SiO4/CO2/zeolite) chemical heat pump (CHP) systems have been discussed for storage and transformation of surplus thermal energy (at ∼650°C) generated from renewable and nuclear energy systems. Tablet forms of Li4SiO4 (referred to as K‐tablets) have been developed with a new pelletizing method for practical application in packed bed CHP reactors. To understand the carbonation and decarbonation mechanisms of K‐tablets, a double‐shell model was suggested and used for explaining experimental results. Isothermal carbonation, decarbonation, and cyclic experiments were conducted under several reaction temperatures for characterization of the K‐tablet. The developed K‐tablet exhibited superior carbonation and decarbonation performance compared to pure Li4SiO4 powder at low temperatures, even when the powder was formed into a tablet shape. The K‐tablet also demonstrated enough durability and a stable reacted conversion value (Δx = 0.75) during cyclic experiments under all temperature. Higher kinetic performances of the K‐tablet than those of pure powder at 650°C and 600°C were also confirmed. The K‐tablet exhibited a high Woutput‐max of 9.82 kW/kg‐tablet at 650°C on the 10th cycle and that value was higher than that of the pure powder (3.25 kW/kg‐Li4SiO4) under the same reaction temperature. The developed K‐tablet has sufficient potential as a CHP material for heat transformation of thermal energy at 600°C to 650°C to >700°C.

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“…Electricity is then generated by an electric generator which is driven by a steam turbine with the efficiency limited by the Carnot cycle [1]. Considerable research efforts have been conducted to improve the efficiency of the CSP system and make the cost of electricity comparable to that of the conventional fossil-fuel power plant, e.g., thermal energy storage [2,3], thermophotovoltaic heat engine [4] and even the natural draft dry cooling towers (NDDCTs) [5]. The current study focuses on the performance improvement of NDDCTs which may offer the only effective alternative as most CSPs are located in arid or semi-arid areas.…”

Section: Introductionmentioning

confidence: 99%

Selection of wetted media for pre-cooling of air entering natural draft dry cooling towers

Zhang

et al. 2017

Applied Thermal Engineering

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HighlightsFour wetted media were comparatively studied for future pre-cooling design.Characteristics of wetted media suitable for pre-cooling were summarized.Media with middle efficiencies and pressure drops are superior for pre-cooling.Cellulose7060 is most promising for pre-cooling the 120m-high NDDCT. AbstractThe performance of natural draft dry cooling towers (NDDCTs) can be improved by wetted-medium evaporative pre-cooling. However, the pre-cooling benefit is season dependent and is significantly affected by wetted media. To further investigate the effect of wetted medium type on pre-cooling performance, the current study simulates a pre-cooled NDDCT using two typical types of wetted media, i.e., film (Cellulose7060 and PVC1200) and trickle (Trickle125 and Trickle100). A MATLAB program was developed and was validated against published data. The model was then used to carry out case study of a 120m-high NDDCT pre-cooled using the selected wetted media with fixed thickness of 300mm. Both the medium performance and pre-cooled NDDCT performance were compared to recommend the characteristics of wetted media promising for evaporative pre-cooling. Simulation finds that the media with high or low cooling efficiencies and pressure drops are not promising for the studied pre-cooling case while those media with middle cooling efficiencies and pressure drops intend to produce much performance enhancement and Cellulose7060 is a representative of such kind of medium. For the 120m-high NDDCT, the wetted-medium pre-cooling can raise the heat rejection rate of the tower without pre-cooling from 45MW to 92 MW, 76 MW, 68 MW and 65MW by Cellulose7060, PVC1200, Trickle125 and Trickle100, respectively at ambient temperature of 50℃ and humidity of 20%.

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Thermochemical energy storage by consecutive reactions for higher efficient concentrated solar power plants (CSP): Proof of concept

Cited by 46 publications

References 62 publications

Progress in thermochemical energy storage for concentrated solar power: A review

Progress in thermochemical energy storage for concentrated solar power: A review

Kinetic study of lithium orthosilicate pellets for high‐temperature chemical heat pumps

Selection of wetted media for pre-cooling of air entering natural draft dry cooling towers

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