Design of Effective Heat Transfer Structures for Performance Maximization of a Closed Thermochemical Energy Storage Reactor Through Topology Optimization

Humbert, Gabriele; Sciacovelli, Adriano

doi:10.2139/ssrn.4446954

Cited by 1 publication

(3 citation statements)

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“…Regarding the kinetic equation for this type of reaction, some authors had demonstrated that the parameters in Eq. ( 5) could be taken as b = 1 and c = 0 for the dehydration [27][28][29][30].…”

Section: Mathematical Model Mathematical Modeling Involvesmentioning

confidence: 99%

“…Heating from the surroundings towards the center of the reactor, the result would be enhanced conductivity of heat and hence better thermal property for the systems. For example, in the previous works [27,[66][67][68][69][70][71][72][73][74], placing a heating source around the material under treatment facilitates the concentration of heat in its vicinity. Through the synergistic effect of the thermal conductivity of the reactor wall (titanium alloy) and the thermal conductivity of the storage material, significant enhancements in the thermal performance of the reactor can be achieved.…”

Section: Reaction Conversionmentioning

confidence: 99%

“…where ΔmH 2 O evap cond is determined by quantifying the water entering by condensation or leaving by evaporation when charging the system it is known as the amount of water absorbed or released during the reaction and mH 2 O stoichiometric is calculated through Eqs. (26) or (27) depending on the process and by using the mole conservation relation. The initial inlet mass during the charging process is given in Table 2.…”

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confidence: 99%

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Study of a Thermochemical Heat Storage Reactor Filled with Polyaluminum Sulfate for Low-Temperature Application

Gbenou,

Wang

2024

International Journal of Energy Research

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This paper investigates comprehensively the operational dynamics of a thermochemical heat storage (TCHS) reactor for low-temperature applications using polyaluminum sulfate and takes into consideration a developed simulation model with an experimentation validation. Significant concordances were found between the developed simulation model and the experimental results. Results reveal optimized conditions for the charging process using an electrical heater, with a heating temperature of 120°C at 10 K/min over 500 minutes. This achieves full material charging, with stabilized pressure drops at an equilibrium of 80 mbar, corresponding to a temperature of approximately 108°C, and yielding a thermal power of 950 W. An inlet vapor pressure of 18 mbar at 10°C for 5 hours is sufficient to completely discharge the bed, with pressure drops reaching around 30 mbar and a thermal power of 300 after reaction completion. Insights into conversion extents during both processes are provided, along with a remarkable thermal efficiency of 90% and a coefficient of performance (COP) of 97%, surpassing recommended theoretical values (50%). The study suggests further enhancing system performance through the design and implementation of a dedicated heat exchanger. The achievement of 75% of the targeted thermal power specification represents a significant milestone, offering valuable contributions towards the realization of sustainable technological advancements of both the reactor technology of TCHS and state-of-the-art thermal energy storage solutions. From the research, it is possible to infer further suggestions for enhancing this performance by designing and implementing a dedicated heat exchanger for both heat supply and retrieval mechanisms.

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Section: Mathematical Model Mathematical Modeling Involvesmentioning

confidence: 99%