Thermodynamic analysis of compressor operated resorption thermochemical energy storage system for heat storage, combined cooling and heat upgradation

Babu, K. Sarath; Kumar, E. Anil

doi:10.1016/j.est.2022.104659

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…These new hybrid systems allow, for example, to produce heat at 150°C from a heat source available only at 90°C [2], to perform an inter-seasonal storage allowing to heat a house in a cold climate with outside temperature ranging from -5°C to -30°C) [3], to produce heat and cold simultaneously [4], [5], to use and valorize the heat of exhaust gases of a refrigerated truck in order to help maintain the temperature of its cold chamber [6], [7] or to make possible a cold production by recovering the heat generated by a fuel cell or/and an electrolyzer allowing to obtain increase the overall efficiency of the electricity storage/discharge in the form of hydrogen [8].…”

Section: Introduction 1study Frameworkmentioning

confidence: 99%

Energetic macroscopic representation of a mechanical compression-assisted hybrid thermochemical cycle exploiting low grade heat for cold applications

Perrigot,

Perier-Muzet,

Ortega

et al. 2023

Energy Conversion and Management

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Section: Introduction 1study Frameworkmentioning

confidence: 99%

Energetic macroscopic representation of a mechanical compression-assisted hybrid thermochemical cycle exploiting low grade heat for cold applications

Perrigot,

Perier-Muzet,

Ortega

et al. 2023

Energy Conversion and Management

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“…In comparison to STHT, RTHT is frequently characterized by an extended cycle period due to the relatively low chemical reaction rate resulting from the low driving pressure drop. In addition, the releasing temperature may become unstable due to the discrepancy between the chemical reaction rate of the two reactive salts (Babu and Kumar, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Results indicated that the proposed system exhibits potential advantages in energy efficiency and system compactness. To obtain stable heat output temperature and satisfy the user demand in various utilizations, Babu and Kumar (2022) erected a compressor driven NH 3 -based RTHT in which the compressor was installed between the two reactors to compress the desorbed NH 3 vapor from the HTS reactor to the LTS reactor during the discharging process. The system performances were theoretically evaluated and contrasted by employing different combinations of halide salts under different cooling temperatures and compression ratios for heat storage, combined cooling, and heat upgradation.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of mechanical booster pump-assisted sorption thermochemical heat transformer driven by low-grade heat for building applications

Zeng,

Kobayashi,

et al. 2023

Front. Energy Res.

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Thermochemical heat transformers (THT) can offer the potential for efficient energy storage and upgrade based on a reversible solid-gas reaction. A mechanical booster pump (MBP)-assisted water-based sorption thermochemical heat transformer driven by low-grade solar thermal energy is proposed to handle variations in the heat demand of buildings. The MBP operates during the discharging process to adjust the magnitudes of temperature lift by compression ratio depending on the user’s demands. The performances of the proposed cycle employing three different reactive salts are investigated and compared with the conventional THT cycle under various operating conditions. Results indicate that compared to the conventional THT cycle, the proposed cycle achieves a maximum temperature lift of 15–17°C, 17–19°C, and 23–26°C for SrBr2, LiOH, and CaCl2 in the evaporating temperature range of 20–40°C, respectively. In the same operating conditions, SrBr2 demonstrates the highest energy and exergy efficiencies, while CaCl2 is inferior to the others due to its greater sensible heat consumption and lower reaction heat under the studied conditions. A suggestion is put forth for enhancing the temperature lift by employing a two-stage MBP-assisted cycle that utilizes the reactive salt SrBr2. Compared to the single-stage MBP-assisted cycle, the heat output temperature can be further increased by up to 3–16°C at the expense of a maximum decrease of 6.6%, 84.4%, and 9.0% in coefficient of performance (COP) based on total energy input, COP based on electricity input, and exergy efficiency, respectively, at 30°C evaporating temperature. The economic and environmental analysis indicates that the proposed system is economically and environmentally feasible and could be a promising alternative to residential water heaters.

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“…20 Maan Al-Zareer et al 22 performed a thermodynamic analysis of the strontium chloride-ammonia thermal energy storage system, revealing that it achieves a maximum energy efficiency of 65.4% and a maximum exergy efficiency of 50.8%. K Sarath Babu et al 23 performed an analysis of the thermodynamics of a compressor-operated resorption thermochemical energy storage system for both heating and cooling applications and determined that the system achieves a maximum coefficient of performance (COP) of 4.1 when using NaBr and 4.8 when using KI as the working substances. S. Z. Xu 24 studied a single-stage and multistage adsorption cooling system with activated carbon and ammonia thermodynamically and reported that both COP and second law efficiencies are highly dependent on the choice of the cycle.…”

mentioning

confidence: 99%

Thermodynamic analysis of adsorption cooling system using composite halide salts

Anilkumar,

Sharma,

Kumar

2024

Energy Storage

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In the development of an adsorption cooling system, it has been observed that halide composites exhibit less hysteresis than pure halide salts. Therefore, it is important to thermodynamically analyze the composite salt‐based adsorption cooling system (ACS) to understand its performance. In this study, we conduct a thermodynamic first‐law and second‐law analysis of ACS using reactive salts such as BaCl2, BaCl2‐ENG, CaCl2‐ENG, SrCl2‐ENG, and MnCl2‐ENG, with ammonia as the refrigerant. We compared the coefficient of performance (COP) with that of a pure halide salt‐based ACS. The theoretical COP of the ACS at a mass ratio of 4 is estimated as 0.45, 0.4, 0.27, 0.37, and 0.22, and the second‐law efficiency is estimated as 44.28%, 38.76%, 20.71%, 16.26%, and 6.92% for BaCl2, BaCl2‐ENG, CaCl2‐ENG, SrCl2‐ENG, and MnCl2‐ENG reactive salts, respectively. Among the different salts, BaCl2 shows the highest COP. However, the COP values are lower than the maximum theoretical coefficient of performance (COPmax) due to the sensible mass of the reactor, and COP values decrease with an increase in the mass ratio due to an increase in sensible mass. It is noteworthy that the COP of the pure salt‐based ACS is higher than that of the composite salt‐based ACS because the ammonia uptake of pure salt is greater than that of the composite salt.

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Thermodynamic analysis of compressor operated resorption thermochemical energy storage system for heat storage, combined cooling and heat upgradation

Cited by 11 publications

References 31 publications

Energetic macroscopic representation of a mechanical compression-assisted hybrid thermochemical cycle exploiting low grade heat for cold applications

Energetic macroscopic representation of a mechanical compression-assisted hybrid thermochemical cycle exploiting low grade heat for cold applications

Thermodynamic analysis of mechanical booster pump-assisted sorption thermochemical heat transformer driven by low-grade heat for building applications

Thermodynamic analysis of adsorption cooling system using composite halide salts

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