Thermodynamic analyses on hybrid sorption cycles for low-grade heat storage and cogeneration of power and refrigeration

Godefroy, Alexis; Périer-Muzet, Maxime; Mazet, Nathalie

doi:10.1016/j.apenergy.2019.113751

Cited by 27 publications

(9 citation statements)

References 23 publications

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“…Focusing on prevailing cold production modes, a previous work provides further details about these calculations, especially energy balance equations [22]. Regarding prevailing power generation modes, a similar set of equations has been solved.…”

Section: Relevant Performance Criteriamentioning

confidence: 99%

Hybrid thermochemical cycles for low-grade heat storage and conversion into cold and/or power

Godefroy

Périer-Muzet

Neveu

et al. 2020

Energy Conversion and Management

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This paper investigates several new hybrid cycles combining a solid/gas sorption refrigeration cycle with a Rankine cycle, and targeting three key functions: they are able to recover low-grade heat (for instance industrial waste heat), to store this energy, and to convert it into cold and/or power. Five operating modes have been designed, for either prevailing cold production or power generation. A thermodynamic analysis was performed to evaluate their energy and exergy performances, for a wide variety of reactive salts in the thermochemical system. Depending on the different modes and reactants, these hybrid thermochemical cycles can operate at temperatures as low as 87 °C. The share of power in total energy production lies between 0 and 30% for prevailing cold production modes, and between 50 and 100% for prevailing power generation modes. The energy and exergy efficiency reach 0.61 and 0.41, respectively. The energy storage density reaches about 170 kWh per m 3 of storage system. In some cases, additional power generation occurs during the charging step. Alternative systems performing the same functions and based on commercial systems have been designed and compared with hybrid thermochemical cycles. This comparison highlights that the energy storage density is lower for hybrid cycles. However, the global energy efficiency can be higher for hybrids, especially for prevailing cold production modes where it can be 34 % higher than for the alternative commercial system.

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Section: Relevant Performance Criteriamentioning

confidence: 99%

Hybrid thermochemical cycles for low-grade heat storage and conversion into cold and/or power

Godefroy

Périer-Muzet

Neveu

et al. 2020

Energy Conversion and Management

Self Cite

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“…In the current context of climate change and global warming, many new thermodynamic cycles have been developed and studied for the exploitation of low-grade heat sources (such as industrial waste heat or solar heat) to meet the growing need for refrigeration. Among the most studied low-grade heat-driven refrigeration cycles, i.e., absorption cycles [1], adsorption cycles [2], and ejector cycles [3], are gaining increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Supersonic Flows inside a Steam Ejector with Liquid–Vapor Phase Change Using CFD Simulations

Charton,

Perret,

Phan

2024

Thermo

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In this work, different CFD models to compute flows inside a steam ejector were investigated. The results were compared to the analytical models as well as the experimental results from the literature. All the simulations gave realistic results from the hydrodynamic perspective with a relative error of the entrainment ratio between 25% and 40% compared to reference experimental data. However, an analysis of the temperature profiles showed that only realistic results from the thermodynamic perspective were given by multiphase calculations. The first multiphase model tested was the so-called Wet-Steam model from ANSYS Fluent. This model gave inconsistent results for the steam ejector CFD simulation due to the physical boundaries of this model. The second model tested was the Eulerian mixture model, which gave the most realistic results in terms of the physical conditions of the liquid and vapor phases inside the ejector. It also showed that the phase change could have a significant impact on the value of the critical output pressure as a way to improve the performance of the ejector.

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“…Researchers have proposed various thermodynamic systems to improve the efficiency of WHR technology, including the Rankine cycle [7,9], Kalina cycle [10], Brayton cycle [11], and combined heat and power systems [12,13]. Among these cycles, the Rankine cycle stands out in the field of waste heat recovery due to its advantages of high efficiency, simplicity, and cost-effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Green and Efficient Recovery and Optimization of Waste Heat and LNG Cold Energy in LNG-Powered Ship Engines

Yang,

Lei,

Zou

et al. 2023

Energies

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This study focuses on the Wartsila 9L34DF engine and proposes an integrated system for low-temperature carbon capture using the coupling of cold and hot energy recovery with membrane separation in LNG-powered ships. By utilizing a series dual-pressure organic Rankine cycle (SDPORC) system to recover waste heat from the engine exhaust gases and generate electricity, the system provides power support for the low-temperature carbon capture compression process without consuming additional ship power. To validate the accuracy and reliability of the mathematical model, the simulation results are compared with the literature’s data. Once the model’s accuracy is ensured, the operational parameters of the integrated system are analyzed. Subsequently, working fluid optimization and genetic algorithm sensitive parameter optimization are conducted. Finally, under the optimal operating conditions, the thermodynamic performance and economic evaluation of the integrated system are assessed. The results demonstrate that the net power output of the integrated system is 100.95 kW, with an exergy efficiency of 45.19%. The unit carbon capture cost (UCC) is 14.24 $/ton, and for each unit of consumed LNG, 1.97 kg of liquid CO2 with a concentration of 99.5% can be captured. This integrated system significantly improves the energy utilization efficiency of ships and reduces CO2 emissions.

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Thermodynamic analyses on hybrid sorption cycles for low-grade heat storage and cogeneration of power and refrigeration

Cited by 27 publications

References 23 publications

Hybrid thermochemical cycles for low-grade heat storage and conversion into cold and/or power

Hybrid thermochemical cycles for low-grade heat storage and conversion into cold and/or power

Analysis of Supersonic Flows inside a Steam Ejector with Liquid–Vapor Phase Change Using CFD Simulations

Green and Efficient Recovery and Optimization of Waste Heat and LNG Cold Energy in LNG-Powered Ship Engines

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