Crystallization-free and low-cost deep eutectic solvents for absorption thermal battery utilizing ultra-low-grade energy

Sui, Yunren; Ding, Zhixiong; Zhai, Chong; Lin, Haosheng; Wu, Wei

doi:10.1016/j.enconman.2023.116984

Cited by 16 publications

(2 citation statements)

References 65 publications

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“…Renon et al used the concept of a local component to derive the nonrandom twoliquid equation, which is applicable to both partially miscible and completely miscible mixtures [25,45]:…”

Section: Nonrandom Two-liquid (Nrtl) Modelmentioning

confidence: 99%

Estimation of Component Activities and Molar Excess Gibbs Energy of 19 Binary Liquid Alloys from Partial Pair Distribution Functions in Literature

Wang

Chen

Tao

2023

Metals

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This work proposes a new method for estimating the molar excess Gibbs energy and activity of liquid alloy based on recent research. The local composition theory provides a connection between the structures of liquid alloys and the thermodynamic models. The partial pair distribution function (PPDF) was utilized to calculate the parameters of the MIVM, RSM, Wilson, and NRTL. The statistics of the number of molecular pairs of MIVM and RSM were rewritten, which resulted in new forms of the two models. To enhance the NRTL’s estimation performance, the coordination number was incorporated into it (M-NRTL). The aforementioned model and Quasi-chemical model (QCM) were utilized to estimate the excess Gibbs energy and activity of 19 alloys. The alloys contained multiple sets of PPDFs, which enabled the calculation of multiple sets of model parameters. The work examined the impact of expressing the model parameters as first-order linear functions of the components or as constants on the accuracy of the estimation. The parameters were treated as constants. MIVM, RSM, and M-NRTL provided an average relative deviation (ARD) of activity of less than ±20% for 15, 10, and 9 alloys by estimation. When model parameters were expressed as a function of components, QCM showed the best estimation performance, having nine alloys with an ARD of less than ±20%. The number of alloys with an ARD of less than ±20% corresponding to MIVM, RSM, Wilson, NRTL, and M-NRTL was six, five, three, five, and two, respectively. This new method offers simplicity, numerical calculation stability, and excellent reproducibility.

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“…Renon et al used the concept of a local component to derive the nonrandom twoliquid equation, which is applicable to both partially miscible and completely miscible mixtures [25,45]:…”

Section: Nonrandom Two-liquid (Nrtl) Modelmentioning

confidence: 99%

Estimation of Component Activities and Molar Excess Gibbs Energy of 19 Binary Liquid Alloys from Partial Pair Distribution Functions in Literature

Wang

Chen

Tao

2023

Metals

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“…where m r is the mass flow rate of the refrigerant; η vol is the volumetric efficiency of the compressor; v r refers to the specific volume of the refrigerant; V comp and n denote the theoretical displacement and frequency of the compressor. The power consumed by the compressor is defined by [36,37]:…”

Section: Heat Pump Cycle Modelmentioning

confidence: 99%

Superhydrophobic Microchannel Heat Exchanger for Electric Vehicle Heat Pump Performance Enhancement

Sui,

Liang

et al. 2023

Sustainability

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Battery-powered electric vehicles (EVs) have emerged as an environmentally friendly and efficient alternative to traditional internal combustion engine vehicles, while their single-charge driving distances under cold conditions are significantly limited due to the high energy consumption of their heating systems. Heat pumps can provide an effective heating solution for EVs, but their coefficient of performance (COP) is hampered by heat transfer deterioration due to frost accumulation. This study proposes a solution to this issue by introducing a microchannel heat exchanger (MHE) with superhydrophobic surface treatment (SHST) as a heat pump evaporator. A computational fluid dynamics MHE model and a dynamic heat pump model are developed and rigorously validated to examine the detrimental impact of frost accumulation on heat transfer, airflow resistance, and heat pump performance. When the frost layer thickness is 0.8 mm at a given air-side velocity of 1.0 m/s, the air-side heat transfer coefficient can be reduced by about 75%, and the air-side pressure drop sharply increases by 28.4 times. As frost thickness increases from 0 to 0.8 mm, the heating capacity drops from 3.97 to 1.82 kW, and the system COP declines from 3.17 to 2.30. Experimental results show that the frost thickness of the MHE with SHST reaches approximately 0.4 mm after 30 min, compared to that of 0.8 mm of the MHE without SHST, illustrating the defrosting capability of the superhydrophobic coating. The study concludes by comparing the performance of various heating methods in EVs to highlight the advantages of SHST technology. As compared to traditional heat pumps, the heating power consumption of the proposed system is reduced by 48.7% due to the defrosting effect of the SHST. Moreover, the single-charge driving distance is extended to 327.27 km, an improvement of 8.99% over the heat pump without SHST.

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Compact, efficient, and affordable absorption Carnot battery for long-term renewable energy storage

Sui,

Lin,

Ding

et al. 2024

Applied Energy

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Crystallization-free and low-cost deep eutectic solvents for absorption thermal battery utilizing ultra-low-grade energy

Cited by 16 publications

References 65 publications

Estimation of Component Activities and Molar Excess Gibbs Energy of 19 Binary Liquid Alloys from Partial Pair Distribution Functions in Literature

Estimation of Component Activities and Molar Excess Gibbs Energy of 19 Binary Liquid Alloys from Partial Pair Distribution Functions in Literature

Superhydrophobic Microchannel Heat Exchanger for Electric Vehicle Heat Pump Performance Enhancement

Compact, efficient, and affordable absorption Carnot battery for long-term renewable energy storage

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