scholarly journals The Energy Storage Properties of Refrigerants (R170, R134a, R143a, and R152a) in Mof-5 Nanoparticles: A Molecular Simulation Approach

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3577 ◽  
Author(s):  
Qiang Wang ◽  
Zhengyong Huang ◽  
Shucheng Ou ◽  
Ruiqiang Zhang
Keyword(s):  
Energy Storage ◽  
Storage Capacity ◽  
Metal Organic Framework ◽  
Energy Storage Capacity ◽  
Enthalpy Difference ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Storage Properties ◽  
Energy Storage Property ◽  
Storage Property

The thermophysical properties of refrigerant can be modified via adding solid materials to it. In this paper, molecular simulations and thermodynamic calculations were employed to investigate the adsorption and energy storage of ethane (R170), 1,1,1,2-tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a), and 1,1-difluoroethane (R152a) in metal organic framework (MOF)-5 nanoparticles. The results show that the fluorine atom in the refrigerants will strengthen the adsorption of refrigerants in MOF-5. However, the fluorine-free refrigerant, R170, owns larger enthalpy difference of desorption than the other refrigerants with fluorine under high pressure. The thermal energy storage capacity of the refrigerant/MOF-5 mixture is larger than that of the pure refrigerant at low pressure. Also, the negative enhancement of the energy storage property of the mixture is found in some cases when the refrigerant experiences phase transition.

A novel metal–organic framework derived carbon nanoflower with effective electromagnetic microwave absorption and high-performance electrochemical energy storage properties

2021 ◽  
Author(s):  
Liwei Zhu ◽  
Ning Liu ◽  
Xincheng Lv ◽  
Ziqiu Zhang ◽  
Liangmin Yu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Microwave Absorption ◽  
High Performance ◽  
Metal Organic Framework ◽  
Electrochemical Energy Storage ◽  
Carbon Nanomaterial ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Storage Properties ◽  
Electrochemical Energy

A novel carbon nanomaterial with unique morphology was prepared and proven to be an effective material for EMWA and electrochemical energy storage.

scholarly journals Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2521 ◽  
Author(s):  
Yingjie Zhou ◽  
Qibin Li ◽  
Qiang Wang
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Metal Organic Framework ◽  
Pure Water ◽  
Molecular Simulations ◽  
Working Fluid ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Storage Properties

The thermal energy storage properties of a working fluid can be modified by the exothermic and endothermic adsorption and desorption of fluid molecules in the micro/nanoporous materials. In this study, thermogravimetric (TG) analysis experiments and molecular simulations (molecular dynamics, MD, and grand canonical Monte Carlo, GCMC) were employed to examine the thermal energy storage properties of the UIO-66 metal organic framework material, UIO-66/H2O nanofluids and pure water. Our results showed that the molecular simulation calculations were, in principle, consistent with the obtained experimental data. The thermal energy storage performance of UIO-66/H2O nanofluids was enhanced with the increase in the UIO-66 mass fraction. In addition, the differences between the simulation calculations and experimental results could be mainly ascribed to the different structures of UIO-66 and the evaporation of fluid samples. Furthermore, this work indicated that molecular simulations contributed to developing novel working pairs of metal organic heat carriers (MOHCs).

Enhanced Energy Storage Properties of La and Zr Modified Bi0.5(Na0.82K0.18)0.5TiO3 Based Ceramics

2016 ◽  
Vol 852 ◽  
pp. 889-893 ◽  
Author(s):  
Yang Yang Zhao ◽  
Ji Wen Xu ◽  
Chang Rong Zhou ◽  
Chang Lai Yuan ◽  
Qing Ning Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State Reaction Method ◽  
Dense Structure ◽  
Conventional Solid State Reaction ◽  
Optimum Energy ◽  
Structure Surface ◽  
Energy Storage Properties ◽  
Storage Properties ◽  
Energy Storage Property ◽  
Storage Property

The [Bi0.5(Na0.82K0.18)0.5]1-xLaxTi1-yZryO3 (BNKLZT) energy storage ceramics were prepared by conventional solid-state reaction method. Structure, surface morphology, dielectric, ferroelectric and energy storage properties of the BNKLBZT ceramics were investigated. The BNKLZT ceramics showed perovskite, homogeneous and dense structure. Grain size was coarsened by Zr doping, and refined by La doping. Low remnant polarization (Pr) and coercive field (Ec), slim P-E loops were obtained by introducing La and Zr dopants. The optimum energy storage property was obtained for the composition of La=0.03 and Zr=0.03, with energy storage density of 0.84 J/cm3 at 80 kV/cm.

Molecular simulation study for adsorption and thermal energy storage analysis of refrigerants (R170, R161, R152a, and R143a) mixed with UIO-67 nanoparticles

2020 ◽  
Vol 34 (30) ◽  
pp. 2050334
Author(s):  
Fei Yan ◽  
Qiang Wang ◽  
Shucheng Ou ◽  
Ruiqiang Zhang ◽  
Guoqiang Wang
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Fluorine Atom ◽  
Metal Organic Framework ◽  
Simulation Method ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Adsorption Desorption ◽  
Thermodynamic Energy

Generally, with the help of adding solid materials, the thermophysical behaviors of refrigerant can be modified. In this work, four kinds of organic refrigerants (i.e. ethane R170, 1-fluoroethane R161, 1,1-difluoroethane R152a, and 1,1,1-trifluoroethane R143a) mixed with metal–organic framework UIO-67 nanoparticles are selected as the objects, their thermodynamic energy, adsorption, desorption heat, and energy storage properties are investigated by means of molecular simulations and thermodynamic calculations. The simulation method and calculation details are elaborated. The results illustrate that the relationship between the change of thermodynamic energy and the temperature is linear, and the adsorption of refrigerants in UIO-67 can be reinforced owing to the fluorine atom in the refrigerants. However, R170, the fluorine-free refrigerant, has greater enthalpy variation of desorption than the other three refrigerants containing fluorine atom under some pressures. The thermal energy storage capacity of the refrigerant/UIO-67 mixture is greater than that of the pure refrigerant at low pressure. Meantime, as the refrigerant undergoes phase transition, the weakened improvement of the energy storage property of the refrigerant/UIO-67 mixture is found in some cases. This work can not only enrich the content of researches about metal–organic heat carrier nanofluids (MOHCs), but also provide guidance for the performance improvement and practical application of organic refrigerants.

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