International Journal of Refrigeration-revue Internationale Du Froid最新文献_第5页

Performance investigations on nonflammable CO2/HFOs mixtures for an air-source heat pump water heater during wintertime 空气源热泵热水器冬季不可燃CO2/HFOs混合物性能研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-04-03 DOI: 10.1016/j.ijrefrig.2025.03.044

Kaiyin Yang , Zhen Zhao , Yilun Liu , Qin Wang , Long Jiang , Ziqian Xue , Jielin Luo

{"title":"Performance investigations on nonflammable CO2/HFOs mixtures for an air-source heat pump water heater during wintertime","authors":"Kaiyin Yang , Zhen Zhao , Yilun Liu , Qin Wang , Long Jiang , Ziqian Xue , Jielin Luo","doi":"10.1016/j.ijrefrig.2025.03.044","DOIUrl":"10.1016/j.ijrefrig.2025.03.044","url":null,"abstract":"<div><div>With heating demand in buildings on the rise, air-source heat pumps (ASHPs) offer a vital, low-emission alternative to traditional methods. In cold regions, ASHP faces application resistances like combustion and system complexity. These can be mitigated using zeotropic mixtures with hydrofluoroolefins (HFOs). However, the role of ternary mixtures in enhancing performance and safety remains underexplored. This study proposes novel mixtures of CO<sub>2</sub> and HFOs in a simple recuperative configuration. Within the nonflammable range, the optimal ternary mixture CO<sub>2</sub>/R1234ze(E)/R1336mzz(E), shows up to 35.8 % improvement in the coefficient of performance (COP) compared to binary mixtures. Up to 14.3 % enhancement in COP versus a traditional ASHP system is achieved, resulting in an annual performance boost of 7.0 % in cold climates. Exergy analysis indicates the low irreversible losses in throttling and condensing are the main contributors to the improvement. A life cycle assessment reveals both economic and environmental advantages, with reductions in costs and emissions of up to 10.7 % and 25.5 %, respectively. Sensitivity analysis indicates that easily adjustable operating pressures significantly impact COP, but the optimal mixture still maintains high efficiency despite variations. Ternary mixtures also show comparable COP to ASHP using CO<sub>2</sub>, with significant discharge pressure reductions. The proposed mixtures enhance safety, energy efficiency, and system simplicity, supporting the global adoption of ASHP for energy savings and emission reductions, thus advancing carbon neutrality efforts.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 389-399"},"PeriodicalIF":3.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative photoacoustic instrument for fast and accurate detection and localization of R-134a leaks in refrigeration systems 创新的光声仪器，用于快速准确地检测和定位制冷系统中的R-134a泄漏

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-04-03 DOI: 10.1016/j.ijrefrig.2025.04.003

Panna Végh , Bence Molnár , Máté Molnár , Piroska Ailer , Zoltán Bozóki , Helga Huszár

{"title":"Innovative photoacoustic instrument for fast and accurate detection and localization of R-134a leaks in refrigeration systems","authors":"Panna Végh , Bence Molnár , Máté Molnár , Piroska Ailer , Zoltán Bozóki , Helga Huszár","doi":"10.1016/j.ijrefrig.2025.04.003","DOIUrl":"10.1016/j.ijrefrig.2025.04.003","url":null,"abstract":"<div><div>Refrigerant leaks are a common issue that can seriously impact both the performance of refrigeration systems and the environment. The need for reliable and sensitive leak detection has become increasingly critical due to regulatory bans on refrigerants with a high global warming potential. A new potential option for detecting possible leaks in refrigeration installations is the development of a highly sensitive photoacoustic (PA) instrument, which allows for more accurate, faster and easier detection of leakage points in refrigeration equipment than currently commercially available equipment. This article reports on the development of a highly sensitive photoacoustic instrument for the detection and localization of R-134a leaks to identify leaks at rates as low as 1.2 g/year in refrigeration systems. The developed system includes a quantum cascade laser that operates around 10.3 µm with a maximum output power of 84 mW. It features a stainless steel photoacoustic cell with two 40 mm resonator tubes, each with a 3.5 mm inner diameter. This setup ensures the accurate detection of R-134a refrigerant leaks by targeting specific absorption lines. The fast response time, wide dynamic concentration range, and high sensitivity of the PA instrument make it a promising tool for refrigerant leak detection. The paper also discusses spectral interference from other environmental and refrigerant gases, such as water vapor, carbon dioxide, ammonia, methane, propane, and R-32. A detailed finite element model has been developed and implemented in COMSOL Multiphysics 6.2. The simulation results matched the experimental data, validating the accuracy of the PA system.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 164-173"},"PeriodicalIF":3.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ammonia two-phase flow through the horizontal and inclined impacting T-junctions 氨两相流通过水平和倾斜冲击t型结

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-04-02 DOI: 10.1016/j.ijrefrig.2025.04.001

Vasyl Ruzaikin, Ivan Lukashov, Andrii Breus

{"title":"Ammonia two-phase flow through the horizontal and inclined impacting T-junctions","authors":"Vasyl Ruzaikin, Ivan Lukashov, Andrii Breus","doi":"10.1016/j.ijrefrig.2025.04.001","DOIUrl":"10.1016/j.ijrefrig.2025.04.001","url":null,"abstract":"<div><div>The two-phase ammonia flow through the horizontal and inclined impacting T-junctions has been experimentally studied. The phase separation has been investigated in the ID 4, 6 and 10 mm T-junctions at different saturation temperatures (30 to 65 °C), vapour qualities (0.1 to 0.7) and mass fluxes (50 to 300 kg·m<sup>-2</sup>s<sup>-1</sup>). Two separation patterns in the horizontal impacting T-junctions were observed. The first one, vapour momentum-independent, shows weak sensitivity of the phase separation behaviour on the pressure, inlet vapour quality and mass velocity. The second one, vapour momentum-dependent, is characterised by the region with the equal phase distribution between the T-junction outlets. The transition between the phase separation patterns does not depend on the inlet two-phase flow pattern. A straightforward phenomenological model was proposed for the separation pattern identification and the evaluation of the vapour quality in the outlet branch of the horizontal impacting T-junctions with a feasible accuracy of ±20 %. Downward orientation (-45°, -90°) of the T-junction inlet leads to a higher phase maldistribution between the outlets than the upward and horizontal configuration. The effect degrades with the mass velocity increase and diameter reduction. The inclination of the T-junction outlets regarding the horizontal plane enhances the phase separation, with the vapour-rich mixture going to the top outlet. The effect intensifies with the increase in the inclination angle and the decrease in the T-junction mass flow rate ratio.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 235-244"},"PeriodicalIF":3.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic analysis and optimization of an ejector refrigeration system for sustainable cooling applications 喷射式制冷系统的热力分析与优化

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-04-01 DOI: 10.1016/j.ijrefrig.2025.03.004

Nawel Khaldi, Safa Sdiri, Mariem Lazaar

{"title":"Thermodynamic analysis and optimization of an ejector refrigeration system for sustainable cooling applications","authors":"Nawel Khaldi, Safa Sdiri, Mariem Lazaar","doi":"10.1016/j.ijrefrig.2025.03.004","DOIUrl":"10.1016/j.ijrefrig.2025.03.004","url":null,"abstract":"<div><div>Leveraging low-grade waste heat as an energy source has gained significant interest in recent years. Among the promising technologies for this purpose, heat-driven ejector refrigeration systems have emerged as potential solutions for industrial and commercial cooling applications. While these systems hold significant potential, their widespread adoption has been hindered by relatively low coefficients of performance (COP) and the use of environmentally harmful refrigerants.</div><div>This study aims to investigate and optimize ejector refrigeration systems to enhance energy efficiency and ensure sustainable cooling solutions. It involves evaluating the influence of operating parameters and refrigerant selection on system performance, modeled using the Engineering Equation Solver (EES). A comparative analysis of the refrigerants R134a and the environmentally friendly R1234yf is conducted, focusing on key parameters to identify optimal system conditions. Our findings reveal that condensation and evaporation temperatures are crucial factors influencing system performance. While both R134a and R1234yf exhibit similar trends, R1234yf demonstrates superior entrainment ratios under specific operating conditions, making it a promising alternative for sustainable refrigeration systems.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"174 ","pages":"Pages 372-387"},"PeriodicalIF":3.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of optimizing the secondary cylinder size in a novel dual-piston carbon dioxide linear compressor to suppress piston offset 优化新型双活塞二氧化碳直线压缩机副缸尺寸以抑制活塞偏置的研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-31 DOI: 10.1016/j.ijrefrig.2025.03.046

Fanchen Kong , Shanquan Liu , Fang Wang , Shuo Zhang , Guifang Wu , Zhouhang Hu , Mingsheng Tang , Huiming Zou , Changqing Tian

{"title":"Study of optimizing the secondary cylinder size in a novel dual-piston carbon dioxide linear compressor to suppress piston offset","authors":"Fanchen Kong , Shanquan Liu , Fang Wang , Shuo Zhang , Guifang Wu , Zhouhang Hu , Mingsheng Tang , Huiming Zou , Changqing Tian","doi":"10.1016/j.ijrefrig.2025.03.046","DOIUrl":"10.1016/j.ijrefrig.2025.03.046","url":null,"abstract":"<div><div>Based on a previously proposed novel dual-piston two-stage carbon dioxide (CO<sub>2</sub>) linear compressor, this research aims to further inhibit the piston offset and improve overall system performance and efficiency by purposefully exploring the optimal design of the two-stage cylinder diameter. A comprehensive simulation model is developed to analyse the dynamic characteristics and performance implications associated with varying cylinder diameters in the two-stage configuration. The study explores the influence of cylinder diameter on gas forces, piston offset, and compression process leakage. The results show that through the optimized design of the two-stage cylinder diameter, the piston offset can be reduced by >50 % and the relative leakage loss can be reduced by 2.22 %. Under 12 MPa discharge pressure, a relative efficiency improvement of 5.27 % can be achieved. The optimal compressor efficiency is achieved between intermediate pressure index 4 and 5. This result provides valuable guidance for the design of the second-stage piston. Finally, a prototype was developed according to the design principle, and its piston offset suppression effect was validated experimentally. Under a pressure difference close to 0.7 MPa, the piston offset consistently remained below 0.2 mm.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 146-155"},"PeriodicalIF":3.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerodynamic optimization of axial fans mounted on outdoor air conditioning units 室外空调机组轴流风机气动优化研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-29 DOI: 10.1016/j.ijrefrig.2025.03.031

Kisho Hatakenaka , Kenichi Sakoda , Tomoya Fukui , Naohiko Homma , Hironori Yabuuchi , Makoto Tanishima

{"title":"Aerodynamic optimization of axial fans mounted on outdoor air conditioning units","authors":"Kisho Hatakenaka , Kenichi Sakoda , Tomoya Fukui , Naohiko Homma , Hironori Yabuuchi , Makoto Tanishima","doi":"10.1016/j.ijrefrig.2025.03.031","DOIUrl":"10.1016/j.ijrefrig.2025.03.031","url":null,"abstract":"<div><div>In order to improve the efficiency of axial fans used in outdoor air conditioning units, this study proposes a method to optimize blade shapes even amid conditions where axial fans are susceptible to the flow field generated by their surrounding components. A multi-objective optimization problem is formulated and solved using a combined numerical simulation and a genetic algorithm. A system of incompressible Navier-Stokes equations involving the turbulence model and a multiple reference frame approach is performed in steady state using the finite volume method. As a result, the Pareto frontier is obtained for the objective functions defined as the minimization of the shaft power coefficient and the maximization of the flow coefficient. Compared to the conventional optimization method which assumes that the fan is isolated from surrounding components, the fan obtained in this study demonstrates remarkable features, especially around the blade tip. In addition, experimental results show that the optimized fan, which is mounted on the outdoor unit, is more efficient than the baseline fan. The proposed method is capable of simulating the wake generated by the components situated in the upstream area of the fan, which has not been taken into account when it comes to the conventional method.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 210-218"},"PeriodicalIF":3.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compressor-assisted heat transformer for low-grade heat recovery 用于低品位热回收的压缩机辅助热变压器

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-29 DOI: 10.1016/j.ijrefrig.2025.03.045

Tommaso Toppi, Gianluca Abrami, Marcello Aprile

{"title":"Compressor-assisted heat transformer for low-grade heat recovery","authors":"Tommaso Toppi, Gianluca Abrami, Marcello Aprile","doi":"10.1016/j.ijrefrig.2025.03.045","DOIUrl":"10.1016/j.ijrefrig.2025.03.045","url":null,"abstract":"<div><div>The recovery of low-temperature waste heat can be promoted by upgrading its temperature. Heat transformers can increase the temperature of a heat stream while using little electrical energy, at the price of rejecting part of the heat input to a lower temperature sink. However, the lifting capability of heat transformers are limited by the operating conditions and often insufficient to meet the temperature requirements of many applications. An option to overcome this limitation is to use a compressor-assisted heat transformer (CHT), which benefits from the mechanical work of a compressor to expand the lifting capability. This work analyzes two alternative variation of CHT, characterized by a different positioning of the compressor in the thermodynamic cycle: CHTa, with the compressor at low pressure and CHTb with the compressor at high pressure. The CHTb variation showed higher electrical efficiencies (in the range 5–15 vs 1.5–10) and lower maximum compressor temperature (180 vs. 230 °C) than the CHTa, when recovering heat at 60 °C to deliver upgraded heat up to 120 °C. The use of the CHTb is therefore further investigated in four practical applications, assuming heat recovery from data centers, combined heat and power plants, district heating networks and industrial steam as a high temperature sink. In all the applications the CHTb has a higher electrical COP than the one of a reference heat pump, with values ranging from 4.5 to >25.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 118-127"},"PeriodicalIF":3.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the efficiency of a CO2 heat pump for simultaneous heating and cooling coupled with an ambient source 提高与环境源耦合的同时加热和冷却的CO2热泵的效率

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-28 DOI: 10.1016/j.ijrefrig.2025.03.041

Zhaoyang Yuan , Jintao He , Yonghao Zhang , Yu Yao , Hua Tian , Lingfeng Shi , Gequn Shu

{"title":"Improving the efficiency of a CO2 heat pump for simultaneous heating and cooling coupled with an ambient source","authors":"Zhaoyang Yuan , Jintao He , Yonghao Zhang , Yu Yao , Hua Tian , Lingfeng Shi , Gequn Shu","doi":"10.1016/j.ijrefrig.2025.03.041","DOIUrl":"10.1016/j.ijrefrig.2025.03.041","url":null,"abstract":"<div><div>The CO<sub>2</sub> heat pump for simultaneous heating and cooling (CO<sub>2</sub> HPS) is an efficient technology capable of providing both heating and cooling within a single system. With its high energy efficiency and low carbon emissions, the CO<sub>2</sub> HPS has attracted growing attention in both industry and academia. However, the basic CO<sub>2</sub> HPS does not effectively balance the heating and cooling output with the actual load demands, leading to unnecessary energy waste and lower overall system efficiency. To address this issue, this paper proposes four new configurations that introduce ambient sources to regulate the heating and cooling supply-demand balance, while also improving the system structure through the integration of heat recovery and ejector-based loops. These enhancements enable the unit to flexibly and efficiently adjust heating and cooling output according to actual load requirements. The results show that, compared to the basic configuration, the overall coefficient of performance of the four new configurations increases by 0∼14.69 %, 2.77∼19.81 %, 5.66∼17.70 %, and 0.61∼8.40 %, respectively.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 128-145"},"PeriodicalIF":3.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of ternary vapor-liquid equilibrium for refrigerant mixtures containing HFOs: Simple and accurate predictive models 含氢氟烃类制冷剂混合物的三元汽液平衡研究：简单而准确的预测模型

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-28 DOI: 10.1016/j.ijrefrig.2025.03.043

Hong Yuan , Zhiqiang Yang , Christophe Coquelet , Yuanhao Liao , Jijun Zeng , Bo Zhao , Sheng Han , Wei Zhang , Jian Lu

{"title":"Investigation of ternary vapor-liquid equilibrium for refrigerant mixtures containing HFOs: Simple and accurate predictive models","authors":"Hong Yuan , Zhiqiang Yang , Christophe Coquelet , Yuanhao Liao , Jijun Zeng , Bo Zhao , Sheng Han , Wei Zhang , Jian Lu","doi":"10.1016/j.ijrefrig.2025.03.043","DOIUrl":"10.1016/j.ijrefrig.2025.03.043","url":null,"abstract":"<div><div>The refrigeration industry is committed to developing high-performance, environmentally friendly mixed refrigerants to reduce greenhouse gas emissions. A large amount of ternary vapor-liquid equilibrium (VLE) data are required to design and optimize refrigeration systems if a ternary mixture is used as the refrigerant while the efficiency in design and optimization could be improved by accurate ternary VLE predictions. This paper aims to develop an approach to accurately predict ternary VLE for mixtures containing low-GWP hydrofluoroolefin (HFO). Two models, the PRMC model and PPR78 model are utilized respectively for the ternary VLE prediction validation of 13 binary and 3 ternary systems and subdivided into four methods PRMC-T, PRMC-Avg, PPR78-T and PPR78-Avg according to their different models and binary interaction parameters (<em>k<sub>ij</sub></em>). The <em>k<sub>ij</sub></em> of PRMC model is correlated from literature data, and the obtained <em>k<sub>ij</sub></em> is used to fit group-interaction parameters (<span><math><msub><mi>A</mi><mrow><mi>k</mi><mi>l</mi></mrow></msub></math></span> and <span><math><msub><mi>B</mi><mrow><mi>k</mi><mi>l</mi></mrow></msub></math></span>) of PPR78 model. The accuracy of PRMC and PPR78 models are validated based on the literature data, and the results in VLE predictions are carefully analyzed and discussed.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 40-51"},"PeriodicalIF":3.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combining molecular modelling approaches for a holistic thermophysical characterisation of fluorinated refrigerant blends 结合分子建模方法对含氟制冷剂混合物进行整体热物理表征

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-28 DOI: 10.1016/j.ijrefrig.2025.03.026

Daniel Jovell , Gerard Alonso , Pablo Gamallo , Rafael Gonzalez-Olmos , Héctor Quinteros-Lama , Fèlix Llovell

{"title":"Combining molecular modelling approaches for a holistic thermophysical characterisation of fluorinated refrigerant blends","authors":"Daniel Jovell , Gerard Alonso , Pablo Gamallo , Rafael Gonzalez-Olmos , Héctor Quinteros-Lama , Fèlix Llovell","doi":"10.1016/j.ijrefrig.2025.03.026","DOIUrl":"10.1016/j.ijrefrig.2025.03.026","url":null,"abstract":"<div><div>After Montreal Protocol, hydrofluorocarbons (HFCs) appeared to be a permanent solution for replacing previous ozone-depleting substances. However, their utilisation has now progressively decreased following the Kigali Amendment application in 2016 due to their high global warming potential (GWP). Unsaturated HFCs, such as hydrofluoroolefins (HFOs), are considered feasible alternatives due to their high reaction rates and low atmospheric lifetimes, resulting in very low GWP. However, available data on their physicochemical behaviour still needs to be improved, even with the recent increase in the amount of new experimental data for these systems. In this direction, computational tools provide a quick pathway to screen their properties and complete the information obtained from experimental work. In this contribution, two different molecular modelling tools, molecular dynamics (MD) simulations and the soft-SAFT equation of state (EOS), are combined to compute the coexistence densities, vapour pressure, heat capacity, interfacial tension, and dynamic viscosity of several refrigerant blends based on 3rd and 4th generation compounds, in order to provide a thermodynamic analysis of the properties of these mixtures, addressing them for drop-in replacement purposes. Results from MD are compared with REFPROP data and those from soft-SAFT, where the capacities of both modelling methods are addressed. In general, quantitative agreement is achieved using the two approaches, offering a framework to screen these properties for new mixtures.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 412-423"},"PeriodicalIF":3.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0