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

Performance optimization and investigation on the of transcritical CO2 hybrid sources heat pump system in petroleum heating application 跨临界CO2混合源热泵系统在石油供热中的性能优化与研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-07 DOI: 10.1016/j.ijrefrig.2025.04.012

Dongxue Zhu , Chaohe Fang , Shejiao Wang , Yafei Xue , Liaoliang Jiang , Yuanhao Chu , Yulong Song , Feng Cao

{"title":"Performance optimization and investigation on the of transcritical CO2 hybrid sources heat pump system in petroleum heating application","authors":"Dongxue Zhu , Chaohe Fang , Shejiao Wang , Yafei Xue , Liaoliang Jiang , Yuanhao Chu , Yulong Song , Feng Cao","doi":"10.1016/j.ijrefrig.2025.04.012","DOIUrl":"10.1016/j.ijrefrig.2025.04.012","url":null,"abstract":"<div><div>This paper provides a novel transcritical CO<sub>2</sub> heat pump heat recovery unit, and theoretically simulates the system performance characteristics. After experimentally verifying the simulation results with experimental data, various factors that affecting the system performance are analyzed in detail in order to assess the system operating stability under varying operating conditions. Carbon dioxide is used as the working medium and the system stability is optimized under extraordinary operating conditions, especially the significant effects of gas cooler and evaporator inlet and outlet water temperatures on the system performance are analyzed in depth. In addition, this paper systematically compares the carbon emissions of the CO<sub>2</sub> heat pump system, electric heating and direct combustion of natural gas, proving that the CO<sub>2</sub> heat pump system not only has significant advantages in reducing energy consumption and carbon emissions, but also provides a broad space for realizing the goal of energy saving and emission reduction.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"177 ","pages":"Pages 168-180"},"PeriodicalIF":3.5,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270667","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

RE170 (Dimethyl Ether) and ternary mixtures (R744 / RE170 / R600) as alternatives to R290 for refrigeration and heat pump applications RE170（二甲醚）和三元混合物（R744 / RE170 / R600）作为R290的替代品，用于制冷和热泵应用

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-05 DOI: 10.1016/j.ijrefrig.2025.05.005

Daniel Calleja-Anta, Manel Martínez-Ángeles, Rodrigo Llopis

引用次数: 0

Performance study of dual-layer active magnetic regenerators with different filling ratios in the room temperature magnetic refrigerator 不同填充率双层有源磁蓄热器在室温磁性冰箱中的性能研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-05 DOI: 10.1016/j.ijrefrig.2025.05.003

Jiaxin Li , Peng Hai , Zhenxing Li , Xinqiang Gao , Zhaojun Mo , Jun Shen

{"title":"Performance study of dual-layer active magnetic regenerators with different filling ratios in the room temperature magnetic refrigerator","authors":"Jiaxin Li , Peng Hai , Zhenxing Li , Xinqiang Gao , Zhaojun Mo , Jun Shen","doi":"10.1016/j.ijrefrig.2025.05.003","DOIUrl":"10.1016/j.ijrefrig.2025.05.003","url":null,"abstract":"<div><div>Magnetic refrigeration technology is a solid-state cooling technology based on the magnetocaloric effect and possesses significant potential to replace vapor compression cooling technology. However, current magnetic refrigeration systems remain less competitive compared to vapor compression systems in terms of both cooling power density and energy efficiency. Employing a layered regenerator with magnetocaloric materials of different Curie temperatures is one of the promising strategies to improve the performance of magnetic refrigeration systems. Four regenerators composed of a packed bed of 0.36 mm - 0.60 mm Gd and Gd<sub>94</sub>Er<sub>6</sub> spheres were constructed in this paper. The filling ratios were 1:0, 8:2, 6:4, and 4:6 (Gd: Gd<sub>94</sub>Er<sub>6</sub>) respectively. Based on the previous magnetic refrigerator, the performance of four regenerators was evaluated for different operating conditions, which based on the temperature span with zero thermal load, cooling capacity, magnet power consumption, and <em>COP</em>. Experimental results indicate that the regenerator with a filling ratio of 6:4 exhibited optimal temperature span performance under all tested conditions. When operated at 1 Hz frequency, 0.6 utilization factor, and 30 °C hot-side temperature, it achieved a maximum temperature span of 22.7 K with zero thermal load. The magnet power consumption decreases as the filling ratio of Gd<sub>94</sub>Er<sub>6</sub> increases. In consideration of <em>COP</em> values, single-layer Gd regenerator and those with filling ratios of 8:2 and 6:4 perform similarly at a 5 K temperature span, but the regenerator with a 6:4 filling ratio outperforms at spans over 15 K.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 226-237"},"PeriodicalIF":3.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937523","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

A review of axial force balance and clearance sealing techniques for energy-efficient scroll compressors 节能涡旋压缩机轴向力平衡与间隙密封技术研究进展

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-05 DOI: 10.1016/j.ijrefrig.2025.05.002

Hui Wen , Ranran Yan , Lei Liu , Yan Wu , Bingtuo Chen , Wenting Wang , Xiao Qu , Jiongjiong Cai

{"title":"A review of axial force balance and clearance sealing techniques for energy-efficient scroll compressors","authors":"Hui Wen , Ranran Yan , Lei Liu , Yan Wu , Bingtuo Chen , Wenting Wang , Xiao Qu , Jiongjiong Cai","doi":"10.1016/j.ijrefrig.2025.05.002","DOIUrl":"10.1016/j.ijrefrig.2025.05.002","url":null,"abstract":"<div><div>Developing next-generation scroll compressors with higher efficiency and reliability is crucial for promoting energy conservation and emission reduction. Among the key technical challenges encountered, radial gas leakage remains a predominant issue that can severely impair both operating performance and energy consumption. This paper begins by elucidating the flow characteristics and estimation methods for radial leakage. The influence mechanisms for radial leakage and the performance effects are then examined in terms of leakage rate, power consumption and scroll surface wear. The unsteady characteristics of axial gas force, which pose a primary challenge to axial clearance sealing, are analyzed through a combination of theoretical analysis, CFD simulation and experimental measurement. Based on this foundation, this paper provides a comprehensive review of key advancements in axial force balance and clearance sealing techniques, including conventional approaches such as gas back-pressure, oil back-pressure, axial compliance and passive aerodynamic sealing mechanisms as well as emerging solutions like passive magnet and active electromagnet mechanisms, with a focus on their principles, topology, effectiveness, and limitations. Finally, the study highlights key insights and unresolved challenges, recommending hybrid electromagnetic mechanisms as a promising solution that combines the advantages of both passive and active dynamic force balancing techniques.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 298-321"},"PeriodicalIF":3.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941979","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

Performance evaluation of R1336mzz(Z)/TEGDME absorption chiller coupled with low temperature proton exchange membrane fuel cell system R1336mzz(Z)/TEGDME吸收式制冷机耦合低温质子交换膜燃料电池系统的性能评价

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-03 DOI: 10.1016/j.ijrefrig.2025.04.028

Yufan Yang , Chunhuan Luo , Chunting Zhou , Muran He , Lin Lang , Xi Yu , Changchang Yang , Yufan Chen

{"title":"Performance evaluation of R1336mzz(Z)/TEGDME absorption chiller coupled with low temperature proton exchange membrane fuel cell system","authors":"Yufan Yang , Chunhuan Luo , Chunting Zhou , Muran He , Lin Lang , Xi Yu , Changchang Yang , Yufan Chen","doi":"10.1016/j.ijrefrig.2025.04.028","DOIUrl":"10.1016/j.ijrefrig.2025.04.028","url":null,"abstract":"<div><div>The typical operating temperature of a low-temperature proton exchange membrane fuel cell (LT-PEMFC) is approximately 80 °C, with a thermoelectric ratio of approximately 1. To utilize the waste heat of LT-PEMFCs, an absorption chiller (AC) using R1336mzz(Z)/TEGDME as the working pair coupled with LT-PEMFCs vehicles was proposed in this work. The saturated vapor pressure and viscosity of this novel working pair were measured and regressed. The excess enthalpy and specific enthalpy were determined by NRTL model. Based on the thermophysical properties, the performance of the coupled system was investigated under various operating conditions. Results showed that this AC system was able to utilize the waste heat generated by LT-PEMFCs for cooling in the range of 269.1 K to 293.2 K, which can meet the cooling demands of most commercial vehicles. The efficiency of the coupled system was approximately 0.67, which represents a 55.8 % improvement over the standalone LT-PEMFCs system. In typical summer conditions, the coupled system extended the endurance mileage of LT-PEMFCs vehicles by 14 % and saved 12 % of hydrogen in a daily route. Thus, the AC using R1336mzz(Z)/TEGDME coupled LT-PEMFCs vehicles has a great significance for enhancing the performance and enlarging the mileage.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 134-146"},"PeriodicalIF":3.5,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922380","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 on the impact of water spraying parameters on the performance of polypropylene film-based indirect evaporative cooling equipments 喷水参数对聚丙烯膜基间接蒸发冷却设备性能影响的研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-03 DOI: 10.1016/j.ijrefrig.2025.05.001

Tiezhu Sun , Donghua Hu , XiaoLong Yu , Peixuan Li

{"title":"Study on the impact of water spraying parameters on the performance of polypropylene film-based indirect evaporative cooling equipments","authors":"Tiezhu Sun , Donghua Hu , XiaoLong Yu , Peixuan Li","doi":"10.1016/j.ijrefrig.2025.05.001","DOIUrl":"10.1016/j.ijrefrig.2025.05.001","url":null,"abstract":"<div><div>The performance of an indirect evaporative cooler (IEC) is affected by the water distribution method and droplet parameters. This study combines numerical simulations with experimental validation to analyze the impact of factors like spraying method, droplet size, and initial velocity on the cooling efficiency of a polypropylene film-based IEC core. The simulation shows that the air temperature in the channel drops when a vertical directly upper spraying method with 1 mm droplets and an initial velocity of 1.5 m/s is used. Specifically, the temperature stabilizes at 28.2 °C in the directly upper spraying area and 26.6 °C in the directly lower spraying area (with 0.1 mm droplets and 1.5 m/s velocity). The directly lower spraying method reduces the outlet temperature by 1.6 °C, achieving a 23.71 % improvement in cooling performance. The 45° inclined spraying method shows a slight increase of 0.2 °C compared to vertical directly upper spraying, with a 2.5 % decrease in cooling efficiency; in terms of droplet size, the directly upper spraying method works better with 0.8 mm droplets than with 1 mm ones. Larger droplets (1.5 mm or 2.0 mm) lead to an uneven temperature distribution. For the directly lower spraying method, 0.05 mm droplets perform better than 0.08 mm droplets, with larger droplets (0.1 mm or 0.2 mm) causing an uneven distribution. The initial droplet velocity has minimal impact on cooling performance. Overall, the lower vertical spraying method achieves the best cooling performance for the IEC.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 322-335"},"PeriodicalIF":3.5,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949028","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

A feasibility analysis of barocaloric refrigeration using PDMS as a solid-state refrigerant 以PDMS作为固态制冷剂进行高压制冷的可行性分析

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-01 DOI: 10.1016/j.ijrefrig.2025.04.030

Pedro Henrique Oliveira Faria , Alexandre Magnus Gomes Carvalho , Pablo Adamoglu de Oliveira , Paulo Vinicius Trevizoli

{"title":"A feasibility analysis of barocaloric refrigeration using PDMS as a solid-state refrigerant","authors":"Pedro Henrique Oliveira Faria , Alexandre Magnus Gomes Carvalho , Pablo Adamoglu de Oliveira , Paulo Vinicius Trevizoli","doi":"10.1016/j.ijrefrig.2025.04.030","DOIUrl":"10.1016/j.ijrefrig.2025.04.030","url":null,"abstract":"<div><div>Researches on refrigeration based on the i-caloric effects of certain solid refrigerants have gained ground since the end of the last century. The barocaloric type was the least studied so far, however, in the last 10 to 15 years, materials with barocaloric effects of surprisingly large intensities have been discovered, especially elastomers. Because it is a branch of research that is still little investigated, there are few studies aimed at simulating the thermodynamic performance of heat pumps using these materials as refrigerants. In this context, the present study is developed, which uses a transient two-dimensional model to simulate fluid mechanics and heat transfer in an active barocaloric regenerator with parallel plates geometry. The polydimethylsiloxane rubber (PDMS) is selected as the solid-state coolant. The investigation consisted of simulating the cooling capacity provided by the device against the variation of geometric and operational parameters. The results show that the proposed active regenerator is not capable of providing cooling, and its performance is strongly limited by the high thermal inertia of the walls that constitute the polymer compression chamber, as well as the low thermal conductivity of the PDMS.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 158-176"},"PeriodicalIF":3.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929055","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

An experimental study on the effect of water conductivities on the speed skating ice quality during layered making process 分层制冰过程中水电导率对速滑冰质量影响的实验研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-01 DOI: 10.1016/j.ijrefrig.2025.04.032

Yonghui Liang , Mengjie Song , Xianfeng Zhao , Dmitriy A. Uglanov , Mingxu Qi , Zekang Zhen

{"title":"An experimental study on the effect of water conductivities on the speed skating ice quality during layered making process","authors":"Yonghui Liang , Mengjie Song , Xianfeng Zhao , Dmitriy A. Uglanov , Mingxu Qi , Zekang Zhen","doi":"10.1016/j.ijrefrig.2025.04.032","DOIUrl":"10.1016/j.ijrefrig.2025.04.032","url":null,"abstract":"<div><div>The ice surface of speed skating adopts the layered ice-making method, and the actual ice-making process only relies on the experience of the ice maker to adjust the conductivity of the water, which is not guided by the theoretical basis. To study the effect of different conductivity on the characteristics of speed skating ice surface, this study chooses water with equal conductivity gradient to carry out the layered ice-making experiment, and measures the parameters of ice transparency, hardness and air content. The research results indicate that as the conductivity of the ice making water increases, the total ice making time decreases, and the transparency and hardness of the ice also decrease. When the conductivity of water increased from 2 μs/cm to 500 μs/cm, the ice making time decreased by 18.1 %, the Shore hardness of ice decreased by 25.4 %, and the drop ball hardness decreased by 30.5 %. During the layered ice making process of water with higher conductivity, electrolytes will precipitate and accumulate at the freezing front, forming white layered stripes and reducing the transparency of the ice. The conductivity of water increased from 2 μs/cm to 100 μs/cm, while the transparency of ice decreased from 73.8 % to 44.9 %. In this study, conductivity is used as a core regulatory parameter to reveal its quantitative effect on ice performance. The research results can optimize the ice making process of speed skating and enhance the skating and watching experience.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 284-297"},"PeriodicalIF":3.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941978","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

A review of research on intelligent technology in building air conditioning system optimisation 建筑空调系统优化中的智能技术研究综述

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-01 DOI: 10.1016/j.ijrefrig.2025.04.027

Bo Li , Jonathan Chung Ee Yong , Lih Jiun Yu , Ezutah Udoncy Olugu , Xiaoqing Yang , Zhiming Zhang , Mohammed W Muhieldeen

{"title":"A review of research on intelligent technology in building air conditioning system optimisation","authors":"Bo Li , Jonathan Chung Ee Yong , Lih Jiun Yu , Ezutah Udoncy Olugu , Xiaoqing Yang , Zhiming Zhang , Mohammed W Muhieldeen","doi":"10.1016/j.ijrefrig.2025.04.027","DOIUrl":"10.1016/j.ijrefrig.2025.04.027","url":null,"abstract":"<div><div>The Sustainable Development Goals (SDGs) aim to enhance cities and communities more comfortable, safe, and environmentally friendly. The SDGs state that the construction sector should take a low-carbon and sustainable development path. During the operation phase of buildings, the energy consumed by air conditioning systems makes up approximately 22 % of the overall energy consumption of a building. The optimisation of the air conditioning operation control strategy is significant for saving energy and cutting emissions. However, a building air conditioning system is a complex system with multiple parameters, nonlinearity, time variance, and multiple objective values. Traditional air conditioning control methods cannot meet the complex needs of energy saving and comfort improvement in a dynamic environment. Currently, many researchers are studying intelligent technologies for optimising building air conditioning systems. This literature review categorises the relevant articles in this field in recent years, discusses the aspects of optimisation of control methods and the application of intelligent technologies, and focuses on the analysis of the characteristics of various intelligent technologies such as Model Predictive Control, Machine Learning, Deep Learning, and intelligent optimisation algorithms, and their advantages in the domain of optimising control for building air conditioning systems.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 205-225"},"PeriodicalIF":3.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937045","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

Comparative performance analysis of a self-heat recuperation driven ejector subcooling transcritical CO2 refrigeration systems using different throttling devices 采用不同节流装置的自热回收驱动喷射器过冷跨临界CO2制冷系统性能对比分析

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-01 DOI: 10.1016/j.ijrefrig.2025.04.031

Jie Lv, Dewei Lv, Qichao Yang, Yuanyang Zhao, Guangbin Liu, Liansheng Li

{"title":"Comparative performance analysis of a self-heat recuperation driven ejector subcooling transcritical CO2 refrigeration systems using different throttling devices","authors":"Jie Lv, Dewei Lv, Qichao Yang, Yuanyang Zhao, Guangbin Liu, Liansheng Li","doi":"10.1016/j.ijrefrig.2025.04.031","DOIUrl":"10.1016/j.ijrefrig.2025.04.031","url":null,"abstract":"<div><div>Transcritical CO<sub>2</sub> refrigeration system is a crucial technology with great application potential in refrigeration and heat pump areas. However, it faces the challenge of low energy efficiency due to large throttling loss. To improve the system performance, the large amount of waste heat discharged from the compressor in the transcritical CO<sub>2</sub> refrigeration cycles can be utilized to drive the ejector refrigeration cycle to subcooling the outlet CO<sub>2</sub> of gas cooler. A self-heat recuperation driven ejector subcooling transcritical CO<sub>2</sub> refrigeration systems using throttling valve (TVHRS),expander (EXPHRS) and ejector (EJEHRS) as throttling devices are proposed. The energy and exergy models are established, and parametric comparison analysis are conducted on the proposed systems and the baseline cycles. Results show that the cycles with heat recovery have a large improvement both in COP and exergy efficiency <em>η</em><sub>ex</sub> compared to their base cycles. Within the ambient temperature of 35 ∼ 45 °C, the COP of TVHRS, EXPHRS, and EJEHRS is enhanced by 12.5 % ∼ 19.8 %, 6.3 % ∼ 9.6 %, and 5.8 % ∼ 9.6 %, and the <em>η</em><sub>ex</sub> improved by 11.6 % ∼ 20 %, 13.0 % ∼ 19.1 %, and 5.3 % ∼ 9.5 %, respectively. The self-heat recuperation driven ejector subcooling transcritical CO<sub>2</sub> refrigeration systems have a large potential for application.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"176 ","pages":"Pages 106-119"},"PeriodicalIF":3.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922378","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