International Journal of Air-conditioning and Refrigeration最新文献_第5页

The impact of oxygen supply flow rates on the distribution of aerosols between the patient and the surgeon during lung intubation 肺插管期间供氧流量对患者和外科医生之间气溶胶分布的影响

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International Journal of Air-conditioning and Refrigeration Pub Date : 2022-06-28 DOI: 10.1007/s44189-022-00006-4

Tee Lin, O. Zargar, Ming Hu, Chung-Chun Wang, Shih-cheng Hu, G. Leggett

引用次数: 0

An optimization approach in the development of a new correlation for two-phase heat transfer coefficient of R744 in a microchannel 微通道中R744两相传热系数新关联的优化方法

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International Journal of Air-conditioning and Refrigeration Pub Date : 2022-06-15 DOI: 10.1007/s44189-022-00004-6

Wan Muhammad Zaid Wan Zaidi, Yushazaziah Mohd-Yunos, N. Mohd-Ghazali, A. Pamitran, Jong-Taek Oh

引用次数: 1

Techno-economic assessment of a hybrid connected PV solar system 混合并网光伏太阳能系统的技术经济评价

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International Journal of Air-conditioning and Refrigeration Pub Date : 2022-03-28 DOI: 10.1007/s44189-022-00003-7

Hasan Falih, A. Hamed, A. N. Khalifa

引用次数: 4

Numerical analysis of thermoacoustically driven thermoacoustic refrigerator with a stack of parallel plates having corrugated surfaces 具有波纹表面平行板叠的热声驱动热声制冷机的数值分析

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International Journal of Air-conditioning and Refrigeration Pub Date : 2022-02-28 DOI: 10.1007/s44189-022-00002-8

Zahra Bouramdane, A. Bah, Mohammed Alaoui, N. Martaj

引用次数: 5

Investigating the impact of indoor temperature on the performance of the retail commercial refrigeration system 研究室内温度对零售商用制冷系统性能的影响

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International Journal of Air-conditioning and Refrigeration Pub Date : 2022-02-28 DOI: 10.1007/s44189-022-00001-9

Oliver Brownbridge, M. Sully, Joshua Noons, Ibrahim M. Albayati

引用次数: 1

Thermodynamic Evaluation of a Direct Expansion Ground-Sourced Heat Pump with Horizontal Ground Heat Exchangers Using Advanced Exergy Analysis 采用先进的火用分析方法对带水平地热交换器的直接膨胀式地源热泵进行热力学评价

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International Journal of Air-conditioning and Refrigeration Pub Date : 2021-12-28 DOI: 10.1142/s2010132521500371

Abdolazim Zarei, M. Ameri, H. Ghazizade-Ahsaee

{"title":"Thermodynamic Evaluation of a Direct Expansion Ground-Sourced Heat Pump with Horizontal Ground Heat Exchangers Using Advanced Exergy Analysis","authors":"Abdolazim Zarei, M. Ameri, H. Ghazizade-Ahsaee","doi":"10.1142/s2010132521500371","DOIUrl":"https://doi.org/10.1142/s2010132521500371","url":null,"abstract":"This paper deals with the advanced exergetic analysis of a horizontal direct-expansion ground sourced CO2 heat pump operating in a transcritical cycle. The cycle is thermodynamically modeled in Engineering Equation Solver (EES) considering the pressure drops in both high and low temperature heat exchangers, and the system is to provide a fixed heating load. Conventional exergy analysis orderly suggests a compressor, expansion valve, gas cooler and ground heat exchanger to be considered for system improvement, while tracing exergy destruction of all components in detail demonstrates true improvement potential of each and all components and the system as a whole and offers a different order. Advanced exergy analysis points out that the compressor is directly and indirectly responsible for 56% of the overall exergy destruction generated in the cycle, confirming the detrimental role of this component in the system. The second influential component is recognized to be a ground heat exchanger accounting for 20% exergy destruction of the compressor as well as submitting 89% avoidability in its own exergy destruction, and expansion valve proves to be the last option for system improvement according to this analysis.","PeriodicalId":13757,"journal":{"name":"International Journal of Air-conditioning and Refrigeration","volume":"36 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86207380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Using Air Curtains on Energy Consumption During Cooling Season Under Different Climate Conditions 不同气候条件下空气幕对制冷季能耗的影响

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International Journal of Air-conditioning and Refrigeration Pub Date : 2021-12-17 DOI: 10.1142/s2010132521500346

Serkan Erdem, C. Onan

引用次数: 0

A Comparative Performance Study of an Ejector-Expansion Refrigeration Cycle Using R134a and its Alternatives: Application of Automobile Air Conditioning R134a喷射器-膨胀式制冷循环及其替代品的性能对比研究:在汽车空调中的应用

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International Journal of Air-conditioning and Refrigeration Pub Date : 2021-12-17 DOI: 10.1142/s2010132521500358

K. Al‐Chlaihawi, H. Kadhim, Ahmad Hashim Yousif

{"title":"A Comparative Performance Study of an Ejector-Expansion Refrigeration Cycle Using R134a and its Alternatives: Application of Automobile Air Conditioning","authors":"K. Al‐Chlaihawi, H. Kadhim, Ahmad Hashim Yousif","doi":"10.1142/s2010132521500358","DOIUrl":"https://doi.org/10.1142/s2010132521500358","url":null,"abstract":"In this study, the performance of ejector-expansion refrigeration cycle (EERC) with R134a alternative refrigerants (R152a, R1234yf, R404A, R407C, R507A and R600a) for automobile air-conditioning application is investigated numerically. The ejector is modeled with a constant mixing-pressure assumption taking into consideration the friction effect in the ejector mixing section. The studied refrigerants are compared based on the optimum area ratio, discharge temperature, compressor input power, volumetric cooling capacity, exergy destruction, COP, exergy efficiency and COP improvement. The results show that R152a and R1234yf have the closest performance to R134a and can be considered the most suitable alternative refrigerants for R134a. The COP and exergy efficiency are improved by 2.26% and 2.27%, respectively, using R152a compared to the use of R134a, whereas they are reduced by 2.89% and 2.88% using R1234yf. The volumetric cooling capacity is reduced for both R152a and R1234yf by 6.14% and 6.8%, respectively. In addition, the effect of compressor rotational speed on the performances is reported.","PeriodicalId":13757,"journal":{"name":"International Journal of Air-conditioning and Refrigeration","volume":"15 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89260832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental Performance Analysis of R1234yf in an Air-Conditioning System as Substitute of R134a R1234yf替代R134a在空调系统中的试验性能分析

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International Journal of Air-conditioning and Refrigeration Pub Date : 2021-12-09 DOI: 10.1142/s201013252150036x

M. Medany, M. El Morsi, A. R. El-Sayed

引用次数: 0

Comparative Study on Performance of Regenerator for Miniature Pulse Tube Cryocooler with Metal Matrix Materials at Ultra High Frequencies 超高频金属基材料微型脉冲管制冷机蓄热器性能对比研究

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International Journal of Air-conditioning and Refrigeration Pub Date : 2021-12-09 DOI: 10.1142/s2010132521500334

C. O. Yadav, P. Ramana

{"title":"Comparative Study on Performance of Regenerator for Miniature Pulse Tube Cryocooler with Metal Matrix Materials at Ultra High Frequencies","authors":"C. O. Yadav, P. Ramana","doi":"10.1142/s2010132521500334","DOIUrl":"https://doi.org/10.1142/s2010132521500334","url":null,"abstract":"A Miniature Pulse Tube Cryocooler (MPTC) is the first selection for the cooling of IR sensors, infrared detectors, etc. in space technology. The regenerator is one of the key components to operate an MPTC at high efficiency. The objective of this study is to explore the possibilities of the different matrices as regenerator filler materials for MPTC operating at ultra-high frequencies. REGEN 3.3 is one of the best software available for the design and optimization of cryocooler regenerators. We have used REGEN 3.3 for numerical simulations of the three different regenerator matrix materials viz. stainless steel wire mesh screen (SS 635#), brass wire mesh screen (500#) and copper wire mesh screen (500#) at the hot end and cold end temperatures of 300[Formula: see text]K and 80[Formula: see text]K for COP, cooling power, total power losses and pressure losses, at an ultra-high frequency of 100[Formula: see text]Hz and 200[Formula: see text]Hz. The simulation results depict that the regenerator using stainless steel mesh screen shows better results than that of the brass mesh screen and copper mesh screen at 100[Formula: see text]Hz. However, the performance of brass mesh screen and copper mesh screen performs better than the stainless steel at 200[Formula: see text]Hz. Therefore, the proposed matrix materials can be used as regenerator materials for the MPTC at ultra-high frequencies with better performances.","PeriodicalId":13757,"journal":{"name":"International Journal of Air-conditioning and Refrigeration","volume":"15 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86544189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0