Pub Date : 2023-11-01DOI: 10.1615/jenhheattransf.2023050076
Amitabh Narain, Divya Pandya, Joshua Damsteegt, Stephen Loparo
Controlled but explosive growth in vaporization rates is made feasible by ultrasonic heating of the microlayers associated with micro-scale nucleating bubbles within the microstructured boiling surface/region of a millimeter scale heat exchanger. Such bubbles arise from saturated partial flow-boiling operations of Novec 3M’s 649, HFE (hydrofluoroether)-7000 (3M™ Novec™ 7000 Engineered Fluid Product Information, 2022). Experiments use layers of woven copper mesh to form a microstructured boiling surface/region and its nano/micro-scale amplitude ultrasonic (~1 - 6 MHz) and sonic (< 2 kHz, typically) vibrations – induced by a pair of very thin ultrasonic Piezoelectric-transducers (termed Piezos) that are placed and actuated from outside the heat-sink. The ultrasonic frequencies are for sub-structural micro vibrations whereas the lower sonic frequencies are for suitable resonant structural micro-vibrations that assist in bubble removal and liquid filling processes. The flow and the Piezos’ actuation control allow an approximately 5-fold increase in heat transfer coefficient (HTC) value – going from about 9000 W/m2-°C (no Piezos case) to 50000 W/m2-°C at a representative heat flux of about 25 W/cm2. The partial boiling approach is designed to lead to approximately separated vapor and liquid flows (with 0.4-0.6 range exit quality) out of the 5 cm x 1 cm x 5 mm flow channel’s two exit ports. Further, significant increases to current critical heat flux (CHF) values (~70 W/cm2) are possible and are to be reported elsewhere. The electrical energy consumed for generating nano-/micro-meter amplitude vibrations is small (< 3 %) by design (< 3.5 W for 125 W heat remov
{"title":"A Combined Active (Piezos) and Passive (Microstructuring) Partial Flow-Boiling Approach for Stable High Heat-Flux Cooling with Dielectric Fluids","authors":"Amitabh Narain, Divya Pandya, Joshua Damsteegt, Stephen Loparo","doi":"10.1615/jenhheattransf.2023050076","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023050076","url":null,"abstract":"Controlled but explosive growth in vaporization rates is made feasible by ultrasonic heating of the microlayers associated with micro-scale nucleating bubbles within the microstructured boiling surface/region of a millimeter scale heat exchanger. Such bubbles arise from saturated partial flow-boiling operations of Novec 3M’s 649, HFE (hydrofluoroether)-7000 (3M™ Novec™ 7000 Engineered Fluid Product Information, 2022). Experiments use layers of woven copper mesh to form a microstructured boiling surface/region and its nano/micro-scale amplitude ultrasonic (~1 - 6 MHz) and sonic (< 2 kHz, typically) vibrations – induced by a pair of very thin ultrasonic Piezoelectric-transducers (termed Piezos) that are placed and actuated from outside the heat-sink. The ultrasonic frequencies are for sub-structural micro vibrations whereas the lower sonic frequencies are for suitable resonant structural micro-vibrations that assist in bubble removal and liquid filling processes.\u0000The flow and the Piezos’ actuation control allow an approximately 5-fold increase in heat transfer coefficient (HTC) value – going from about 9000 W/m2-°C (no Piezos case) to 50000 W/m2-°C at a representative heat flux of about 25 W/cm2. The partial boiling approach is designed to lead to approximately separated vapor and liquid flows (with 0.4-0.6 range exit quality) out of the 5 cm x 1 cm x 5 mm flow channel’s two exit ports. Further, significant increases to current critical heat flux (CHF) values (~70 W/cm2) are possible and are to be reported elsewhere. The electrical energy consumed for generating nano-/micro-meter amplitude vibrations is small (< 3 %) by design (< 3.5 W for 125 W heat remov","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"187 3","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138508433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"IN CELEBRATION OF PROFESSOR JOHN RICHARD THOME ON HIS 70TH BIRTHDAY","authors":"Lixin Cheng, Bofeng Bai, Guodong Xia, Hai-Bin Zhang, Zhixiong Guo","doi":"10.1615/jenhheattransf.2023047616","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023047616","url":null,"abstract":"N/A","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"28 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138531525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023048332
Y. Ge, Xinyu Zhang
{"title":"Performance optimization of supercritical CO2 gas heater in a biomass-CO2 power generation system","authors":"Y. Ge, Xinyu Zhang","doi":"10.1615/jenhheattransf.2023048332","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023048332","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"48 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72622482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023046892
Haoran Hong, Xiaojing Ma, Jingliang Xu, Yong Ren
{"title":"Investigation on Droplet Evaporation Considering Radiation Heat Transfer by a Developed Lattice Boltzmann Model","authors":"Haoran Hong, Xiaojing Ma, Jingliang Xu, Yong Ren","doi":"10.1615/jenhheattransf.2023046892","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023046892","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"44 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76013854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023047433
N. Mousavi, Muhammad Tashfeen Syed, Prabodh Panindre, Sunil Kumar
{"title":"Heat transfer in a form-stable direct-contact latent thermal energy storage unit","authors":"N. Mousavi, Muhammad Tashfeen Syed, Prabodh Panindre, Sunil Kumar","doi":"10.1615/jenhheattransf.2023047433","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023047433","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"85 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84085313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023048683
Yifan Li, Xiaojun Xiong, Chen Zhao, Wei Yu
{"title":"Recent Progress on Heat Transfer Performance and Influencing Factors of Different Microchannel Heat Sinks","authors":"Yifan Li, Xiaojun Xiong, Chen Zhao, Wei Yu","doi":"10.1615/jenhheattransf.2023048683","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023048683","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"4 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86836606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023046987
Yusheng Li, X. Lei, Yahui Wang
{"title":"Experimental study on the heat transfer characteristics of carbon dioxide in the straightly-ribbed tubes","authors":"Yusheng Li, X. Lei, Yahui Wang","doi":"10.1615/jenhheattransf.2023046987","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023046987","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"34 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82180461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023049793
Lixin Cheng, G. Xia, Zhixiong Guo
{"title":"Preface: Special Issue on Advanced Thermal Management, Energy Conversion and Storage Technologies","authors":"Lixin Cheng, G. Xia, Zhixiong Guo","doi":"10.1615/jenhheattransf.2023049793","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023049793","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"4 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87924236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023049776
Gui-kang Liu, Jing Wang, Yong-qiang Chen, Shou-yu Shi
Power batteries for new energy vehicles and other high-power electrical devices benefit greatly from liquid-cooled plates for thermal control. In the present work, a liquid-cooled plate with a double-layer arc-channel structure was developed to achieve a uniform temperature distribution on the surface of lithium-ion power batteries and lower operating temperature. Numerical simulation was employed to examine the flow properties and heat transfer capabilities of the plate. Subsequently, the model was validated through experiments. The structure of the liquid-cooled plate was optimized using a genetic algorithm. The fitness function was utilized to minimize the dimensionless number representing the pump power required to enable the working fluid to absorb one joule of heat energy and optimize the entropy generation of the liquid-cooled plate. The performance of the two optimization techniques was contrasted. The maximum temperature of the plate was reduced by 2.58 K and 0.14 K, and the standard deviation of the temperature was reduced by 0.685 K and 0.408 K after the optimization using the creatively established dimensionless number and the entropy generation minimization methods, respectively. The pump work required by the working fluid to absorb one joule of heat energy from the plate was reduced by 70.5% and 12.1%. The liquid-cooled plate with a double-layer arc-channel structure had significantly higher energy efficiency than the plates with serpentine and parallel channels.
{"title":"Energy efficiency improvement and entropy generation minimization through structural optimization of a double-layer liquid-cooled plate with circular arc-shaped flow channels","authors":"Gui-kang Liu, Jing Wang, Yong-qiang Chen, Shou-yu Shi","doi":"10.1615/jenhheattransf.2023049776","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023049776","url":null,"abstract":"Power batteries for new energy vehicles and other high-power electrical devices benefit greatly from liquid-cooled plates for thermal control. In the present work, a liquid-cooled plate with a double-layer arc-channel structure was developed to achieve a uniform temperature distribution on the surface of lithium-ion power batteries and lower operating temperature. Numerical simulation was employed to examine the flow properties and heat transfer capabilities of the plate. Subsequently, the model was validated through experiments. The structure of the liquid-cooled plate was optimized using a genetic algorithm. The fitness function was utilized to minimize the dimensionless number representing the pump power required to enable the working fluid to absorb one joule of heat energy and optimize the entropy generation of the liquid-cooled plate. The performance of the two optimization techniques was contrasted. The maximum temperature of the plate was reduced by 2.58 K and 0.14 K, and the standard deviation of the temperature was reduced by 0.685 K and 0.408 K after the optimization using the creatively established dimensionless number and the entropy generation minimization methods, respectively. The pump work required by the working fluid to absorb one joule of heat energy from the plate was reduced by 70.5% and 12.1%. The liquid-cooled plate with a double-layer arc-channel structure had significantly higher energy efficiency than the plates with serpentine and parallel channels.","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135106364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/jenhheattransf.2023048252
Libo Li, Jiyuan Bi, Xiaoxu Zhang, Bo Yang, Qiuwan Wang, T. Ma
{"title":"Numerical study on flow and heat transfer and performance of a novel multi-layer mini-channel heat exchanger with low axial heat conduction","authors":"Libo Li, Jiyuan Bi, Xiaoxu Zhang, Bo Yang, Qiuwan Wang, T. Ma","doi":"10.1615/jenhheattransf.2023048252","DOIUrl":"https://doi.org/10.1615/jenhheattransf.2023048252","url":null,"abstract":"","PeriodicalId":50208,"journal":{"name":"Journal of Enhanced Heat Transfer","volume":"16 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79869974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：