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Thermodynamic analysis and optimization design of cooling plate with multiple channels for linear synchronous motor 直线同步电机多通道冷却板的热力学分析与优化设计
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221111053d
F. Du, Yang Bo, Tangjia Zhang
{"title":"Thermodynamic analysis and optimization design of cooling plate with multiple channels for linear synchronous motor","authors":"F. Du, Yang Bo, Tangjia Zhang","doi":"10.2298/tsci221111053d","DOIUrl":"https://doi.org/10.2298/tsci221111053d","url":null,"abstract":"A liquid cooling plate structure with multiple channels is proposed for linear synchronous motor in this paper. Firstly, a conjugate heat dissipation model is established, and coupling analysis with fluid and temperature fields is performed by finite volume method with different channel numbers and section shapes. The simulation results show that, the cooling capacity of proposed cooling plate is observably improved, especially for 6-channels cooling plate with elliptical section. Afterwards, adopting boundary optimization by quadratic approximation algorithm, the section dimensions of 6-channels plate with elliptical section are further optimized to realize a trade-off with heat transfer coefficient and pump power. The optimized scheme can improve heat transfer coefficient by 33.03% and reduce the pressure drop by 85.37% compared with original scheme.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68250040","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}
引用次数: 0
Special solutions for the Laplace and diffusion equations associated with the algebraic number field 与代数数场相关的拉普拉斯方程和扩散方程的特殊解
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221113006y
Xiao-jun Yang, N. Sweilam, M. Bayram
{"title":"Special solutions for the Laplace and diffusion equations associated with the algebraic number field","authors":"Xiao-jun Yang, N. Sweilam, M. Bayram","doi":"10.2298/tsci221113006y","DOIUrl":"https://doi.org/10.2298/tsci221113006y","url":null,"abstract":"This article is devoted to the even entire functions, which are the exact solution for the Laplace and diffusion equations. These functions are considered in the algebraic number field. We guess that the functions have purely real zeros in the entire complex plane. These are proposed as new connections with algebraic number theory and mathematical physics","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68250083","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}
引用次数: 0
The influence of temperature on geothermal power plant performance based on geology in Huangshadong geothermal field, China 基于地质的黄沙洞地热田温度对地热发电厂性能的影响
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221215079l
C. Luo, Lichang Huang, Jiawei He, Huiwen Huang, S. Cai
{"title":"The influence of temperature on geothermal power plant performance based on geology in Huangshadong geothermal field, China","authors":"C. Luo, Lichang Huang, Jiawei He, Huiwen Huang, S. Cai","doi":"10.2298/tsci221215079l","DOIUrl":"https://doi.org/10.2298/tsci221215079l","url":null,"abstract":"The geological structure is rather complicated in Guangdong province, in China. The 10 deep fault belts are mainly oriented in NE. The NE fault belts are good channels for deep thermal energy upwelling, which can form a geothermal water reservoir zone. The heating of atmospheric precipitation and surface water by deep rocks is the primary formation mechanism for the hydrothermal resources in the Huangshadong geothermal field. The results show that the two-stage conversion system of flash-binary is more reasonable when the geofluid temperature is higher than 130oC. With every 10oC increment of geofluid temperature for flash-binary system, the power output and exergy efficiency increase by 21.6-38.7% and 6.0-13.1% respectively. The power output and exergy efficiency will decrease by about 20-40% when cooling temperature arising from 15 to 25oC. The research will provide the basic data for the demonstration of geothermal resource exploitation.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68251129","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}
引用次数: 0
Methodology for aeroacoustic noise analysis of 3-bladed h-Darrieus wind turbine 三叶片h-Darrieus风力机气动噪声分析方法
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2301061d
Mirko Dinulović, M. Trninic, B. Rašuo, Dejan Kožović
{"title":"Methodology for aeroacoustic noise analysis of 3-bladed h-Darrieus wind turbine","authors":"Mirko Dinulović, M. Trninic, B. Rašuo, Dejan Kožović","doi":"10.2298/tsci2301061d","DOIUrl":"https://doi.org/10.2298/tsci2301061d","url":null,"abstract":"The present paper presents the aeroacoustic calculation methodology for the H-Darrieus wind turbine. The CFD analysis, for different wind turbine blades? angles of attack, coupled with the noise analysis, based on Lighthill and Prudmann models is performed. This type of turbine is of particular interest since it is insensitive to wind direction and can be used in urban areas. In this study commercial software, ANSYS is used for CFD and aeroacoustic analysis. The required turbulent flow field is calculated based on the standard k-? model, and reequired model constants are obtained experimentally in a low-Mach number wind tunnel. The noise levels generated by operating turbine are calculated based on Lighthill and Proudman's aeroacoustic theories. It was found that the methodology presented can be efficiently used in noise analysis of vertical axes wind turbines and due to recent strict noise regulations has to be deployed at the early design stages.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68256413","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}
引用次数: 0
Thermodynamics of bacteria-phage interactions T4 and Lambda bacteriophages, and E. coli can coexist in natural ecosystems due to the ratio of their Gibbs energies of biosynthesis T4、Lambda噬菌体和大肠杆菌由于其生物合成吉布斯能的比例，可以在自然生态系统中共存
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2301411p
M. Popovic
{"title":"Thermodynamics of bacteria-phage interactions T4 and Lambda bacteriophages, and E. coli can coexist in natural ecosystems due to the ratio of their Gibbs energies of biosynthesis","authors":"M. Popovic","doi":"10.2298/tsci2301411p","DOIUrl":"https://doi.org/10.2298/tsci2301411p","url":null,"abstract":"The model of T4 phage, Lambda phage, and E. coli is often used in research on virus-host interactions. This paper reports for the first time the thermodynamic driving force of biosynthesis, catabolism and metabolism for the three organisms, on the M9 medium. Moreover, the influence of activities of nutrients and metabolic products is analyzed. All three organisms were found to have very similar Gibbs energies of metabolism. Moreover, since they share the same catabolism, their Gibbs energies of catabolism are identical. However, Gibbs energies of biosynthesis differ. The calculated thermodynamic properties have been used to explain the coexistence of both bacteria and phages in a dynamic equilibrium in natural ecosystems.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68256770","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}
引用次数: 7
Experimental study on heat transfer enhancement of heat storage material for energy pile 能量桩蓄热材料强化传热的实验研究
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2301591y
Jun Yan, Song Gao
{"title":"Experimental study on heat transfer enhancement of heat storage material for energy pile","authors":"Jun Yan, Song Gao","doi":"10.2298/tsci2301591y","DOIUrl":"https://doi.org/10.2298/tsci2301591y","url":null,"abstract":"As a kind of clean and renewable energy, shallow geothermal energy has the characteristics of wide distribution and huge reserves. The use of pile foundation heat exchange for building heating is a new technology to realize the effective utilization of geothermal energy. Improving the mechanical properties of the pile body material and improving the heat exchange efficiency of the pile foundation concrete will effectively promote the application of concrete in building structures. In this paper, the effect of steel fiber content on the thermal conductivity and mechanical strength of concrete is discussed by carrying out physical and mechanical properties test of concrete material of pile body. It is proposed to incorporate steel fibers into the concrete of the pile body to improve its thermal conductivity, thereby improving its heat transfer efficiency per unit time. At the same time, the role of steel fiber in enhancing heat transfer performance in pile material is analyzed from the microscopic mechanism, which provides theoretical support for the optimization process of concrete ratio of pile foundation in practical engineering.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68257259","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}
引用次数: 0
Fractional dual-phase-lag heat conduction with periodic heating and photothermal response 具有周期性加热和光热响应的分数双相滞后热传导
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230201086s
A. Somer, A. Novatski, M. Lenzi, S. Da, E. Lenzi
{"title":"Fractional dual-phase-lag heat conduction with periodic heating and photothermal response","authors":"A. Somer, A. Novatski, M. Lenzi, S. Da, E. Lenzi","doi":"10.2298/tsci230201086s","DOIUrl":"https://doi.org/10.2298/tsci230201086s","url":null,"abstract":"We apply an extension of dual-phase lag in thermal systems to predict the photoacoustic (PA) signal for transmission configuration and characteristics of the Open Photoacoustic Cell (OPC) technique. For this, we consider a particular case from Jeffrey?s equation as an extension of the generalized Cattaneo equations (GCEs). In this context, we obtain the temperature distribution under the effects of fractional differential operators, allowing the calculation of the Photoacoustic signal for the transmission setup. The results show a rich class of behaviors related to the anomalous diffusion connected to these fractional operators.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68258505","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}
引用次数: 0
Modelling of mixed thermodynamic model based on new materials 基于新材料的混合热力学模型建模
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2302067g
Chengwei Geng
{"title":"Modelling of mixed thermodynamic model based on new materials","authors":"Chengwei Geng","doi":"10.2298/tsci2302067g","DOIUrl":"https://doi.org/10.2298/tsci2302067g","url":null,"abstract":"In order to solve the problem of the performance of mixed alkane phase change energy storage materials, this paper proposes the modelling research of mixed thermodynamic model based on new materials. In this paper, the thermodynamic performance of binary mixed alkane system is studied, the influence of phase transition temperature, phase transition enthalpy and its composition on the mixed alkane system is explored, and its solid-liquid phase diagram is drawn. We used different thermodynamic models to predict the phase transition temperature and enthalpy in the melting process of binary mixed alkanes, which were mutually verified with the experimental results. The experimental results show that C9-C10 and C9-C11 systems exhibit eutectic behavior. The eutectic components are 88% (mass fraction, the rest is the same) C9-12% C10 and 90% C9-10% C11. The eutectic temperatures are 218.25 K and 215.15 K, respectively. The C8-C9 system has peritectic phenomenon, C10-C11 system shows complete mutual solubility, and their mini?mum melting points are 200.25 K and 234.35 K, respectively. Conclusion is that the C9-C10 and C9-C11 eutectic systems are suitable for low temperature phase change materials in the temperature range of 210-220 K, providing data reference for their application in low temperature energy storage.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68259197","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}
引用次数: 0
Heat management system of electric vehicle based on heat pump and energy recovery of removable battery 基于热泵和可拆卸电池能量回收的电动汽车热管理系统
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2302215x
Yuanfei Xue, Xudong Diao, Xin Li
{"title":"Heat management system of electric vehicle based on heat pump and energy recovery of removable battery","authors":"Yuanfei Xue, Xudong Diao, Xin Li","doi":"10.2298/tsci2302215x","DOIUrl":"https://doi.org/10.2298/tsci2302215x","url":null,"abstract":"In order to manage the air-conditioning thermal system, battery thermal system and motor thermal system in a unified manner, the author proposes a self-developed integrated thermal management system for electric vehicles to recover battery energy. Firstly, the problems in the development of electric vehicles and the importance of thermal management system are introduced, secondly, the self-developed thermal management system scheme and the principle of each part are analyzed, the experimental results of thermal system in enthalpy difference chamber are also introduced. The experimental results show that: Under the double evaporation system, when the compressor speed is 4500 rpm, the maximum COP is 2.46, and the maximum COP charge is 1180 g, the maximum heat transfer capacity is 4819 W (wind side heat transfer + water side heat transfer), the evaporation temperature is 5.35?C, the evaporation superheat is 9.5?C, the condensation temperature is 59.3?C, the undercooling degree is 10.4?C, the suction pressure is 280 kPa, and the exhaust pressure is 1694 kPa. In conclusion, the thermal management system has great energy saving effect, which ensures that the electric vehicle range will not be greatly attenuated under winter heating conditions, and meets the requirements of comfort.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68259819","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}
引用次数: 2
Theoretical and numerical analysis of the fixed flat-plate solar collector with Sn-Al2O3 selective absorber and gravity water flow 具有Sn-Al2O3选择性吸收和重力水流的固定平板太阳能集热器的理论和数值分析
IF 1.7 4区 工程技术
Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230225100n
A. Nešović, N. Lukic, D. Cvetkovic, Miljan Marašević, Marko Topalovic
{"title":"Theoretical and numerical analysis of the fixed flat-plate solar collector with Sn-Al2O3 selective absorber and gravity water flow","authors":"A. Nešović, N. Lukic, D. Cvetkovic, Miljan Marašević, Marko Topalovic","doi":"10.2298/tsci230225100n","DOIUrl":"https://doi.org/10.2298/tsci230225100n","url":null,"abstract":"This paper presents two methods (theoretical and numerical) for the thermal analysis of the previously experimentally installed solar collector construction at the Faculty of Engineering in Kragujevac - a fixed flat-plate solar collector with Sn-Al2O3 selective absorber and gravity water flow. The theoretical research was based on the application of a specific calculation algorithm with a triple iterative procedure, i.e. with a three-stage check of all important performance indicators of the fixed flat-plate solar collector. In the numerical phase of the research, Simple Linear Regression was applied to experimentally measured values of solar radiation intensity and experimentally determine values of heat power to form simple equations that could be used to predict the thermal performance of similar solar structures in the future. The results of theoretical and numerical studies showed agreement with experimental studies, because in the first case, the absolute measurement error was less than 10%, while in the second case, the determination coefficient was greater than 90%, so the authors hope that this work will be useful to the wider scientific community.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68260251","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}
引用次数: 0
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