张信荣
新型能源系统、可再生式热能源、先进节能技术、新型功能性流体构筑及其传热研究、微纳米与生物传热技术、先端海水淡化及污水处理技术等
个性化签名
- 姓名:张信荣
- 目前身份:
- 担任导师情况:
- 学位:
-
学术头衔:
博士生导师
- 职称:-
-
学科领域:
工程热物理
- 研究兴趣:新型能源系统、可再生式热能源、先进节能技术、新型功能性流体构筑及其传热研究、微纳米与生物传热技术、先端海水淡化及污水处理技术等
张信荣
清华大学工学博士,曾任日本东北大学流体科学研究所讲师、日本同志社大学能源研究中心高级研究员等职,现任北京大学工学院能源与资源工程系特聘研究员、日本同志社大学访问教授等职。同时还担任国际京都能源环境论坛执委、国际能源转换学术会议主席等职。具有丰富的科研教学经验,在日本工作期间,讲授《特殊流体工程》、《新能源技术》等课程。目前从事的研究工作主要集中在新型能源系统与技术、温室气体有效利用与管理、废热利用与节能技术以及能源系统中与热力学、传热及流体动力学相关的过程等领域。主持完成了近二十项先端新能源、温室气体(CO2等)有效利用等方面的研究项目,已发表学术论文100余篇,拥有八项发明专利。
研究兴趣及方向
工程热物理及与之相关的各种学术工程领域(Thermal engineering and heat transfer in various academic & Engineering fields)
主要研究兴趣:
新型能源系统、可再生式热能源、先进节能技术、新型功能性流体构筑及其传热研究、微纳米与生物传热技术、先端海水淡化及污水处理技术等。
主要学术研究工作简历
2009(7~8月)加拿大国家研究委员会访问教授
2008~ 日本同志社大学访问教授
2007~ 北京大学,特聘研究员
2007~ 北京科技大学生态系,客座高级研究员
2006(8~9月)挪威科学技术大学能源与石油天然气战略研究部门,客座高级研究员
2006~ 京都国际能源环境论坛执委
2004~2007 日本同志社大学能源研究中心,高级研究员
2002~2004 日本东北大学流体科学研究所,讲师
1998~2002 助研,清华大学工程力学系传热研究室
-
主页访问
1638
-
关注数
0
-
成果阅读
761
-
成果数
15
【期刊论文】A study on flow characteristics of electrorheological fluid in a damper model
张信荣, Hiroshi Yamaguchi, Xin-Rong Zhang, Daisuke Inoue
Computer-Aided Engineering and Software Vol. 26 No.4, 2009 pp. 375-399,-0001,():
-1年11月30日
Purpose-The purpose of this paper is to investigate flow behavior of electrorheological (ER) fluid in a closed piston-cylinder system. Design/methodology/approach -A basic study of flow characteristics of ER fluid in a damper model is conducted experimentally and numerically. The electric field is applied between inner wall of the cylinder and outer wall of the piston, and the pressure difference between upper and lower chamber of the cylinder is measured. A numerical prediction of ER fluid flow in the damper model system is performed in order to study the ER fluid flow characteristics. Visualization experiment isalso made and used to qualitatively verify the numerical formulation. Findings -The agreement between the numerical predictions and experimental results is encouraging, and the ER fluid flow patterns under different piston aspect ratios, movement speeds and applied electric field strengths are presented. The results show that the piston aspect ratio has much smaller influence on the ER flow pattern than other influencing factors. Increasing piston movement speed or reducing the electric field applied is helpful to reduce the pressure response time period, which is an important indicator showing sensitiveness of the damper. It is also seen that the pressure difference between the upper and lower chamber of the cylinder increases with the electric field strength and the piston movement speed. Originality/value -First time the detailed investigation into the hydrodynamics behavior in such working models of neering applications for ER fluid.
Pressure measurement (, liquids), , Finite volume methods, Rheology, Flow, Hydrodynamics
-
59浏览
-
0点赞
-
0收藏
-
0分享
-
398下载
-
0评论
-
引用
张信荣, Hiroshi Yamaguchia, Xin-Rong Zhangb, a, *
internationaljournal of refrigeration 32(2009)1683-1693,-0001,():
-1年11月30日
In this report, a new CO2 refrigeration system is introduced, which can achieve a refrigeration capability below the CO2 triple point of -56.6 C. The proposed CO2 refrigeration system consists of two thermodynamic cycles arranged in cascade, where one is a CO2 trans-critical cycle and another is a trans-triple-point cycle. An experimental set-up is constructed and tested in order to obtain a basic knowledge about this CO2 system. Based on the measured data, it is concluded that the built CO2 refrigeration system can operate continuously and stably, although dry ice particles exist in the closed CO2 loops. An average COP (a ratio of cooling energy to the compressor power consumption) is measured at 2.45 in the present experiment range for the low-pressure system of the experimental set-up. In addition, the influence of the condensation temperature on the refrigeration cycle is investigated and more studies are needed for the future optimization work.
Refrigeration system Compression system Cascade system Carbon dioxide Transcritical cycle Triple point Design Experiment Pressure Temperature
-
47浏览
-
0点赞
-
0收藏
-
0分享
-
1479下载
-
0评论
-
引用
【期刊论文】Flow Pattern Variations of Viscoelastic Fluid Flows in Three-Dimensional Branching Channel
张信荣, Hiroshi Yamaguchi, Xin-Rong Zhang, Tomoko Matsumoto
POLYMER ENGINEERING AND SCIENCE-2010,-0001,():
-1年11月30日
Transport phenomena in three-dimensional branching channel are important because of their relevance in polymer processing. In this article, an experimental study on viscoelastic flow in a three-dimensional cylindrical branching channel is carried out to investigate variations of flow pattern. Flow visualization in representative symmetric planes is made both for the viscoelastic fluid and Newtonian flow. From the results of the present investigation, the flow field in the threedimensional cylindrical branching channel is clarified within the range of laminar flow. It is confirmed that corner vortex, shedding vortex, and secondary vortex flow are all obviously changed with the fluid concentration and the Reynolds number, which are much more three-dimensional and complex than the Newtonian fluid, and the flow pattern of the viscoelastic fliud flow largely depends on the Reynolds number and fluid concentration. Even for the viscoelastic flow at the low Reynolds number, shedding vortex and secondary vortex and complex three-dimensional flow occur in the cylinder. The flow field is not symmetric space for the viscoelastic flow and however is fairly symmetric for the Newtonian fluid. The above reasons explain why the flow deflection happens even at the low Reynolds number flow. POLYM. ENG. SCI. , 50:32–42, 2010. a2009 Society of Plastics Engineers
-
50浏览
-
0点赞
-
0收藏
-
0分享
-
104下载
-
0评论
-
引用
张信荣, Hiroshi Yamaguchi a, Xin-Rong Zhang b, a, n, Xiao-Dong Niu a, Keisuke Yoshikawa a
Journal ofMagnetismandMagneticMaterials322(2010)698-704,-0001,():
-1年11月30日
Experiment and numerical study were conducted to investigate the heat transfer characteristics of a thermo-sensitive magnetic fluid (TSMF) filled in a cubic container with a heat generating square cylinder stick inside and under a uniform magnetic field. The experimental results show that, regardless of the heat generating object sizes, the heat transfer characteristic of the TSMF is enhanced when the magnetic field is applied to the TSMF. However, the heat transfer of the TSMF becomes poor as the size of the inside heat generating object increases because the space where the fluids go through becomes narrower and the flow is obstructed when the heat generating object size becomes bigger. Numerical simulation based on the Lattice Boltzmann method confirmed the experimental findings, and disclosed more flow details of the natural convection of the TSMF inside cavity.
Nature convection Magnetic fluid
-
37浏览
-
0点赞
-
0收藏
-
0分享
-
363下载
-
0评论
-
引用
【期刊论文】Experimentalandnumericalinvestigationofnaturalconvectionofmagnetic fluids inacubiccavity
张信荣, Hiroshi Yamaguchi a, Xiao-Dong Niu a, *, Xin-Rong Zhang b, Keisuke Yoshikawa a
Journal ofMagnetismandMagneticMaterials321(2009)3665-3670,-0001,():
-1年11月30日
In this article, natural convections of a magnetic fluid in a cubic cavity under a uniform magnetic field are investigated experimentally and numerically. Results obtained from experiments and numerical simulations reveal that the magnetic field and magnetization are influenced by temperature. There exist relative larger magnetization and magnetic forces in the regions near the upper wall and center inside the cavity than in the region near the bottom and side walls. A weak flow roll occurs inside cavity under the magnetic force, and it brings the low temperature fluid downward in the center region, and streams the high temperature fluid upward along the regions near the sidewalls. With the magnetic field imposed, the heat transfer inside the cavity is enhanced significantly compared to that without the magnetic field, and increasing the strength of the magnetic field the heat transfer is increased further.
Magnetic fluid Naturalconvection Lattice Boltzmannmethod
-
49浏览
-
0点赞
-
0收藏
-
0分享
-
218下载
-
0评论
-
引用
【期刊论文】Hydrogen production from solar energy powered supercritical cycle using carbon dioxide
张信荣, Xin-Rong Zhang a, *, Hiroshi Yamaguchi b, Yuhui Cao a
internationaljournal of hydrogen energy 35(2010)4925-4932,-0001,():
-1年11月30日
A hydrogen production method is proposed, which utilizes solar energy powered thermodynamic cycle using supercritical carbon dioxide (CO2) as working fluid for the combined production of hydrogen and thermal energy. The proposed system consists of evacuated solar collectors, power generating turbine, water electrolysis, heat recovery system, and feed pump. In the present study, an experimental prototype has been designed and constructed. The performance of the cycle is tested experimentally under different weather conditions. CO2 is efficiently converted into supercritical state in the collector, the CO2 temperature reaches about 190℃ in summer days, and even in winter days it can reach about 80℃. Such a high-temperature realizes the combined production of electricity and thermal energy. Different from the electrochemical hydrogen production via solar battery-based water splitting on hand, which requires the use of solar batteries with high energy requirements, the generated electricity in the supercritical cycle can be directly used to produce hydrogen gas from water. The amount of hydrogen gas produced by using the electricity generated in the supercritical cycle is about 1035 g per day using an evacuated solar collector of 100.0m2 for per family house in summer conditions, and it is about 568.0g even in winter days. Additionally, the estimated heat recovery efficiency is about 0.62. Such a high efficiency is sufficient to illustrate the cycle performance.
Hydrogen Supercritical carbon dioxide Solar energy Water splitting Heat transfer
-
38浏览
-
0点赞
-
0收藏
-
0分享
-
98下载
-
0评论
-
引用
【期刊论文】An experimental study on evacuated tube solar collector using supercritical CO2
张信荣, X. R. Zhang a, b, *, H. Yamaguchi a
Applied Thermal Engineering 28(2008)1225-1233,-0001,():
-1年11月30日
A solar collector using supercritical CO2 as working fluid is proposed in this paper. In order to investigate and estimate the CO2-based solar collector, an experimental set-up was constructed. Of particular interest of this paper are the basic collector characteristics, such as CO2 temperature and pressure in the collector, CO2 flow rate, and collector performances. The collector has been tested under various weather conditions. The results show that the CO2 temperature, CO2 pressure and mass flow rate increase with the solar radiation, which is different from those of traditional solar collector using liquid as working fluid. The solar radiation has influence on the CO2 states, being liquid, liquid-gas or supercritical state in the test, furthermore, affects the CO2 mass flow rate. The annually-averaged collector efficiency is found to be above 60. 0% in the case of supercritical CO2 as working fluid, which is much higher than that of water-based solar collector. This study shows the potential of the supercritical CO2-based solar collector in the field of solar thermal utilization.
Solar collector, Supercritical CO2, Solar energy, Solar thermal utilization
-
77浏览
-
0点赞
-
0收藏
-
0分享
-
105下载
-
0评论
-
引用
【期刊论文】Basic study on new cryogenic refrigeration using CO2 solid–gas two phase flow
张信荣, Hiroshi Yamaguchia, Xin-Rong Zhangb, a, *, Katsumi Fujimac
internationaljournal of refrigeration 31(2008)404-410,-0001,():
-1年11月30日
In this paper, a cryogenic refrigeration method is described, which utilizes CO2 solid-gas two phase flow and the dry ice. The CO2 solid-gas two phase flow is achieved by expanding liquid CO2 and thus refrigeration process less than CO2 triple point -56.6℃ can be available. The experimental work is divided into two parts and two experimental set-ups were designed, constructed and tested. The interest of the first experiment test is the feasibility of expanding liquid CO2 into CO2 solid–gas flow in a horizontal circular tube by expansion valve. The second experiment focuses on the feasibility of the refrigeration of liquid CO2 expanding into solid-gas two phase flows used in a prototype CO2 heat pump system. The results show that solid-gas two phase flows can be achieved by expanding liquid CO2 by expansion valve in a closed CO2 heat pump system loop and low temperature refrigeration below -56.6℃ is achieved in the experiments, which give greater possibility to create a cryogenic refrigeration process below -56.6℃ for food industries, bio-medical engineering, etc.
Research Refrigeration system Carbon dioxide Sublimation Triple point Dryice Two-phase flow Experiment
-
81浏览
-
0点赞
-
0收藏
-
0分享
-
85下载
-
0评论
-
引用
【期刊论文】Study on power generation using electro-conductive polymer and its mixture with magnetic fluid
张信荣, Hiroshi Yamaguchia, Xin-Rong Zhangb, a, Shidei Higashia, Mingjun Lia
Journal of Magnetism and Magnetic Materials 320(2008)1406-1411,-0001,():
-1年11月30日
A new power generation system using electro-conductive polymer and its mixture with magnetic fluid is introduced. The system using non-poison electro-conductive polymer and its mixture with magnetic fluid and operating at room temperature is proposed in the present paper. The system could be used as a micro-distributed energy supply system for domestic use in the future. An experimental set-up is designed and established to investigate the performance of the power generation with an aid of a theoretical analysis of the power generation. It is found that the theoretical results are in good agreement with the measured data. Based on the obtained results, the electric output increases with Reynolds number, size of the test channel, magnetic strength and electric conductivity. It is understood that in order to obtain a practical power generation, priority should be put on increasing fluid flow velocity and magnetic field strength.
Electro-conductive polymer, Magnetic fluid, MHD power generation, MHD device, Non-Newtonian fluid flow
-
41浏览
-
0点赞
-
0收藏
-
0分享
-
215下载
-
0评论
-
引用
【期刊论文】Experimental study on the performance of solar Rankine system using supercritical CO2
张信荣, Xin-Rong Zhanga, b, Hiroshi Yamaguchia, Daisuke Unenoa
Renewable Energy 32(2007)2617-2628,-0001,():
-1年11月30日
An experimental study is carried out to investigate the performance of a solar Rankine system using supercritical CO2 as a working fluid. The testing machine of the solar Rankine system consists of an evacuated solar collector, a pressure relief valve, heat exchangers and CO2 feed pump, etc. The solar energy powered system can provide electricity output as well as heat supply/refrigeration, etc. The system performance is evaluated based on daily, monthly and yearly experiment data. The results obtained show that heat collection efficiency for the CO2-based solar collector is measured at 65.0-70.0%. The power generation efficiency is found at 8.78-9.45%, which is higher than the value 8.20% of a solar cell. The result presents a potential future for the solar powered CO2 Rankine system to be used as distributed energy supply system for buildings or others.
Solar energy, Supercritical CO2, Rankine cycle, Distributed energy supply system
-
49浏览
-
0点赞
-
0收藏
-
0分享
-
153下载
-
0评论
-
引用