Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
|
|
There are 26 papers published in subject: > since this site started. |
Select Subject |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
1. Robust Stability of Multi-Objective Economic Model Predictive Control for Uncertain Nonlinear Systems | |||
ZHAO Hui-Rong, Shen Jiong, LI Yi-Guo | |||
Dynamic and Electronic Engineering 01 May 2017 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Review: The utopia-tracking (UT)strategy is efficient for multi-objective model predictive control(MOMPC) concerning economic criteria. However,the feasibility region of the UT strategy is relatively small due to the relatively tight terminal equation constriant, and also there is a lack of robust stability studies in this field. Based on the UT strategy, a new multi-objective economic model predictive control (MOEMPC) scheme with a new termianl constraint, which can deal with multiple changing economic criteria, was proposed in this paper. Robust stability of the proposed MOEMPC scheme under bounded uncertainties is guaranteed based on the Input-to-State Stability (ISS) theory. Finally, a simple CSTR case example shows that the proposed MOEMPC enlarges the feasibility region of UT-MPC. | |||
TO cite this article:ZHAO Hui-Rong, Shen Jiong, LI Yi-Guo. Robust Stability of Multi-Objective Economic Model Predictive Control for Uncertain Nonlinear Systems [OL].[ 1 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4727841 |
2. Mixed Convection Characteristic inside a Thermal Cycling Chamber with Nonuniform Perforated Plate | |||
Huang Yiye,Yang Guang,Wu Jingyi | |||
Dynamic and Electronic Engineering 27 May 2016 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The steady-state flow field and temperature distribution inside a thermal cycling test chamber with nonuniform perforated plate are investigated both numerically and experimentally. Porous zones are set up by pressure loss analogy to simplify the perforated plate. Boussinesq approximation and low-Re model are used in the simulation. The numerical result shows both forced convection and natural convection contribute to the fluid flow and heat transfer. For uniform perforated plate, the temperature at the given height always increases from the center line to the walls. And from top to bottom of the cycling chamber, temperature increases around the center line while decreases near the walls. Based on that, two cases of nonuniform perforated plates with the same ratio of open area and different holes distribution are examined to improve the temperature uniformity in test chamber. The results show that both average temperature and standard temperature deviation are effected significantly by nonuniform perforated plate. The latter experiment is performed with the optimal perforated plate under the same condition of Re=4.1×10^4, Gr=1.8×10^11. The experiment results are obtained by Constant Temperature Anemometry and agree with the numerical simulation. | |||
TO cite this article:Huang Yiye,Yang Guang,Wu Jingyi. Mixed Convection Characteristic inside a Thermal Cycling Chamber with Nonuniform Perforated Plate[OL].[27 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4694217 |
3. EXPERIMENTAL STUDY ON LOCAL SUBCOOLED FLOW BOILING HEAT TRANSFER IN A VERTICAL MINI-GAP CHANNEL | |||
Li Junye,Feng Zhaozan,Li Wei,Zhou Kan | |||
Dynamic and Electronic Engineering 20 May 2016 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:An experimental study of subcooled flow boiling in a high-aspect-ratio, one-sided heating rectangular mini-gap channel was conducted using deionized water. The local heat transfer coefficient, onset of nucleate boiling, and flow pattern of subcooled boiling were investigated. The influence of heat flux and mass flux were studied with the aid of a high-speed camera. The results show that the flow pattern was mainly isolated bubbly flow when the narrow microchannel was placed vertically. The bubbles generated at lower mass fluxes were larger and did not easily depart, forming elongated bubbly flow and flowing upstream. The thin film evaporation mechanism dominated the entire test section due to the elongated bubbles and transient local dryout as well as rewet. The local heat transfer coefficient near the exit of the test section was larger | |||
TO cite this article:Li Junye,Feng Zhaozan,Li Wei, et al. EXPERIMENTAL STUDY ON LOCAL SUBCOOLED FLOW BOILING HEAT TRANSFER IN A VERTICAL MINI-GAP CHANNEL[OL].[20 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4691865 |
4. HEAT TRANSFER CHARACTERISTICS OF DOWNWARD SUPERCRITICAL KEROSENE FLOW IN MINITUBES | |||
Lin Jinpin,Zhang Jingzhi,Zhou Kan,Li Wei | |||
Dynamic and Electronic Engineering 20 May 2016 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The heat transfer characteristics of supercritical China RP-3 aviation kerosene flowing downward in a vertical circular tube are numerically investigated. A ten-species surrogate model is used to calculate the thermophysical properties of kerosene and the Re-Normalization Group (RNG) k-ε model with the enhanced wall treatment is adopted to simulate the turbulent flow. The effects of diameter, wall heat flux, and pressure on temperature and heat transfer coefficient are studied. The numerical results show three types of heat transfer deterioration exist along the flow direction. The first deterioration at the tube inlet region is caused by the development of the thermal boundary layer, which exist whatever the operation condition is. The second and third kind of deterioration take place when the inner wall temperature or the bulk fuel temperature approaches the pseudo-critical temperature under a pressure close to the critical value. The heat transfer coefficients increase with decreasing diameter and increasing pressure. The increase of inlet pressure can effectively eliminate the deteriorations because the thermophysical properties change less near the critical point at higher pressure. The decrease of wall heat flux will delay the onsets of the second and third kind of deterioration. The numerical heat transfer coefficient fit well with the empirical correlations | |||
TO cite this article:Lin Jinpin,Zhang Jingzhi,Zhou Kan, et al. HEAT TRANSFER CHARACTERISTICS OF DOWNWARD SUPERCRITICAL KEROSENE FLOW IN MINITUBES[OL].[20 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4691841 |
5. Heat transfer characteristics of supercritical aviation kerosene at different tube diameters | |||
Hong Xiaoqiang,Huang Dan,Zhou Kan,Li Wei | |||
Dynamic and Electronic Engineering 20 May 2016 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Supercritical fluids are widely used in aeronautic, astronautic and nuclear engineering. Active cooling is necessary for scramjet engines to survive the extreme heat generated in hypersonic flight. Regenerative cooling system, where engine fuel works as coolants and travels through the cooling tubes along the chamber wall, carrying away heat from the wall via heat convection and endothermic chemical reactions, is developed as an effective thermal management technique. In this paper, experimental results of convective heat transfer performances of aviation kerosene at supercritical pressures were presented. Stainless steel circular tubes having inner diameters of 1and 1.8 mm were investigated for pressures ranging from 3 to 4 MPa, mass flow rates from 1.87 to 2.41 g/s and heat fluxes from 285 to 365 kW/m2. It was found that the heat transfer coefficient increases with mass flow rate at the former part of the tube. However, as the Reynolds increases significantly at the latter part of the tube at relatively low mass flow rate, the heat transfer coefficient increases dramatically at the latter part of the tube at relatively low mass flow rate. The effect of heat flux on heat transfer is complicated, while the effect of pressure on heat transfer is insignificant. The experimental results also indicated that the heat transfer coefficient decreases with the reduction in tube diameter. The heat transfer behaviors in relation to changes in tube sizes might be caused by the buoyancy effect. | |||
TO cite this article:Hong Xiaoqiang,Huang Dan,Zhou Kan, et al. Heat transfer characteristics of supercritical aviation kerosene at different tube diameters[OL].[20 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4691946 |
6. Thermal analysis of a solar parabolic trough receiver tube with porous insert optimized by coupling genetic algorithm and CFD | |||
Zheng Zhang-Jing,He Ya-Ling,Xu Yang | |||
Dynamic and Electronic Engineering 11 May 2016 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:In this paper, the heat transfer enhancement in a solar parabolic trough receiver tube with porous insert and non-uniform heat flux condition was investigated. A new optimization method which couples genetic algorithm (GA) and computational fluid dynamics (CFD) based on Socket communication was proposed to optimize the configuration of porous insert. The transverse cross-section of flow region in the enhanced receiver tube (ERT) was divided into several small regions. The new optimization method was adopted to determine whether each small region should be filled with porous medium. After the acquisition of the optimal porous inserts, some performance evaluation criterions such as synergy angle, entransy dissipation and exergy loss were introduced to discuss the heat transfer performance of ERTs with optimal and referenced porous inserts. The results showed that, for a large range of properties of porous insert (including porosity and thermal conductivity) and Reynolds number, the heat-transfer performance of ERT with porous insert optimized by GA is always higher than that of the referenced ERTs. Better heat-transfer performance can further improve the solar-to-thermal energy conversion efficiency and mechanical property of the solar parabolic trough receiver. When some porous materials with high thermal conductivity are adopted, ERT can simultaneously obtain perfect thermal and thermo-hydraulic performance with using the same optimized porous insert, which cannot be achieved by using the referenced porous insert. In the view of those introduced evaluation criterions, using the optimized porous insert can obtain better synergy performance and lesser irreversibility of heat transfer than using the referenced porous insert. Entransy dissipation per unit energy transferred and exergy loss rate have equivalent effects on the evaluation of irreversibility of heat transfer process. These evaluation criterions can be used as optimization goals for enhancing the comprehensive performance of the solar parabolic trough receiver. | |||
TO cite this article:Zheng Zhang-Jing,He Ya-Ling,Xu Yang. Thermal analysis of a solar parabolic trough receiver tube with porous insert optimized by coupling genetic algorithm and CFD[OL].[11 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4687818 |
7. A Comparison Study of Hydrogen Bond in Poly(vinyl alcohol) aqueous solutions: DMSO, Ethanol, Ethylene Glycol and Glycerol | |||
CHEN Cong | |||
Dynamic and Electronic Engineering 30 November 2015 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:In this paper, molecular dynamics simulations have been performed on poly(vinyl alcohol)-cryoprotective agent solutions. Four cryoprotective agents (CPA) were selected: DMSO, ethanol, ethylene glycol and glycerol. Hydrogen bonds were analyzed based on a geometrical criterion. The results showed that the number of hydroxyl groups in CPA molecules had a great impact on hydrogen bonding structure of PVA-CPA aqueous solutions. | |||
TO cite this article:CHEN Cong. A Comparison Study of Hydrogen Bond in Poly(vinyl alcohol) aqueous solutions: DMSO, Ethanol, Ethylene Glycol and Glycerol[OL].[30 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4667041 |
8. A review of ice crystal growth characterization and its growth control by using additives | |||
ZHAO Jun,ZHAO Xiaozhi,AN Qingsong,GAO Liuhua | |||
Dynamic and Electronic Engineering 20 November 2015 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Ice slurry, as a very attractive coolant which can outperform many single-phase heat transfer fluid medium in energy storage denstiy due to latent heat from fusion of ice crystals has attracted great attention. However, the size increase and shape change of ice crystal when stored adiabatically, not only decreases the melting rates of ice slurries in heat exchange but also can result in pressure drop or even fatal clogging in pipes. This seriously hinders the widely practical use of ice slurries for transport of cold energy. Efforts must be put to inhibite the ice crystal growth. This paper reviews ice crystal growth characterization and its growth control by using additives. Additives include anti-freeze protein (AFP) and the substitute such as polyvinyl alcohol (PVA), silane coupling agents and surfactants. For AFP and PVOH, the mechanism of growth control is thermal hysteresis, while, for surfactants, the mechanism has not been reported. Function groups of additives that cause adsorption are summarized. And the issues that crying needs to be solved to expand the ice slurry utilization is given. The review will help people fully understand the research status of ice crystal growth. | |||
TO cite this article:ZHAO Jun,ZHAO Xiaozhi,AN Qingsong, et al. A review of ice crystal growth characterization and its growth control by using additives[OL].[20 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4663602 |
9. Manipulate Interface Thermal Conductance of Metal-Graphene-Substrate Using Graphene Thermal Stability | |||
ZHAO Weiwei,ZHANG Chunwei,YONG Guoqing,HUANG Peng,BI Kedong,CHEN Yunfei,NI Zhenhua | |||
Dynamic and Electronic Engineering 05 January 2013 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Graphene defects have played an important role in graphene's electrical, optical and thermal properties. In this work, we measured the interface thermal conductance of Al/graphene with different defect situations/silica using transient thermoreflectance technique. We use the graphene thermal stability of being annealed in different temperatures to manipulate the graphene defects. The transient thermoreflectance technique measurement results suggest that as graphene defects increase, the interface thermal conductance increases as well. The cause of the interface thermal conductance increase might be the graphene disintegration which starts from graphene imperfection rings and the oxygen doping which will enhance the metal-graphene bonding energy. | |||
TO cite this article:ZHAO Weiwei,ZHANG Chunwei,YONG Guoqing, et al. Manipulate Interface Thermal Conductance of Metal-Graphene-Substrate Using Graphene Thermal Stability[OL].[ 5 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4512357 |
10. DISTRIBUTION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND FURANS IN THE ATOMSPHERE OF WORKPLACE OF TWO HAZARDOUS WASTE INCINERATORS | |||
Chen Tong ,Jian-hua Yan,Xiao-dong Li,Sheng-yong Lu,Yu-qi Jin,Fei Wang,Ke-fa Cen | |||
Dynamic and Electronic Engineering 17 February 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Hazardous waste incinerator is one of the sources of airborne emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs).In this survey,the PCDD/Fs distribution in the atmosphere of two workplace of hazardous waste incinerators was studied.The concentration of PCDD/Fs is 819.5 and 15.3 pg m-3 respectively in site 1and site 2.The results indicated that the PCDD/Fs in the air of workplace were correlated with the PCDD/Fs emission from the incinerator. | |||
TO cite this article:Chen Tong ,Jian-hua Yan,Xiao-dong Li, et al. DISTRIBUTION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND FURANS IN THE ATOMSPHERE OF WORKPLACE OF TWO HAZARDOUS WASTE INCINERATORS[OL].[17 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4466953 |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
|
About Sciencepaper Online | Privacy Policy | Terms & Conditions | Contact Us
© 2003-2012 Sciencepaper Online. unless otherwise stated