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Simulation Optimization and Experiment of R1234-ze on the Heat Pump Water Heater Storage Tank Yan Qua*, Fang Wangb, Yu Wangc, Peng Wangd, Tang Lie and Zhao-feng Mengf University of Shanghai for Science and Technology, Shanghai 200093, China aquyan0911020105@163.com, bwang1996930@163.com, c34590320@qq.com, d 704058420@qq.com, e578488783@qq.com, f710498757@qq.com *Corresponding author Keywords: R1234ze, Heat pump water heater storage tanks, Simulation, Temperature test.
The two different condensing coil water structure of simplified schematic diagram Calculated by CFD and Analysis of the Result Influence of condensing coil position in the vertical direction of the tank temperature and velocity field , is to make sure the condensing coil total heat transfer area , and to keep other structural parameters remain unchanged , changing the condensing coil and tank the relative position of the condensation coils were placed on top , middle and bottom three locations.
Respectively, of equal diameter and variable diameter condenser coils at the top, middle and bottom three position, the tank temperature field and velocity field in fluent simulation.
Conclusion With fluent software simulations in this paper, the condensing coils at different locations within the water heater hot water storage tank static heating process calculation of temperature field and flow field in analogue, unequal diameter are discussed further in condensing coil structure, by comparing simulation results revealed that the structure can achieve the uniform heating of the inside of the water, and can significantly improve the temperature.
Comparison between models for the simulation of hot water storage tanks [J].

The simulation was performed on the node arrangement with 32860 nodes.
The numerical calculations based on the FVM, were performed with the CFD package Fluent (version 13), and compared with the results obtained by the LRBFCM meshless method.
A reasonable agreement was demonstrated which helps us achieving reliable simulations of the realistic CC situations [8].
Šarler, Simulation of natural convection influenced by magnetic field with explicit local radial basis function collocation method.
Vušanović, Application of continuous casting simulation at Štore Steel – II.

Numerical Study of the Influence of Insect Grille on Airflow in Ventilated Facade Constructions Erik Šagát1,a* and Libor Matějka1,b 1Brno University of Technology, Faculty of Civil Engineering, Institute of Building Structures, Veveří 331/95, 602 00 Brno, Czech republic asagat.e@fce.vutbr.cz, bmatejka.l@fce.vutbr.cz Keywords: Ventilated façade, convection CFD simulation, insect grille, CFX Abstract.
Research and development of ventilated facade is currently focused on the different simulation approaches [1], [2], energy benefits [3], [4], numerical assessment of different construction types [5], use of various cladding materials like PCM [6], use of energy active façade elements like photovoltaic panels or solar thermal collectors [7], [8].
Moreno, Modeling of ventilated façades for energy building simulation software, Energy and Buildings, Vol. 65, 2013, pp. 419-428

The CFD method has the advantages of low cost, fast speed, complete data and simulated various conditions.
This paper takes this method to calculate the numerical simulation of plant airflow, to study the basic law of air flow under certain conditions, and to select a reasonable scheme of air supply. 2 Simulation conditions 2.1 Physical model The hull painting plant is located in the north of China.
The K-ε equation model is adopted for the numerical simulation.
During numerical simulation, the wall is adiabatic.
Therefore, the future simulation is supposed to add air dynamic characteristics during the process of calculation by cooperation with the manufacturers to improve the simulation accuracy Reference: [1] Li ming,Li minggao,et al.

The simulation result shows that the particle volumetric concentration distribution of different diameter particles is nonuniform in a hydrocyclone.
Now the mixture two-phase model[1][2][3]and dispersed phase model [4][5][6][7] has been used widely in the numerical simulation of a hydrocyclone and the relevant ideal simulation results are obtained, but the two models are confined to the low concentration and 2D situation.
Numerical simulation The geometrical parameters of hydrocyclone are shown in Table 1.
Numerical simulation of gas-liquid-solid flows in a hydrocyclone separator.Arch Appl Mech,2009,79,p395-400
CFD modelling of hydrocyclone prediction of cut size.Int.

The thermal performance of ventilated double skin facade had been investigated by experimental studies and numerical modeling simulations in recent years.
The models that have been used to predict the performance of DSF reviewed by Gracia et al.[4] included: a) Lumped model for naturally ventilated DSF[11-13]; b) Non-dimensional analysis for describing the energy performance of DSF [14, 15]; c) The airflow network model for naturally ventilate DSF in commercial building; d) Control-volume approach using one dimensional vertical air flow[16]; e) CFD approach for air channel velocity and temperature distribution simulation [14, 17]; f) Zonal approach, using larger control volume to calculate, the algebra equation is simpler than CFD approach [18].
Simulation of Velocity and Temperature Distribution in DSF Channel.
Xu et al.’s [17] simulation result of naturally ventilated DSF also showed that, at the same boundary conditions, with the channel with decreasing, the air velocity increases as the channel width decreases, thus strength the heat transfer and preheat fresh air in winter.
Zhou, CFD simulation on steady heat transfer of a mechanical ventilation double facade curtain wall, in: Conference of China Building Environment and Building Energy Saving (In Chinese), 2007, p. 292

NUMERICAL SIMULATION AND ANALYSIS OF 3D FLOW FIELD IN NEW DIFFERENT-SPEED MIXER Zhang Yalan1,a ,Wu Yun2,b 1Department of Computer Engineering, Guangxi University of Technology, Liuzhou 545006, China 2Applied English 093, Guangxi Yulin Normal University, Yulin 537000, China a436068934@qq.com, b356556631@qq.com Keywords: different-speed mixer; analysis of flow field; numerical simulation Abstract.
A simulation model of the flow field in the different-speed mixer was built based on UG software in this paper.
(2)The true flow condition of the material in flow field was obtained by numerical simulation of agitator flow field which done by Fluent analysis software.
Study Some Problems of Numerical Simulation Method [D].
Computational Fluid Dynamics Analysis--Principle and Application of CFD software [M].

Numerical simulation is done in the reactor and its connecting flue in BMCR working condition by using the standard k-ε turbulence model.
In the process of numerical simulation: adiabatic system; regardless of the air leakage, ash and the chemical reaction; steady flow[3].
This numerical simulation of SCR system has a practical significance to the 330MW coal-fired power plant. 2) Numerical simulation is a useful method for designing and adjustment.
Simulation Optimization on Flow Field of SCR Denitrification Reactors[J].Journal of Chinese Society of Power Engineering, 2010, 30(3): 224-229 [2] W.
The analysis of computational fluid dynamics—principle and application of CFD software[M].Beijing: The Press Of Qinghua, 2004

Fig. 1 Schematic illustration of a computational domain for PEMFC simulation.
Numerical model In this study, CFD programs based on STAR-CD version 4.12, a commercial finite volume technique solver, and ES-PEMFC version 2.40, were used to solve the fully coupled governing equations.
Fig.1 illustrates the computational domain for CFD-based PEMFC simulation which consists of two bipolar plates, the anode and the cathode gas channels, the anode and the cathode gas diffusion layers (GDLs), and MEA on active area of 25 cm2.
Numerical simulations were performed to compare the performance-related parameters of PEMFC for the SFFSB with those for the CASFF, focusing on pressure drop, discharge of condensed water, uniformity of current density over the entire surface area, and maximization of power density.

Anlin Wang et al[4] proposed Multidisciplinary Optimization of a hydraulic slide valve and the response surface function of transient hydrodynamic force acquired, but they use the method based on CFD analysis.
Simulation Model and Boundary Conditions According to the parameters of high-flow control valve, the nominal diameter, total length and stroke are 7.874in, 27.5591in and 3.1496in respectively.
References [1] FENG Weimin, HAN Ning, “Numerical simulation of optimum design of large diameter cyclic type regulating valve,” Engineering Journal of Wuhan University,Vol 39(1).p.76-79,(2006).
(In Chinese) [2] Han Xu, Zheng Ming Guang, “Hydrodynamic characterization and optimization of Contra-push check valve by numerical simulation,” Annals of Nuclear Energy, Vol 38, Issue 6, p. 1427-1437,(2011).
[4] WANG An-lin, WU Xiao-feng, ZHOUCheng-lin, “Multidisciplinary Optimization of a Hydraulic Slide Valve Based on CFD,”JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY, Vol44(12), p.1767-1772, (2010).