predictions of heat transfer coefficient
Experimental investigation and comparison of heat transfer coefficient of a two phase closed thermosyphon
Ngày tải lên :
09/09/2015, 10:32
... with correlations of Rohsenow [2] and Imura [3] Figure shows the experimental data of Noie [10] for heat transfer coefficient of evaporator Figure Heat transfer coefficient of evaporator versus ... experimental results of previous works The condensation and evaporation heat transfer coefficient increases as filling ratio increases Maximum of the heat transfer coefficient of condenser is at ... Figure shows their experimental data for heat transfer coefficient Figure shows the heat transfer coefficient in evaporator versus heat flux for correlations of Rohsenow [2], Eq(8) for C F14 , C...
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An experimental investigation of heat transfer and fluid flow in a rectangular duct with inclined discrete ribs
Ngày tải lên :
05/09/2013, 16:10
... Journal of Heat Mass Transfer 2003; 30(2): 241-250 [17] Bhagoria J.L and Sahu M.M Augmentation of heat transfer coefficient by using 900 broken transverse ribs on absorber plate of solar air heater, ... Investigation of heat transfer and friction for ribroughened surfaces, Int Journal of Heat & Mass Transfer 1978; 21: 1143-1156 [4] Webb R.L., Eckert E.R.G and Goldstein R J Heat transfer and friction ... Journal of Heat and Mass Transfer1 999; 42: 1597-1615 [16] Karwa R, Experimental studies of augmented heat transfer and friction in asymmetrically heated rectangular ducts with ribs on the heated...
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Ptinciples of heat transfer
Ngày tải lên :
08/04/2014, 11:00
... convection heat transfer Kc as Kc = hc A TABLE 1.4 (W/K) (1.13) Order of magnitude of convection heat transfer coefficients hc Convection Heat Transfer Coefficient Fluid Air, free convection Superheated ... J/kg Btu/lbm hc local convection heat transfer coefficient W/m2 K Btu/h ft2°F q h combined heat transfer coefficient q = qc + qr; hb, heat transfer coefficient h h h of a boiling liquid, defined ... partial pressure of component A N/m2 psi, lbf/ft2, or atm P wetted perimeter m ft q rate of heat flow; qk, rate of heat flow by conduction; qr, rate of heat flow by radiation; qc, rate of heat flow...
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molecular dynamics simulation of heat transfer and phase change during
Ngày tải lên :
06/05/2014, 08:55
... the surface of the target by scaling velocities of atoms in cells on the top surface, and the same amount of heat flux is dissipated from the bottom of the target by scaling velocities of atoms ... the distribution of number density of atoms in space at different times, which demonstrates the variation of solid structure during laser heating At the early stage of laser heating, the crystal ... laser heating, the heat transfer process predicted using the continuum approach agrees with the result of the MD simulation Second, when melting happens, a transition region of about nm, instead of...
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molecular dynamics simulation of heat transfer and phase change during
Ngày tải lên :
06/05/2014, 08:57
... the surface of the target by scaling velocities of atoms in cells on the top surface, and the same amount of heat flux is dissipated from the bottom of the target by scaling velocities of atoms ... the distribution of number density of atoms in space at different times, which demonstrates the variation of solid structure during laser heating At the early stage of laser heating, the crystal ... laser heating, the heat transfer process predicted using the continuum approach agrees with the result of the MD simulation Second, when melting happens, a transition region of about nm, instead of...
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molecular dynamics simulation of heat transfer and phase change during
Ngày tải lên :
06/05/2014, 08:59
... the surface of the target by scaling velocities of atoms in cells on the top surface, and the same amount of heat flux is dissipated from the bottom of the target by scaling velocities of atoms ... the distribution of number density of atoms in space at different times, which demonstrates the variation of solid structure during laser heating At the early stage of laser heating, the crystal ... laser heating, the heat transfer process predicted using the continuum approach agrees with the result of the MD simulation Second, when melting happens, a transition region of about nm, instead of...
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Effect of heat transfer law on the finite time exergoeconomic performance of a generalized irreversible carnot heat engine
Ngày tải lên :
09/09/2015, 10:32
... overall heat- transfer coefficients of high- and low-temperature side heatexchangers, F1 and F2 are the surface areas of high- and low-temperature side heat- exchangers The total heat transfer ... the heat- transfer law obeys q ∝ ∆ (T n ) , the rate of heat leakage can be expressed as n q = C i (TH − TLn ) (4) where Ci is the heat leakage coefficient When analyzing actual heat engines, heat ... Carnot heat engine of the same heat input, the generalized irreversible Carnot engine can deliver less power and release more heat to the heat sink Hence, the rate of heat flow ( QLC ) to the heat...
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Numerical simulations of heat transfer of hot wire anemometer
Ngày tải lên :
16/09/2015, 17:14
... investigation of the laminar flow and heat transfer around a single circular cylinder was performed In the first part of this dissertation, a summary of results of numerical investigations of the two-dimensional ... without the presence of the wall; they attributed this phenomena to the distortion of velocity field by the wall and consequent alteration of the heat transfer characteristics of the hot wire such ... electrically heated sensing probe The variation of heat loss from the thermal element can be interpreted as a measure of the fluid velocity changes There are two fundamentally different types of thermal...
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Numerical simulation of heat transfer characteristics under semi confined impinging slot jets
Ngày tải lên :
17/09/2015, 17:19
... 8.2.2 Effect of the conduction heat transfer 8.2.3 Effects of wall factors 8.2.3.1 Effect of wall material 8.2.3.2 Effect of reflection coefficient on heat transfer 8.2.3.3 Effect of impingement ... correlation of Nu and Numax; Effect of θ on upstream shift of the point of Numax Photos of flow field; Nux; Nu0; correlation of Nu0 and Nuave Effect of throughflow on impingement heat transfer Effects of ... diameter on heat transfer for L/W=5 142 Figure 8.13: Effect of particle diameter on heat transfer for L/W=7 142 Figure 8.14: Effect of particle materials on heat transfer 144 Figure 8.15: Effect of inlet...
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MÔ HìNH HOá QUá TRìNH TRAO ĐổI NHIệT ẩM TRONG MáY ấP TRứNG GIA CầM Modeling of heat and mass transfer in chicken egg incubators
Ngày tải lên :
28/08/2013, 08:31
... Modeling Simultaneous Heat and Mass Transfer in Isotropic Sphere, Trans ASEA, pp 31 Husain A., Chen C.S., Clayton J T, Whitney L.F (1972), Mathematical Simulation of Mass and Heat Transfer in High ... Chen C.S., Clayton J T (1973), Simultaneuos Heat and Mass Diffusion in Biological Material, Trans ASAE, pp 69-73 Luikov, A V (1980), Heat and mass transfer, Mir Publisher, Moscow Peebles E D, ... D McDaniel (2004), A Practical Manual for Understanding the Shell Structure of Broiler Hatching Eggs and Measurement of their Quality, Mississipi State University, p 3-5 ...
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Effect of periodic suction on three dimensional flow and heat transfer past a vertical porous plate embedded in a porous medium
Ngày tải lên :
05/09/2013, 14:58
... -6.4648 4.4 Rate of heat transfer The rate of heat transfer at the wall i.e the heat flux in terms of Nusselt number Nu for different values of α and Kp are entered in Table The heat flux at the ... z-components of skin friction at the wall become τ x = m − B1 ( A1 B − A2 B − B − m )cos πz , (50) τz = − εα A1 A2 sin π z π 3.2 Rate of heat transfer The rate of heat transfer i.e heat flux at ... the following results of physical interest on the velocity and temperature of the flow field and also on skin friction and the rate of heat transfer at the wall The effect of growing permeability...
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Cooling load optimization of an irreversible refrigerator with combined heat transfer
Ngày tải lên :
05/09/2013, 15:28
... generalized heat transfer law including generalized convective heat transfer law and generalized radiative heat transfer law has been derived [11] The heating load and coefficient of performance of a ... convection heat transfer coefficient between the working fluid and the reservoir, σ is Stefan-Boltzmann coefficient, ε is the emittance coefficient of the heat source, α is the absorption coefficient of ... is the convection heat transfer coefficient between the working fluid and the reservoir, and t is the time of releasing heat process The radiation heat transfer coefficient of the hot side is...
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Ecological performance of a generalized irreversible Carnot heat engine with complex heat transfer law
Ngày tải lên :
05/09/2013, 15:28
... overall heat transfer coefficient and F1 is the heat- transfer surface area of the hightemperature-side heat exchanger , β is the overall heat transfer coefficient and F2 is the heat- transfer ... deriving force of TH − THC , QLC is the rate of heat flow from working fluid to the heat sink due to the deriving force of TLC − TL , QH is rate of heat transfer supplied by the heat source, and ... THC > TLC > TL The heat- transfer surface areas ( F1 and F2 ) of high- and lowtemperature heat exchangers are finite The total heat transfer surface area ( F ) of the two heat exchangers is assumed...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 1 of 3
Ngày tải lên :
17/03/2014, 15:00
... types of latent heat The first is the latent heat of fusion This is the amount of heat added or removed to change phase between solid and liquid The second type of latent heat is the latent heat of ... square inch b Inches of water c Inches of mercury d Millimeters of mercury e Microns of mercury 1.8 DEFINE the following: a Heat b Latent heat c Sensible heat d Unit used to measure heat HT-01 Page ... simply as the heat transferred per unit mass q Q m (1-16) where: q = heat transferred per unit mass (Btu/lbm) Q = heat transferred (Btu) m = mass (lbm) Example: Determine the heat transferred per...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 2 of 3
Ngày tải lên :
17/03/2014, 15:00
... convective heat transfer coefficient are Btu/hr - ft2 - oF Overall Heat Transfer Coefficient In the case of combined heat transfer, it is common practice to relate the total rate of heat ˙ transfer ... the heat is being transferred Convection involves the transfer of heat by the mixing and motion of macroscopic portions of a fluid Radiation, or radiant heat transfer, involves the transfer of heat ... physically connected to the heat transfer site Rev Page HT-02 CONDUCTION HEAT TRANSFER Heat Transfer CONDUCTION HEAT TRANSFER Conduction heat transfer is the transfer of thermal energy by interactions...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 3 of 3
Ngày tải lên :
17/03/2014, 15:00
... Volume of Module - Heat Transfer This module describes conduction, convection, and radiation heat transfer The module also explains how specific parameters can affect the rate of heat transfer ... involving the transfer of heat Frequently, when it is desired to remove heat from the point at which it is generated, some type of fluid is involved in the heat transfer process Examples of this are ... Rev HT Department of Energy Fundamentals Handbook THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW, Module Fluid Flow blank Fluid Flow TABLE OF CONTENTS TABLE OF CONTENTS LIST OF FIGURES ...
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convective heat transfer mathematical and computational modelling of viscous fluids and porous media
Ngày tải lên :
01/04/2014, 10:51
... effects are of a smaller order of magnitude than are the effects described by the Fourier or Fick laws and are often neglected in heat and mass transfer processes The convective mode of heat transfer ... flow Ever since the publication of the first text book on heat transfer by GrSber (1921), the discussion of buoyancy-induced heat transfer follows directly that of forced convection flow This ... radius of cylinder or sphere, or major axis of elliptical cylinder, or body curvature, or amplitude of surface wave radius of core region reactant transversal heat dispersion constant amplitude of...
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handbook of numerical heat transfer
Ngày tải lên :
02/04/2014, 15:24
... Handbook of Numerical Heat Transfer, Second Edition Edited by W J Minkowycz, E M Sparrow and J Y Murthy Copyright © 2006 John Wiley & Sons, Inc Handbook of Numerical Heat Transfer, Second...
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fundamentals of heat and mas transfer seventh edition
Ngày tải lên :
02/04/2014, 15:51
... the relationship between heat transfer and the second law of thermodynamics as well as the efficiency of heat engines Indeed, the influence of heat transfer on the efficiency of energy conversion is ... First Law of Thermodynamics (Conservation of Energy) 13 1.3.2 Relationship to the Second Law of Thermodynamics and the Efficiency of Heat Engines 31 Units and Dimensions Analysis of Heat Transfer ... pressure, N/m2 energy transfer, J heat transfer rate, W rate of energy generation per unit volume, W/m3 heat transfer rate per unit length, W/m heat flux, W/m2 dimensionless conduction heat rate cylinder...
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fundamentals of heat and mass transfer
Ngày tải lên :
02/04/2014, 15:51
... the relationship between heat transfer and the second law of thermodynamics as well as the efficiency of heat engines Indeed, the influence of heat transfer on the efficiency of energy conversion is ... First Law of Thermodynamics (Conservation of Energy) 13 1.3.2 Relationship to the Second Law of Thermodynamics and the Efficiency of Heat Engines 31 Units and Dimensions Analysis of Heat Transfer ... pressure, N/m2 energy transfer, J heat transfer rate, W rate of energy generation per unit volume, W/m3 heat transfer rate per unit length, W/m heat flux, W/m2 dimensionless conduction heat rate cylinder...
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