international journal of heat and mass transfer impact factor 2013

... 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, ... Christopher 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 ...

Ngày tải lên: 28/08/2013, 08:31

... Rt,f mass, kg rate of transfer of mass for species, i, kg/s rate of increase of mass of species i due to chemical reactions, kg/s rate at which mass enters a control volume, kg/s rate at which mass ... 7.4.2 Convection Heat and Mass Transfer 457 The Sphere Flow Across Banks of Tubes Impinging Jets 7.7.1 Hydrodynamic and Geometric Considerations 477 7.7.2 Convection Heat and Mass Transfer 478 Packed ... 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...

Ngày tải lên: 02/04/2014, 15:51

... the heat rate PROBLEM 1.10 KNOWN: Thickness, diameter and inner surface temperature of bottom of pan used to boil water Rate of heat transfer to the pan FIND: Outer surface temperature of pan ... Electrical heater is perfectly insulated from dryer wall, (3) Heater and switch are isothermal at Tset, (4) Negligible heat transfer from sides of heater or switch, (5) Switch surface, As, loses heat ... between hand and surroundings in the case of air flow ANALYSIS: The hand will feel colder for the condition which results in the larger heat loss The heat loss can be determined from Newton’s law of...

Ngày tải lên: 02/04/2014, 15:52

... 1.1 HEAT TRANSFER The study of heat transfer is directed to (i) the estimation of rate of flow of energy as heat through the boundary of a system both under steady and transient conditions, and ... involvement of mass flow and mixing This is the mode of heat transfer through solid barriers and is encountered extensively in heat transfer equipment design as well as in heating and cooling of various ... OVERVIEW OF HEAT TRANSFER 14 FUNDAMENTALS OF HEAT AND MASS TRANSFER Problem 5: A spherical reactor vessel of outside radius 0.48 m has its outside temperature as 123.4°C The heat flow out of the...

Ngày tải lên: 08/04/2014, 10:55

... the heat rate PROBLEM 1.10 KNOWN: Thickness, diameter and inner surface temperature of bottom of pan used to boil water Rate of heat transfer to the pan FIND: Outer surface temperature of pan ... Electrical heater is perfectly insulated from dryer wall, (3) Heater and switch are isothermal at Tset, (4) Negligible heat transfer from sides of heater or switch, (5) Switch surface, As, loses heat ... between hand and surroundings in the case of air flow ANALYSIS: The hand will feel colder for the condition which results in the larger heat loss The heat loss can be determined from Newton’s law of...

Ngày tải lên: 08/08/2014, 17:20

... thickness and thermal conductivity of steel tubes Temperature of steam flowing through the tubes Thermal conductivity of insulation and emissivity of aluminum sheath Temperature of ambient air and ... current and resistance of wire Wire diameter and emissivity Thickness, emissivity and thermal conductivity of coating Temperature of ambient air and surroundings Expression for heat transfer ... K and 1000 W/m, respectively PROBLEM 3.36 KNOWN: Temperature and volume of hot water heater Nature of heater insulating material Ambient air temperature and convection coefficient Unit cost of...

Ngày tải lên: 08/08/2014, 17:20

... and thermal conductivities of a heater and a finned sleeve Convection conditions on the sleeve surface FIND: (a) Heat rate per unit length, (b) Generation rate and centerline temperature of heater, ... h l ∆x/k + ) T13 = < COMMENTS: For fixed To and T∞, the relative amounts of heat transfer to the air and heat sink are determined by the values of h and R ′′ t,c PROBLEM 4.41 KNOWN: Nodal point ... section of a square channel FIND: (a) Beginning with properly defined control volumes, derive the finite-difference equations for nodes 2, and 7, and determine T2, T4 and T7, and (b) Heat transfer...

Ngày tải lên: 08/08/2014, 17:20

... finite-difference method of solution with IHT (∆x = 0.1 mm and ∆t = ms) Calculate and plot the frictional heat fluxes to the reaction and composite plates, q′′ and q′′ , respectively, as a function of time Comment ... spatial and time increments of ∆x = mm and ∆t = 1s, compute and plot the temperature distributions in the wall for the initial condition, the steady-state condition, and two intermediate times, and ... With a time increment of ∆t = s, obtain values of Tm for the first 45s of elapsed time; determine the corresponding heat fluxes at the boundaries; and (d) Determine the effect of mesh size by repeating...

Ngày tải lên: 08/08/2014, 17:20

... Cylinder diameter and surface temperature Temperature and velocity of fluids in cross flow (a) Rate of heat transfer per unit length for the fluids: atmospheric air and saturated water, and engine oil, ... Dimensions of chip and pin fin Chip temperature Free stream velocity and temperature of air coolant (a) Average pin convection coefficient, (b) Pin heat transfer rate, (c) Total heat rate, (d) Effect of ... conductivity and emissivity of Nichrome wire Electrical current Temperature of air flow and surroundings Velocity of air flow (a) Surface and centerline temperatures of the wire, (b) Effect of flow...

Ngày tải lên: 08/08/2014, 17:20

... rate and properties of hot fluid Initial temperature, volume and properties of pharmaceutical Heat transfer coefficient at outer surface and dimensions of coil FIND: (a) Expressions for Tc(t) and ... conductivity and inner and outer diameters of plastic pipe Volumetric flow rate and inlet and outlet temperatures of air flow through pipe Convection coefficient and temperature of water FIND: ... KNOWN: Flow rate and inlet temperature of water passing through a tube of prescribed length, diameter and surface temperature FIND: (a) Outlet water temperature and rate of heat transfer to water...

Ngày tải lên: 08/08/2014, 17:20

... Diameter and outer surface temperature of steam pipe Diameter, thermal conductivity, and emissivity of insulation Temperature of ambient air and surroundings FIND: Effect of insulation thickness and ... air and surroundings at 25°C FIND: (a) Heat transfer rate by free convection to the room, per unit length of the tube; effect on quality, x, at outlet of 30 m length of tube; (b) Effect of radiation ... 30 m length of tube; (b) Effect of radiation on heat transfer and quality of outlet flow; (c) Effect of emissivity and insulation thickness on heat rate SCHEMATIC: ASSUMPTIONS: (1) Ambient air...

Ngày tải lên: 08/08/2014, 17:20

... Overall heat transfer coefficient, U, for the HXer, outlet temperature of cooling water, Tc,o,   and condensation rate of the steam m h ; and (b) Compute and plot Tc,o and m h as a function of the ... Tube diameter D and length L which satisfies the heat transfer and pressure drop requirements, and (b) Compute and plot the cold stream outlet temperature Tc,o, the heat rate q, and pressure drop ... tube heat exchanger undergoing test after service for an extended period of time; surface area of m and design value for the overall heat transfer coefficient of Ud = 38 W/m ⋅K FIND: Fouling factor, ...

Ngày tải lên: 08/08/2014, 17:20

... relative to q′′ conv and εEb and dT/dt is still significant PROBLEM 12.92 KNOWN: Temperatures of furnace wall and top and bottom surfaces of a planar sample Dimensions and emissivity of sample FIND: ... history of the workpiece from the start of heating to the end of cooling; identify key features of the process; determine the total time requirement; and justify the lumped-capacitance method of analysis ... (1) where α and ε are determined from knowledge of αλ and h is estimated from an appropriate correlation Plate total emmissivity: From Eq 12.38 written in terms of the band emission factor, F(0...

Ngày tải lên: 08/08/2014, 17:20

... coefficient and temperature of gas flow over the tube Temperature of surroundings FIND: (a) Rate of heat transfer to tube without ash deposit, (b) Rate of heat transfer with an ash deposit of diameter ... Dimensions and inclination angle of a flat-plate solar collector Absorber and cover plate temperatures and emissivities FIND: (a) Rate of heat transfer by free convection and radiation, (b) Effect of ... PROBLEM 13.111 KNOWN: Diameters and temperatures of a heated tube and a radiation shield FIND: (a) Total heat loss per unit length of tube, (b) Effect of shield diameter on heat rate SCHEMATIC: ASSUMPTIONS:...

Ngày tải lên: 08/08/2014, 17:20

... 1.2.3.2.4 Heat and Mass Transfer Interface Conditions For heat transfer interface conditions, usually continuities of temperature and heat flux are required (Neale and Nader, 1974; Vafai and Thiyagaraja, ... NUMERICAL STUDY OF HEAT AND MASS TRANSFER IN POROUS-FLUID COUPLED DOMAINS CHEN XIAOBING (B Eng., University of Science and Technology of China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHYLOSOPHY ... stress jump conditions for the flow, heat and mass transfer in porous/fluid coupled domains, and to investigate their effects on local and global heat and mass transfer; To implement the numerical...

Ngày tải lên: 12/09/2015, 21:13

... Fundamentals of Momentum, Heat, and Mass Transfer 5th Edition Fundamentals of Momentum, Heat, and Mass Transfer 5th Edition James R Welty Department of Mechanical Engineering Charles E Wicks Department of ... the foundation of engineering education and practice With the modifications and modernization of this fourth edition, it is our hope that Fundamentals of Momentum, Heat, and Mass Transfer will ... Difference 339 Crossflow and Shell -and- Tube Heat- Exchanger Analysis 343 The Number -of- Transfer- Units (NTU) Method of Heat- Exchanger Analysis and Design 347 Additional Considerations in Heat- Exchanger Design...

Ngày tải lên: 02/04/2014, 15:51

... students and had to rely on my own class notes and recent issues of journals for much of the syllabi of my classes The book is primarily concerned with convective heat transfer Essentials of mass transfer ... convective heat and mass transfer It also benefits from my more than 20 years of experience of teaching undergraduate heat transfer and other thermal fluid science courses to mechanical and nuclear ... with theory and practice of convection heat and mass transfer My incentive in writing the book is to strike a balance between well-established theory and practice on the one hand, and modern areas...

Ngày tải lên: 30/03/2014, 19:20

... Structure and Effectives Transport Properties Jean-Michel Hugo and Frédéric Topin Heat and Mass Transfer in Matrices of Hygroscopic Wheels C R Ruivo, J J Costa and ... Airflow Characteristics and Transport of Suspended Particles António F Miguel 115 On Analogy Between Convective Heat and Mass Transfer Processes in a Porous Medium and a Hele-Shaw Cell ... vapour permeability of the unpainted specimens and sd value of the applied paint 30 N M M Ramos and V P de Freitas Fig Vapour permeability of gypsum plaster and sd value of applied paint Moisture...

Ngày tải lên: 31/03/2014, 16:20

... Many heat and mass transfer problems can be solved using the balance equations and the heat and mass transfer coefficients, without requiring too deep a knowledge of the theory of heat and mass transfer ... fundamentals of heat and mass transfer, and enable him to solve practical problems On the other hand we placed special emphasis on a systematic development of the theory of heat and mass transfer and ... concepts and fundamental laws of heat and mass transfer The student obtains an overview of the different modes of heat and mass transfer, and learns at an early stage how to solve practical problems and...

Ngày tải lên: 02/04/2014, 15:27

... Rt,f mass, kg rate of transfer of mass for species, i, kg/s rate of increase of mass of species i due to chemical reactions, kg/s rate at which mass enters a control volume, kg/s rate at which mass ... 7.4.2 Convection Heat and Mass Transfer 457 The Sphere Flow Across Banks of Tubes Impinging Jets 7.7.1 Hydrodynamic and Geometric Considerations 477 7.7.2 Convection Heat and Mass Transfer 478 Packed ... 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...

Ngày tải lên: 02/04/2014, 15:51