mechanisms of heat and mass transfer in freeze drying a mass transfer resistance

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

... Simulation of Mass and Heat Transfer in High Moisture Foods, Trans ASAE, pp 55-59 224 Husain A. , Chen C.S., Clayton J T (1973), Simultaneuos Heat and Mass Diffusion in Biological Material, Trans ASAE, ... 131-133 Haghighi K., Segerlind L.J, (1988), 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 ... 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...

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A numerical study of heat and mass transfer in porous fluid coupled domains

Danh mục: Tổng hợp

... Ochoa-Tapia and Whitaker’s 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; ... velocity and stress was proposed by Neale and Nader et al (1974) as well as Vafai and Kim (1990) The continuity of shear stress was also assumed by Vafai and Thiyagaraja (1987) as well as Kim and ... domains; To investigate the flow and mass transport in a microchannel reactor with a porous wall; and to develop combined non-dimensional parameters for a systematic and parametrical analysis of...

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fundamentals of heat and mass transfer

Danh mục: Hóa học - Dầu khí

... direction of heat ﬂow and the distinction between heat ﬂux and heat rate *This icon identiﬁes examples that are available in tutorial form in the Interactive Heat Transfer (IHT) software that accompanies ... and/ or exploratory, whatif, and parameter sensitivity considerations be addressed using a computational equationsolving package To this end, the Interactive Heat Transfer (IHT) package available ... foundation for lifelong learning The important and sometimes dominant role of heat transfer in many applications, particularly in conventional as well as in alternative energy generation and concomitant...

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incropera fundamentals of heat and mass transfer

Danh mục: Hóa học - Dầu khí

... thickness and initial and final temperatures of 304 stainless steel in an annealing process Dimensions of annealing oven and temperature, emissivity and convection coefficient of surfaces exposed to ambient ... coefficients in air and water at a prescribed temperature FIND: Heater surface temperatures in water and air SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) All of the electrical power is transferred ... conductivity and surface temperatures of a concrete slab Efficiency of gas furnace and cost of natural gas FIND: Daily cost of heat loss SCHEMATIC: ASSUMPTIONS: (1) Steady state, (2) One-dimensional conduction,...

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Fundementals of heat and mass transfer kotandaraman

Danh mục: Cơ khí - Chế tạo máy

... extensively in heat transfer equipment design as well as in heating and cooling of various materials as in the case of heat treatment The rate equation in this mode is based on Fourier’s law of heat conduction ... ρcV and dT where the group ρcV is called the heat capacity of the system The basic analysis in heat transfer always has to start with one of these relations Chapter 1 FUNDAMENTALS OF HEAT AND MASS ... FUNDAMENTALS OF HEAT AND MASS TRANSFER A sphere of 0.5m diameter containing hot fluid has an insulation of 0.1m thickness Before adding the insulation, the surface temperature was 260°C and heat loss...

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fundamentals of heat and mass transfer solutions manual phần 2 docx

Danh mục: Kĩ thuật Viễn thông

... container wall and contact resistance between wall and insulation, (3) Container wall at boiling point of liquid oxygen ANALYSIS: (a) Applying an energy balance to a control surface about ... With a thin coating of insulation, there exist contact and convection resistances to heat transfer from the cable The heat transfer rate is determined by heating within the cable, however, and ... exposed to a fluid of prescribed h and T∞ Thermal contact resistance between heater and tube wall and wall inner surface temperature FIND: Heater power per unit length required to maintain a heater...

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fundamentals of heat and mass transfer solutions manual phần 3 pdf

Danh mục: Kĩ thuật Viễn thông

... surface and grooves of a plate are maintained at a uniform temperature T1, while the lower surface is maintained at T2 or is exposed to a fluid at T∞ FIND: (a) Heat rate per width of groove spacing ... boundaries are maintained at a constant temperature (Ts) FIND: (a) Using a grid spacing of 30 mm and the Gauss-Seidel method, determine the nodal temperatures and the heat rate per unit length into ... Rectangular air ducts having surfaces at 80°C in a concrete slab with an insulated bottom and upper surface maintained at 30°C FIND: Heat rate from each duct per unit length of duct, q′ SCHEMATIC:...

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fundamentals of heat and mass transfer solutions manual phần 4 docx

Danh mục: Kĩ thuật Viễn thông

... variable, set the start value as 200 s and (4) save the results for the heating process in Data Set A The temperature-time history for the heating and cooling processes can be made using Data ... Plane wall, initially having a linear, steady-state temperature distribution with boundaries maintained at T(0,t) = T1 and T(L,t) = T2, suddenly experiences a uniform volumetric heat generation ... steady-state condition, and two intermediate times, and (b) On q′′ -t coordinates, plot the heat flux at x = and x = L At what elapsed x time is there zero heat flux at x = L? SCHEMATIC: ASSUMPTIONS:...

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fundamentals of heat and mass transfer solutions manual phần 5 ppsx

Danh mục: Kĩ thuật Viễn thông

... Rectangular Fins /* Model: Fin array with straight fins of rectangular profile, thickness t, width w and length L Array has N fins with spacing S */ /* Find: Array heat rate and performance parameters ... behaves as infinitely long fin, (2) Conditions of flow, as well as base and air temperatures, remain the same for both situations, (3) Negligible radiation heat transfer ANALYSIS: For an infinitely ... m increases and there is greater heat transfer enhancement due to increasing the diameter PROBLEM 7.46 KNOWN: Pin fin installed on a surface with prescribed heat rate and temperature FIND: (a) ...

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fundamentals of heat and mass transfer solutions manual phần 6 docx

Danh mục: Kĩ thuật Viễn thông

... conditions and (b) Calculate and plot q and ∆p for the range of diameters, 0.1 ≤ D ≤ 0.2 m, maintaining the total surface area, As = πDL, at the same value as part (a) Explain the trade off between ... 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 for ... temperature and heat rate, (b) Variation of outlet temperature and heat rate with flow rate Variation of water temperature along tube for the smallest and largest flowrates SCHEMATIC: ASSUMPTIONS:...

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fundamentals of heat and mass transfer solutions manual phần 7 pot

Danh mục: Kĩ thuật Viễn thông

... thermophysical properties, and initial and final temperatures of a pharmaceutical Diameter and length of submerged tubing Pressure of saturated steam flowing through the tubing FIND: (a) Initial rate of ... ε = 0.5) Fin base maintained at Tb = 150°C Ambient air and surroundings at 25°C FIND: Fin heat rate, qf, by two methods: (a) Analytical solution using average fin surface temperature of Ts = 125 ... KNOWN: A billet of stainless steel AISI 316 with a diameter of 150 mm and length 500 mm emerges from a heat treatment process at 200°C and is placed into an unstirred oil bath maintained at 20°C FIND:...

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fundamentals of heat and mass transfer solutions manual phần 8 ppsx

Danh mục: Kĩ thuật Viễn thông

... of water vapor Water inlet and outlet temperatures Initial and final overall heat transfer coefficients FIND: (a) Surface area for initial U and water flow rate, (b) Vapor flow rate for final ... Tube inner and outer diameters and longitudinal and transverse pitches for a cross-flow heat exchanger Number of tubes in transverse plane Water and gas flow rates and inlet temperatures Water ... tube heat exchanger of Example 11.1; maintaining the outlet oil temperature of 60°C, but with variable rate of cooling water, all other conditions remaining the same FIND: (a) Calculate and plot...

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fundamentals of heat and mass transfer solutions manual phần 9 ppt

Danh mục: Kĩ thuật Viễn thông

... isothermal and large compared to the plate, and (3) Coatings are diffuse and gray so that ε = α and ρ = - ε ANALYSIS: (a) When viewing the black coating (εo = 1), the scanner output signal can be ... independent of temperature, and (3) Furnace and cooling environment are large isothermal surroundings ANALYSIS: (a) Using Eqs 12.38 and 12.46, ε and α can be determined using band-emission factors, ... area

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fundamentals of heat and mass transfer solutions manual phần 10 doc

Danh mục: Kĩ thuật Viễn thông

... Temperatures of glass panes and rate of heat transfer through window, (b) Heat rate if gap is evacuated Heat rate if special coating is applied to window SCHEMATIC: ASSUMPTIONS: (1) Steady-state, (2) ... the inner and outer panes increase and decrease, respectively, and the heat loss decreases (3) Clearly, there are significant energy savings associated with evacuation of the gap and application ... KNOWN: Diameters of heated tube and radiation shield Tube surface temperature and temperature of ambient air and surroundings FIND: Temperature of radiation shield and heat loss per unit length of...

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fundamentals of heat and mas transfer seventh edition

Danh mục: Hóa học - Dầu khí

... direction of heat ﬂow and the distinction between heat ﬂux and heat rate *This icon identiﬁes examples that are available in tutorial form in the Interactive Heat Transfer (IHT) software that accompanies ... and/ or exploratory, whatif, and parameter sensitivity considerations be addressed using a computational equationsolving package To this end, the Interactive Heat Transfer (IHT) package available ... foundation for lifelong learning The important and sometimes dominant role of heat transfer in many applications, particularly in conventional as well as in alternative energy generation and concomitant...

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Báo cáo hóa học: " Effects of a robot-assisted training of grasp and pronation/supination in chronic stroke: a pilot stud" pot

Danh mục: Hóa học - Dầu khí

... robot-assisted rehabilitation of the hand, adopting a functional approach based on the combined training of grasping and forearm pronation/supination, two critical functions for manipulation ... in the motion data during the training translate to significant gains in functional activities in daily life Improvements in arm and hand function were maintained weeks after the completion of ... in pain levels in the two subjects who initially presented with minimal pain Robotassisted training may have helped pass a threshold of spontaneous arm use where ADL tasks involving arm and hand...

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Báo cáo hóa học: "Photochemically reduced polyoxometalate assisted generation of silver and gold nanoparticles in composite ﬁlms: a single step route" pptx

Danh mục: Báo cáo khoa học

... 23 S Mandal, P.R Selvakannan, R Pasricha, M Sastry, J Am Chem Soc 125, 8440 (2003) 24 S Shanmugam, B Viswanathan, T.K Varadarajan, J Mol Catal A 241 52 (2005) 25 M.G Vagara, E Papaconstantinou, ... increased [29] The FWHM of the surface plasmon band has increased from 74 to 112 nm as the dipping time has increased from to 30 And also, the increase in the surface plasmon band intensity indicates ... metal nanoparticles was characterized with various physicochemical techniques As such no reports are available at present for embedding the Ag and Au nanoparticles in organic–inorganic nanocomposite...

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Báo cáo y học: "Hormone replacement therapy, calcium and vitamin D3 versus calcium and vitamin D3 alone decreases markers of cartilage and bone metabolism in rheumatoid arthritis: a randomized controlled trial [ISRCTN46523456]" ppsx

Danh mục: Báo cáo khoa học

... hands, proximal interphalangeal joints of digits 1–5, metacarpophalangeal joints of digits 1–5, wrist areas 1–4; and in the feet, the interphalangeal joints of digit and the metatarsophalangeal ... Bedford, MA, USA) Radiographs Radiographs of the hands, wrists, and distal part of the feet were obtained at baseline and after 12 and 24 months Forty joints in the hands and feet were scored (in the ... the end of years was associated with the changes in ESR and ICTP, indicating an association with the inflammatory activity and processes of structural damage in the disease COMP is a 524-kDa, homopentameric,...

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