preface evaporation condensation and heat transfer

... friction and the rate of heat transfer are discussed with the help of figures and tables Copyright © 2010 International Energy and Environment Foundation - All rights reserved Keywords: Heat transfer, ... -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 N u for different values of α and K p are entered in Table 2 The heat flux at the ... of mass transfer on unsteady flow past an accelerated vertical porous plate with suction Das and his co-workers [15] discussed the effect of mass transfer on MHD flow and Trang 2heat transfer

Ngày tải lên: 05/09/2013, 14:58

... for heat treatment practices In this article, thermo-physical properties, wetting and boiling heat transfer characteristics of nanofluids are reviewed and discussed The unique thermal and heat transfer ... nanofluid and different heat transfer mechanisms are expected to have a significant effect on heat transfer characteristics Xuan and Li [18] listed the following five reasons for improved heat transfer ... stress/strain evolution, and heat transfer is the driving physical event as it triggers other processes [1] The two phase (boiling) heat transfer is the predominant mode of heat transfer during quenching

Ngày tải lên: 21/06/2014, 04:20

... surface heat flux Chen and Char5 presented an exact solution of heat transfer for a stretching surface with variable heat flux P S Gupta and A S Gupta6 examined the heat and mass transfer ... suction and blowing Elbashbeshy and Bazid 7 studied heat and mass transfer over an unsteady stretching surface with internal heat generation Abd El-Aziz 8 analyzed the effect of radiation on heat ... and thermocapillarity on the flow and heat transfer in a laminar liquid film on a horizontal stretching sheet Mukhopadhyay 14 presented solutions for unsteady boundary layer flow and heat transfer

Ngày tải lên: 21/06/2014, 11:20

... Transient and multidimensional heat conduction §5.6Figure 5.17 A bubble growing in a superheated liquid Example 5.6 Predicting the Growth Rate of a Vapor Bubble in an Infinite Superheated Liquid ... direct-contact heat exchange Itwas originally presented by Max Jakob and others in the early 1930s(see, e.g., [5.10, Chap I]) Jakob (pronounced Yah-kob) was an im-portant figure in heat transfer during ... Tsat, by the near-equilibriumcoexistence of liquid and vapor Therefore, heat must flow from thesuperheated surroundings to the interface, where evaporation occurs So long as the layer of cooled

Ngày tải lên: 21/06/2014, 22:20

... pipe 7.2 Heat transfer to and from laminar flows in pipes Not many industrial pipe flows are laminar, but laminar heating and ing does occur in an increasing variety of modern instruments and equip-ment: ... which lies between ReD = 2100 and about 5000 in this case Above ReD  5000, the flow is turbulent and it turns out that NuD  Re 0.8 D The Reynolds analogy and heat transfer A form of the Reynolds ... development of flows in tubes witha uniform wall heat flux and with a uniform wall temperature (the entrance region). Figures7.2and7.3show the development of two flows and their sub-sequent behavior The two

Ngày tải lên: 21/06/2014, 22:20

... liquid-metal heat transfer NACA Tech Note 3336, 1955 [7.19] C B Reed Convective heat transfer in liquid metals In S Kakaç, R K Shah, and W Aung, editors, Handbook of Single-Phase Convec-tive Heat Transfer, ... E Dwyer Heat transfer to NaK flowing through unbaffled rod bundles Int J Heat Mass Transfer, 10:1533–1558, 1967 [7.29] W M Rohsenow, J P Hartnett, and Y I Cho, editors Handbook of Heat Transfer ... Boelter, V H Cherry, H A Johnson, and R C Martinelli Heat Transfer Notes McGraw-Hill Book Company, New York, 1965. [7.12] E N Sieder and G E Tate Heat transfer and pressure drop of liquids in tubes

Ngày tải lên: 21/06/2014, 22:20

... space, the heated fluid buoys up and then lows the contours of the container, releasing heat and in some way re-turning to the heater This recirculation process normally enhances heattransfer beyond ... Yuge’s correlation if RaDremains fairly large Laminar heat transfer from inclined and horizontal plates In 1953, Rich [8.15] showed that heat transfer from inclined plates could be predicted by ... Raithby and Hollands [8.13], and Catton [8.28] Combined natural and forced convection When forced convection along, say, a vertical wall occurs at a relatively low velocity but at a relativelyhigh heating

Ngày tải lên: 21/06/2014, 22:20

... verticaltube with a uniform wall heat flux (not to scale) 497 Trang 3498 Heat transfer in boiling and other phase-change configurations §9.7Relationship between heat transfer and temperature difference ... nucleate-boiling-controlled heat transfer and convective boiling heat transfer In those regimes where fully developed nucleate boiling occurs (the later parts of C), the heat transfer coefficient is ... Trang 11506 Heat transfer in boiling and other phase-change configurations §9.9the shear opposes the direction of gravity—then it will have the effect of thickening δ and reducing heat transfer Indeed,

Ngày tải lên: 21/06/2014, 22:20

... 35◦C, and a light breeze produces a convective heat transfer coefficient of h = 8 W/m2K The sky temperature is 18◦C Find the Trang 5578 Radiative heat transfer §10.6Table 10.4 Solar absorptance and ... assuming that no heat is transferred to the interior Then, an ergy balance on the roof must account for radiation absorbed fromthe sun and the sky and for heat lost by convection and reradiation: ... ft wide and 6 ft high The room is kept at 70◦F, but the pane is at 67◦F owing to heatloss to the colder outdoor air Find (a) the heat transfer byradiation to the window; (b) the heat transfer

Ngày tải lên: 21/06/2014, 22:20

... AppendixAand use eqn (11.52) and (11.53) to getthe thermal conductivities of the components: Species c p (J/kg ·K) kcalc(W/m ·K) kdata(W/m ·K) To compute µ m and k m, we use eqns (11.54) and (11.55) and ... diffuse hydro-as a result of random molecular motions (which we call Brownian tion) Kinetic and thermodynamic arguments, such as those given by mo-Einstein [11.16] and Sutherland [11.17], lead to an ... correlations and provide an assessment of their accuracies Trang 12The thermal conductivity and viscosity of dilute gasesIn any convective mass transfer problem, we must know the viscosity ofthe fluid and,

Ngày tải lên: 21/06/2014, 22:20

... Norris, F F Buckland, N D Fitzroy, R H Roecker, and D A. Kaminski, editors Heat Transfer Data Book General Electric Co., Schenectady, NY, 1977. [A.13] ASM Handbook Committee Metals Handbook ASM, ... E R G Eckert and R M Drake, Jr Analysis of Heat and Mass Transfer McGraw-Hill Book Company, New York, 1972. [A.2] Y S Touloukian Thermophysical Properties of Matter vols 1–6, 10, and 11 Purdue ... [A.3] and [A.21] Sources of olive oil data include [A.20, A.22, A.23], and those for Freon 12 include [A.14] Volumes 3, 6, 10, and 11 of [A.2] gave many of the other values of cp, k, and µ = ρν, and

Ngày tải lên: 21/06/2014, 22:20

... Conference, Bangkok, Thailand, June 8-10, pp 367-372 22 Evaporation, Condensation and Heat Transfer Islam, K.M.S (2006) Heat and vapor transfer in tubular solar still and its production performance, ... flow, and gas flow to the international community It includes 25 advanced and revised contributions, and it covers mainly (1) evaporation and boiling, (2) condensation and cooling, (3) heat transfer ... temperature and relative humidity fraction, Tha/RHha, for the first model and second one (Ahsan et al., 2010) 10 Evaporation, Condensation and Heat Transfer Theory of mass transfer 5.1 Previous evaporation...

Ngày tải lên: 19/06/2014, 12:20

... B and C-stage cooling which are currently designated as film boiling, nucleate boiling and convective cooling, based on the cooling time-temperature and 50 Evaporation, Condensation and Heat Transfer ... to another is not sharp: on the one hand, the bubble 58 Evaporation, Condensation and Heat Transfer density in the nucleate boiling region is not constant and, on the other, the probe surface ... between the thermocouple and the bore wall, the top surface of the probe was covered with high temperature cement (Omega, model Omega 600) 54 Evaporation, Condensation and Heat Transfer Fig Schematic...

Ngày tải lên: 19/06/2014, 12:20

... prediction of the critical heat flux, whose excess leads to the complete draining of heat- releasing surface and uncontrolled heating Study of heat transfer during boiling and evaporation of cryogenic ... understanding of the processes This is a way to test the existing model descriptions of heat transfer and the development of transient processes and crisis phenomena 96 Evaporation, Condensation and ... size of the vapour bubbles 82 Evaporation, Condensation and Heat Transfer On Fig 10 and Fig 11, we plot the evolution of the flow in respectively terrestrial and microgravity phase during nearly...

Ngày tải lên: 19/06/2014, 12:20

... measured the bottom and bulk temperature, which allowed to determine the conditions of heat transfer 126 Evaporation, Condensation and Heat Transfer a) c) b) d) Fig Heat transfer apparatus: ... quasi-homogenous structures, heat transfer conditions staying more stabilized and that situation remains unchanged still the long time 140 50 ΔT [K] a) Evaporation, Condensation and Heat Transfer Water - ... 1988) 128 Evaporation, Condensation and Heat Transfer The much more complex structures occur during boiling watered coal tars or mixtures of water and oil (with presence of oil lighter and heavier...

Ngày tải lên: 19/06/2014, 12:20

... condenser tube is a much better heat transfer surface At any tube 154 Evaporation, Condensation and Heat Transfer cross section with condensation, the local heat flux and heat transfer coefficient at ... mm and length; L=5.01 m 182 Evaporation, Condensation and Heat Transfer Fig Condensation heat transfer coefficient versus saturation temperature for different L/di at D =100 mm Condensation heat ... observed The heat transfer coefficient depended on the vapor and liquid flow rate The von Karman analogy between momentum transfer and heat transfer was used to predict the heat transfer coefficient...

Ngày tải lên: 19/06/2014, 12:20

... Condensation and Heat Transfer , Modelling the Thermo-Hydraulic Performance of Cooling Networks and Its Implications on Design, Operation and Retrofit 203 204 Evaporation, Condensation and Heat Transfer ... 200 Evaporation, Condensation and Heat Transfer Δ Modelling the Thermo-Hydraulic Performance of Cooling Networks and Its Implications on Design, Operation and Retrofit Δ 201 202 Evaporation, Condensation ... Thermo-Hydraulic Performance of Cooling Networks and Its Implications on Design, Operation and Retrofit 197 198 Evaporation, Condensation and Heat Transfer From heat balance determine V; estimate a value...

Ngày tải lên: 19/06/2014, 12:20

... developed and developing flow with different types of inlet disturbances: Part II – 260 Evaporation, Condensation and Heat Transfer heat transfer, International Journal for Heat and Mass Transfer, ... section 250 Evaporation, Condensation and Heat Transfer Data reduction The inner tube's average heat transfer coefficient was obtained by making use of the overall heat transfer coefficient and the ... b) re-entrant and c) bellmouth 248 Evaporation, Condensation and Heat Transfer Prior to and after the honeycomb, a wire mesh was placed with the wires having a diameter of 0.8 mm and the OAR being...

Ngày tải lên: 19/06/2014, 12:20

... volume element for random composites: statistical and numerical approach International Journal of Solids and Structures, 40(13-14), 3647-3679 302 Evaporation, Condensation and Heat Transfer Kaviany, ... the insulation wall, and it can be ignored in many solar heat receivers Corresponding author 304 Evaporation, Condensation and Heat Transfer In order to reduce the radiation heat loss, solar selective ... physical model of heat transport in solar heat receiver 306 Evaporation, Condensation and Heat Transfer The incident energy is directly concentrated by solar collector system, and its energy flux...

Ngày tải lên: 19/06/2014, 12:20

... efficiency Fig Heat transfer performances of molten salts receiver with different pipe radii (Tf=473 K, uav=1.0 ms-1) 312 Evaporation, Condensation and Heat Transfer The heat transfer characteristics ... the receiver radius and fluid temperature, and that of air receiver is similar 313 Heat Transfer Performances and Exergetic Optimization for Solar Heat Receiver Uneven heat transfer characteristics ... temperatures of fluid and wall increases, while the heat absorption 316 Evaporation, Condensation and Heat Transfer efficiency decreases very quickly As a result, the temperature and absorption characteristics...

Ngày tải lên: 19/06/2014, 12:20