fundamentals of heat and mass transfer pdf free download

Ngày tải lên: 08/08/2014, 17:20

... Convection Heat and Mass Transfer 457 7.5 The Sphere 465 7.6 Flow Across Banks of Tubes 468 7.7 Impinging Jets 477 7.7.1 Hydrodynamic and Geometric Considerations 477 7.7.2 Convection Heat and Mass Transfer ... in heat transfer. It explains the linkage between heat transfer and thermodynamics, and it reveals the relevance and rich- ness of the subject. It should be covered in its entirety. Much of the ... is 25ЊC and the plate measures 0.3 ϫ 0.3 m with a mass of 3.75 kg and a specific heat of 2770 J/kg ⅐ K. 1.23 A transmission case measures W ϭ 0.30 m on a side and receives a power input of P i ϭ...

Ngày tải lên: 02/04/2014, 15:51

... water-ice mixture. Mass and specific heat of reference sphere. FIND: Specific heat of the test sphere of known mass. SCHEMATIC: ASSUMPTIONS: (1) Spheres are of equal diameter, ... Electrical heater is perfectly insulated from dryer wall, (3) Heater and switch are isothermal at T set , (4) Negligible heat transfer from sides of heater or switch, (5) Switch surface, A s , loses heat ... KNOWN: Power consumption, diameter, and inlet and discharge temperatures of a hair dryer. FIND: (a) Volumetric flow rate and discharge velocity of heated air, (b) Heat loss from case. SCHEMATIC:...

Ngày tải lên: 02/04/2014, 15:52

... value of the heat rate. PROBLEM 1.39 KNOWN: Power consumption, diameter, and inlet and discharge temperatures of a hair dryer. FIND: (a) Volumetric flow rate and discharge velocity of heated ... Electrical heater is perfectly insulated from dryer wall, (3) Heater and switch are isothermal at T set , (4) Negligible heat transfer from sides of heater or switch, (5) Switch surface, A s , loses heat ... KNOWN: Dimensions, thermal 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: ...

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 28/08/2013, 08:31

... Convection Heat and Mass Transfer 457 7.5 The Sphere 465 7.6 Flow Across Banks of Tubes 468 7.7 Impinging Jets 477 7.7.1 Hydrodynamic and Geometric Considerations 477 7.7.2 Convection Heat and Mass Transfer ... engineering education and practice, and whether the discipline of heat transfer would remain relevant. After weighing various arguments, we concluded that the future of engineering was bright and that heat transfer ... of heat transfer by free convection and radiation exchange. (b) To assess the trade-off between current-carrying capacity, operating temperature, and bar diameter, for diameters of 10, 20, and...

Ngày tải lên: 02/04/2014, 15:51

... COMBINED MODES OF HEAT TRANSFER Previous sections treated each mode of heat transfer separately. But in practice all the three modes of heat transfer can occur simultaneously. Additionally heat generation ... blank type and true or false type questions are provided to test the understanding of the basic principles. Author PREFACE vii VED c-4\n-demo\damo2-3 74 FUNDAMENTALS OF HEAT AND MASS TRANSFER 0.1 ... Problem model. VED c-4\n-demo\demo1-1.pm5 12 FUNDAMENTALS OF HEAT AND MASS TRANSFER Solution: Refer equation 1.10 Heat convected + heat radiated = heat conducted considering 1m 2 , h(T 1 – T 2 )...

Ngày tải lên: 08/04/2014, 10:55

... symbols dQ and dW represent differential heat transfer and work done, respectively. The differential operator, d, is used as both heat transfer and work are path functions and the evaluation of integrals ... 380 23.10 Radiant Heat Transfer Between Gray Surfaces 381 23.11 Radiation from Gases 388 23.12 The Radiation Heat- Transfer Coefficient 392 23.13 Closure 393 24. Fundamentals of Mass Transfer 398 24.1 ... Molecular Mass Transfer 399 24.2 The Diffusion Coefficient 407 24.3 Convective Mass Transfer 428 24.4 Closure 429 25. Differential Equations of Mass Transfer 433 25.1 The Differential Equation for Mass...

Ngày tải lên: 02/04/2014, 15:51

... components Heat output Fig. 9 Micro heat pipe [54] Two-Phase Flow and Heat Transfer in Micro-Channels 57 17. In, S., Jeong, S.: Flow boiling heat transfer characteristics of R123 and R134a in ... knowledge of heat transfer mechanisms at different conditions. Investigations on flow boiling heat transfer in literature have revealed numbers of criteria of system classification, flow instabilities and ... Microchannel Heat Sinks. J. Heat Transf. 129(10), 1341–1351 (2007) 37. Brutin, D., Tadrist, L.: Pressure drop and heat transfer analysis of flow boiling in a minichannel: influence of the inlet...

Ngày tải lên: 31/03/2014, 16:20

... problems of heat transfer and sometimes mass transfer. This large and very interesting area of fluid mechanics is still developing rapidly. For further information there are a wide range of multiple ... Generation of mass of a species Accumulation of mass of a species Input and output of mass of a species Example 2.1.2-1 Macroscopic species mass balance with zero -0 rde r irreversible ... for mass transfer: r 1 (1.1.2-3) where NA is the mass flux of species A, k, is the single-phase mass transfer coefficient, ZA~ is the concentration of A at the surface, and...

Ngày tải lên: 02/04/2014, 15:53

... gas and carrying gas with an inlet pressure of 1.4 and 1.6 MPa for the heating gas and powder carrying gas separately. Heating gas temperature range is 573 K to 773 K. Stand-off distance of ... increasing of catalyst activity, but cost of catalyst will be also increase. What Heat and Mass Transfer – Modeling and Simulation 82 inlet temperature of 493 K, 513 K, rate of △ X appeared ... polished by sand paper in order to wipe off the oxide film, and then cleaned by ethanol and deionized water. The morphology of the feed stock and coating before and after methanol and methane...

Ngày tải lên: 19/06/2014, 10:20

... drying and dry matter of samples Heat and Mass Transfer – Modeling and Simulation 152 i. the external mass transfer resistance is negligible, but the internal mass transfer resistance ... Poland). The samples of 100 g mass were dried. Such a mass ensured final maximum relative error of evaluation of sample moisture content not exceeding 1 %. The mass of samples during drying and ... (55), and (63)) Heat and Mass Transfer – Modeling and Simulation 170 (1) 2 1 Ml O g iL i i P nan P    (7) The calculation of the system composition to the balance coupled with the mass...

Ngày tải lên: 19/06/2014, 10:20