mass transfer operations - robert treybal

Ngày tải lên: 02/04/2014, 15:43

... THEORY 103 2.5 MASS- AND HEAT -TRANSFER ANALOGIES 110 2.6 CONVECTIVE MASS- TRANSFER CORRELATIONS 119 2.6.1 Mass- Transfer Coefficients for Flat Plates 120 2.6.2 Mass- Transfer Coefficients ... movm2-s. superficial liquid-phase molar velocity; mol/m2-s. superficial gas-phase molar velocity; mol/m2-s. superficial liquid -mass velocity; kg/m2-s. superficial gas -...

Ngày tải lên: 02/04/2014, 15:44

... present paper introduces a method of modeling the process of heat and mass transfer in the space containing eggs in a non-linear differential model . The model allowed to determine basic parameters ... các giả thiết nh sau: - Trứng là hình cầu với đờng kính tơng đơng d k có cùng kích thớc và cấu tạo giống nhau. - Phần trứng và phần rỗng trong khối trứng là đồng đều. - Bỏ...

Ngày tải lên: 28/08/2013, 08:31

... and Environment Foundation - All rights reserved. Keywords: Finite time thermodynamics; Four -mass- reservoir chemical pump; Finite-rate mass transfer; Diffusive mass transfer law; Coefficient ... irreversible two -mass- reservoir chemical pump with the irreversibility of mass transfer and the mass leak. Lin et al. [30] studied the performance of the irreversible two -m...

Ngày tải lên: 05/09/2013, 15:28

... 6.8552 -0 .3046 4.1016 -0 .2363 2 12.1139 3.2345 8.1317 2.3879 5.4092 1.7626 3.5516 -1 .5804 7 16.1056 -9 .1989 5.9856 -8 .9066 4.2561 -5 .4226 2.8680 -4 .9101 9 18.1481 -1 0.812 5.5672 -1 0.508 4.0844 -6 .8703 ... vertical plate with constant suction and mass transfer. Int. J. Heat Mass Trans.1977, 20, 136 3-1 373. [5] Hossain M. A., Begum R. A. Effe...

Ngày tải lên: 05/09/2013, 15:28

... diffusive mass transfer is greater than the convective mass transfer, then resistance is said to occur on the external surface of the particle and the CDP dominates. However, if the diffusive mass transfer ... 10 -3 - 1 x 10 -4 are adopted. Solution convergence is set to occur for cases where scaled residuals far all variables fall below 1 x 10 -3 , except fo...

Ngày tải lên: 16/02/2014, 19:20

... heat transfer driving force ˜ B h Molar-flux-based heat transfer driving force B m Mass- flux-based mass transfer driving force ˜ B m Molar-flux-based mass transfer driving force Bi Biot number = ... heat transfer (m) M Molar mass (kg/kmol) Ma Mach number m Mass fraction; dimensionless constant m Mass (kg); mass of a single molecule (kg) m  Mass flux (kg/m 2 s) N Ratio...

Ngày tải lên: 30/03/2014, 19:20

... Australian Department for Environment and Heritage, Adelaide City Council, ISBN 97 8-0 -9 80512 6-4 -9 (print), ISBN 97 8-0 -9 80512 6-5 -6 (online) (2008) Treatment of Rising Damp in Historical Buildings 23 ... Guimarães, A.S.: Humidade Ascensional. FEUP edições, ISBN: 97 8-9 7 2-7 5 2-1 0 1-2 , 1st edn. Porto (Portuguese) (2008) 2. de Freitas, V.P.: Transfer ncia de hu...

Ngày tải lên: 31/03/2014, 16:20

... Applications 1.5 Mass transfer theories The calculation of the mass transfer coefficient can be carried out in different ways. Therefore a decision has to be made as to the type of problem, and which mass transfer ... heat transfer coefficient W/(m 2 K) β mass transfer coefficient m/s β m mean mass transfer coefficient m/s β thermal expansion coefficient 1/K β polar angle, zenith a...

Ngày tải lên: 02/04/2014, 15:27

... Pressure NA D dC dx / =- qA k dT dx / =- qA d CpT dx / () =-a r FA dv dy xqx x / ==-tm FA dv dy xyx x / () =-tn r q/A v ddp dx x = =- 2 32m qA v Kdp dx x / = =- m MASS TRANSFER Principles and ... Sherwood Number 159 5.2 Mass Transfer Coefficients in Laminar Flow: Extraction from the PDE Model 160 5.2.1 Mass Transfer Coefficients in Laminar Tubular Flow 162 5.2.2 Mass...

Ngày tải lên: 02/04/2014, 15:43