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Monster Media 1996 #14
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Monster Media No. 14 (April 1996) (Monster Media, Inc.).ISO
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mixing10.zip
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SALES.TXT
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1996-01-28
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ALCHEMY SYSTEMS
P.O. BOX 694
PAOLI, PA 19301
cheme1@voicenet.com
We would like to introduce the chemical engineering programs
developed by Alchemy Systems. The Programs will run on IBM
PC's,XT's,AT's and compatibles without difficulty. They feature
user friendly menu driven formats and pop-up windows to simplify
operations. Operating manuals are provided.
MIXER DESIGN PROGRAMS
The Mixer design programs will enable the design engineer to
calculate the vessel and agitator requirements for liquid
blending, gas dispersion, and shaft design problems. The gas
dispersion program includes correlations to predict mass transfer
coefficients. These programs are valuable for design, checking
vendor bids and for scale-up of laboratory to commercial scale
mixing equipment. Both English and Metric Units are provided.
LIQUID BLENDING PROGRAM CAPABILITIES
Vessel Design : Calculates the mixer vessels volume, Csa, Surface
area, shell thickness and vessel weight given the vessels
diameter, design pressure and type of head. The shell thickness
calculations accept input for various materials, and weld
efficiencies. This section of the program is useful for the
design of any vessel.
Fluid Input : Calculates the physical properties of the final mixture
from the physical properties of the Bulk and the Dispersed
Fluid. Accurate methods are used for predicting the mixture
density, heat capacity, thermal conductivity, surface tension
and viscosity. The viscosity predictions are based on the ASTM
Blending Index method.
Agitator Design : Calculates the mixing BHP, The Standard Motor Size,
The circulation flow, the velocity in the tank, the turnover time,
the blend time, the tip speed, maximum shear stress, torque,
Reynolds numbers, Power Numbers, Flow Numbers, and Heat transfer
coefficients for jackets and coils. The program supports Propeller,
Hydrofoil, Axial, Radial, Disk, Retreat Blade, Anchor and Helix
Agitators. The Number of Blades and the Width/ Diameter ratio
of the blades can be changed to compare effects on BHP
consumption and circulation rates. The Diameter and rpm of the
selected agitator type can also be easily modified to perform
case studies. The program features useful pop-up menus that
aid the designer in making the proper selections for the
agitator design. For example, industrial standard values for the
number of agitator blades and blade widths are provided during
input selection, and a table of the Standard AGMA RPM's are
presented to help in selecting the correct speeds.
Shaft Design : The location of the various impellers are given as
input and the program will calculate the impeller weights from
the results of the Agitator design program. It will calculate the
require shaft thickness by performing a critical speed and torque
analysis. Both top supported and bottom steady bearing systems are
studied.
GAS MIXING PROGRAM CAPABILITIES
The Gas Mixing program is identical to the blending program in the
Vessel Design and liquid properties sections. However, it also
includes a gas Bubbler reactor design programs that will
calculate the Gas Holdup, Kla [mass transfer coefficient] for both
Air/Water and the specific gas/liquid System. This is useful for
reactor designs where mixers are not present. The mass transfer
coefficients for the system are calculated from input data, such
as the gas diffusivity, Henry's law coeffients and gas reactant
partial pressure. Systems such as hydrogenators can be evaluated
as well as the standard Air-Water system provided in the program
for comparison.
The Agitator design section will calculate the Gas Holdup at
Different power levels and will design the impeller diameter
to satisfy power requirements at specified gas loadings. The
different power requirements of the bottom agitator and the
upper agitators are calculated, assuming that the lower agitator
must disperse the bulk of the gas. The improvement in the
reactors Mass transfer coefficient with power input is also
calculated. Pop-up menus are furnished that supply data
for prediction of mass transfer coefficients, as well as
data for the agitators. The program can be used in either a
design or a rating mode.
SHAFT RATING PROGRAM CAPABILITIES
The shaft rating program permits various shaft, agitator
combinations to be evaluated for stess, vibration, and critical
speed analysis. Both bottom steady bearings and overhung shafts
can be studied.
PIPE SIZING PROGRAMS
Incompressible Flow : This program performs single phase line
sizing calculations. It is accurate for liquid, and gas at
moderate pressure drops, and for laminar and turbulent flow.
Valves and fittings can be specified from a menu. The fluid flow
can be specified in various units for mass or volume flow rates.
The Density can be given as Lb/FT3 or Specific Gravity. The
pipe Roughness for different types of conduits and pipe is
provided by the program. The internal diameter of different
Schedule pipe automatically provided. The hydraulic diameter
can be calculated for annulus or rectangular ducts. The program
will calculate the PSI pressure drop per 100 ft. and the total
pressure drop.. The fluid velocity, Reynolds number and friction
factor are provided. The program will function in a design mode
to calculate the required pipe diameter to meet a specified
pressure drop.
Compressible Flow : This program calculates the adiabatic and
isothermal pressure drop for gas flow. It includes the features
of the incompressible flow program, and in addition calculates
the adiabatic temperature drops, density changes, and is accurate
for high velocity flows. Pressure drop is calculated for a
specified gas flow rate, and alternatively the flow rate can be
determined from a specified pressure drop. Sonic velocities
and Mach numbers are generated for inlet and outlet conditions.
Two Phase Flow : This program will calculate the flow regime for
two phase flow using the Baker chart correlations, and will
calculate the pressure drop for two phase flow using the
Lockhart Martinelli, and other methods specific for the flow
regime. The static head of vertical two phase flow problems is
also calculated. The program includes the features of the pipe
sizing program such as automatic determination of the pipe ID
from the schedule class and nominal diameter, and permits the use
of fittings.
Pipe Network : Complex pipe networks consisting of several hundred
pipes and nodes are solved by rapid Newton Raphson methods.
Ideal for calculating cooling water, firewater distribution, and
flare header systems. Both liquid or gas systems are handled
with flow loops and branched systems. Uses rigorous methods
for friction factors and pressure drops to calculate the flow in
the pipes. Features include addition of Pumps or Compressors,
Fittings, Additional pressure drop, and flow controllers.
Internal diameters of pipes are provided from nominal diameters.
Various units are permitted for flow such as English (USA), and
Metric Units. Flow rates in or out of various Nodes or pressures
can be specified. The program will perform initial estimates
of pressures if not supplied to aid in convergence.
LINEAR PROGRAMMING
The Linear Programming system is an operations research
program that solves business and engineering optimization
problems. For example, the program can calculate the lowest
cost transportation network to ship products or determine the
optimum product structure for a chemical plant or refinery. It
uses the simplex algorithm to determine the optimum solution
to any problem that can be expressed in terms of linear
constraints. The programs are written in machine language with
efficient algorithms to solve problems rapidly. A efficient data
editor is provided in the programs to ease the task of data
input and correction. Three programs are provided. One program
is written to solve problems with up to 50 variables and
constraints and can be used interactively on any system. It
only requires a 64 K system memory. The other two programs
solve large matrix problems and require 520 or 640 Kbytes
memory respectively. The maximum free memory of the PC is used.
These programs can solve problems with up to 200 variables and
constraints. There are over 20 example problems provided on the
disk that are used to teach the use of the program and to
illustrate the methods used in Linear Programming. Typical
problems provided concern the use of linear programming to
establish chemical plant and refinery product optimization,
transportation networks and other cases of interest to chemical
engineers.
PROGRAM COSTS
The Mixer Programs cost $800 dollars. The Line Sizing programs
cost $400. The Linear Programming System cost $100 dollars.
SPECIAL OFFER All four packages can be purchased together for $1000
dollars. Send a check or company Purchase order to Alchemy
Systems at the Address above. Overseas orders should add $30
dollars for shipping, and include a check in US dollars.
Purchase orders are accepted for US shipments. Pennsylvania orders
should include sales tax of 6 percent. Demo Disk provided by
sending ( $5/USA~$15/Overseas ) to cover shipping.
Alchemy Systems provides a 30 day Money Back Guarantee if the
programs do not work to your satisfaction.
ORDER FORM
MIXING PROGRAMS $800.00 ________
LINEAR PROGRAMMING $100.00 ________
PIPE SIZING PROGRAMS $400.00 ________
ALL PROGRAMS $1000.00 ________