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 ________