Tuesday, January 24, 2006

Plant Design Part 3: Heat Transfer

Heat Transfer
PHEdesign (Plate Heat Exchangers)
PHEdesign 1.0 program for simulations of the plate heat exchanger. By setting our controlled variables and material properties, the optimum plate dimensions and materials can be selected by the computer program. These are included rate of heat transfer, the size of plate heat exchanger, and chevron angle (beta) between 25 to 65 degrees under single pass condition. Also this program is capable of calculating the pressure drop in plate, from which the energy and material can be saved by decreasing the pressure drop (decreasing horsepower per unit area) and increasing chevron angle
Vesselpak
Vesselpak is the industry-standard for the analysis of heat transfer in process vessels and fermenters. The software allows complete specification by the user of vessel and jacket liquids, full dimensional information on vessel, jacket and internal coil, agitator details. The user can choose from a range of jacket types including conventional, agitated conventional, half-pipe coil, baffled conventional, dimple jacket. Output includes full details of heat transfer coefficients, heat transfer rates versus time and agitator absorbed power. Printed and graphical output are available.
Space heating load
This program calculates the maximum heating load required in a space (single zone) so that a furnace can be sized. Heat transfer coefficients are built in for many types of wall, floors, doors, windows, etc. Custom values can also be used. The heat needed for infiltration & humidity control are also calculated. Final furnace sizes are tabulated with several values of efficiency.
Surface Condenser
This program, for analysis of turbine steam condensers, can either calculate the performance of a known condenser, or can calculate the design requirements of a new condenser for a known steam load. The steam and condensate properties are built in. Also a complete range of tube properties are built in. The cleanliness of a given condenser can be etermined quickly using a trial and error method.