HTRI_2005年成都年会-板式换热器培训班资料_Xph.ppt

Xphe Workshop (Xphe研讨会),Workshop Goal(研讨会的目的),Presenting capabilities(演示Xphe的性能) Working a series of examples(列举例子),Learn how to use Xphe effectively by (学习怎么样有效的使用Xphe做：),Schedule,Morning Plate-and-frame geometry Process specifications Afternoon Fluid property specifications Design and analysis methods,Program Description,Xphe is a calculation engine/interface combination that calculates heat transfer and pressure drop performance for plate-and-frame exchangers.,Overview,Module 1 (Plate-and-Frame Geometry) Program capabilities Graphical user interface Module 2 (Process Specifications) Rating and simulations Performance parameters,Overview,Module 3 (Fluid Property Specifications) Grid properties Component by component Module 4 (Design and analysis methods) User-specified f- and j- curves Condensation Boiling,Module 1 Plate-and-Frame Geometry,Geometry supported Plate types, passes, port arrangement Geometry input Plate type Plate group Plate configuration Port configuration Design mode,Xphe Geometry,Plate-and-frame construction Rectangular plate with four ports One or two plate types yielding up to three effective chevron angles One six hot/cold passes,Xphe Geometry,Cocurrent or countercurrent flow within a pass U- or Z-flow for one pass User-defined or data bank plate geometry,Incrementation,Xphe Analyzes exchanger by dividing it into multiple small pieces Solves heat transfer and pressure drop in each increment using local physical properties Overall results integrate incremental results Increments Allow more accurate calculations Consider effects such as maldistribution,Incrementation,End Plates,1,2,3,4,5,6,1,10,Required Input,Red outlines on input fields indicate required input,Red outlines around icons indicate required input,Red arrows indicate subordinate panel containing required input,Plate Geometry,Internal plate databank User-defined plate types Input maximums Maximum of 12 plate groups 6 hot/cold passes each with only one channel type 3 hot/cold passes each with two channel types 2 hot/cold pass each with three channel types,Plate Geometry,Chevron angle,Vertical distance between ports,Horizontal distance between ports,Effective heat transfer area,Plate Geometry,Chevron angle and area per plate required,0.6 mm thickness, by default,Port Geometry Data,Port diameter and vertical/horizontal distance between ports required,Channel width and effective length based on port data,Plate Configuration,Flow diagram matches specified number of passes and flow configuration,Plate Configuration,Per pass Number of channels per fluid per pass (For uneven passes this number is for smaller number of passes.) Total Total number of channels per fluid User defined User-specified number of channels for each plate section,Plate Configuration,Number of different channel types,Plate Configuration,Mixture of plate types,Total channels for both fluids,Multiple Plate Types,Use one or two plate types to form channel Five plate types maximum for plate pack Example: with two plate types, 3 channel types available 1/1 1/2 2/2 Specify arrangement of plates on Plate Configuration panel,Why Use Multiple Plates?,Manufacturers produce finite set of plate types/chevron angles Heat transfer and pressure drop is function of chevron angle Effective chevron angle for mixed plate types is average of two chevron angles User can balance heat transfer and pressure drop requirements by mixing plate types,Multiple Plates Example,Plate Type 1 (e.g., 30 degree),Plate Type 2 (e.g., 60 degree),1/1,1/2,2/2,Effective Chevron Angle,30,45,60,Port Arrangement,Port Arrangement,Use drop-down menu to switch frame/pressure plate between left and right drawing. No effect on calculations.,Port Arrangement,To change port configuration, right-click any port location,Design,Specified exchanger duty and process conditions Some elements of exchanger geometry optimized to meet design constraints Required duty Maximum pressure drop Port velocity Plate type(s) defined,Design Algorithm,Two design algorithms/strategies available Select desired option on Input Summary panel,Classic Design,Specify case as usual Select Classic Design Run case Algorithm automatically adjusts specific geometry to achieve desired duty within pressure drop constraints Number of channels (plates) Number of fluid passes Pack configuration (how many channels of each type),Grid Design,Specify case as usual Select Grid Design Select geometry to consider on Design Geometry panel Geometry parameters Range of geometry Run case Grid of cases is run over specified range of values,Design Geometry,Click check box to enable variation of item in design run,Select different tabs to access all design geometry items,Design Constraints,Design options (Classic or Grid) will not select a design that violates constraints specified on this panel.,Design Warnings,Xphe flags (in Design View) any case that violates constraints specified on this panel, but may still be selected for final design,Design View,Program automatically selects best design. Best is smallest area with acceptable overdesign and no constraint violations. User may also select any alternate design.,Lines in red indicate runs that violate design constraint (C) or design warning (W).,Example 1 Oil Cooler,Open Example1.htri TEMA AEU oil cooler -in. tubes 10 ft long TEMA fouling factors,Example 1 Design Plate Frame Oil Cooler,Select File menu, New Plate and Frame Exchanger Select Window menu, Tile Horizontally Drag-and-drop Process Hot fluid properties Co