Rate, simulate, and design jacketed-pipe (double-pipe) exchangers

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Xjpe® is an incremental program that contains HTRI’s latest pointwise methods based on extensive tubeside condensation, boiling, and single-phase data. The heat transfer and pressure drop correlations are continually improved as a result of our ongoing research.

As a module in Xchanger Suite®, Xjpe lets you quickly transfer applicable case data to other components like Xist® or Xhpe®.


  • Provides flexible specification of detailed exchanger geometry.
  • 2D incrementation calculates localized profiles for heat transfer and pressure drop.
  • Detailed output reports provide overall and localized results.
  • Extensive visualization tools show exactly how the exchanger is performing.
  • Integrated physical property system eliminates requirement for additional property generation software. Xchanger Suite includes VMGThermo™, an extensive and rigorous fluid physical property generator from Virtual Materials Group, Inc.
  • Includes built-in interface to most process simulators and mechanical design software.
  • Can be embedded as a unit operation in any process simulator supporting CAPE-OPEN.
  • Both input and output can be displayed in multiple unit sets, including user-defined sets. Dynamic display of values in all unit sets.
  • Session view allows tracking and retrieval of all runs made during a session.
Xjpe Geometry
Input panel defining double-pipe specific geometry.

Geometry Specifications

  • Plain and longitudinal-finned tubes
  • Twisted tapes and internal microfin tubes
  • Horizontal, inclined, and vertical orientations
  • Single shell, shells in series, shells in parallel, and series/parallel combinations
  • Integrated graphical nozzle location tool

Calculation Features

  • Rigorous heat transfer and pressure drop calculations using a 2D incrementation scheme that divides the exchanger into a large number of zones
  • Flexible process input allowing specification of known process information (temperature, weight fraction vapor, and/or flowrates) with the program calculating missing information based on energy balance
  • Three modes: rating (known duty and geometry), simulation (unknown duty and known geometry), and design (known duty and unknown geometry)
  • Optional specification of heat transfer coefficients and safety factors
Xjpe Design
Output view of alternate double-pipe designs.

Design Tools

  • Grid design option to vary geometry over user-specified ranges and step sizes
  • Design constraints to prevent selection of undesirable designs
  • Design view to display all alternative designs and to allow sorting and filtering of results
  • Option to create new case from any alternative design


  • Extensive set of spreadsheet-style output reports can be printed or exported to Microsoft® Excel®
  • Summary reports with overall results in one or two pages
  • Detailed reports for local profiles of all important parameters (temperature, pressure, heat transfer coefficients, heat flux, etc.)
  • 2D and 3D scaled drawings provide visual confirmation of exchanger geometry, allowing for quick identification of performance issues
  • Flow regime map provides regime visualization for two-phase process streams
  • User-defined graphs for easy accessibility