Technical Support provides solutions and workarounds to common technical dilemmas as they apply to different Xchanger Suite modules. HTRI staff also present live webinars on some of these issues. Check the Upcoming Events calendar to see when the next webinar will be offered or see the list of past TechTip webinars. 

Current TechTips

TT-1  Beware of large height under nozzle with parallel-cut baffles (updated 6/4/2024)

TT-2  Learn how driver power is calculated (updated 1/22/2021)

TT-5  Design guidance for distributor plates in X shells (updated 6/13/2024)

TT-7  Model flooding for horizontal tubeside condensers (posted 10/7/2008)

TT-9  Specify double-segmental baffles in Xist (posted 8/19/2009)

TT-10  Model electric heaters in Xist (updated 1/16/2023)

TT-13  Model supercritical fluids (updated 3/18/2025)

TT-14  Create custom templates for Xchanger Suite (updated 2/2/2022)

TT-15  Condensing heat transfer across inline low-finned tube bundles in cross flow (updated 8/7/2024)

TT-16  Selecting face velocities for API air-cooler designs (posted 2/19/2014)

TT-17  Tubecount assumptions in Xist (posted 3/25/2015)

TT-18  Design guidance for no-tube-in-window (NTIW) baffles (updated 5/16/2024)

TT-19  Piping options in Xist (updated 2/10/2023)

TT-20  Modeling plugged tubes in Xace (posted 11/17/2015)

TT-21  Calculating vapor velocity in vacuum condensers (posted 1/27/2016)

TT-22  Specifying annular distributors (updated 7/12/2024)

TT-23  Specifying tubeside reflux condensers in Xist (posted 1/23/2017)

TT-24  Modeling U-bend supports in Xist (posted 5/4/2017)

TT-25  Modeling anti-vibration support plates in Xist (posted 5/4/2017)

TT-26  Vibration analysis of nonbaffled H shells (posted 5/15/2018)

TT-27  Modeling air-cooled heat exchangers with redundant fans (updated 4/9/2025)

TT-28  Specifying disk-and-doughnut baffles in Xist (updated 10/26/2023)

TT-29 Kettle vaporizers and the modified three-point heat release curve (posted 2/17/2020)

TT-30 Modeling plate-and-shell heat exchangers using Xphe (updated 2/21/2024)

TT-31 Beware of flow obstructions in inlet and outlet regions (posted 2/14/2023)

TT-32 Condensation of two liquid phases in steam/hydrocarbon applications (posted 9/6/2023)

 

Retired TechTips

TT-3  Model fan-off operation in Xace (retired 4/7/2025)

TT-4  Flow boiling with small increase in weight fraction vapor (retired 4/7/2025)

TT-6  Handling excessive pressure drop for low pressure condensers (retired 6/27/2019)

TT-8  Model tube vibration in the bundle entrance region with parallel-cut baffles (retired 7/12/2021)

TT-11  Model DX evaporators in Xace and Xist (retired 10/12/2020)
 

Application Notes

Determining Input for Flue Gas Soot Extinction Coefficient

Guidelines for Tube Vibration Analysis

Modeling Temperature Profile in Vertical Tubeside Thermosiphons

Selecting Appropriate Face Velocity Ranges for Air-Cooler Designs