» Overview of HTRI's Stream Analysis Method

Shellside flow analysis in shell‑and‑tube heat exchangers traces back to Tinker’s concept of modeling flow paths as a network of hydraulic resistances, later refined by Palen and Taborek into HTRI’s Stream Analysis Method (SAM). While SAM has long provided reliable predictions for baffled (TEMA E) shells, unbaffled configurations such as TEMA X shells present unique challenges due to limited experimental data. HTRI is addressing this gap through new research on seal‑strip design, extending SAM to improve hydraulic and thermal predictions for X‑shell heat exchangers.

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» New research report details modifications to the Resistance Proration Method

The Resistance Proration Method (RPM) for the effective vapor-phase heat transfer coefficient in mixture condensation previously relied on inlet mole fractions of noncondensing components. This has been replaced with a new parameter based on vapor‑phase molecular weights, reducing user input. CG-14 Modifications to Resistance Proration Method in Xchanger Suite® 9.3 and 9.4 describes the updated correction factor.

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Access to reports is based on the level of membership chosen by your company. Please contact your sales representative or membership@htri.net with any questions.

» HTRI offices closed for holiday

Our offices will be closed on May 25, 2026. Emails to Technical Support (support@htri.net) will be monitored and responded to based on urgency.

Sneak Preview: Xchanger Suite 9.4

Date: May 20, 2026

Session targeted for audience in Asia

Free webinar to HTRI members

Registration deadline: May 18, 2026

Register now

Sneak Preview: Xchanger Suite 9.4

Date: May 20, 2026

Free webinar to HTRI members

Registration deadline: May 18, 2026

Register now

Xist® Workshop

Date: June 8 – 11, 2026

Online with live Q&A; multiple session times available

Course fee: US$450

* Early registration deadline: May 21, 2026

Register now

* To qualify for the 10% early registration discount, your registration and approved credit card payment must be received and processed by our system by 11:59 PM US Central Time on the early registration date.

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