Tag: SINGLE-PHASE

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S-SS-3-30 Predictions of Single-phase Flow in TEMA F-shell Heat Exchanger: CFD vs. Xist

December 21, 2022

This report compares computational fluid dynamics (CFD) and Xist predictions of single-phase performance in a TEMA F-shell heat exchanger with a sealed longitudinal baffle. In the initial comparison, CFD underpredicted both duty (16% less) and pressure drop (over 50% less). We then represented an F shell in Xist using two E-shell...
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• XIST
• SINGLE-PHASE
• CFD
• BAFFLE

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S-ST-1-17 Using Neural Networks for Predicting Nusselt Number for Intube Laminar Flows

July 25, 2022

Neural networks can be used to predict the Nusselt number for intube laminar flow. In addition to describing the architecture of a neural network, this report discusses the application of a neural network to a manufactured data set, open literature data, HTRI data, and CFD simulation results. Our results illustrate the...
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• SINGLE-PHASE
• HORIZONTAL TUBES
• HEAT TRANSFER
• CONVECTION

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PHE-17-TR Liquid-phase and Boiling Testing in a Welded Plate Heat Exchanger

March 07, 2018

HTRI conducted liquid-phase and phase-change experiments in a welded plate heat exchanger (WPHE) provided by Hisaka Works, Ltd. With the test plate pack installed vertically, cold fluid flowed horizontally, and steam condensed downward. We conducted single-phase and boiling tests using p-xylene as the test fluid, as well as boiling tests using...
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• BOILING
• PLATE HEAT EXCHANGER
• SINGLE-PHASE
• XPHE

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TT-15 Single-phase vapor and condensing heat transfer across inline low-finned tube bundles in cross flow

January 26, 2017

Component: Xace, Xist Applicable to: Version 7.3 and previous Date posted: 22 May 2012 Last updated: 7 September 2017 Externally finned tube bundles can be specified for applications where the outside heat transfer coefficient is less than the inside coefficient. Using inline low-finned tubes in 90-degree layouts allows for cleaning by mechanical means....
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• CROSSFLOW
• FINNED TUBES
• SINGLE-PHASE

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Research Update: Single-Phase Crossflow Methods

January 16, 2017

HTRI continues to improve its single-phase crossflow methods. We have completed a thorough review of heat transfer and pressure drop correlations for single-phase flow outside banks of plain- and low-finned tubes. This webinar highlights some of our findings and summarizes the performance of the improvements we are proposing for our correlations....
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• CROSSFLOW
• FINNED TUBES
• PLAIN TUBE
• PRESSURE DROP
• RESEARCH
• SINGLE-PHASE

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S-ST-1-14 CFD Study of Single-Phase Laminar Mixed Convection in Inclined Tubes

January 16, 2017

To gain insight into the thermal-hydraulic phenomena associated with mixed convection in internal flows, we used computational fluid dynamics (CFD) to conduct a parametric study of single-phase laminar liquid flows in inclined tubes with isothermal, uniform wall temperatures (UWT). Both heating and cooling processes were simulated to isolate the effects of...
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• XIST
• SINGLE-PHASE
• CFD

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STG-13 Computational Fluid Dynamics Study of Impingement Plates

January 16, 2017

The results of a computational fluid dynamics (CFD) study of impingement devices for inlet nozzles on shell-and-tube heat exchangers reveal the deleterious effects of increased velocity and pressure drop for a number of configurations. Simulations of entry flows with round and square solid plates as well as with rod grids were...
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• SINGLE-PHASE
• SHELL-AND-TUBE
• IMPINGEMENT RODS
• CFD

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