Tag: PRESSURE DROP

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BK1-17 Improvements to HTRI 1D Kettle Circulation Model

October 18, 2022

This report discusses bundle pressure drop and recirculation flow rate measurements. Comparing HTRI data trends to the bundle flow rate measurements from the literature, we developed an improved circulation model for kettle reboilers. The improved model predicts a higher recirculation, especially at a high vapor generation, which also improves the thermal...
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• PRESSURE DROP
• KETTLE REBOILER
• BOILING

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BT-41 Pressure drop method for tubeside falling film evaporators

October 19, 2020

HTRI collected data for falling film evaporation in a vertical tube using five test fluids. This report discusses available pressure drop methods and correlations for intube falling film evaporators and investigates correlations for liquid film thickness and void fraction. The report also documents an improved pressure drop method based on the...
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• PRESSURE DROP
• FALLING FILM

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Educational: Introduction to Two-phase Flow

December 04, 2018

Boiling, condensation, and multi-phase flows exist in many heat exchanger applications. This webinar describes the basic ideas used in heat transfer and pressure drop calculations of two-phase flow. It discusses theoretical and empirical models, a flow regime-based approach, and an overview of experimental research in the field....
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• HEAT TRANSFER
• PRESSURE DROP
• TWO-PHASE FLOW

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FH-5 Fired Heater Research: Two-phase Flow in Vertical Serpentine Loop

November 03, 2017

Adiabatic air-water studies were completed in a transparent vertical serpentine loop with a 12.7-cm internal pipe diameter and six vertical upflow and downflow sections with straight lengths exceeding 6 m. Liquid holdup in the vertical runs tends to dominate the overall pressure drop. This study focuses on flow visualization and pressure...
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• FIRED HEATER
• FLOW VISUALIZATION
• PRESSURE DROP

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Pressure Drop and Flow Regime Map for Vertical Upflow in Piping

December 13, 2016

HTRI research focusing on large diameter pipes led to improved prediction of flow patterns and valuable guidance to operators. Author Siddharth Talapatra, Senior Project Engineer, Research Date December 11, 2016 Liquid-gas two-phase flow can be challenging for the oil and gas, process, and nuclear industries due to the fact that a...
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• PRESSURE DROP
• FLOW REGIME

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Raising the Bar for Accuracy

August 04, 2016

A more precise calibration method helps the RTC maintain the highest standard of data accuracy. Author Tiffany Burgess, Test Engineer Date August 1, 2016 Research Technician Becky Glover performs a calibration at the TSPU Arthur C. Nielsen, Jr. once said, “Watch every detail that affects the accuracy of your work.” At the...
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• PRESSURE DROP

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Research Update: Two-phase Flow Research - Key Findings and Impact

April 13, 2017

HTRI recently concluded research in the following topics: Vertical Upflow – pressure drop and void fraction Vertical Upflow – flow regime map Vertical Downflow – pressure drop and void fraction Vertical Downflow – flow regime The details of the research, results, and discussions have been published in HTRI research reports TPF-14,...
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• FLOW REGIME
• PRESSURE DROP
• REPORT
• RESEARCH
• TWO-PHASE FLOW

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Research Update: Air-cooler Headers: Predicting Pressure Drop and Flow Distribution

January 16, 2017

Header flow maldistribution and pressure loss in air-cooled heat exchangers may significantly affect performance. Most relevant literature focuses on plate-fin and cylindrical channel headers for tubular heat exchangers. The flow in the header is affected by its internal geometry, the orientation of the nozzles on the header, and inlet flow velocity....
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• AIR COOLED
• CFD
• FLOW DISTRIBUTION
• PRESSURE DROP
• RESEARCH

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Research Update: Modeling Flow Distribution in Manifolds and Headers

January 16, 2017

In this webinar, we will discuss flow distribution and pressure drop for single T-junctions and manifolds by describing the T-junction resistance coefficients and how they vary with flow conditions and geometry describing manifold geometry and outlining the differential and discrete equation approaches for solving the flow distribution problem demonstrating which approach...
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• FLOW DISTRIBUTION
• PHE HEADER
• PLATE HEAT EXCHANGER
• PRESSURE DROP
• RESEARCH
• TWO-PHASE FLOW

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CT-36 Horizontal Intube Condensation Heat Transfer and Pressure Drop of Propane

January 16, 2017

Under contract with HTRI, the Sustainable Thermal Systems Laboratory (STSL) at Georgia Institute of Technology is studying intube condensation with pentane, propane, and propane/ethane mixtures. In the second phase of the study, the STSL acquired condensation heat transfer and pressure drop data using propane as the working fluid. This report reviews...
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• PRESSURE DROP
• HEAT TRANSFER
• CONDENSATION

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Research Update: Two-phase Pressure Drop across Changes in Cross-sectional Area

January 16, 2017

In this webinar, we describe pressure drop correlations and provide recommendations for their use. Many flow circuits include pipe diameter variations and piping components such as orifice plates, contractions, and expansions. Accurate prediction of the single- and two-phase pressure drops across these components is necessary to calculate the total pressure drop...
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• PRESSURE DROP
• RESEARCH
• TWO-PHASE FLOW

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Condensation Heat Transfer and Pressure Drop Measurement for Pure Hydrocarbons and Mixtures in Plain Tubes

January 16, 2017

In 2011, Professor Srinivas Garimella, the Hightower Chair and Professor and Founder/Director of the Sustainable Thermal Systems Laboratory (STSL) at the Georgia Institute of Technology in Atlanta, Georgia, USA, began work on a 3-1/2 year contract with HTRI entitled Condensation Heat Transfer and Pressure Drop of Propane. This project will conclude...
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• CONDENSATION
• PRESSURE DROP
• RESEARCH

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Research Update: Pressure Drop of Vacuum Condensation in a Vertical Tube

January 16, 2017

This webinar discusses the status of HTRI vacuum condensation research plans, describes the current methods in Xchanger Suite, and proposes a method to be implemented in future versions of Xchanger Suite....
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• CONDENSATION
• PRESSURE DROP
• RESEARCH
• VACUUM
• XCHANGER SUITE

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CT-33 Horizontal Intube Condensation at Georgia Tech: Test Rig and Initial n-Pentane Data

January 16, 2017

Under contract with HTRI, the Sustainable Thermal Systems Laboratory (STSL) at Georgia Institute of Technology is studying intube condensation with pentane, propane, and propane/ethane mixtures. The STSL is conducting experiments in the Phase-Change Heat Transfer Test Facility, a closed loop, single-pressure system. In the first phase of the study, the STSL...
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• PRESSURE DROP
• HEAT TRANSFER
• CONDENSATION

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Research Update: Pressure Drop in Inclined Intube Downflow Condensation

January 16, 2017

Based on recent research, HTRI has developed a new pressure drop method for inclined cocurrent condensation. In this webinar, we discuss the effect of tube inclination on two-phase flow regimes and pressure drop. The performance of the existing inclined condensation pressure drop method is assessed against data, and an improved pressure...
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• CONDENSATION
• INCLINED INTUBE
• PRESSURE DROP
• RESEARCH
• TWO-PHASE FLOW

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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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TechTip: Customized Heat Transfer and Pressure Drop Calculations in Xchanger Suite

January 16, 2017

Xchanger Suite provides sophisticated modeling capabilities for a wide range of heat exchangers. Occasionally, you may need to customize the software to extend its capabilities. In this webinar, we discuss the reasons for using non-standard solutions and explore the range of customization options available. Additionally, using an example case, we review...
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• HEAT TRANSFER
• PRESSURE DROP
• TECHTIP
• XCHANGER SUITE

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