Category: PRESSURE DROP

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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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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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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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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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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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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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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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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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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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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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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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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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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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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