Category: XACE

Did you know that you can save a case in a different version of Xchanger Suite? This tutorial shows how to identify which version you are working in and how to save and open in a different version....
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For many exchanger designs, having plugged tubes in the bundle is necessary. This tutorial will demonstrate to users how to model plugged tubes in Xace....
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Winterization in accordance with API 661 Annex C may need to be considered by designers when air cooled heat exchangers are operating in climatic extremes. In order to prevent operating problems in-situ, a temperature safety margin should be added to the critical process temperature to determine the specified minimum tubewall temperature....
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Subcooling is often required for air cooled condensers. This webinar will address common technical support questions such as – how many tubes and passes are needed to subcool sufficiently? how is phase separation modeled? what are the best modeling guidelines for Xace? – and provide HTRI's recommendations. Attending this webinar will...
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Are you using Xchanger Suite to model finned-tube bundles? This webinar provides an overview of finned tubes and the various types of finned tubes that Xchanger Suite models. In addition to guidance on when to select each type, the session highlights important, high-level mechanical design aspects of finned tubes....
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API-compliant air coolers are modeled in two- and three-dimensional computational fluid dynamics (CFD) simulations to see what improvements are needed in Xace with regard to the airside maldistribution. We validated the CFD model using Xace base cases. We then used CFD to simulate non-ideal airside flow situations that can potentially affect...
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In this session, we walk through applying the HTRI Parametric Study Tool to a real case. We first model a one-fan-off Xace case and then work towards running a parametric study on air-cooler winterization. This webinar does not include any background information on the basics of the HTRI Parametric Study Tool....
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A-frame condensers can be modeled in Xace (version 6) by using the workarounds outlined in this webinar. After viewing this webinar, you will be able to describe A-frame geometry and analysis methods. The webinar includes a demonstration of Xace input options and works through two sample cases – a rating without...
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This webinar provides an overview of DX evaporators and how to model them in Xist and Xace, including what has changed in Xchanger Suite 7....
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HTRI investigated condensation of a water/octane mixture outside a plain tube bundle. Tests were conducted in the Low Pressure Condensation Unit (LPCU) at three different vacuum pressures and five different vapor inlet flow rates. Almost all of the measured compositions varied from the azeotrope composition. High-speed videos for each case show a...
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Condensation data were recently collected in the Low Pressure Condensation Unit (LPCU) using hydrocarbon mixtures. This recent set of data wraps up a multiyear research project to study shellside condensation under vacuum conditions. This webinar will focus on the latest results collected with hydrocarbon mixtures. High-speed videos are shown along with...
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Component: Xace Applicable to: All supported versions (versions 7.3 and 8) Date posted: 15 April 2019   Air-cooled heat exchangers are typically designed for operation with all fans on. A bay with two, three, or four operating fans is commonly identified as 2×50%, 3×33%, or 4×25% fans, indicating that each operating...
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Are you ready to build your first case in Xace? This webinar discusses the Xace interface, including how to navigate, use program options to model your unit, and get help. After the initial discussion on the Xace interface, the webinar works through an example, showing you how to input geometry, run...
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Component: Xace Applicable to: All supported versions (7.3 and 8) Date posted: 4 March 2008 Last updated: 25 March 2019   Air-cooled heat exchangers are typically designed for operation with all fans on. For a bay with two, three, or four operating fans, this operation is commonly indicated as 2×50%, 3×33%...
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Component: Xace Applicable to: All supported versions (versions 7.3 and 8) Date posted: 15 January 2008 Last updated: 22 January 2021 The Xace Output Summary includes the calculated driver power (or the power consumed by each fan motor) on line 41. But how does Xace calculate this value? The basic definition for...
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During winter or in turndown conditions when full design duty is not required, air-cooled heat exchangers commonly run with one or more fans off. Xace® models this operation by allowing users to specify an inlet flow maldistribution. This article provides guidelines for modeling fans-off operation in Xace and describes a computational...
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