Category: AIR COOLED
-
Identify Current Version and Save in a Different Version of Xchanger Suite
January 16, 2017
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....
Visit
-
Modeling Plugged Tubes in Xace
January 16, 2017
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....
Visit
-
Is My Design OK? Applying API 661 Annex C to Air Cooled Heat Exchanger Designs with Viscous and High Pour Point Fluids
January 15, 2017
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....
Visit
-
Is My Design OK? Modeling Air Cooled Condensers with Subcooling
January 15, 2017
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...
Visit
-
Research Update: Air-cooler Headers: Predicting Pressure Drop and Flow Distribution
January 15, 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....
Visit
-
AC-10 Study on Effects of Tube Pitch and Row for Air-Cooled Heat Exchangers: Data and Method Improvement
January 16, 2017
This report documents research on the effects of tube pitch and number of rows on heat transfer and pressure drop for air-cooled heat exchangers. Seven tube bundles were tested at isothermal and non-isothermal operating conditions with varied airside Reynolds numbers. Using the data from these tests, HTRI evaluated and improved existing...
Visit
-
Research Update: 2018 - Year in HTRI Research
February 28, 2019
This webinar highlights the accomplishments of HTRI Research over the past year and describes how HTRI members can benefit from these developments. We briefly discuss airside studies with our air cooler unit, vacuum condensation experiments with hydrocarbon mixtures, new phase change methods for plate heat exchangers, subcooling with shellside condensation, and...
Visit
-
TT-27 Modeling air-cooled heat exchangers with redundant fans
April 14, 2019
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...
Visit
-
Simulating air-cooler header and fan performance informs physical testing plans
June 05, 2019
Salem A. Bouhairie, Senior Project Engineer, Research Both tubeside and airside behavior affect the overall performance of an air cooler. Two concerns with air-cooled heat exchanger (ACHE) operation are two-phase process-side maldistribution in headers and misrated airside fan performance. At HTRI’s Research & Technology Center (RTC), we are developing plans to...
Visit
-
TechTip: Running Air Coolers with a Reduced Number of Fans
July 02, 2019
Air coolers use fans to drive the cooling air over the tube bundle. The number of fans in operation may be less than the total number of fans installed, such as in scenarios where operations are winterized or where extra fans are installed for redundancy. This webinar will look at how...
Visit
-
Research Update: Natural-draft Testing on Air-cooled Heat Exchangers
December 12, 2019
To ensure reliable data collection, HTRI always seeks to improve test methods and incorporate innovative techniques. Recently installed at the Research & Technology Center, the Air-cooled Unit (ACU) has motivated us to develop better ways of collecting airside measurements for both forced- and natural-draft testing. Accurate measurements for natural-draft (fans off)...
Visit
-
TT-3 Model fan-off operation in Xace
January 26, 2017
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%...
Visit