Xace | HTRI
Design, rate, and simulate air coolers and economizer
A fully incremental program, Xace®contains HTRI’s latest pointwise methods based on extensive airside and tubeside experimental data. The heat transfer and pressure drop correlations are continually improved as a result of our ongoing research program.
And as part of HTRI Xchanger Suite®, Xace lets you quickly transfer applicable case data to other components like Xist® or Xhpe®. Xace is the industry standard for designing, rating, and simulating air-cooled exchangers and economizers.
- Xace models virtually any bundle arrangement.
- 3D incrementation calculates localized profiles for heat transfer and pressure drop.
- Detailed output reports provide overall and localized results.
- Extensive visualization tools show exactly how the exchanger is performing.
- Integrated physical property system eliminates requirement for additional property generation software. Xchanger Suite includes VMGThermo™, an extensive and rigorous fluid physical property generator, from Virtual Materials Group, Inc.
- Xace integrates with other engineering tools such as process simulators and mechanical design software, and CAPE-OPEN compliance ensures the broadest range of compatibility with other process simulation and physical property software.
- Both input and output support multiple unit sets, and custom unit sets can be defined.
- Forced/Induced draft, A-frame, and no fan configurations
- Horizontal, vertical, and inclined tubes
- Up to nine different tube geometries per bundle
- High-finned, low-finned, continuous-finned, stud-finned, and plain tubes
- Twisted tape and microfin tubeside enhancements
- Staggered and inline arrangements with any combination of transverse and longitudinal pitch
- Up to 99 tuberows per bundle
- Automatic or user-specified bundle layouts
- Single bundle, multiple bays, bundles in parallel, and multiple bundles/services options
- Split-pass headers with up to 24 tubepasses in each tuberow
- Rigorous heat transfer and pressure drop calculations performed using a 3D incrementation scheme to divide the exchanger into a large number of zones
- Flexible process input that allows specification of known process information (temperature, weight fraction vapor, and/or flow rate) with the program calculating missing information based on energy balance
- Three modes: rating (known duty and geometry), simulation (unknown duty and known geometry), and design (known duty and unknown geometry)
- Forced and natural draft calculations
- Effects of gray gas radiation can be switched on/off
- Effects of airside flow and temperature maldistribution
- Integrated vendor-supplied fan selection software
- Choice of HTRI research-based methods or ESCOA methods for high-finned tubes
- Automatic optimization of tuberows, bundle width, tubepasses, and airside face velocity
- Grid design option to vary geometry over user-specified ranges and step sizes
- Design constraints to prevent selection of undesirable designs
- Design grid to keep all alternative designs at your fingertips
- Extensive set of spreadsheet-style output reports that can be printed or exported to Microsoft® Excel®
- Summary reports with overall results in one or two pages
- Detailed reports for local profiles of all important parameters (temperature, pressure, heat transfer coefficients, heat flux, etc.)
- Standard API 661/ISO 13706-style specification sheet
- Selectable font sizes to make reports easy to view
- Customizable unit sets that can be changed dynamically as you work
- 2D and 3D scaled drawings provide visual confirmation of exchanger geometry
- 2D and 3D plots of local performance variables allow you to quickly spot any performance issues such as an internal temperature pinch
- Bundle layout drawing illustrating exact tube placement, including tubepass and tube type