Double Pipe Heat Exchanger Design consists of one pipe placed inside another pipe of a larger diameter with appropriate fittings to guide the flow from section to another.  The fluid flows in the inner pipe is the tube side and in exchange another fluid flows in the outer pipe (annulus). Double Pipe Heat Exchangers are also known as Hairpin Heat Exchangers. They are commonly used in industry.

This product is designed to do thermal calculations and design for this type of heat exchangers.

Double Pipe Heat Exchanger Design (DHex) Software Features

1. Support S.I Units and English (U.S) Units of measurement.
2. Units converter includes 23 measurements units with 200-unit conversion
3. Ability to import properties to Hot/Cold sides from Microsoft Excel.
4. Add your own Nusselt correlation
5. Save/Load results
6. Ability to calculate unknown Cold or Hot side temperatures. Unknown exit temperatures on both sides or any two temperatures on both sides
7. Unknown Flow rate on either hot or cold side
8. Perform thermal analysis for bare tube double pipe (hairpin) heat exchangers.
9. Perform thermal analysis for finned tube double pipe (hairpin) heat exchangers.
10. Choose from Counter Current or Co-Current Flow arrangement
11. Choose from Series arrangement or Series-Parallel arrangement.
12. The software will also tell you the location of Hot/Cold fluids within the heat exchanger (Inner Pipe or Outer Pipe).
13. Select from different correlations to calculate Cold/Hot side heat transfer coefficient. Also, the ability to adjust Nusselt number if you do have a different correlation.
14.Calculate the Area, Flow area, Length, Log Mean Temperature Difference, Number of Hairpins, Unknown Flow rate. The software can also plot a temperature profile for hot side and cold side as well as identify temperature cross.
15. Calculate the scale resistance (dirt factor), Equivalent Diameter.
16. Calculate Inner Pipe/Outer Pipe (Annulus) side Reynolds, Nusselt numbers & Prandtl Numbers.
17. Duty Calculation, Clean and Design Overall heat transfer coefficient calculations
18. The ability to define the Duty also the ability to define the heat transfer coefficient on either side.
19. Inner Pipe/Outer Pipe (Annulus) velocities and Mass velocity calculations
20. Number of Transfer Units and Thermal Capacity ratio calculation.
21. Clean and Fouled Fin Efficiency calculations for finned tube heat exchanger.
22. Pressure drop calculations & Entrance and Exit losses.
23. Pumping power calculation. 24. Export Results summary to Microsoft Excel Engineering Datasheet format. Save/Load results. Generate/Print a summary of results
25. Display multiple cases in results grid
26. Export Results summary to .rtf file format that can be opened in Microsoft Word

Included databases
27. Estimate the Physical properties of pure components for more than 1450 fluids; the database has the ability to estimate Thermal Conductivity, Density, Heat Capacity and Viscosity. The database also included critical properties, boiling and melting points and come as a standalone interface but easily integrated with the software.
29. User database functions to allow user to add/delete fluids, pipe sizes and heat transfer coefficients and load to hot/cold side (Empty database!).
30. Fouling factors

• Single phase fluid operations with exception to steam which is supported.
• Single tube units, multi tubes are not supported.

Double Pipe Heat Exchanger


Click here to download the demo version of the product.

Please also note that the demo version of this software will only operate with set examples which are restricted in our demo version.  The full version of this product does not have any restrictions.

We don’t offer a fully working demo version.

Please note: the demo version may not necessary contain all latest features, To check the latest update history of this software please click here

Screen Shots Links

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Latest Demonstration Video

Features Video

General timeline:
00:00:00 General Features
00:01:46 Importing physical properties from software database file
00:03:00 Units of measurement and Units Converter
00:04:12 User Databases
00:05:47 Nusselt number correlations add your own correlation!
00:07:01 Importing physical properties from Microsoft Excel

Example video (Oil exchanger)

General timeline:
00:00:00 Example
00:02:53 Temperature Profile
00:08:02 How to add a heat transfer coefficient correlation