CRTech tools are routinely used to model the complexities
of Joule-Thomson or JT cooling systems, as either blow-down systems or
closed cycles (e.g, Linde-Hampson). Because
they provide compact and vibration-free cold heads,
such coolers are popular for cooling of sensors and
electronics including cryogenic and MEMS (microcooling)
combination of SINDA/FLUINT
and Sinaps® is used
for system-level schematics, or SINDA/FLUINT plus FloCAD®
(an optional Thermal Desktop® module) for detailed
modeling of cold heads and other heat exchangers.
features relevant for analyzing JT cooling systems include:
and saturation dome properties readily available for
the most commonly used fluids including hydrogen,
helium, nitrogen, argon, CO2, methane, and propane.
Additional and custom fluids (e.g., mixed gas coolers)
descriptions can be created by CRTech or the user.
heat exchangers in cold heads and in multi-stage coolers
(regenerators, recuperators, intercoolers)
analyses including tank blow-down and structural cool down
into the dome including two-phase heat exchange. See
also Two Phase Analysis.
complex control systems (PID etc.) applied to valves,
to parametric modeling and Advanced
Design Modules (optimization and sizing, automated
model calibration to test data, reliability and statistical
Joule-Thomson Cold Finger Design and Analysis
A sample model is available to illustrate the application of SINDA/FLUINT, Sinaps®, and Thermal Desktop®/FloCAD® to the modeling of the Joule-Thomson cycle. These examples demonstrate:
- JT cryostat analysis
- Modeling of gas labyrinth seals (even though they purposely leak in this application)
- Modeling of heat exchangers in general, at both the system and detailed levels
The models with documentation are available for download.
Click here to download an Overview of the JT Modeling Example
Click here to download JT Modeling Example
Sinaps Network of JT Model (click images for larger version)
FloCAD Geometric JT Model
Temperature Profiles During Transient Cooldown
also provides consulting and
custom software solutions to specifically meet your