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Published on: April 6, 2017
Performance evaluation of a novel liquid nitrogen cryoprobe
1Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200030, P R China.
Summary
A new detachable liquid nitrogen cryoprobe offers improved cooling performance and safety. Its innovative design shortens precooling times, making it a cost-effective advancement in cryoprobe technology.
Area of Science:
- Biomedical Engineering
- Materials Science
- Thermodynamics
Background:
- Cryoprobes are essential for various medical and scientific applications requiring precise temperature control.
- Existing cryoprobe designs often face limitations in maneuverability, safety, and cost-effectiveness.
Purpose of the Study:
- To develop and evaluate a novel, detachable liquid nitrogen cryoprobe with enhanced performance.
- To assess the impact of a new vapor-liquid separator on freezing capacity and operational efficiency.
Main Methods:
- Designed a detachable cryoprobe with modular components (inlet, handle, vapor-liquid separator, heat transfer segment).
- Integrated a novel vapor-liquid separator to optimize liquid nitrogen flow.
- Measured cryoprobe wall temperatures across different media (air, gel, brine) under varying pressures (0.3-0.6 MPa).
- Compared performance metrics against existing cryoprobe models.
Main Results:
- The novel cryoprobe demonstrated significantly reduced precooling times.
- Achieved superior cooling performance compared to conventional cryoprobes.
- Identified film boiling as the dominant heat transfer pattern within the probe.
- Estimated heat flux from surrounding environments (air, brine).
Conclusions:
- The detachable, flexible construction enhances maneuverability, safety, and cost-effectiveness.
- The improved vapor-liquid separator design boosts freezing capacity.
- The developed cryoprobe represents a significant advancement in cooling technology, with potential for further optimization.
