Study on the Heat Transfer Analysis of Countercurrent Heat Exchanger in the Ultra-low Temperature 3He Separation System
The performance of counterflow heat exchangers is a key factor affecting the operational efficiency of ultra-low temperature 3He separation systems.At present,there are few comprehensive research and analysis cases on the heat exchanger of ultra-low temperature 3He separation system.Based on the traditional analysis method model of ultra-low temperature heat exchanger,this paper establishes a numerical analysis model based on energy conservation,and uses the control volume method to discretize and deduce the influence of the diameter of the counter current heat exchanger,liquid flow velocity,viscous heat and Kapicha thermal resistance on heat transfer on the exponential distribution element.The results indicate that flow velocity and pipeline diameter have a significant impact on viscous heat.In order to reduce the impact of viscous heat transfer on the performance of the heat exchanger,considering the actual operating conditions,the inner tube diameter should be set between 0.5～0.6mm.In the scheme with an inner diameter of 0.6mm,the flow rate range should be set between 40～60μmol/s.This research provides theoretical support for the design and optimization of ultra-low temperature 3He separation systems in the future.
3He separationcounterflow heat exchangerheat transfer analysis
万方数据
