The influence of the oscillating tube' s intensifying heat transfer on the performance of pressure wave re-frigerator are analyzed theoretically and studied experimentally in this paper. In the investigation, the air cooling is choosed and controlled in quantitative method, comparing with nature cooling. The result show that the total refrige-ration efficiency η would increase when turning up the environmental parameters α and β. The air cooling, as the method of intensifying heat transfer, would enhance refrigeration efficiency η8% ~10% much better than the na-ture cooling. Although the increasing effect on short tube would be obvious than the long tube, the promotion in re-frigeration efficiency would still be limited by many structural factors, i. e. the length of tube, medium flow, and has the upper limit value. The intensifying heat transfer of oscillating tube would make the refrigeration efficiency curve stability, expand the range of the pulsing frequency f corresponding to the higher refrigeration efficiency, and drease the optimum frequency 10~15Hz, making the the optimum refrigeration efficiency can be reached in a low rotation speed, which has great significance in reducing energy consumption and machine life.%采用理论与实验相结合的方法, 研究了强化压力波制冷机管外传热状况对其制冷效率的影响. 研究中采用定量方法对振荡管外壁首次以风冷方式强化传热, 对比自然对流条件下研究制冷性能的变化. 结果表明: 提高管外内温度比α和增大排气压力管内压力比β都能使总制冷效率η变大; 强化管外传热风冷却方法可使制冷效率提升8% ~10%, 效果明显优于原来的自然对流条件下制冷效率, 且短管效果明显好于长管, 但提升效果受管长、 介质流量等诸多因素影响且效果有限; 相比自然对流, 强化管外传热能在极大程度上稳定振荡管制冷效率曲线, 扩大压力波制冷机高制冷效率下平稳运行的射流频率f范围, 促使最佳射流频率f降低10~15Hz,并使制冷效率曲线峰值前移,从而以较低转速达到最大制冷效率,有效降低系统总能耗并提高机器寿命.
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