Preliminary experimental study of single screw expander prototype
Preliminary experimental study of single screw expander prototype
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单螺杆膨胀机样机初步实验研究
DOI：
10.1016/j.applthermaleng.2011.01.019
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发表时间：
2011-12
影响因子：
6.4
通讯作者：
Yu, Jian
中科院分区：
文献类型：
--
作者：
Wang, Wei;Wu, Yu-ting;Ma, Chong-fang;Liu, Lin-ding;Yu, Jian
低温热源的高效热转换是节能减排的关键问题，特别是在余热回收和可再生能源利用领域。目前，低温火电的技术瓶颈是缺乏合适的原动机。单螺杆作为通用机械的核心部件，具有主螺杆受力均衡、泄漏小、噪音低、振动小、寿命长等优点。如果将单螺杆技术应用到膨胀机领域，与手枪式膨胀机、涡旋式膨胀机、双螺杆膨胀机等相比，有可能获得更高效的原动机。为了验证样机的性能，进行了功能实验。本文以压缩空气为工质，在不同进气流量、不同湿度、恒扭矩、恒转速条件下完成了样机的性能测试。实验数据表明，在进口压力0.6 MPa、转速2850rpm的条件下，输出功率为5 kW，排气温度为-45 ℃，进出口温差约为62 ℃。试验结果还表明，单螺杆膨胀机具有良好的部分负荷特性。通过对实验数据的分析，我们发现样机的绝热效率不高，可能是由于润滑不良造成的。润滑问题将在下一步工作中考虑。
Efficient heat conversion of low temperature heat source is a key problem for energy saving, especially in the fields of waste heat recovery and renewable energy utilization. At present, technical bottleneck for low temperature thermal power is lack of suitable prime mover. As the core component of general machinery, single screw has many good features, including balanced loading of the main screw, low leakage, low noise, low vibration and long working life, etc. If single screw technology is applied to the field of expander, more efficient prime mover would be possibly obtained, compared with pistol expander, scroll expander and twin screw expander, and so on. In order to verify the performance of the prototype, the function experiment was made. In this paper, compressed air was used as working fluid and performance test for the prototype was finished at conditions including different intake flow, different humidity, constant torque, and constant rotational speed. From the experimental data, it is shown that the power output is 5 kW, exhaust temperature is −45 °C, difference between the import and export is about 62 °C, in the conditions of inlet pressure at 0.6 MPa and rotational speed 2850rpm. The test results also show that the single screw expander has good part load characteristics. From the analysis of experimental data, we found that adiabatic efficiency of the prototype is not so high probably because of poor lubrication. The lubrication problem will be considered in the next work.
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作者：
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