首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Clearance seal compressors with linear motor drives. Part 2: Experimental evaluation of an oil-free compressor
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Clearance seal compressors with linear motor drives. Part 2: Experimental evaluation of an oil-free compressor

机译:带线性电动机驱动器的间隙密封压缩机。第2部分:无油压缩机的实验评估

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摘要

Oil-free compressors are required for various applications, including cryocoolers and refrigeration systems that use compact evaporators. A novel low-cost moving magnet oil-free linear compressor is described here, and follows a companion paper on the linear motor system. The experimental apparatus to evaluate the thermodynamic performance of the linear compressor is comparatively straightforward, but the data analysis is involved, since key measurements have to be corrected for the phase response of the transducers. Harmonic fitting, using fast Fourier transform with zero-padding and minimisation algorithms, have been used for the voltage, current and displacement signals. This enables corrections to be made for the phase lag in the voltage, current and displacement measurements. The experiments using nitrogen, with a constant pressure ratio, show that the linear motor system under resonance achieves a high overall efficiency. For the design point, the motor efficiency is 74%, while for a pressure ratio of 3.0, the average overall adiabatic efficiency is 54% and the isothermal efficiency is 46%, all of which are within a reasonable range for a small compressor.
机译:无油压缩机需要用于各种应用,包括低温冷却器和使用紧凑型蒸发器的制冷系统。本文介绍了一种新颖的低成本动磁无油线性压缩机,该文件紧随有关线性电动机系统的论文。评估线性压缩机热力学性能的实验装置相对简单,但涉及数据分析,因为必须针对换能器的相位响应校正关键测量。电压,电流和位移信号已经使用了谐波拟合,该算法使用带有零填充和最小化算法的快速傅里叶变换。这使得可以对电压,电流和位移测量中的相位滞后进行校正。使用恒定压力比的氮气进行的实验表明,在共振条件下的线性电动机系统具有很高的总体效率。在设计点上,电动机效率为74%,而在压力比为3.0的情况下,平均整体绝热效率为54%,等温效率为46%,所有这些都在小型压缩机的合理范围内。

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