A New Ericsson Cycle Comprising a Scroll Expander and a Scroll Compressor for Power and Refrigeration Applications
A New Ericsson Cycle Comprising a Scroll Expander and a Scroll Compressor for Power and Refrigeration Applications
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包含涡旋膨胀机和涡旋压缩机的新型爱立信循环，适用于电力和制冷应用
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发表时间：
2004
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通讯作者：
Junsu Lee
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作者：
Young Min Kim;D. Shin;Junsu Lee
爱立信循环与斯特林循环非常相似，除了恒容蓄热过程被恒压蓄热过程所取代。埃里克森循环的效率与卡诺循环的效率相同，但与斯特林循环一样，在给定的压力、体积和温度的限制下，净有效功和传热量要大得多。在带涡轮机械的布雷顿循环中，随着压缩和膨胀级的增加，带中冷、再加热和再生的布雷顿循环将接近爱立信循环，热效率将接近理论极限（卡诺效率）。虽然爱立信循环经常被考虑，但它通常被放弃，因为涡轮机械的额外复杂性和需要许多额外的组件，阻碍了它的使用。但在轨道涡旋机作为一种正位移型机械中，由于涡旋包绕在工作空间中与流体接触的面积很大，在膨胀过程中可以对工作流体进行再加热，在压缩过程中可以有效地进行中间冷却。本文提出了由带加热系统的涡旋膨胀机和带冷却系统的涡旋压缩机组成的爱立信循环。同时，涡旋式膨胀机的均匀加热可以减小整个涡旋包层的差热膨胀，这是高温高压气体涡旋式膨胀机的关键问题。
The Ericsson cycle is very much like the Stirling cycle, except that the processes of constant-volume regenerative heat transfer are replaced by constant-pressure regenerative processes . The efficiency of the Ericsson cycle is the same as that of the Carnot cycle but, as in the Stirling cycle, the net available work and the quantities of heat transferred are much greater, for given limits of pressure, volume, and temperature. In the Brayton cycle with turbomachinery, as the number of compression and expansion stages is increased, the Brayton cycle with intercooling, reheating, and regeneration will approach the Ericsson cycle and the thermal efficiency will approach the theoretical limit (the Carnot efficiency). Although the Ericsson cycle is often considered, it is usually abandoned because the added complexity of the turbomachinery and the need for many additional components, discourage its use. But in the orbiting scroll machine as a positive displacement type of machinery, it is possible to reheat the working fluid in the process of expansion and intercooling in the process of compression effectively due to the extensive surface area of the scroll wrap contacting the fluid in the working spaces. In this paper, we propose the Ericsson cycle comprising a scroll expander with heating system and a scroll compressor with cooling system. And also, heating of scroll expander uniformly can reduce differential thermal expansion over the whole scroll wrap which is critical problem in the scroll expander for high-temperature and high-pressure gas.