当前位置: X-MOL 学术Appl. Therm. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental investigation of an Organic Rankine Cycle Tesla turbine working with R1233zd(E)
Applied Thermal Engineering ( IF 6.4 ) Pub Date : 2020-04-07 , DOI: 10.1016/j.applthermaleng.2020.115293
Lorenzo Talluri , Olivier Dumont , Giampaolo Manfrida , Vincent Lemort , Daniele Fiaschi

The increasing interest in micro power generation is pushing the research world to find new solutions for increasing the efficiency of micro Organic Rankine Cycles. One of their main issues is the efficiency and the reliability of the expander. The Tesla turbine is an old/new expander, which has found a renewed interest in the last years because of the increasing appeal towards distributed micro generation, where this expander becomes competitive.

This peculiar technology seems adapted to micro generation in Organic Rankine Cycle thanks to its main characteristic, which is its simple structure that allows for high reliability and cheapness. In recent years, this expander has been analytically and numerically assessed when working with organic fluids. In this study, the experimental investigation of a Tesla turbine working with R1233zd(E) is presented. One of the main achievements was the assessment of the blockage effect of disks edges when the pressure drop through the machine is relevant as in case of Organic Rankine Cycles (e.g. higher than 3 – 4 bars), resulting into a relatively large amount of flow deviation through the clearances between the rotor disks package and the case, which implies a throttling effect thus resulting into a relevant performance loss. This effect was accounted by a model that well fitted the experimental data.

The achieved results confirmed the validity and the large applications potential of this emerging technology, especially in the fields of micro power generation, low inlet temperature and low expansion ratios. A maximum net power output of 371 W was obtained, proving the feasibility of utilizing Tesla turbines in Organic Rankine Cycle applications. A maximum shaft efficiency of 9.62% and a maximum adiabatic efficiency of 30% were achieved. The results and the developed model of disks edge losses effects represent an important step ahead, in physical depiction of the phenomenology, over the currently available literature, fundamental for the improvement of the design procedure of Tesla turbines for Organic Rankine Cycles.



中文翻译:

与R1233zd(E)一起工作的有机朗肯循环特斯拉涡轮的实验研究

人们对微型发电的兴趣日益增长,正推动研究界寻找提高微型有机朗肯循环效率的新解决方案。它们的主要问题之一是扩展器的效率和可靠性。特斯拉涡轮机是旧的/新的膨胀机,由于对分布式微型发电的吸引力越来越大,近年来,这种膨胀机引起了新的兴趣,在这种情况下,这种膨胀机具有竞争力。

由于其主要特征,这种独特的技术似乎适用于有机朗肯循环中的微型发电,其简单的结构可实现高可靠性和廉价性。近年来,在使用有机流体时,已经对该扩展器进行了分析和数值评估。在这项研究中,对使用R1233zd(E)的Tesla涡轮机进行了实验研究。其中一项主要成就是评估了通过机器的压降相关时,例如在有机朗肯循环(例如,高于3 – 4巴)的情况下,圆盘边缘的堵塞效果,导致相对较大的流量偏差通过转子盘组件和壳体之间的间隙,这意味着节流效应,从而导致相关的性能损失。

取得的成果证实了这项新兴技术的有效性和巨大的应用潜力,特别是在微发电,低入口温度和低膨胀比领域。获得的最大净功率为371 W,证明了在有机朗肯循环应用中使用特斯拉涡轮机的可行性。最大轴效率为9.62%,最大绝热效率为30%。磁盘边缘损失效应的结果和已开发的模型代表了现象学的物理描述,相对于现有文献而言,这是向前迈出的重要一步,这对于改进有机兰金循环的特斯拉涡轮机的设计程序至关重要。

更新日期:2020-04-08
down
wechat
bug