Pneumatic drives have been widely u

Pneumatic drives have been widely used alongside with
electrical machines. They have many distinct advantages
compared to electrical drives, such as simple in structure,
safe in hazard operating conditions and low-cost in
manufacturing. Its major weakness is low energy efficiency
and it is reported that only less than 30% efficiency is
achieved in most cases [1, 2]. With the expansion of the
usage of compressed air and the rapid development of
multi-scale Compressed Air Energy Storage (CAES), the
attention to pneumatic drives increases in recent years, due
to searching for efficient energy conversion devices to
convert compressed air energy to mechanical energy and in
turn electrical energy.
The scroll expander has gained big attention recently as it
has a higher ability of energy conversion than traditional
pneumatic drives, such as pneumatic cylinders and vanetype
air motors [3, 4]. It has been successfully applied to
build hybrid compressed air Uninterrupted Power Supply
(UPS) and Micro Combined Heat & Power (Micro CHP)
systems, in which scroll expanders are used to drive
electrical generators for electricity generation [5]. In
addition, the researchers have investigated the possibility
and the feasibility of using the scroll expander for
recovering the exhaust energy via the different systems,
such as a combination of a scroll expander and a
compressor for recycling work in a fuel cell system [6], the
exhaust compressed air energy recycling from traditional
pneumatic actuating systems and the post-combustion gas
energy reuse from vehicles [7, 8].
From the study at the University of Warwick, it is noticed
that the energy efficiency of scroll expanders drops with the
compressed air supply pressure decreases in the relatively
low supply air pressure situations, which will definitely
affect the expander operation and performance especially in
exhaust energy recycling applications. Through the initial
study at Warwick, it is found that the main reasons resulting
to such phenomenon are the friction from the movement of
scroll mechanisms and the air leakage between different
pneumatic scroll expander chambers. To solve this issue,
one method is to modify/redesign the scroll expander which
can provide the driving force not only from compressed air
energy when the low compressed air supply pressure is in
use. The method can overcome or reduce the negative effect
of scroll expanders from the air leakage and the friction.
This paper presents an innovative permanent magnetic
scroll expander which has potential to improve the
performance and the energy efficiency of scroll expanders,
especially for the applications in low compressed air supply
pressure situations. The paper starts from the study of the
scroll geometry and the thermodynamic process of standard
scroll expanders. The methodology to determine and to
install the magnetic materials into scrolls for generating the
extra useful force is then described. The magnetic field
between magnetized scrolls and the resultant driving torque
to the expander are analysed. The simulated result is
discussed at the end.

結果 (中文) 1:

气动驱动器有与广泛用于旁边电机。他们有许多突出的优点相对于电气传动，结构简单、 等在危险工况安全和低成本在制造。其主要弱点是，能源效率偏低而且据报，只有少于 30%的效率在大多数情况下，[1，2] 取得。随着扩大使用压缩空气和快速发展多尺度压缩空气能源储存 （CAES）注意到气动驱动器适当增加在最近几年，寻找到有效的能量转换装置在与机械能相互转换压缩空气能源把电能。涡旋式膨胀机取得了大的关注，最近因为它具有较强能力的能量转换比传统气动驱动器如气动缸和 vanetype气动马达 [3，4]。成功地应用于建立杂交压缩空气不间断电力供应(UPS) 和微型热电联产 （微型热电联产）系统，用哪个滚动膨胀到驱动器发电机发电 [5]。在另外，研究人员已经调查了可能性和使用为涡旋式膨胀机的可行性通过不同的系统，排气能量回收如涡旋式膨胀机的组合和压缩机回收工作在燃料电池系统 [6]排气回收从传统的压缩空气能源气动驱动系统和燃烧后气体能源循环利用从车辆 [7，8]。从在沃里克大学的研究，它被注意涡旋膨胀机的能源效率下降与压缩空气供应压力跌幅相对低电源空气压力情况下，一定会影响气轮机运行和性能尤其是在排气能量回收应用程序。通过初始研究在沃里克，它是发现，造成的主要原因解释这种现象是从运动的摩擦滚动机制与之间不同的空气泄漏气动涡旋膨胀机分庭。为了解决这个问题，一种方法是修改设计涡旋式膨胀机的可以提供不仅从压缩空气动力在低的压缩空气供应压力时的能量使用。该方法可以克服或减轻负面影响涡旋膨胀机从空气泄漏和摩擦。本文提出了创新的永磁滚动膨胀机，具有潜力提高性能和能效涡旋膨胀机尤其是对在低压缩空气供应中的应用压力的情况。本文从研究入手滚动几何和热力过程的标准滚动膨胀剂。确定方法和将磁性材料安装到卷轴的生成然后描述额外有用的力量。在磁场中磁化的卷轴与驱动力矩的合力对膨胀机进行分析。模拟的结果是在结束讨论。

結果 (中文) 3:

气动驱动器已广泛应用与
电机。他们有许多明显的优点
电气传动等相比，结构简单，操作条件及在危害

制造低成本的安全。它的主要缺点是能量效率低
和据报道，只有不到30%的效率，在大多数情况下实现
[ 1，2 ]。
的扩张压缩空气用量和
多尺度压缩空气能源储存（CAES）的快速发展，气动驱动器的增加近年来由于
注意，
寻找有效的能量转换装置将压缩空气能量
机械能和电能

转。涡旋膨胀机获得了很大的关注因为它
有较高的能量转换比传统
气压传动，如气缸，叶片式气动马达
[ 3，4 ]。它已成功地应用于
构建混合压缩空气的不间断电源（UPS）和微观相结合
&热功率（微CHP）系统中涡旋膨胀机
，用来驱动发电机发电
[ 5 ]。
除了在，研究人员调查的可能性
并用涡旋膨胀机回收排气能量为
通过不同系统的可行性，如结合
涡旋式膨胀机和
在燃料电池系统[ 6 ]的工作循环压缩机，压缩空气能量回收尾气的

从传统的气动驱动系统和燃烧后气体
从车辆[ 7，8 ]能源再利用。在华威大学的研究发现
，涡旋膨胀机
，滴用压缩空气供应压力下降
相对
低供气压力情况下的能源效率，这必将影响扩张器
操作和性能尤其是
排气能量回收应用。通过初始
研究在沃里克，发现这种现象产生的原因主要是来自

滚动机构运动和不同
气动涡旋膨胀机室之间的空气泄漏摩擦。为了解决这个问题，一种方法是
修改/重新设计涡旋膨胀机的驱动力从
可以提供压缩空气
不仅能量较低时，压缩空气供应压力在
使用。该方法可以克服或减少涡旋膨胀机的空气泄漏和摩擦的负面效应

。本文提出了一种新的永磁
涡旋膨胀机具有潜在的提高性能和涡旋膨胀机
能源效率，特别是在低
压缩空气供应
应用压力的情况下。本文从几何和滚动的

涡旋膨胀机的标准热力学过程的研究。确定方法和安装到卷轴
磁性材料产生额外的有用的力，然后描述
。磁化卷轴和产生的驱动力矩的扩张器
之间磁场
分析。模拟结果
讨论结束。