A semismooth Newton method for variational in - equalities: The case of box constraints
A semismooth Newton method for variational in - equalities: The case of box constraints
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变分方程的半光滑牛顿法：盒约束的情况
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
C. Kanzow
中科院分区：
文献类型：
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作者：
F. Facchinei;A. Fischer;C. Kanzow
本发明的膨胀-压缩换能器用于将来自高压源的制冷剂流体膨胀到低压吸热换热器中，同时预压缩来自低压吸热换热器的相同流体流，并通过合适的导管式换热器输送到高压源的吸力侧。该装置包括：封闭用于限制制冷剂流体的腔室的主体、流体响应活塞，该活塞被设置为在腔室中振荡并将该腔室一端分为膨胀腔和另一端分为压缩腔、压缩腔中的返回弹簧控制，用于将活塞定位到初始启动位置；一种流体控制调节器，用于允许制冷剂流体进出膨胀室和进入压缩室，以及一种止回阀，用于允许制冷剂在压缩室中的压力超过止回阀时流出压缩室。该装置有效地提供流体响应活塞在腔室内的振荡运动，使制冷剂流体流同时在膨胀腔中膨胀和在压缩腔中压缩，并同时产生冷却效果和功输出。
The expander-compressor transducer of this invention is for expanding refrigerant fluid from a high pressure source into a low pressure heat absorbing heat exchanger while simultaneously precompressing the same fluid stream derived from the low pressure heat absorbing heat exchanger for delivery through suitable conduit heat exchangers to the suction side of the high pressure source. The device includes a body enclosing a chamber for confinement of refrigerant fluid, a fluid-responsive piston arranged to oscillate in the chamber and dividing the chamber into an expansion chamber at one end and a compression chamber at the other end, a return spring control in the compression chamber for locating the piston into the initial start-up position, a fluid control regulator for permitting flow of the refrigerant fluid into and out of the expansion chamber and into the compression chamber, and a check valve for permitting the refrigerant to flow out of the compression chamber whenever the pressure in the compression chamber overcomes the check valve. The device effectively provides oscillatory movement of the fluid responsive piston within the chamber, causing concurrently the refrigerant fluid stream to expand in the expansion chamber and to compress in the compression chamber, and producing simultaneously a cooling effect and a work output.