膨胀功

辐射传热时活塞式气缸中加热气体的最大膨胀功加热炉废气的热电偶

Maximum expansion work of heated gas inside a cylinder with a piston and radiative heat transfer

膨胀功直接为压缩机所利用，因而，比蒸气压缩式空调器具有更高的制冷系数。

It could obtain higher coefficient of performance ( COP ) than that of traditional vapor compression air conditioning because the expansion work can be used in the compressor .

对用于回收膨胀功的CO2膨胀机的进气控制阀进行了研究。

The inlet control valve of CO_2 swing rolling piston expander is investigated .

为减小CO2跨临界循环系统节流部分的膨胀功损失，提高系统性能，可在小型制冷系统中采用喷射器代替节流阀，部分回收工质从高压到低压过程的膨胀功。

An ejector should be adopted in some low cooling-capacity refrigerating systems instead of a throttle valve to recover some high-pressure potential power and reduce the irreversible energy loss of throttle process for improving the energy efficiency ratio ( EER ) of the CO_2 system .

为了解释低温下制冷功率与膨胀功的非比例关系而从热声理论出发，对G-M制冷机进行了热力分析，阐明了膨胀功和制冷功率的关系及与极限制冷温度相关的因素。

The thermodynamic aspects are analyzed based on thermoacoustic theory . In the conclusion , the relationship between the expansion work and cooling power , the relative factors for lowest temperature are described .

大型燃气轮机冷却空气量分配及透平膨胀功计算方法研究

Study on cooling air allocation and expander power calculation of large scale gas turbine

通过保留能量方程中的变体积项考虑了由于控制体体积的改变所输出的膨胀功。

The expansion work resulted from variation of control volume was taken into account by reserving the variable volume term in energy equation .

多变指数可以通过实验测定的煤体温度来计算，吸附瓦斯和游离瓦斯的膨胀功可以利用多变指数计算。

The polytropic index can be calculated according to the experiment data of coal temperature , the free gas expansion work and adsorbed gas work can be calculated using polytropic index .

运用工程热力学的理论计算组成物料的各气体、汽体、液体于绝热过程中对外所作的膨胀功、爆沸功。

According to the engineering thermodynamic theory , the inflating work and ebulliency work exerted by the materials composed of liquid , vapour and gas during the adiabatic process are calculated .

结果表明，采用二级压缩并回收膨胀功可以大大提高系统的性能；只采用两级压缩而不回收膨胀功，对系统的性能并没有明显的改善；

The simulation results show that the two stage compression cycle with expansion work recovering can greatly improve the system performance , while without expansion work recovering it will do nothing good .

通过对膨胀机回收功的实验研究，给出了影响CO2膨胀机运行效率的因素，这对提高膨胀机以及循环系统的效率有着重要作用。

Through the experiments on recycle power of the expander , factors of CO 2 expander efficiency were deducted . It is very important for improving the efficiency of expander and cycle .

根据塑性力学的上限定理，严格地导出了考虑膨胀应力作功的功能平衡方程。

Based on the upper bound theorem in plasticity , a new energy-work balance equation has been strictly derived including the work rate done by expansive stress .

根据上述，我们可能得出一个结论：气体膨胀时能作功。

From what is mentioned above can arrive at the conclusion that gas can do work while expanding .

而且分别对于亚临界区和两相区探讨了膨胀过程中膨胀功的来源，为膨胀机的设计提供了理论指导。

Furthermore , the source of expansion power is discussed both in the subcritical region and in two-phase region , which will provide academic instruction for the expander design .

根据煤层气体突出的热力学模型，作者提出煤层气体内能、膨胀能和膨胀功具有不同的概念和物理意义的观点。

According to the thermo-dynamic model of coal-seam gases outburst , the author points out that there are different concepts and physical significance of internal energy , expansion energy and expansion power of coal-seam gases .

它是利用高炉炉顶煤气的余压，将煤气导入透平膨胀机，通过受压气体膨胀作功将压力能转化为机械能，驱动发电机发电的能量回收装置。

Itductsthe coal gas into the turbine expander by using the top gas press recovery , converts pressure into the machine energy , and drives the generation to generate electricity .

对原实验装置采取了更换涡旋膨胀机、润滑油和改变测量膨胀功方法等优化措施。

Optimizing the former experimental installation , including of changing scroll expander , lubricating oil and the measuring method of the output of the expander work , the experimental study verified the theoretical results .

实验结果也表明了膨胀机存在最佳转速使膨胀机的输出功达到最大。

The experiments indicate the conclusion that there is the optimal rotate speed for the maximum output of expander .

对膨胀机的膨胀过程进行分阶段研究，膨胀机膨胀功来源不同，膨胀回收功将受进出口状态的影响。

Studying the expansion process phased , the expansion work derived differently in different stages , and expansion work influenced by condition of the exit and entrance of the expander .

但是不得不看到的是，将逆循环装置中取代节流阀的膨胀机应用于大中型制冷与热泵机组时，可回收的膨胀功比较可观。

But what have to see is that the recoverable work is substantial when a expander , in a medium or large refrigeration and heat pump units , has been used to replace the throttle in a conventional reverse cycle .