运行

An optimum operation model is provided to determine reference states of condenser system, which can calculate energy loss values of condenser system in variable conditions, and can be used to diagnose troubles of condenser system.

提出了凝汽器优化模型和确定凝汽器运行的基准工况的方法，给出了变工况下凝汽器系统能量损失值的计算方法，可用于凝汽器系统的运行优化和故障诊断。

The dual-piston valve comprises a valve housing having a pair of piston operation spaces defined therein and a pair of pistons disposed in the piston operation spaces of the valve housing such that the pistons can be vertically moved to open or close inner and outer outlet ports formed at a cylinder.

该双活塞阀包括：阀壳，其中限定有一对活塞运行空间；以及一对活塞，其设置在阀壳的活塞运行空间中，以使活塞能垂直移动以打开或关闭在气缸处形成的内出口和外出口。

The former concerns whether the valves operate normally, and the latter is not only related to the capability of headstock gear and valve structure, but also related to the reliability and flexibility of valve's operation.

前者关系到输水阀门能否正常运行，而后者不仅关系到阀门启闭机的容量和门体结构，而且涉及阀门运行的可靠性和灵活性。

The conveyed medium can't be leaked outside. Thus it will not cause the environmental pollution and human body safety dangerous while exhausting the toxin and flammable or corrosive medium. 5、No electricity. It's safe and reliable while using in the flammable and explore places. 6、It can be soaked in medium. 7、It's convenient to use and reliable to work. Only open or close the gas valve body while starting or stopping. Even if no medium operation or pausing suddenly for long time because of accident matters, the pump will not be damaged caused by this. Once over-loading, the pump will automatically stop and possesses the self-protection function. When the load recovers normally, it also can start automation. 8、Simple structure and less wearing parts. This pump is simple in structure, installation and maintenance. The medium conveyed by the pump will not touch the matched pneumatic valve and coupling lever etc. not like other kinds pumps, the performance will drop down gradually because of the damages of rotor, gear and vane etc. 9、It can transmit the adhesive liquid (the viscosity is below 10000centipoise) 10、 This pump needn't the oil lubricant. Even if idling, it has any influence to the pump. This is a characteristic of this pump.

所以抽送有毒、易挥发或腐蚀性介质时，不会造成环境污染和危害人身安全； 5、不必用电，在易燃、易爆场所使用安全可靠 6、可以浸没在介质中工作 7、使用方便、工作可靠、开停只需简单地打开和关闭气体阀门，即使由于意外情况而长时间无介质运行或突然停机，泵也不会因此而损坏，一旦超负荷，泵会自动地停机，具有自我保护性能，当负荷恢复正常后，又能自动启动运行； 8、结构简单、易损件少，该泵结构简单，安装、维修方便，泵输送的介质不会接触到配气阀，联杆等运动部件，不像其他类型的泵因转子、活塞、齿轮、叶片等部件的磨损而使性能逐步下降； 9、可输送较粘的液体（粘度在1万博以下）； 10、本泵无须用油润滑，即使空转，对泵也无任何影响，这是该泵一大特点

Comprehensive management by vacuum tight so that condenser running in top condition for the unit to create something to conditions for economic operation, but also won the economic benefits for the company.

通过真空严密的综合治理使凝汽器保持在最佳状态下运行，为机组经济运行创造有得条件，也为公司赢得了经济效益。

With the established model, the optimization model of condenser is proposed to determine the best vacuum value of condenser and energy loss resulted by deviation of some main operation parameters, reduce the energy loss by optimize the controllable parameters.

在此基础上，建立发电功率与凝汽器真空的优化模型，确定热力系统各主要参数对汽轮机功率的影响以及凝汽器真空的运行应达值，以机组的最优运行为目标，优化可控参数，达到降低能耗的目的。

Research on multi-objectives optimal operation of the hydropower station with two-row placed units is studied with an example of Lijiaxia hydropower station. Stability characteristics and operation efficiency of the two-row placed units is studied by real test and analysis. Optimal operation mode is also proposed.

以李家峡双排机水电站为实例，开展双排机水电站综合优化运行研究，通过真机测试分析，得出了李家峡双排机水电站机组稳定性特征和机组效率变化规律，提出了双排机水电站优化运行模式。

The running quality of the wind tunnel power shaft system has a decisive influence on the efficiency and performance. With increase of the runtime of the shafting, rotor parts have inevitable mass eccentricity, which obviously strengthens the coupling function of torsional and bending vibration.

风洞动力轴系的运行品质对风洞的效率和性能有决定性的影响，随着轴系在役运行时间的增加，转动部分多数会有质量偏心现象出现，这使得轴系的扭转振动与弯曲振动的耦合作用明显增强。

Guangxi Yantan turbine diameter 8m 90s in the 20th century in operation, mainly due to the hydraulic design and manufacturing quality Runner and other reasons, put into operation a serious vibration, cracks, vibration tube into the door crack, power generation Floor Vibration machine layer. 10 years of annual repair cracks, cavitation, multiple blade line has been restored can not be guaranteed, for the more radical change in this situation, has on one desktop PC upgrades, replacement of the old wheel, replaced by a Taiwan new designs, new technology a new wheel, troubled years of generating station floor floor vibration problems are basically solved.

广西岩滩水电站直径达8m的水轮机在20世纪90年代投入运行，主要是由于水力设计和分瓣转轮制造质量等原因，投入运行后振动严重，裂纹产生，尾水管进入门振裂，发电机层楼板振动。10年来年年修补裂纹、空蚀、多次修复后叶片型线已无法保证，为较彻底的改变这种状况，已对其中一台机进行升级改造，更换了老转轮，代之以一台新设计、采用新工艺的新转轮，困扰电站多年的发电机层楼板振动问题得到基本解决。

In this paper,the problems of the large traveling grate stocker hot water boilers applied at the present time are investigated and analyzed,and the main designing principles for the large traveling grate stocker hot water boilers are proposed,according to the characteristics of the central heating system operation.

1引言由于采用热水供热系统具有采暖质量好、节能、运行安全、设备维护费用低等优点，热水供热系统目前已经成为我国北方城镇集中供热的主体形式，同时也推动着热水锅炉技术的发展和进步，使其朝着大型化和多型化方向发展〔1，2〕。由于我国环境保护标准的限制并考虑到燃烧设备的运行可靠性，目前，我国绝大多数集中供热用热水锅炉是大型链条炉排热水锅炉。

They go to town. Would you just ask them?

他们在城里你能问他们吗？

Ossein pretreated for a2 weeks period exhibited the maximum% yield incase of bone gelatin, while the yield from intact skin was higher than that realized incase of de-scaled skin.

预处理时间达2星期的骨胶原表现出最高的骨明胶百分产量，然而从未处理鱼皮中得到的产率比去鳞的鱼皮得到的要高。