سال انتشار: ۱۳۹۰
محل انتشار: اولین کنفرانس بین المللی و سومین کنفرانس ملی سد و نیروگاههای برق آبی
تعداد صفحات: ۱
Dipl. Wirt.-Ing – Vice-President Startup-Projects and Development Of new Business- Germany
Traugott Ulrich –
Energy efficiency and energy recovery are known as subjects to be treated with great care while selecting pumps for any industrial, hydraulical applications. To select apump correctly, all circumstances which could occur in operation are to be taken into consideration. This includes the unlikely event of reverse operation of a pump as wellas part load and overload operation. Talking about reverse operation of a pump, one can observe that pump as turbine is something workable, the same time something totake care about in terms of safety and reliability of fluid handling systems.Energy recovery by means of operation of pumps as turbines forms the subject of this survey. From an engineering point of view, any observations about operations ofpumps / turbines are subject to hydraulic and mechanic properties of pumps and turbines, the differences between the two of them as well as the properties in common.It is mandatory to carry out a borderline survey in order to come to know what willbecome effective while changing the type of operation. What kind of stress will beapplied to the hydraulic and mechanic most important parts of the pumps / turbines,and how could design options improve performance. Many of fluid handling systems are designed to provide a certain flow and head at aparticuliar point of use. Quite often, the systems are subject for modifications, and hence there is a second duty point to be taken into consideration. This leads todifferent load on the pump / turbine, which will definitely have an influence on the overall performance of the hydraulic system.Provided, the system is designed to suit the requirements at a particular point, there will be energy left, which has be treated somehow. Quite frequently, throttles are inuse to cut of excess energy. Unfortunately, throttles will have an influence on the fluid handling system in a way to decrease efficiency. How could that problem, to operatethe system efficient and the same time effective, be achieved?