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Basic knowledge of small hydro turbine

Author: source: date: 2019-10-14 10:05:13

In many areas, especially in underdeveloped areas, there are indeed problems of small hydropower stations with low investment and poor efficiency affecting the ecological environment.In order to understand the construction structure and working principle of small hydropower stations more clearly in the investigation work, we may first learn what the working principle of regular small hydropower stations is.

1.The parameters of hydropower station

francis turbine

The basic operating parameters of the turbine are water head, flow rate, speed, output and efficiency.

The water head refers to the difference between the water flow energy per unit weight of the inlet section of the turbine and its outlet section, expressed in “H”, and the unit is “m”.

The turbine flow rate refers to the volume of water flowing through the cross section of the turbine per unit time.

Turbine speed is the number of revolutions per minute of the turbine shaft.

The turbine output refers to the power output from the turbine shaft end.

Turbine efficiency is the ratio of turbine output to water outflow.

2.What is a bulb tubular turbine

tubular turbine

Power plant from influent to effluent direction basically is communicated in axial direction.If the buld turbine hydropower station water inlet outlet pipesare not turning,simple shape,flow channel to reduce the hydraulic loss,convenient construction.

Tubular turbine with high flow ability high specific speed,so in the head and power under the same conditions tubular turbine propeller diameter than about 10%;

Tubular turbine hydropower station has the advantages of compact structure,compared with the same specifications of Kaplan turbine to its relatively small size,can be arranged in the dam,cancel diversion system complex,reduce the workshop building area,reduce the amount of excavation and concrete plant,according to the analys is of revevant data,civil construction cost can save 20%-30%;

Tubular turbine for reversible pump turbine,the flow has no sharp corners,so that the pump and turbine can obtain good hydraclic properties.As for can with bidirectional power,bi-directional pumping and two-way drainage functions six tidal power sation.Therefore,it is suitable for the comprehensive development and utilization of low head water resource;

Tubluar hydropower station in general than the vertical axial flow type hydropower station construction period is short,fast effect.


3.The characteristics and scope of application of Francis turbines

Francis turbine21

For Francis turbine, the water flow enters the runner from the radial direction and flows out substantially in the axial direction. Francis turbines have a wide range of water heads, simple structure, reliable operation and high efficiency. It is one of the most widely used turbines in modern times. The water head is suitable for a range of 50 to 700 m.

4. The characteristics and scope of application of kaplan turbines

kaplan turbine 3

In an axial flow turbine, the water flow in the runner region flows axially, and the water flow changes from radial to axial between the vane and the runner.

The fixed paddle structure is simple, but its efficiency will drop sharply when it deviates from the design condition. It is suitable for power stations with low power and small head change. The general head range is 3~50m.The propeller structure is more complicated. It cooperates with the rotation of the blades and the rotation of the vanes to achieve double adjustment of the vanes and blades, which expands the output range of the high-efficiency zone and has better operational stability.

5.The characteristics and scope of application of Water bucket turbines(Pelton turbine)

pelton turbine

It works by impacting the jet from the nozzle against the rotor blade in the tangential direction of the circumference of the runner.The bucket type turbine need a higher water head.

Suitable for high head,small flow and flow changes in large runoff dropower station;

With the power plant investment is small,compact units structure characteristics;

Has the efficiency changes smoothly,opersting a wide range,even in the 15%-20% load is reduced efficiency;

Suitable for high head,small flow station in mountainous area;

A unit constatraction,simple restaction without cavitation condtion,the advantages of stable operation,less investment,constucion area.

6.The characteristics and scope of application of turgo turbines

Turgo turbine1

For a turgo turbine, the jet from the nozzle is at an angle to the plane of the runner (usually 22.5 degrees).This type of turbine is used in small and medium-sized hydropower stations, and the water head is suitable for use below 400m.

Chengdu Forster Technology is focused on design and manufacturing hydro turbines. The company was founded in 1956. Forster is the first Chinese state-owned enterprise and spares no effort to expand international market in 2013,At present, we have obtained orders in many water-rich areas such as Europe, Asia, South America, North America, etc., and as partners, we are qualified as long-term suppliers in many regions.

The capacity of hydro turbines is up to 5KW-300MW for a unit. The main hydro turbines are Turgo turbine,pelton turbines, francis turbineskaplan turbines ,bulb tubular turbines and other types of turbines.Foster also supplies governors, valves, transformers, monitoring systems, microcomputer integrated control panels and other equipment for hydroelectric power plants.

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Forster is strict to IEC international standard and national standard. It has CE,ISO,TUV,certificate. The hydro turbines have different types, specifications and reliable quality with characteristics of reasonable structure, reliable operation, high efficiency, standardized parts ,convenient maintenance.

After obtaining the certification of IS09001 quality management system, we still adhere to the rigorous work style formed in the turbine industry for many years, constantly and independently improve and perfect the management system of the enterprise, cherish and value the rich experience accumulated in the turbine production for decades, and constantly increase the technical force and Equipment input, focusing on the production, manufacture and installation of hydro-generator set equipment, auxiliary equipment of power station, production and manufacture of over-current components, repair and Capacity Upgrading of various power stations.

forster hydro turbine

 Forster always provides technical advice, services and the best technical solutions to customers based on their parameters. At the same time, it keeps offering after sale service for our product.

We always adhere to the principle of honesty and pragmatism, quality first, will be broad-minded, the attitude of life into our work, and strive to create a win-win situation for customers, enterprises and society. In the fierce market competition, we have always adhered to the details of success or failure, focusing on the achievement of excellence in the spirit of enterprise. In the friendly cooperation with customers at home and abroad, we have been pursuing the business philosophy of creating maximum value for customers.

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Q1, Which turbine should I choose?

 Please tell me the water head, flow rate, frequency, Total power you need

, voltage, on grid or off grid operation, we will propose a solution.

Q2, Can your factory provide all the equipment for hydropower generation?

Yes, we can provide you with turbines, hydro-generators, pressure regulators, turbine wheels, control panels, transformers, monitoring systems and more.

Q3, Can you do EPC for a hydroelectric power plant?

Yes, we can provide TURN-KEY and EPC services including measurement, design, manufacturing, construction, manufacturing, commissioning, inspection, maintenance runner replacement and refurbishment/upgrade/improvement/repair/refurbishment of turbines/generators including bearings, seals For parts and key parts, we will send technicians and workers to install equipment.

Q4,Is your company a trading company or a manufacturer?

We are a manufacturer of hydro turbine generators and started to promote the international market in 2013. Our factory is located in Sichuan, where China's water conservancy and hydropower is most developed. Welcome to visit our factory in China.

Q5, What is an acceptable MOQ?

 For this product, our acceptable MOQ is 1 set.

Q6,How long is the delivery time?

Delivery times range from 15 days to 6 months depending on the model you are purchasing.

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