design of combined savonius darrieus wind turbine
In this project an attempt is made to utilize the advantage of Darrieus and Savonius rotors, to improve the efficiency of power conclusion. This combined wind turbine with a lift-type Darrieus rotor is providing main power, and a drag-type Savonius rotor is providing starting power. At low wind spee
2025-06-28 16:31:56 - Adil Khan
design of combined savonius darrieus wind turbine
Project Area of Specialization Electrical/Electronic EngineeringProject SummaryIn this project an attempt is made to utilize the advantage of Darrieus and Savonius rotors, to improve the efficiency of power conclusion. This combined wind turbine with a lift-type Darrieus rotor is providing main power, and a drag-type Savonius rotor is providing starting power. At low wind speeds the Savonius rotor starts rotating, pulling along with it the Darrieus rotor, through the free wheel. When the Darrieus rotor reaches its critical speed, it starts rotating at faster speed, decoupling itself from the Savonius rotor. Now for the same low wind speed, both the Savonius rotor and Darrieus rotors rotate at their own speeds, the output of which will be fed to a two input epicyclic gear box, so that an augmented output will be obtained from the gear box. The combined Savonius-Darrieus rotor can increase the wind turbine efficiency in low wind speed and also enable self-starting in Darrieus turbine.we are designing this turbine because it works on low wind speed while the horizental axis wind turbines work at high wind speed when the flow is laminar.so we will make a design which works at low wind speed just to produce power.
Project ObjectivesThe main objective of this project to design combined savonius and darrieus wind turbine to get maximum efficiency and generate maximum amount of power.First we will do the wind resource-assessment and after getting data we will design turbine and couple it with synchronous generator by using gear box to get maximum rpm and will generate sufficient energy.
we will analyze the behavior of turbine in wind tunnel where we can get results at differnt wind speed.
Project Implementation MethodThere are two main steps to make this turbine first one is designing on any software this will be done by collecting proper data by wind resource assessment of the city where this turbine will be installed. The wind resource assessment includes velocity of wind in different months of the year. after collecting the data we will design the air foil structure of the blades of turbine.The second part of our project includes fabrication which will be done in fab-lab and then we will couple a generator to generate electrcity by using gear-box.
Benefits of the Projectwe all know that renewable energies are a big demand these days our project is based on renewable energy and have multiple benefits.This project is beneficial for areas with low wind speed.Also it can be placed anywhere it does not require a high altitude for placement.it can be used for residential loads.we can generate power by placing it at highways.A hybrid system of solar and wind turbine can be made using this turbine to generate power for street light.this is economical and cheapest way to produce electrcity.
it can also be used for off grid applications.
it can be used as flour mills in remote areas
it can be used for signal lightning
Technical Details of Final DeliverableThere are some parameters which are necessary and help to design turbine are following.
- The swept area is the area through which the rotor blades of a wind turbine spin,swept area is defined as the power output of a wind turbine is directly related to the swept area of its blades. A=pi*D*H
- Tip speed ratio:is defined as the ratio between the tangential speed at blade tip and the actual wind speed
- The chord is the length between leading edge and trailing edge of the blade profile
- The initial angle of attack is the angle the blade has regarding its trajectory, considering negative the angle
- that locates the blade’s leading edge inside theCircumference described by the blade path.
- The power the turbine takes from wind is calculated using the power coefficient.
- Cp= capture mechanical power by blades /power available in wind
- The number of blades has a direct effect in the smoothness of rotor operation. From various references it
- is conclude that two or three blades are more suitable for vertical axis wind turbine.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Total in (Rs) | 65000 | |||
| generator | Equipment | 1 | 20000 | 20000 |
| angle iron | Equipment | 10 | 1000 | 10000 |
| steel shaft | Equipment | 1 | 9000 | 9000 |
| fabric blade | Equipment | 5 | 3000 | 15000 |
| gear system | Equipment | 2 | 3000 | 6000 |
| Console system | Equipment | 1 | 5000 | 5000 |