DESIGN A POWER GENERATION SYSTEM WITH MODIFIED WIND THRUST PROPELLER AND DUEL LAYER COILING UNIT

DESIGN A POWER GENERATION SYSTEM WITH MODIFIED WIND THRUST PROPELLER AND DUEL LAYER COILING UNIT. Thesis/Project Group # 06

Rahman, Md. Arafat

(10-17921-3)

Habib, Md. Mahadi

(10-17857-3)

Hasan, Md. Mahmudul

(10-17912-3)

Biswas, Anupom

(10-17374-3)

Sakib Ahmed Lecturer, Faculty of Engineering American International University- Bangladesh

(Spring, 2013-2014)

© Faculty of Engineering, American International University – Bangladesh

DESIGN A POWER GENERATION SYSTEM WITH MODIFIED WIND THRUST PROPELLER AND DUEL LAYER COILING UNIT. Rahman, Md Arafat; Habib, Md Mahadi; Hasan, Md Mahmudul; Biswas, Anupom Abstract— We have designed a wind power generation system which contain a wind turbine and a generator. In this project we weren’t used the common generator which is available in the market usually. We modified our generator by making duel layer armature winding and using the magnets as rotor. By using this modified generator it is possible to induce more voltage form internal & external layer of armature winding at a time. We also tried to design a suitable wind propeller that rotate in low wind thrust easily.

1. Introduction

The world energy consumption is increased day by day. In this situation, we have to find out the alternative energy resources. Wind energy is one of the most effective renewable energy in the world. There are many ways to collect and use wind energy. Windmills, wind turbines, and sails all use to harness the energy created by the wind. Wind energy has the potential to provide mechanical energy or electricity without generating pollutants. In the case of a wind turbine, the wind turns the turbine, which generates electricity, a usable form of energy. This form is less efficient than using the energy directly, because energy is lost in the conversion and transmission process.[1] 2.

Prospect of wind energy in Bangladesh (Heading 2)

Bangladesh is situated in the latitude between 20°34'26°38'N and longitude between 88°01-92°4E. The country has a 724 km long coastal line along the Bay of Bengal. The peak wind speed occurs during the months of June and July. The wind energy resource of Bangladesh is not good enough (>7 m/s) [2], but They're many islands along the Bay of Bengal where the wind speed is quite high. For example, Kuakata, Sandwip and St. Martin islands. Most of the people of these islands are fishermen and there are many shrimpfarms in these areas. They can never avail the opportunities to have the electricity from the National Gridline. Therefore, some organizations (Grameen Shakti, BRAC, IFRD, LGED) are contribute to supply approximate 19.5kw of electricity by installation of wind turbine. [3] 3.

Methodology 3.1 Working Principle:

In this project, we constructed a vertical modified wind thrust propeller and a duel layer armature coiling generator.

All the experiments and tests were conducted by us. And our generator section is totally experimental. Our wind thrust propeller can rotate easily under a low wind thrust. According to rotation of propeller by wind thrust, duel layer armature coiling generator will be rotate and produce electricity. The total prototype is divided in two parts. One is wind turbine and another is generator part. Our wind turbine is efficient enough for Bangladesh perspective because our country don’t have proper wind thrust to plant a wind firm. So that we can

implement this wind turbine as it is very much positive to wind.

3.2 Construction and Hardware Configuration In this part winding and armature construction is illustrated. Here we also described the armature models our project is to design a new dimensional winding for our country’s perspective. We have collected data and got output with this model so far. Our construction of armature and hardware build up for winding was challenging as far as we got output. As we have already mentioned that the whole design was done by us and also made by us on hand. We will describe the construction of the wind turbine and the wind generator here briefly. We divided the construction and hardware configuration in two parts. (1) wind turbine. and (2) Generator 3.2.1 Wind Turbine We used plywood as the base of turbine blade in the upper and lower both side of the wind turbine. All blades are attached it with 0.5 inch screw. We used thin tin sheet as the blade of the turbine so that it is light weight and it can rotate easily at low wind thrust. Because of thin blade it can capture the wind thrust easily. It is thin enough to rotate easily by low wind thrust. Bearings were attached in the both side of the base of the wind turbine and fixed with metal pipe. When air is flowing, blades capture the air and rotate as rotor. Metal pipe acts stator. A metal pipe is also used in the turbine as the stand of the wind turbine. The gearing system is made of 2 parts. One of them is the big car gear which is fixed with the down side of the wind turbine and another one is fixed with a long shaft of the generator. These two gear is fixed at a point that will helps the little gear to rotate multiple times than the big gear rotates. So it helps the generator to move fast and generate electricity.

3.2.2 Generator Another and the most important part of this project is the generator. We used a circular tin can, which is 4 cm in radius.

A long screw is fixed in the middle of the tin can. We use this long screw as the rotor of the generator. It fixed with thin can (rotor) and the shaft of generator. 10 small bar permanent magnets are attached in the inside of the tin can. Shaft rotates with moving turbine and thin can rotates surrounding the coiling unit. Plywood it use as the core of generator, where coils are winding over it. And coils are used for production of electricity. Big gear is fixed with turbine base (ply-wood) and rotates with turbines moving part and small one is fixed with generator shaft. By moving of big generator small gear can be rotates up to 11 times. The successfully collected data and got output which are described as graphs.

© Faculty of Engineering, American International University – Bangladesh

4.

Data table 4.3: Output for duel layer coiling unit generator at 39-49 kph

Data Processing and Analysis

The whole data processing process is done very carefully.

At 39-49 kph we rotate our turbine and take output.

The output data table is given bellow: Data table 4.1: Output for inside coiling unit generator at 3949 kph Sl. 1

No of Magnets 4

Output voltage (V)

Output current (C)

0.48

0.21

2

6

0.97

0.28

3

10

1.84

0.48

The table shows that, the value of output current and voltage is greater than other 2 table, because the position of magnets are very closer from inside coiling unit. So, the maximum flux is cutting throughout the coil. Therefore, we get the maximum output from inside coiling unit.

Data table 4.2: Output for inside coiling unit generator at 3949 kph Sl. 1

No of Magnets 4

Output voltage (V)

Output current (C)

0.046

0.007

2

6

0.073

0.011

3

10

0.115

0.016

For outside coiling unit, the table shows that, the value of output current and voltage is less than any other table, because it’s cutting less amount of magnetic flux for presence of cane (where magnets are attached). Therefore, we get the minimum output from outside coiling unit.

Sl. 1

No of Magnets 4

Output voltage (V)

Output current (C)

0.38

0.09

2

6

0.91

0.17

3

10

1.35

0.27

According to the data table, we see that, the output voltage and current for duel layer coiling unit is less than 2nd one.

When we rotate the magnets as rotor of generator, 2 different magnetic flux are produce. This 2 types magnetic flux of duel layer coiling unit oppose each other, so that, we missed some cutting flux throughout the coil. Therefore, we get the minimum output from outside coiling unit.

5.

Discussions and Conclusions

In this project, all the experiments and tests were conducted by us. The total project is done successfully. This project has 2 parts. In experimental part, we experiment that electricity from both the inside layer and outside layer of the armature winding is possible, but when we want to take combine output there are few facts that was not expected in our project. On the other hand, the successful part is, to construct an effective wind turbine. Finally we can construct the most effective turbine, which is suitable enough for the natural prospects of Bangladesh but it can be modify more if we can do more research on the model of the wind turbine.

References [1] Gerhard J. Gerdes; WIND ENERGY –BASIC PRINCIPLES; Nadi, Republic of the Fiji Islands; November 14-25, 2005; Module 2.1-2 [2] Mohammad Golam Kibria Khan; WIND ENERGY IN BANGLADESH: PROSPECTS AND UTILIZATION INITIATIVES ; ISBN 984-32-1804-4; Page-447 [3] Ministry of Power, Energy and Mineral Resources;

[Cited 30th April 2014]; (http://www.powerdivision.gov.bd/user/brec/49/89)

© Faculty of Engineering, American International University – Bangladesh