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Description of the design task Design process design matrix Prototype/Model Engineering Analysis Summary and Conclusions References

Design Process Design Matrix

Content:

    Introduction

    Time Table

    Matrices

    Sketches

    Final Designs

    Flow Charts

 

Introduction

 

    With the criteria we put in place, we made several key choices on the final design we desired. We included the Horizontal axis wind turbine (HAWT) for educational use and power generation. This is the traditional type of windmill and we wanted to include in the design so it could be compared to the vertical axis wind turbine (VAWT).  The VAWT is a newer type of wind mill whose use is starting to expand so we will incorporate in our center. Having the windmills will allow us to educate the visitors on the difference between the two types.  We are also including a Micro Hydro system. Unfortunately there is not a steady moving body of water near the site, so the system will be for educational purposes only. The system will be placed inside of the center, where visitors could see how the system works.  Finally there will be a battery bank included in our design. The bank will consist of a three deep cycle battery system. All the power generated will be collected in the bank and stored for later use. This creates a closed system so the devices in the house are not drawing power directly from the power generating devices. The mechanisms we have in place are not always reliable, so the battery bank will resolve this issue. Our final design includes the VAWT, HAWT, Micro Hydro System, and the Battery bank.

 

Time Table

Time Line and Gantt Chart

 

Screening Matrix

  Water Tower  Playground Traditional  Geothermal Water Tower  Control  Helix 
Helix Wind Mil Windmill Micro Hydro Electric System  Wind Mill 
Ease Of Use + + + - - + +
Power Consumption + + + - - 0 +
Power Provided  + + + + + 0 +
Manufacturing Ease - - - - + - -
Maintain  - + - - + + -
Space consumption  + - - + + + -
Durability + - + + - 0 +
Cost - - + - + - -
Reliability  - - - + + + -
Materials Needed  + - - - + - -
Construction Time  - - - - + - -
Collaborate Design + + - + + + -
Total 2 -2 -4 -2 6 1 -5

 

Calculation of Weights

 

  Ease Power Consumption Power provided Manufacturing Ease Maintain Space Consuption Durability Cost Reliability Materials Needed Construction Time   Row Totals Final Weight
Ease 1.00 5.00 0.33 4.00 0.50 0.33 2.00 0.33 4.00 2.00 2.00   21.50 0.09
Power Conspution 0.20 1.00 1.00 3.00 0.33 0.33 0.50 0.20 0.20 0.33 1.00   8.10 0.03
Power provided 3.00 1.00 1.00 5.00 3.00 6.00 3.00 5.00 5.00 0.20 3.00   35.20 0.15
Manufacturing Ease 0.25 0.33 0.20 1.00 0.17 0.33 0.20 0.33 5.00 2.00 2.00   11.82 0.05
Maintain 2.00 3.00 0.33 6.00 1.00 3.00 2.00 0.33 3.00 5.00 0.20   25.87 0.11
Space Consumption 3.00 3.00 0.17 3.00 0.33 1.00 2.00 4.00 0.25 5.00 0.25   22.00 0.09
Durability 0.50 2.00 0.33 5.00 0.50 0.50 1.00 6.00 2.00 3.00 0.14   20.98 0.09
Cost  3.00 5.00 0.20 3.00 3.00 0.25 0.17 1.00 8.00 7.00 1.00   31.62 0.13
Reliability 0.25 5.00 0.20 0.20 0.33 4.00 0.50 0.13 1.00 5.00 0.20   16.81 0.07
Materials Needed 0.50 3.00 5.00 0.50 0.20 0.20 0.33 0.14 0.20 1.00 0.25   11.33 0.05
Contruction Time 0.50 1.00 0.33 0.50 5.00 4.00 7.00 1.00 5.00 4.00 1.00   29.33 0.13
                             
Final Total                         234.54  

 

Weighted Matrix

 

  Weights Traditional   Water Tower      Playground     HAWT     Geothermal     Water Tower      Control      VAWT  
        Helix Wind Mill         Windmill         Micro Hydro Electric     System      Wind Mill   
          Weighted     Weighted     Weighted     Weighted     Weighted     Weighted     Weighted
Ease 0.09 1.09   10.00 10.92   5.00 5.46   10.00 10.92   8.00 8.73   10.00 10.92   8.00 8.73   10.00 10.92
                                               
Power Conspution 0.03 1.03   4.00 4.14   10.00 10.35   3.00 3.10   6.00 6.21   3.00 3.10   5.00 5.17   8.00 8.28
                                               
Power provided 0.15 1.15   8.00 9.20   6.00 6.90   6.00 6.90   5.00 5.75   3.00 3.45   0.00 0.00   7.00 8.05
                                               
Manufacturing Ease 0.05 1.05   2.00 2.10   6.00 6.30   8.00 8.40   0.00 0.00   7.00 7.35   5.00 5.25   8.00 8.40
                                               
Maintain 0.11 1.11   8.00 8.88   5.00 5.55   8.00 8.88   2.00 2.22   8.00 8.88   8.00 8.88   7.00 7.77
                                               
Space Consumption 0.09 1.09   1.00 1.09   1.00 1.09   6.00 6.56   6.00 6.56   1.00 1.09   8.00 8.75   8.00 8.75
                                               
Durability 0.09 1.09   8.00 8.72   7.00 7.63   10.00 10.89   10.00 10.89   8.00 8.72   8.00 8.72   10.00 10.89
                                               
Cost  0.13 1.13   1.00 1.13   3.00 3.40   1.00 1.13   1.00 1.13   4.00 4.54   2.00 2.27   8.00 9.08
                                               
Reliability 0.07 1.07   2.00 2.14   3.00 3.21   1.00 1.07   8.00 8.57   8.00 8.57   0.00 0.00   2.00 2.14
                                               
Materials Needed 0.05 1.05   1.00 1.05   5.00 5.24   8.00 8.39   3.00 3.14   6.00 6.29   4.00 4.19   9.00 9.43
                                               
Contruction Time 0.13 1.13   1.00 1.13   3.00 3.38   6.00 6.75   1.00 1.13   7.00 7.88   5.00 5.63   7.00 7.88
                                               
Final Totals         50.50     58.51     73.01     54.35     70.79     57.59     91.60

 

Sketches

These are just sketches of some basic ideas that we had:

 

 

 

Final Designs

From our weighted Matrix we chose a few designs that will best fit our needs.

 

    Control system - This will control all of the energy that is created and store it for later use (see engineering analysis for more information)

    VAWT - Vertical axis wind turbine. This will be made from recycled materials or bought. It is essentially a split open 55 gallon drum that catches wind.

The VAWT design we went with was the Silent Wind Barrel 250W DC barrel wind turbine. It is a low cost design which is made out of a recycled water drum primarily for developing countries. Most of the electronic parts are removed from the design which makes the design very cost effect. 

 

HAWT -  Horizontal axis wind turbine. This is already bought and will catch wind just like a traditional wind turbine.

 

 

Micro Hydro Electric - This is only an educational venture inside the educational center. We will have two 55 gallon drums one elevated the other at the bottom of the room. When a valve is released the potential energy from the water is released and the water falls through a purchased generator and produces power to light a bulb. People will be able to see that energy was released because the light bulb will turn on as water falls.

 

Flow Charts

    --The basics of every system that we looked at.

        Wind power

 

 

    Micro-Hydro-electric

 

 


    Control system