GROUP 8: PHOTOVOLTAICS: ENGG1000 TEAM 8 Tom Darley Xiaofan Deng Irene Dongol Constance Gong Samantha...

GROUP 8: PHOTOVOLTAICS:ENGG1000

TEAM 8

Tom DarleyXiaofan DengIrene Dongol

Constance GongSamantha Shen

Samuel Zhao


Problem Statement

Design a system of space travel that is:

•Safe – for occupants and spectators•Environmentally friendly

- runs on solar energy- constructed with materials of no commercial value

•Self-functioning•Able to ascend and descend a 7m tether•Within the size limit of 600mm x 600mm x 600mm


Our Design


Mechanics• What does it do

• The mechanical aspect of the project encompasses the drive system which is the backbone of the movement.

• Within this system the gears manage the energy output from the motor and control the torque as well as speed of the system.


Rationale for choice • Gearing Ratio to favour Torque or Speed? we decided on torque rather

than speed for several reasons ; • increased torque• higher speed could risk slippage

• Our drive system is designed in an angled orientation• reduce the overall size of the vehicle • contributed to a centre of mass closer to the centre of the elevator

• Choice of wheels or tank treads as the central contact point• addition of free spinning guide wheels as another means of increasing

balance and stability .


How did you make it ? - Combination of existing resources with other materials.

- Lego as a major resource / material > modifications made to existing Lego parts as a means of Integrating the two components of the system


Solar collection & Electronics

•What does it do in relation to the project

•How did you make it

•Rationale for choice, Data and Demonstration

–Connection method of two solar panels

–Electric circuit


Solar Collection & Electronics

•How Did we make it?• Product Circuit Board

• Solder


Rationale for choice, Data and Demonstration

•Connection method of two solar panels–Connect two panels in parallel

•Electric circuit– Type of switches–LED


Reasons for connect panels in parallel

• Both two connection methods the max powers are similar

• From the data sheet of motor, its working voltage is between 1.5 – 4.5V and the working current is between 0.15 to 1.4 A

0 1 2 3 4 5 6 70

0.5

1

1.5

2

2.5

3

3.5

0

0.5

1

1.5

2

2.5

3

Series Current (A)

Series Power (W)

Parallel Current (A)

Parallel Power (W)

Votage (V)

Cu

rren

t (A

)

Po

wer

(W

)

I-V data of two connection methods

In parallel

Voc (V) 3.45

Isc (A) 1.44

Vmp (V) 2.27

Imp (A) 1.25

Pmax (W) 2.85

In series

Voc (V) 6.36

Isc (A) 0.74

Vmp (V) 4.92

Imp (A) 0.59

Pmax (W) 2.9


Electric Circuit Diagram

Motor

+

-Solar panels

S 2

S 1

RL

Red LEDs

1

2

6

35

4

S 1: A single-pole double-throw switch button which is used to control the whole circuit.

S 2: A double-pole double-throw switch button on the top of elevator, used to change the direction of current.

Red LEDs: indicator lights. One of them will be bright when the device is off


Chassis

•The relationship with regards to our project .

•Rationale of choice.


Computer-Aided Design


Conclusion•Evaluation

–Strengths:– Solid chassis– Simplistic design

–Possible improvements:– Stronger materials and construction techniques– Wheel mechanics– Gearing– Types of wheels

GROUP 8: PHOTOVOLTAICS: ENGG1000 TEAM 8 Tom Darley Xiaofan Deng Irene Dongol Constance Gong Samantha...

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Transcript of GROUP 8: PHOTOVOLTAICS: ENGG1000 TEAM 8 Tom Darley Xiaofan Deng Irene Dongol Constance Gong Samantha...