PINKU KASHYA – MRT14DPME23119

SANDEEP GANSELA – MRT13DPME164

RAJNIKANT – MRT13DPME139

ANKIT – MRT13DPME28

SUBHAM KUMAR - MRT14DPME23095

To design a solar rickshaw which would be manual driven as well as motor driven

using solar energy.

Why Solar Rickshaw

1.To reduce the effort of rickshaw puller2. To use abundantly available solar power3. To reduce the use of fossil fuels4. Ecofriendly in nature5. High future prospects in Renewable

energy field

Objective

To design a hybrid rickshaw, manual driven as well as motor driven using Solar Energy to reduce the effort of rickshaw puller. The payload would be 250 kg, two passengers with a driver.

Minimising the weight of the rickshaw.Maximising the surface area of the hood. Selection of motor and other circuitry elements.Selection of solar cells.Circuit design (electrical and mechanical).

This includes:

IntroductionThe sun provides the earth with energy at a rate of more than

100 000 TW (1 TW = 1012 W). India has high solar insulation, an ideal combination for using

solar energy. This energy can be used to drive a rickshaw. To reduce the effort of rickshaw puller decision has been

taken to assist rickshaw puller with the help of solar driven motors. This can be done in two ways:

Modification / improvement in prevailing rickshaw design. Modification / improvement in solar cells.

Since the field related to improvement in solar cells is confined for scientific research we will purchase solar cells directly from the market and will switch our focus on the mechanical part i.e. Designing the solar rickshaw.

Mathematical Modeling

Force analysis of rickshaw up the inclined plane

F= µMg cosϴ + Mg sinϴ Power, P=Force (F) × Velocity (V)

Solar cells and its selection

Solar cells are devices which convert solar energy directly into electricity by photovoltaic effect. The current generation of crystalline and amorphous silicon solar cells has efficiencies between 5% and 17%. Solar cells have been classified into following types:

• Silicon wafer based solar cells • Photo-electrochemical solar cells • Dye sensitize solar cells.

Battery and its selectionA storage battery is a group of one or more

electrochemical cells which comes in different sizes, shapes and specifications. Some of the commonly used include :

Lead-AcidNickel Cadmium (NiCd)Lithium ion (Li-ion)

Total daily energy expenditure by Electric Rickshaws

Battery Specifications

Electric Motor and its selection

A electric motor converts electrical energy to mechanical energy. Brushless DC motors are powered by direct current and have electronic commutation system rather than mechanical commentators and brushes. The current-to-torque and frequency-to-speed relationships of BLDC motors are linear. 48 volt Heinemann hub motor 1200 watt is selected

48 volt Heinemann hub motor 1200 watt is selected

CAD Model for Solar Rickshaw

Specification of Solar Rickshaw

Sample Calculations

For total (rickshaw + Passengers + Driver) mass, m = 400 kg to run on a flat road (ϴ=0o) running at a speed of 15 kmph/4 mps, the power required is 3136 W.

For the same rickshaw running on an inclined road (ϴ=4o) at the same speed, the power required is 4228 W.

The extra effort to be compensated is 4228 – 3136 = 1092 W. For the selected solar cell, power output per unit area = 168.1

W/m2. Through our CAD model we have achieved roughly 2 m2

generating 168.1 *2= 336.2 W

Future Aspects

To increase the efficiency of solar cell.

To reduce the weight of the frame and body.

To use light weight high energy density battery.

To use alternator or regenerative braking down the slope to

charge the battery.

To use sensors and actuators for speed control and battery

indicator.

Thank you