KATHMANDU UNIVERSITYDHULIKHEL,KAVRE

SCHOOL OF ENGINEERINGDEPARTMENT OF MECHANICAL ENGINEERING

 

FINAL PRESENTATIONON

DESIGN AND FABRICATION ON ELECTRICITY GENERATING STAIRCASE 

PresentersShreya Acharya (12118)Abhar Bhattarai (12124)Surath Mahat (12140)Sunil Singh (12143)Erica Tamang (12144)

AUGUST , 2016

Project Coordinator : Er. Malesh Shah Department Of Mechanical Engineering Lecturer, Kathmandu University

Supervisor : Er. Pratisthit Lal Shrestha Department Of Mechanical Engineering Lecturer, Kathmandu University

Introduction and Background This project attempts to demonstrate that energy can be

tapped and used at a commonly used floor steps. The basic working principle of “Electricity generating

staircase” is based on the sprocket and chain drive arrangement .

The linear motion of the steps when we climb on it is converted into the reciprocating motion, which in turn will be used to generate efficient electricity.

It is eco-friendly; easily accessible and non-conventional power generation system when compared to existing systems.

OBJECTIVES To make the prototype of the footstep through which we can

produce electricity. To fit the mechanical parts like chain drive, sprockets, chain

locking system, springs and dynamo for the staircase. To test the production of electrical energy through one step

of staircase.

SCOPE OF WORK

To analyze the application of this system in large scale. To increase the efficiency of energy production since this

system uses less input to produce comparatively more output.

To find the possibilities for the utilization of the energy which we waste in everyday life while climbing stairs.

To develop economic and efficient methodologies to encounter the major problem of limited energy sources.

METHODOLOGY Basically this mechanism shows the linkage of sprocket and chain

arrangement. Three sprocket and a chain drive link with the chain locking system

allowing the staircase to move in linear reciprocating motion. The springs are fitted in the base of the step so that there is the flexibility

in the step which can further help in rotating the sprocket by which the chain moves and thus we can generate the electricity.

The dynamo is fitted at the smaller sprocket and when the chain moves the mechanical energy is converted into the electrical energy.

Then the flywheel is attached in which the belt drive is used and that helps to rotate the smaller sprocket that is placed at the bottom.

A chain locker is also used which locks the chain so that the chain doesn’t move unsystematically and backward.

The smaller sprocket is attached with the dynamo so when smaller sprocket is moved due to chain drive then to dynamo starts to work which helps to generate electricity.

Side view of electricity generating staircase

DESIGN OF THE SYSTEM

DESIGN OF THE SYSTEM

Front view of electricity generating staircase

Choosing Chain Locking System over Rack and PinionChain Locking System Rack And Pinion

It is very easy to install - especially on round tube gates like chain link.

Installing it at the right height on the gate and level takes more time and consideration than

chain.

The chain runs the length of the gate and is feed through 2 idlers and a power driven sprocket.

On the bottom of this bar there are teeth that face downward - these teeth interact with a

mechanized gear on the opener that moves the gate back and forth

It doesn’t provide back force once the pressure is relieved

It provides back force once the pressure is relieved

It doesn’t require modification in the gate. It may require modification in the gate. 

Will last as long as we need as it is machine

operating 

May does not last for so long time 

CHOOSING CHAIN DRIVE OVER BELT DRIVEChain Drive Belt Drive

No power loss due to slippage Power Loss

More practical for slow speed drives Less Practicable

Can be used in reversing drives Cannot be used In reversing drives

Faster mode of transmission Slower mode of transmission

More compact than belt drive Less compact

Can operate in wet conditions

 Cannot operate well in wet conditions

Doesn’t deteriorate due to external climatic

conditionCan deteriorate due to external climatic condition

Can operate effectively at high temperatures Cannot operate in high temperature

Chains can be used with varying shaft

center distances

Cannot be used with the varying shaft center

distances

Easy maintenance Difficult maintenance

Gantt ChartTask April May June July

  weeks weeks weeks weeks 

1

 

2 3 4 1

 

2 3 4 1 2 3 4 1 2 3 4 

Literature Review                               

 

Dimension and calculation                               

 

Fabrication                               

 

Work done                               

 

Work Remaining                               

 

Testing Evaluating                               

 

Report submission                               

 

Experiment MethodologyCalculated the dimensions and made the design

Market survey for sprocket ,spring

and dynamo

Fitting work is performed with the help of TTC

Filing and cutting of metal

is performed

Drilling and joining the

metals

Joining the dynamo with the

chain drive

Running the entire system

BUDGET ESTIMATIONSN Name Specification Unit Per Unit

Price (Rs)

Quantity Total

(Rs)

Remarks

1 Wooden Plank Hard wood

 

pcs KUTTC 2 KUTTC  

2 Spring   pcs 75 8 1000  

3 Sprocket

 

  meter 80 2 160  

4 Chain

 

iron meter KUTTC 1 KUTTC  

5 Chain locking

system

Aluminum pcs KUTTC 1 KUTTC  

7 Capacitor Electrical pcs 150 1 150  

9 Dynamo Electrical generator pcs 2000 1 2000  

 

10 Flywheel metal pcs 160 1 160  

11 Nuts and Bolts metal pcs 10 4 40  

12 Miscellaneous         500  

          Total 4010  

DimensionsDimensions Measurements (cm)

Diameter of sprocket 6.2

Number of links in chain 25

Length of metal base 55

Breadth of metal base 24

Length of horizontal metal bar 55.7

Distance between two sprockets 14.2

Distance between two metal bars 5

Distance between two metal base 9.7

Height of secondary metal base 7.5

Problems Encountered

Proper sized springs were not found which caused a delay in the project.

There was a problem to fix the sprockets parallel. Design of the chain locking system was a huge challenge. It was challenging to design the project model in auto cad. The smaller sprocket couldn’t give the sufficient amount of

efficiency to the dynamo so that it could run and generate electricity 

CONCLUSIONThis activity includes the characteristic of the sprocket and the chain drive. The staircase mechanism would be capable of lighting a led bulb efficiently at low cost. This report presents the performance of staircase which includes variation of its scope with cost effective and efficient methodologies to utilize the wasted energy. With the application of sprocket and chain drive we can make the wider scope of this staircase project.

THANK YOU…