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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…