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CANDLE LIGHT POWER FAN
Capstone Project Presentation
Sushant DubeySanjeev Dubey
Shri Kant Sudhakar Tiwari
THERMOELECTRIC POWER
The thermoelectric cooler (TEC) powered by a candle light. It started as an experiment of
how much power can be achieved from one candle.
But liked the idea and it worked really well so I built this electric-mechanical ornament.
It did not use a high temperature TEG-module, but instead a cheap TEC-module.
That can still handle 200 degrees Celsius which is good enough.
But liked the idea and it worked really well so I built this electric-mechanical ornament.
It did not use a high temperature TEG-module, but instead a cheap TEC-module.
PRINCIPLE
It is based on the thermo electric effect
The thermoelectric effect is the direct conversion of temperature differences to electric voltage
and vice versa.
A thermoelectric device creates voltage when there is a different temperature on each side.
This effect can be used to generate electricity, measure temperature or change the temperature
of objects.
The term "thermoelectric effect" encompasses three separately identified effects: the Seebeck
effect, Peltier effect and Thomson effect.
CONCEPT It is also called a peltier element and when you use it as a generator it's called seebeck
effect.
The module generates power to drive a motor and the motor fan/air flow will cool the
upper heat sink.
Higher temperature difference => increased output power => increased motor RPM =>
increased air flow => increased temperature difference
The motor start to turn at about 15 degrees difference, which to my surprise worked
when I just went outdoors with it and the upper heat sink got cooler than the basement.
MATERIAL REQUIREMENT
TEC Module
Heat Sinker
DC Motor
Candle
Electric Fan
Aluminum sheet
Control Unit
Stand
Copper wire
Re -chargeable battery(10 v)
TEC MODULE
The thermoelectric module is based in Bi2Te3 .
The electricity is generated when the temperature difference through modules
increases, and generator efficiency of converting thermal energy into
electricity also increase.
A Peltier cooler can also be used as a thermoelectric.
HEAT SINKER
Made of material with good thermal conductivity, generally aluminum alloys,
and also has a geometric structure.
Increases the surface area of the housing,
Increase heat dissipation.
Increase useful life.
DC MOTOR
The motor is a device used to convert electrical energy into
mechanical energy .E.g. AC Motors, DC Motors, induction
motors, Conventional DC motors
ELECTRIC FAN
To suck the air from the atmosphere by the fan which is
connected to the heat sinker acting as a coolant and let the
aspirated air and release it by the fan.
ALUMINIUM PLATE
It is a silvery-white , soft, non-magnetic , malleable metal .
low density metal .
ability to resist corrosion .
Good electrical and thermal conductivity.
CONTROL UNIT
A control unit operates by receiving input information which converts it into
control signal .
Then sent to the central processor .
The computer processor then tells the accompanying hardware which perform
operations .
Performs a function depending on the type of CPU, because of the variation
of the architecture between different manufacturers.
LITERATURE REVIEW Glatz et al. - Introduced a wafer fabrication process level based on the novel polymer
micro thermoelectric power generators for application to non-planar surfaces.
Rowe - He reported that thermoelectric power generator based on the waste heat is used
in a domestic central heating system with the modules located between the heat source
and the water jacket. In this application, the heat output provided by the burner gas / oil
passes through the generator before reaching the exchanger hot water central heating
Taguchi - Invented a thermoelectric power generator exhaust gas based for an
automotive application .
Min and Rowe - Reported in 1994 that generator consists of a series of modules
sandwiched between the transport channels and hot water cold.
CONSTRUCTION
Other heat sinks, TEC/TEG, motor, fan, thermal paste, bolts and base plate can be used.
A TEC or TEG module (smaller dimension than upper heat sink base plate). Specifications are
not that important but make sure it can handle high temperature.
Many modules are only 100 degrees C and then you need to modify the construction as it gets
warmer than that.
One hot side that is not hotter than TEC max-temp (My candle flame never touches the surface)
One cold side, an efficient heat sink (heat pipes) are a good choice
Good thermal paste to maximize temperature difference
FUTURE SCOPE
It can be classified in micro and macro scale depending upon conversion of potential
energy into electric power.
Future developments in these applications tend to move towards the Nano technology.
To develop more new thermoelectric unit geometries and configurations.
To focus on finding the most appropriate thermoelectric materials that could handle
higher temperatures from various industrial sources of heat at a feasible cost with
acceptable performance.
FEASIBILITY STUDY
A feasibility analysis usually involves a thorough evaluation of the operational (need),
financial and technical aspects of a proposal.
Facts considered in the feasibility analysis were :-
i. TECHNICAL FEASIBILITY :- Technical feasibility deals with the hardware and
software requirements.
ii. ECONOMIC FEASIBILITY :- This feasibility study have tangible and intangible
benefits prefect by comparing the development and operating costs.
iii. BEHAVOIRAL FEASIBILITY :- This analysis involves how it will work when installed
and assessment of the political environment and management in which it operates
ADVANTAGES
Extremely reliable and silent operation.
No moving parts .
Require much less maintenance.
Simple, compact and safe .
Very small and almost weightless .
Capable of operating at high temperatures.
Suitable where there is little or no electricity.
Environmentally friendly .
DISADVANTAGES
The major drawback thermoelectric power generator is relatively low
conversion efficiency.
Complexity in terms of installation.
APPLICATION
Domestic waste heat.
Residual heat from the exhaust gases generated by the motor applications .
Industrial waste heat Applications.
The waste heat from the incineration of solid waste applications .
RESULT
Aluminium plate hot temperature - 100-150 degrees Celsius.
Voltage and current with one candle- 0.4V and 0.25A so .1w output power.
Voltage and current with two candle- 0.54A and 0.67V. so 0.36W output
power.
A candle produce- 25 watts.
Efficiency 0.7%.
FUTURE SCOPE
Tend to move towards the Nano technology.
Focus on finding the most appropriate thermoelectric materials that could
handle higher temperatures.
Heat conversion at a feasible cost with acceptable performance.
Development of new flexible thermoelectric materials .
CONCLUSION
Devices that either convert heat directly into electricity .
Effective method of waste heat recovery.
Used by the military, medical, industrial, consumer, scientific / laboratory, and
telecommunications organizations.
Promising alternative green technology.
THANK YOU
QUERIES