Department of Mechanical Engineering Khulna University of Engineering & Technology A Presentation on Generation Electrical Energy Using the Excess Heat of an Internal Combustion Engine A special study submitted in partial fulfillment of the requirements for the 3rd year, ME 3100 competition Supervised by Submitted by Engr. Md. Fazle Rabbi Mahfuj Ul Sakik Assistant Professor Roll:1305032 Department of Mechanical Engineering Department of Mechanical Engineering Khulna University of Engineering & Technology Khulna University of Engineering & Technology Khulna-9203 Khulna -9203
Transcript
Department of Mechanical EngineeringKhulna University of Engineering & Technology
A Presentation on Generation Electrical Energy Using the Excess Heat of an
Internal Combustion Engine
A special study submitted in partial fulfillment of the requirements for the 3rd year, ME 3100 competition
Supervised by Submitted byEngr. Md. Fazle Rabbi Mahfuj Ul SakikAssistant Professor Roll:1305032Department of Mechanical Engineering Department of Mechanical Engineering Khulna University of Engineering & Technology Khulna University of Engineering & Technology Khulna-9203 Khulna -9203
Introduction Objectives Basic Requirements Construction Working principle Advantage Disadvantages Conclusion
Outline
To study and gather knowledge on technologies of production of electrical energy by using the excess heat of an IC engine.
To get well known with the Thermo-electric Generator.
Objectives
The “energy crisis” has become the major challenge for the present humanity and mankind .According to the law of conservation of energy it is known that energy can only be transformed or be transmitted ,neither be created nor destroyed .So far while transforming energy there is nothing but a little or huge loss ,so called waste of energy .The main purpose of this presentation is to utilize the waste heat energy of an IC engine into Electrical energy.
Introduction
IC engine. Thermo-electric Generator. Resistive load. Support structure.
Basic requirements
It is a device that can produce voltage between two different junction when there is applied a temperature difference .
It works on the procedure of “seebeck effect” .The voltage that is produced is called the “seebeck voltage”.
What is a Thermo-electric Generator(TEG)
Basic structure of TEG
Seebeck effect The Seebeck Effect is the conversion of temperature
differences directly into electricity. It is a classic example of an electromotive force (emf) and leads to measurable currents or voltages in the same w In general the Seebeck effect is described locally by the creation of an electromotive field.
Eemf = -S ΔT Where S is the Seebeck coefficient (also known as thermo-
power), a property of the local material, and ΔT is the gradient in temperature T. ay as any other emf.
Contnd…
During the expansion stroke of an IC engine there develops a huge amount of temperature in the engine cylinder.
The exhaust gas carries away the excess heat .Moreover water jacket is used to cool down the cylinder
Working principle
This excess heat can be collected by heat exchanger and this can be used as a heat source for a TEG.
This heat source is connected to heat sink by p-type and n-type semiconductor.
If the two semiconductor are connected by two wire to a resistive load ,there we will gain a voltage difference.
Contd…
Waste heat recovery from an IC engine. Efficiency can be increased by using the same
amount of fuel. Easy to construct. Less skilled labour required to maintain the
device.
Advantages
Fluctuation of power. TEG can only be used during the working period
of the IC engine.
Disadvantages
By using TEG the waste heat can be utilized .Advanced technology of the production of electrical energy has been studied .It can bring a revolutionary change in the energy technology.
