GOVERNMENT COLLEGE OF ENGINEERING(An Autonomous Institution Affiliated to Anna University, Coimbatore)

SALEM- 636011

GENERATION OF ELECTRICITY FROM AUTOMOBILE EXHAUST USING MEMS

PRESENTED BY  

V.K.SARATH KUMAR ANSON JACOB SAMUEL

INTRODUCTION

To produce power at small scale from waste energy.Kinetic energy -> Mechanical energy -> Electrical energy. All the components is fabricated in a chip and covered. Deals with under lying principles of MEMS and pollution

control.

PRINCIPLE USED:ELECROMAGNETIC INDUCTION.Change in electric or magnetic field induces current in the circuit. Wind turbine coupled with a generator which uses the same

principle.

COMPONENTS REQUIRED:Micro wind turbineMicro generatorBatteryHeat exchangersCarbon filter

MICRO WIND TURBINEMiniaturized wind

turbine.Used as a prime mover to

rotate the micro generator.Requires a wind velocity

of 4m/s. Coupled with the micro

generator using a shaft.

MICRO GENERATOR: Miniaturized generator.To generate electricity.Operations similar to normal generator.To produce an output of around 12w.

BATTERY:

To store the generated power(DC). Capacity of the battery = maximum output of the

generator.If required DC can be converted in to AC using an

inverter.

CARBON FILTERS:To filter out the carbon content.Carbon emission cannot be

completely eliminatedCarbon particles are deposited and

recycled. HEAT EXCHANGERS: To liberate any extra or over heat.Extra heat would damage the

equipment.

WORKINGTwo units are: a. Filtering unit b. Generating unit

Click icon to add picture BLOCK DIAGRAM

EXHAUST

CARBON FILTER

CARBONFILTER

(Co2,Co etc.)

Co2 WITHLESS SMOKE

APPLICATIONS

ENGINEEXHAUST

COMPACT DESIGN OF GENERATING STATION

PRODUCTION OF ELECTRICITY FROM HEAT AIR

BATTERY

FAN

GENERATOR

POLLUTION FREE AIR

HIGH POWER APPLICATIONSFrom the above method,

power range of approx. 1-12W can be generated.

Power for high power applications can be produced by introducing Rankin cycle.

In such a case the wind turbine can be replaced by gas turbine.

FABRICATIONBased on silicon micro fabrication technology. Electrical components are fabricated on silicon wafers

using thin and thick film processing and lithography. Shallow features are then lithographically defined and

etched. Deep structures are then formed into the bulk of the

silicon wafers by deep reactive ion etching (DRIE). Final device is formed by bonding the silicon wafers,

creating a laminated, monolithic static structure with integrated quasi-three dimensional flow paths.

PERFORMANCENet output power = cycle power - viscous losses

(bearing friction, seal drag, disk windage and ohmic losses).

Introducing Rankin’s cycle, the output power increases drastically but the size of the equipment increases slightly.

No raw materials is required.

ADVANTAGES Waste heat is converted into useful energy (electrical

energy). Compact in size. Affordable and easily installable in any vehicle. Temperature and corrosion resistant. Less maintenance. Good efficiency.

CONCLUSIONSystem-level and component design studies have been

carried out for a miniature heat engine.These suggest that high power density Microsystems

possible.Efficiency levels on the order of 1-11% is achieved.Make use of the waste heat generated and hence provides

eco friendly power generation.

Thank you!!!

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