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Objectives

—  The client has given a list of objectives which are as follows:

—  To travel within the campus for the disabled and help the older people visiting the campus.

—  It must also act as shuttle between the college campus and the hostels (boys & girls) for the needy students.

—  It must be simple and well furnished.

—  It must accommodate 3+1 persons with small luggage space.

—  A technological approach from BVB students.

Objective of the engine selection

—  Selection of engine to run the generator.

—  Engine should run the generator to produce electric. current until the battery is charged.

—  Preferred engine should be S.I. (petrol).

—  Four stroke is preferred.

—  Low maintenance.

Economical

Engine power

—  The generators are 70% efficient.

—  Engine 1.428 * p

—  Where to generate 2k of electricity we need to use 2.856 K.W

—  Different engines available in market.

—  Still we need to decide whether to use the commercial generator or to prepare full assembly of the generator.

Selection of engine for hybrid vehicle

—  If we select series hybrid then, engine is used to generate electricity.

—  In Parallel connection engine used drive the vehicle as well as to generate the electricity.

Other combinations of hybrids are there they are complicated.

—  Reasonable Efficiencies to use for cycle comparisons
Electric Motor (Peak) η = 95%

• Transmission Efficiency (0.95) = 1)-(Rη

• Battery Efficiency (Regen) η = 75-85%

• Battery & Generator Efficiency (Regen) η = 50-55%

• Battery & Motor Efficiency (Accel) η = 80%

• Solar Cell Efficiency η = 15%

• IC Engine (Peak Efficiency) η = 30%

• Flywheel Efficiency (Storage and Conversion Average) η = 70

Simple calculation

—  Power required to run the vehicle.

—  P_aero=(12.86*10^-6)*c_dAV(V+V_o)²

—  P_rr=(2.72*10^-3)*C_rr*M*V

—  P_aero=0.7914kW

—  P_rr=1.3056kW

—  P_gr=0.335 kW

—  Total  power = 2.432284 kW

—  From above  data 50% is the loss in conversion from  mechanical  to electrical  and from  battery to mechanical .

—  Power required is =  P_totel+1/2 P_totel

—  Power required =3.64827 kW 

Conclusion

—  From the above calculation we come to know that power required running series hybrid is 3.648 kW.