LAB SESSION # 11STUDY OF TEST BEDENGINE SPECIFICATIONS:

4 Stroke 4 Cylinder (Vertical Configuration) 2700 cc Water CooledPROCEDURE: Firstly attach the petrol engine to the test bed. Take different readings at the full consumption time and different rpm but keeping the load constant throughout the experiment. Perform the set of calculations Draw the characteristic curvesOBSERVATIONS AND CALCULATIONS:

Swept Volume = Vs= 0.0015 m3Engine Speed = N =1200 rpmEngine Load= F =5, 35, 50 NMoment Arm = r =0.2865 m

Sr. #Engine Load

F(N)Torque

T=Fxr(N.m)Brake Power(kW)Volume Flow Of FuelVf=vol/t(m3/s)Mass Of Fuelmf=Vfxf(kg/s)

151.431804.91 x 10-73.5 x 10-4

23510.0212616.7 x10-74.7 x 10-4

35014.318009.6 x 10-79.6 x 10-4

Heat SuppliedC.V x mf(kW)Brake Thermal Efficiencyf = Specific Fuel ConsumptionS.F.C = mf x(kg/kWh)

16.781.117.06

21.645.81.34

44.24.671.92

GRAPHS:

LoadTorque

51.43

3510.02

5014.3

LoadBrake Power

5180

351261

501800

LoadS.F.C

57.06

351.34

501.92

LoadBrake Thermal Efficiency

51.11

355.8

504.67

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