Lab 2 - Gas Engine - UPDATED raw_data

Lab 2 - Gas Engine - UPDATED raw_data - 7.9 Graph Data...

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rps rpm V A Pg m(fuel) T(exh) W(kw) T(N*m) 30 1800 0 0 40 2400 0 0 50 3000 0 0 60 3600 0 0 Units T(amb) 20.5 C RH(amb) 49.9 %RH P(tear) 1.5 mm H20
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State Measurements Eqn # ambient pressure kPa 101 T(o) C 21.8 21.9 21.4 21.6 rh(o) %humidity 46 46 47.3 45.6 Psat (T) kPa 2.34 2.34 2.34 2.34 Mamometer (o) Pa 161.82 318.73 470.74 573.71 density gasoline kg/liter 0.75 orifice diameter m 0.01 specific volume (air) m^3/kg 0.86 0.86 0.86 0.86 density (air) kg/m^3 1.167 1.167 1.168 1.168 Measurements engine speed rev/s 30 40 50 60 voltage V 25.5 32 35 37 current A 29 35.5 38 40 exhaust temperature C 20 20 20 20 airflow rate mmh20 16.5 32.5 48 58.5 fuel intial volue mL 0 0 0 0 fuel final volume mL 2 2 3 3 Time s 12.84 7.87 8.51 6.72 Fuel comsumption L/s 1.56E-04 2.54E-04 3.53E-04 4.46E-04 Calculations brake power W 1069 1655 1951 2214 (7) alternator efficiency (mu) 68 67.5 67 65.7 (Fig. 2) charge compensation (a) 0.98 0.98 0.98 0.98 (11) torque N*m 5.67 6.58 6.21 5.87 (8) specific fuel consumption kg/kJ 1.09E-04 1.15E-04 1.36E-04 1.51E-04 (3) brake thermal efficiency 0.156 0.148 0.126 0.113 (1) air mass flow rate kg/s 0.0019 0.0026 0.0032 0.0035 (12-2) volume flow rate m^3/s 0.0015 0.0022 0.0026 0.0029 (12-2) air fuel ratio (AFR) kg/kg 12.1 10.4 9.1
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Unformatted text preview: 7.9 Graph Data specific fuel consumption g/kJ 0.1093 0.1152 0.1355 0.1513 brake thermal efficiency % 15.600 14.800 12.576 11.269 Standard Atmosphere temperature K 298 pressure kPa 100 sat pressure kPa 3.17 rel humid 0.3 density air kg/m^3 1.23 Perfect gas density kg/m^3 1.169 R kJ/kg 0.29 30 40 50 60 500 1000 1500 2000 2500 0.00 0.80 1.60 2.40 3.20 4.00 4.80 5.60 6.40 7.20 Power vs Torque Row 24 Row 27 N (rev/s) BP (Watts) Torque (N*m) 30 40 50 60 500 1000 1500 2000 2500 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 Power vs Air-Fuel Ratio Row 24 Row 32 N (rev/s) AFR (kg/kg) 0.1000 0.1100 0.1200 0.1300 0.1400 0.1500 0.1600 Engine Speed vs. SFC Row 35 SFC (g/kJ) 30 40 50 60 N (rev/s) 30 40 50 60 0.100 0.110 0.120 0.130 0.140 0.150 0.160 10 12 14 16 18 20 Power vs Air-Fuel Ratio Row 35 Row 36 N (rev/s) SFC (g/kJ) Efficiency (%)...
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Lab 2 - Gas Engine - UPDATED raw_data - 7.9 Graph Data...

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