Rewrite the equation in terms of n, or n as the subject of the formula, or, n T₁=T₁ Substitute the of the pressure to fi

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Rewrite the equation in terms of n, or n as the subject of the formula, or, n T₁=T₁ Substitute the of the pressure to find n and m. (4 marks) 2. Volume induced= 1= V₁ - V Calculate the induced volume by finding the difference in that of point 1 and 7 then 2 and 5. (4 marks) Calculate the powers for each stage. Remember n and m, induced volumes from 2 are different and pressure ratios are different. Multiply equation by N/2x60 to get your answers in W. The add the indicated power for both cases. (6 marks) 3. Total minimum power2x (power required for one stage) Use the average index (nem)/2, 4. induced volume 1-7 to find the total indicated power. (2 marks) • 5. Calculate the density, mass flow rate and rate of heat (6 marks) == CALCULATIONS P₂ (n-1)/

INPUT VARIABLES P, Intake Pressure P. Stage1 Compression Pressure T Stage 1 Inter Cooling Pressure P=Stage2 Compression Pressure T, Intake Temperature Stage1 Compression Temp T, Stage 1 Inter Cooling Temp Stage2 Compression Temp Motor Current (Ampere) Stage 1 Air Flow (m/s) OUTPUT Bar kPa 86.54 520 520 897 Kelvin 294 338 298 36 309 12.71 Ampere 14.74 Metre/sec SCCE FREES 0.9 52 52 8.97 Deg (C) 21 64 25 1000 900 800 700 600 500 400

OUTPUT Pressure/Volume Index P.V. Index n P.V." Index m Mass Flow Free Air Delivery (FAD) Atmospheric 87.24 kPa and 21.125356125 Mass Flow (based on Compressor RMP) Stage 1- Indicated Power (IP 1) Stage 2- Indicated Power (IP 2) Total Compressor Indicated Power (IP) Electrical Power Input Compressor Mechanical Efficiency Isothermal Efficiency Stage 1-Volumemetric Efficiency Stage 2-Volumemetric Efficiency Total-Volumemetric Efficiency (kg/min) (L/min) (kg/min) kW kW kW KW % % % % 400 300 200 100 0 0.0 50.0 Stage Cycle Stage 1-Start Compression Stage 1-End Compression Stage 2-Start Compression Stage 2-End Compression Stage 2-End Delivery Stage 2-Start Intake Stage 1-End Delivery Stage 1-Start Intake Volume V1 V2X V2 V3 V4 V5 V6 V7 100.0 (cm³) 321.41 61.32 56.30 33.88 2.65 4.40 3.81 19.98 150.0 Pressure P1 P2X P2 P3 P4 PS P6 P7 200.0 Bar 0.9 5.2 5.2 9.0 9.0 5.2 5.2 0.9 kPa 87 520 520 897 897 520 520 87 & 250.0

Stage Compression Tang astro Conten Stage2 Compresson Teng Motor Comment Amper age 1 Ar Fie in PV Indes Peso/Vidine intere Mes Flux Free Air Delivery (FAD) Les 87.24121.3213 age 1-infumat for 1.31 Stage 2 indicant To Compresorted Power P Stage 1-Volymenetic ceny ge 2-Volumemetic Ency Total-Vaneme onay God OUTPUT te my "VALE RG PALIC 64 338 294 36 309 1271 Anges 14.74 Mewhe Sans BUMI GARD AAN ww PAN ww 500 400 300 200 100 500 Stage Gale Stage-art Compress Stage 1-End Compression 2-Start Comp age 2-End Compression pe 2-End Devery Stage 2-Start ak Stage -End Delivery Start intake Vudme IA vax V2 13 VA SA 1000 VE VT Lank 32141 14:30 33.34 2.45 4.40 381 133 1000 Pass PI P2 PI PS PE 2009 333333333 12 12 10 52 APA 120 120 897 197 529 120 67 2900 3000 71 xt₁ 12 13 14 SL TE 1500 Deg (C) Ka 19 8 21 14 214 338 201 309 298 238

100 0 0.0 50.0 Stage Cycle Stage 1 - Start Compression Stage 1 - End Compression Stage 2 - Start Compression Stage 2 - End Compression Stage 2 - End Delivery Stage 2 - Start Intake Stage 1 - End Delivery Stage 1-Start Intake Volume V1 V2X V2 V3 V4 V5 V6 V7 100.0 (cm³) 321.41 61.32 56.30 33.88 2.65 4.40 3.81 19.98 150.0 Pressure P1 P2X P2 P3 P4 P5 P6 P7 200.0 Bar 0.9 5.2 5.2 9.0 9.0 5.2 5.2 0.9 kPa 87 520 520 897 897 520 520 87 250.0 300.0 Temperature T1 T2X T2 T3 T4 T5 T6 T7

Pressure P1 P2X P2 P3 P4 P5 P6 P7 Bar 0.9 5.2 5.2 9.0 9.0 5.2 5.2 0.9 kPa 87 520 520 897 897 520 520 87 Temperature T1 T2X T2 T3 T4 T5 T6 T7 Deg (°C) 21 64 25 36 36 25 64 21 Kelvin 294 338 298 309 309 298 338 294

Cylinder Diameter (mm) Stroke Length (mm) Stroke Volume (cm) % Clearance: Stroke Volume INPUT VARIABLES Stage 1 76.0 70.0 317.6 1.2% Stage 2 32.0 70.0 56.3 4.7% 1000 CONSTANTS FIXED Dry Air Density (100kPa @ 25°C) Air Gas Constant (R) Atmospheric Pressure Gauge Delivery Pressure Intake suction below Atmospheric 1.17 287.0 87.2 8.1 -0.70 kg/m³ J/kg.K kPa 809 kPa