12. A 1.8-liter, 6-cylinder engine behaves as a polytropic air system with n=1.2. At the beginning the volume of air inside the cylinder is Vo=1/8 Vcylinder, the temperature and pressure are 25 °C and 77 KPa. At the end of the expansion, the temperature is 350°C and the volume is that of the cylinder. A. What is the pressure at the end of the cycle? B. If 40% of the boundary work is used to accelerate a 400 kg car. How long does it take for the car to go from 0 to 100 at 2000 RPM?

Q: Oxygen at P1=10 bar and T1=25 oC is compressed to P2=50 bar in a single stage compressor. If the…

A:

Q: Consider a Brayton cycle operating with a pressure ratio of 10. Air enters the compressor at 300 K…

A: Given that: Air enters the compressor at 300 K and the turbine at 1200 K Pressure ratio = 10 Case A:…

Q: A simple but non-ideal Rankine cycle operates with water as the working fluid and operating between…

A:

Q: Describe in your own words the operation of a petrol engine, and explain how it is estimated by the…

A: A petrol engine is a type of internal combustion engine that runs on gasoline as its fuel. It works…

Q: A2. A four-cylinder, 1.6 litre, spark ignition automotive engine operates at wide open throttle on a…

A:

Q: d. With the data given determine (A) the pressure and temperature of all five states, (B) the amount…

A: Given data,1-2→Compressor2-3→Combustion changer3-4→Turbine4-j→Nozzle

Q: rtion A: In practice the efficiency of diesel engines is higher than that of petrol engine. Reason…

A: To determine the correct option.

Q: Problem 1- ~~/ In an ideal Otto cycle of air, suppose the air is compressed to 650 K and 1800 kPa…

A: Given:The temperature at 2 is The pressure at 2 is The temperature at 4 is The pressure at 1 is The…

Q: a: Draw the P-v diagrams for the three power cycles and label each process: Diesel, Stirling, and…

A:

Q: The figure shows a PV diagram similar to the cycle of a Diesel engine. It consists of two adiabatic…

A: Given: The given cycle is similar to diesel cycle and heat input and exhaust heat is represented as:…

Q: What are the main reasons for running jet engines at high temperatures? Select one or more: a.…

A:

Q: The air temperature in the piston-cylinder at the beginning of the adiabatic compression process of…

A: In this problem we calculate compression work we know that is diesel cycle compression is adiabatic…

Q: d: Write down and explain the thermal efficiency formulas for the cycles explicitly. e: Discuss how…

A: (1) Diesel Cycle (2) Stirling Cycle (3) Brayton Cycle

Q: Compare the variation of the thermal efficiency with the compression ratio for the Otto and Diesel…

A:

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.