consider a four-cylinder, four-stroke, compression ignition engine with a compression ratio of 20 and a cutoff ratio of 4. A). name the thermodynamic cycle you would use to analyze this engine, b). p-v and t-s diagram for this cycle, c). determine the heat input to the engine if the temperature rise of the heat addition step is 1300 C, and d). determine the engine speed in revolutions/minute for a net power output of 40 kW is the net cycle work is 3.0 kJ/cycle.
Solution:
consider a four-cylinder, four-stroke, compression ignition engine with a compression ratio of 20 and a cutoff...
Consider a four-cylinder, four stroke, compression ignition engine with a compression ratio of 22 and a cutoff ratio of 3. (a) Name the thermodynamic cycle you would use to analyze this engine, (b) draw the P-v and Tis diagrams for this cycle, (c) determine the heat input to the engine (in kJ/kg) if the temperature rise of the heat addition step is 1500°C, and (d) determine the engine speed in revolutions/minute (RPM) for a net power output of 50 kW...
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio of 20 and a cut-off ratio of 1.8. Air is at 30°C and 100 kPa at the beginning of the compression process. It may be assumed that for the air, the specific heat, Cp and gas constant, R are 1.005 and 0.287 kJ/kg.K, respectively. Calculate: the temperature (K) of the air at the end of the following processes: (i) (a) compression (ii) combustion, (ii...
Required information A four-cylinder, four-stroke, 1.8-L modern high-speed compression- ignition engine operates on the ideal dual cycle with a compression ratio of 16. The air is at 95 kPa and 70°C at the beginning of the compression process, and the engine speed is 2000 rpm. Equal amounts of fuel are burned at constant volume and at constant pressure. The maximum allowable pressure in the cycle is 7.5 MPa due to material strength limitations. Use constant specific heats at 1000 K....
A four stroke cycle Sl engine has a cylinder condition at the start of the compression of 27°C and 100 kPa. The engin has a compression ratio of -3.41 And heat addition from combustion is in "2.105 kJ/kg. The Thermal efficiency of the engine is equal to Round your final answer to 1.decimal place precision A four-stroke cycle Sl engine has a cylinder condition at the start of the compression of 27°C and 100 kPa. The engine has a compression...
Consider a cold air standard Otto cycle for a 4-stroke engine with four cylinders. The compression ratio is 9. At the beginning of the compression the air in each cylinder is at 95 kPa, 5 C and occupies a volume of 555 cm^3. During the heat addition process the pressure triples. Determine the efficiency of the cycle and the net power output (per kg of air). If the engine is running at 2800 RPM determine the power output in horsepower....
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of 78% at a speed of 45 rps. The bore is 6 cm and the stroke is 8.5 cm. What is the fuel flow rate, fuel-air ratio, and brake torque if the brake power output is 6 kW with ambient conditions of 100 kPa and 22 C?
A compression ignition engine is being analyzed. The residual gas fraction is xr=0.02. The fuel-to-air equivalence ratio is f=0.6. At the end of the compression stroke the temperature is T2=1300 K and specific volume is v2=0.19 m3/kg-air. The maximum cycle pressure is P3=4000 kPa. At the end of the power stroke the specific volume is 1.00 m3/kg-air. Calculate the temperature at the end of the combustion process, T3b, and calculate the work done [kJ/kg-air] during the power stroke.
QUESTION 3 A four-stroke cycle Sl engine has a cylinder condition at the start of the compression of 27°C and 100 kPa. The engine has a compression ratio of 8:1 and heat addition from combustion is in-1,906 kJ/kg. The Thermal efficiency of the engine is equal to Round your final answer to 1.decimal place precision.
Α 4-stroke spark-ignition engine has a compression ratio of 10 and operates on the ideal constant volume cycle with intake pressure of 50 kPa (throttled) and intake temperature of 300 K. The exhaust pressure is 100 kPa. The heat input from combustion is 2500 kJ/kg and γ = 1.3 for the working fluid. a. Draw the p-V diagram of the full cycle and indicate all the processes. b. Calculate the residual gas fraction and the temperature decrease during the exhaust...
5. An ideal diesel cycle has a compression ratio of 20 and a cutoff ratio of 1.3. Determine t maximum temperature of the air and the rate of heat addition to this cycle when it produces 250kW of power and prior to the compression stroke, the air is at 90kPa, and 15°C. 5. An ideal diesel cycle has a compression ratio of 20 and a cutoff ratio of 1.3. Determine t maximum temperature of the air and the rate of...