Q3: An Otto cycle has a compression ratio of (8.5) at the beginning of the com.Press ion stroke, the temperature is (300K) and the pressure is (90KPa). If the heatinput is (800Kj) and the maximum temperature in the cycle is 1100K, determine(a) The mass of air in the cycle. (b)The heat rejection.(c) thermal efficiency.(d) The mean effective pressure.

Step 1:• Compression ratio, r = 8.5• Initial temperature, T_{1} = 300, K• Initial pressure, P_{1} =…

Answered: Q3: An Otto cycle has a compression…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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A compression ignition engine has a compression ratio of 16:1, and at the beginning of the isentropic compression, the temperature is 15o C and the pressure is 0.1 MPa. Heat is added until the temperature at the end of the constant pressure process is 1480o C. a.)Determine the cycle efficiency (in %) b.)Calculate for the mean effective pressure (in kPa) c.) Determine the heat added per kg of air.
art Il: Power Cycles & Fluid Assume an Otto cycle with compression ratio of CR = 9 1. The intake air is at 100kPa, 20°C, and the volume of the chamber is 500cm prior to the compression stroke. The temperature at the end of the adiabatic expansion is T. 800K. If air specific heat capacity at constant pressure of air at atmospheric pressure and room temperature is c 1.01KJ/kgK Specific heat capacity at constant volume of air at atmospheric pressure and room temperature: Cy = 0.718KJ/kgK Calculate: (i) the mass of the intake air (ii) the temperature T3, (iii) the pressure pa, (iv) the amount of heat added by burning fuel-air mixture (v) the thermal efficiency of the cycle;B (vi) the mean effective pressure (MEP).
DUAL CYCLE Problem. Please show your solution completely.
Task 1 A V-8 Spark ignition engine has a 10 cm diameter bore and 10 cm stroke. At the beginning of compression process air is at 95 KPa and 27 Degree Celsius. 750 KJ/Kg of heat was transferred to air during heat addition process. The compression ratio is 8. Consider the variation of specific heats with temperature. A. Describe with the aid of diagrams the operational sequence of four stroke spark ignition engines B. Explain the mechanical efficiency for ideal otto cycle of two and four stroke engines C. What is the difference between four and two stroke spark ignition engines? D. Explain the relationship between thermal efficiency (n) and compression ratio (r). E. Why are high compression ratios not used in spark ignition engines? F. Determine the net-work output per cylinder per cycle (KJ) G. Determine the efficiency of the engine. H. Determine the Mean Effective Pressure (kPa) I. What is the Power Output of the engine running at 2000 rpm. Task 2 A compression ignition engine operates…
. The pressure and temperature of a diesel cycle at the start are 1 bar and 20°C, respectively and the compression ratio is 14. The pressure at the end of expansion is 2.5 bar. Find the percentage of working stroke at which heat is supplied per mass of air.
(b) The pressure, volume and temperature at the beginning of compression of a four stroke petrol engine are 105kN/m²,0.0005m³ and 25°C respectively. The maximum temperature of the cycle is 1400°C. The volume ratio of the engine is 8:1. i) Calculate the mean effective pressure in the cylinder.
write legibly pls A simple gas-turbine operates with air as the working fluid, a pressure ratio of 18:1 and a maximum temperature of 700°C. The air enters the compressor at 100kPa and 20°C. Determine: a. Thermal Efficiency of the cycleb. The heat addedc. The state of the air exhausted by the turbine
an air standard dual cycle receives air at 25 C at 1 atmospheric pressure. The compression ratio is 15, and the cut-off ratio is 2.5. During the constant volume heat addition process, the pressure doubles and the maximum temperature is 2300 K. Determine the heat added in constant volume process. Find the thermal efficiency.
In a C.I. engine working on the dual combustion cycle the compression ratio is 12.5:1. Air at 101.3kPa and 35°C is compressed adiabatically. Fuel is then added until the pressure reaches 4000kPa, then at constant pressure to a temperature of 1425°C. After adiabatic expansion to the initial volume exhaust takes place. Calculate: (a). work done/kg air (b). thermal efficiency
Please provide a clear solution, thanks.
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