A constant pressure fuel-air cycle of a compression ratio of (18). The ambient conditions are(1.0 bar) and (27 °C). The engine is running on CH,, which burned with 120% theoretical ofair, the residual gas fraction is (4%). If the pressure at the end of expansion stroke is 4.5 barand the exhaust temperature is (1200 K), calculate the cut-off ratio and thermal efficiency ofthe cycle if the lower calorific value is (42000 kJ/kg). Assume Cpp for products is (1.135kJ/kg.K) and (M, = 30), for reactants MR will be calculated from chemical equation.QinP2IsentropicP4P₁SuctionExhaustV3Qout

Answered: Image /qna-images/answer/26817696-5f71-4844-bdea-89e636238452.jpg

Answered: A constant pressure fuel-air cycle of a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The stroke and cylinder diameter of a compression ignition engine are 250 mmand 150 mm respectively. If the clearance volume is 0.0004 ?^3 and fuelinjection takes place at constant pressure for 5 per cent of the stroke determinethe efficiency of the engine. Assume the engine working on the diesel cycle.
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
The beginning of the compression stroke for an air standard Diesel cycleis at 98 kPa and 26oC. For a maximum cycle temperature of 2550oC anda compression ratio of 18, find (a) thermal efficiency (b) mep.
The maximum temperature in the cycle : (in degree Kelvin) is Otto cycle has a compression ratio of 8. Before the compression, the air is at 280 k, 85 kPa. The combustion produce a maximum pressure of 6.5 MPa.
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.
(can expect help me on questions 5-10 of my this practice problem statement ?)The container truck engine operated on the diesel cycle with a compression ratio of 12. Assume the mass of air in the engine is conserved. At the start of the compression process, the air is at 1 atm and 30 oC. 400 kJ/kg of heat is removed from the air during the constant-volume heat rejection process. The ratio of . Through the diesel cycle, 20% of the work done by the air is used to operate the vehicle's refrigeration and heat pump system. One diesel cycle took 0.7s to complete. The heat rejection from the refrigeration and heat pump system is 800 kJ. The refrigeration system uses R-134a as the working fluid and operates between 100 kPa and 1200 kPa pressure limits. cp = 1.005 kJ/kg/K, cv = 0.7177 kJ/kg/K, R = 8.314J/mol/K, Molecular mass of air= 29g/mol. 1) Calculate the temperature at the start of the heat rejection process. 2) Calculate the temperature at the end of the heat addition process. 3)…
For an engine working on the ideal Dual cycle, the compression ratio is 10 and the maximum pressure is limited to 70 bar. If the supplied is 1680 kJ/kg, find tlerressures and temperatures at the vaae the cycle ane kJ yele efficiency. The pressure and temperature of air at the commencemelil Of compression are 1 bar and 100 °C respectively. Assume Cp = 1.004 kJ/kg K and Cy .e «alient points of 0.717 kJ/kg K for air.
A 4 cylinder, 4 liter compcompression-ignition engine operates on the air standard dual cycle. It uses light duel fuel at air fluid ratio of 18. The compression ratio of the engine is 16:1 and cylinder bore diameter is 10cm. At the start of the compression state, conditions in the cylinders are 60°C and 100kPa with a 2% exhaust residual. It can be assumed that half of the heat input from combustion is added at constant volume and half at constant pressure. Calculate: 1. Temperature and pressure at each state of the cycle. 2. Indicated thermal efficiency 3. Exhaust temperature 4. Air temperature in intake manifold 5. Engine volumetric deficiency
5. In an ideal Otto Cycle, the pressure at the beginning of the compression process is 15 psia, the temperature is 70F and the volume is 13.08 cubic feet. The maximum temperature of thre cycle is 2804F, and the heat supplied is 372 BTU. Using constant specific heat, calculate: a. The temperature at the beginning of the combustion, Rankine b. The compression ratio c. The temperature at the end of the expansion process in Rankine d. The net work of the cycle in BTU e. The thermal efficiency of the cycle in percent
Thermodynamics. Show the ts and ov diagram. And show complete and step by step solution.
A diesel engine has an inlet at 100 kPa, 300 K and a compression ratio of 18:1. The combustion releases 2000 kJ/kg. (a) Sketch and label the P-v and T-s diagrams (b) Find the temperature after combustion using cold air properties. (c) Find the cycle efficiency and the mean effective pressure for the cycle. (d) The cut off ratio is the ratio of v3/v2, which is the expansion while combustion occurs at constant pressure. Determine this ratio for the cycle

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