Q48-A diesel engine working on dual combustion cycle has a compression ratio (10)and cut off ratio (15). The pressure at the beginning of compression is (2 bar) andthe maximum pressure in the cycle is (100 bar). Determine the thermal efficiency and meaneffective pressure of the cycle. Comp/nobi

Answered: Q48-A diesel engine working on dual…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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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
1. Cylinder conditions at the start of compression in an SI engine operating at WOT on an air-standard Otto cycle are 60°C and 98 kPa. The engine has a compression ratio of 9.5:1 and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual. Heating value of the fuel is about 44MJ/kg. Calculate: (a) Temperature at all states in the cycle. [°C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. [kJ/kg] (e) Net specific work done. [kJ/kg] (f) Indicated thermal efficiency. [%]
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Please use appropriate format for answering word problem: An ideal cold air standard Diesel cycle has a compression ratio of 18. At the beginning of compression, air is at 95 kPa and 20 o C. If the maximum temperature during the cycle is 2000 o C, determine (a) the thermal efficiency
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Q1-A diesel engine oprerates on the dual cycle in which the heat transfer veras me to the working fluid due to combustion of fuel as (1400kj/kg), half of which is transferred at the constant volume process and the remaining half at a constant pressure process. At the beginning of the compression stroke the temperature is (25°c) and the pressure is one bay. The compression ratio is (14) Calculate the efficiency of the cycle ⑥the maximum value of pressure and temperature which occurs during the cycle and the mean effective pressure of the cycle P
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

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Q48-A diesel engine working on dual combustion cycle has a compression ratio (10) and cut off ratio (15). The pressure at the beginning of compression is (2 bar) and the maximum pressure in the cycle is (100 bar). Determine the thermal efficiency and mean effective pressure of the cycle. Comp/nobi