1. The compression ratio of an engine working on the constant volume cycle is 9.3. At the beginning of compression, the temperature is 31°C and at the end of combustion the temperature is 1205°C. Taking the compression and expansion process to be adiabatic and the value of k as 1.4. Determine the following a. T2. 741.7657 K b. T4. 605.733 K c. Thermal Efficiency. 59.02%

1. The compression ratio of an engine working on the constant volume cycle is 9.3. At the beginning of compression, the temperature is 31°C and at the end of combustion the temperature is 1205°C. Taking the compression and expansion process to be adiabatic and the value of k as 1.4. Determine the following a. T2. 741.7657 K b. T4. 605.733 K c. Thermal Efficiency. 59.02%

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

See similar textbooks

Similar questions

In an ideal diesel cycle the pressure and temperature at the beginning of the adiabatic compression are 98.5kN/m^3 and 60°c, respectively.themaximum pressure attained during the cycle is 4.5MN/m^3 and the heat received during the cycle is 580kJ/kg gas.Determine for the cycle a) the volume ratio of compression b) the temperature at the end of compression c) the temperature at the end of heat reception d) the temperature at the end of adiabatic expansion e) the net work done/kg of gas f) the thermal efficiency g) the work ratio h) the mean effective pressure I) the Carnot efficiency within the cycle temperature limits.
A four-cylinder, four-stroke, 1.6-L gasoline engine operates on the Otto cycle with a compression ratio of 11. The air is at 100 kPa and 37°C at the beginning of the compression process, and the maximum pressure in the cycle is 8 MPa. The compression and expansion processes may be modeled as polytropic with a polytropic constant of 1.3. Using constant specific heats at 850 K, determine the engine speed for a net power output of 50 kW.
A four-cylinder, four-stroke, 2.2-L gasoline engine operates on the Otto cycle with a compression ratio of 12. The air is at 100 kPa and 60°C at the beginning of the compression process, and the maximum pressure in the cycle is 8 MPa. The compression and expansion processes may be modeled as polytropic with a polytropic constant of 1.3. Take Cy = 0.716 kJ/kg K, C, = 1.0 kJ/kg K. Determine the: 1. temperature at the end of the compression process. 2. Pressure at end of the compression process 3. net work output. 4. thermal efficiency. 5. mean effective pressure.
If the higher and lower temperature limit of the Carnot cycle is 250C and 20C, determine the work of expansion of the engine in each cycle. Use an air standard analysis.a. 165.0250kJ/kg b. 165.0251kJ/kg c. 165.0252kJ/kg d. 165.0253kJ/kg
In an ideal diesel cycle the pressure and temperature at the beginning of the adiabatic compression are 98.5kN/m squared and 60 degrees c respectively.The maximum pressure attained during the cycle is 4.5MN/m squared and the heat received during the cycle is 580kJ/kg gas.Determine ,for the cycle, (a) the volume ratio of compression (b) the temperature at the end of compression (c) the temperature at the end of heat reception (d)the temperature at the end od adiabatic expansion
A gas-fired power plant operating on a Brayton cycle draws in 9.0 kg/s of atmospheric air, initially at 300 K and 100 kPa, in order to generate 1.7 MW of electricity. If the combustion chamber adds heat by burning 0.07 kg/s of fuel with a heating value of 46.1 MJ/kg, and as a result the air entering the turbine is at a temperature of 861 K, determine the back work ratio of this device to 2 decimal places. You may treat the added mass of the fuel as negligible. Take the cp of air to have a constant value of 1.005 kJ/(kg K) throughout the whole cycle, and its ratio of specific heats k can be assumed to take the value 1.4.
A Carnot power cycle in a piston-cylinder device executes the isothermal compression at 300 K from 90 kPa to 120 kPa when its thermal efficiency is 60%. Please answer the following questions. a. On a P-v diagram, represent the cycle. Use the same numbers used in your textbook to identify the start and end state of each process. b. For the isothermal compression process determine the work per unit mass and the heat transported, in kJ/kg. c. Determine the temperature of the isothermal expansion, in K.
0.5 kg of air (ideal gas) executes a Carnot cycle having a thermal efficiency of 50%. The heat transfer to the air during the Isothermal expansion is 40 kJ. At the beginning of the Isothermal expansion, the pressure is 7bar and the volume is 0.12m3. Determine, i) The maximum and minimum temperatures of the cycle in K ii) The volume of air at the end of Isothermal expansion iii) The work and heat transfer for each of the four processes.
103#1. the working substance for a Carnot cycle is 8lbm of air. the volume at the beginning of isothermal expansion is 9cu ft and the pressure is 300 psia. the ratio of expansion during addition of heat is 2 and the temperature of the cold body is 90degree F. find (a)QA, (b) QR, (c) V3, (D)p3 ,(e) V4, (f) p4, (g) pm, (h) the ration of expansion during thge isenthropic process and (i) the overall ration of compression.
A four-cylinder, four-stroke, 1.6-L gasoline engine operates on the Otto cycle with a compression ratio of 11. The air is at 100 kPa and 37°C at the beginning of the compression process, and the maximum pressure in the cycle is 8 MPa. The compression and expansion processes may be modeled as polytropic with a polytropic constant of 1.3. Using constant specific heats at 850 K, determine the specific fuel consumption, in g/kWh, defined as the ratio of the mass of the fuel consumed to the net work produced. The air– fuel ratio, defined as the amount of air divided by the amount of fuel intake, is 16.
In an Otto cycle engine, air at 1 bar and 50°C is compressed until the pressure reaches 650 KPa. Heat is added during the constant volume process at a rate of 500 kJ/kg. Determine the compression ratio of the engine, the temperature at the end of compression and at the end of heat addition. Also determine the maximum possible compression ratio for this cycle. Take cp = 1.0 kJ/kg-K, cv = 0.706kJ/kg-K.
The Carnot engine operates on an ideal gas using the Carnot cycle shown in thefigure below. Using the first law of thermodynamics, we determine the thermalefficiency, specific heat impute (q), and work output (w) of each operating cycle,assuming that the internal energy does not change. (K =1.4 & R = 0.287 KJ / Kg. K)