QUESTION 6 An idea Otto cycle takes in air at 100 kPa and 27 °C and is limited to a maximum cycle temperature of 1317 °C. The minimum enclosed volume is 9.8% of the maximum enclosed volume. Determine: a). the temperature (T4) after isentropic expansion: K b). the net work output per unit mass per cylinder |kJ/kg

QUESTION 6 An idea Otto cycle takes in air at 100 kPa and 27 °C and is limited to a maximum cycle temperature of 1317 °C. The minimum enclosed volume is 9.8% of the maximum enclosed volume. Determine: a). the temperature (T4) after isentropic expansion: K b). the net work output per unit mass per cylinder |kJ/kg

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

Write the expression for efficiency of a Rankine cycle in terms of Wturb, Wpump, Qin, Qout, and enthalpies. Thermodynamics question briefly explanation please
For a given actual Rankine Cycle, the actual turbine work serves as the input in determining the isentropic turbine efficiency. True or False
For an ideal cold air-standard Brayton cycle with a compressor inlet temperature of 300 K and a maximum cycle temperature of 1700 K, use Eq. in the picture to find the compressor pressure ratio that maximizes the net power output per unit mass flow. Assume k = 1.4
Consider an air-standard Diesel cycle. At the beginning of compression, p1 = 14.0 lbf/in.2and T1 = 520 R. The mass of air is 0.145 lb and the compression ratio is 17. The maximum temperature in the cycle is 4000 R. Determine (a) the heat addition, in Btu.(b) the thermal efficiency.(c) the cutoff ratio.
PART D only A gas-turbine power generator operates on an ideal air-standard Brayton cycle 1 → 2 → 3 → 4 shown in Fig. 1. The gas temperatures at the compressor inlet, compressor exit, and turbine inlet are T1 = 300 K, T2 = 600 K, and T3 = 1200 K, respectively. Solve PART D below using the variable specific heat assumption PART D - Evaluate the thermal efficiency η of the cycle and the back work ratio rBW = wC/wT.
Consider a Brayton cycle with a pressure ratio of 13, that receives 6.5 lbm/s of air at 75 ∘F. Assume that the maximum allowable temperature in the machinery is 2500 ∘F. If the isentropic efficiency of the compressor and turbine is 93 % and 92 % respectively, then what is the thermal efficiency of this system? heat capacity of air: c_p = 0.240 btu/(R*lbm) k of air is 1.4
Draw the graph of Otto air standard cycle and prove that the thermal efficiency is equal to: Motto = 1_1/r^y-1 , where r is the compression ratio and y is the specific heat ratio.
What are the four major accessories of a Rankine Cycle? Define each.
An air-standard Carnot cycle is executed in a closed system between the temperature limits of 350 and 1200 K. The pressures before and after the isothermal compression are 150 and 300 kPa, respectively. If the net work output per cycle is 0.5 kJ, determine (a) the maximum pressure in the cycle, (b) the heat transfer to air, and (c) the mass of air. Assume variable specific heats for air.
35 - In the simple ideal Rankine cycle, the enthalpy of water at the pump outlet is 230 kJ/kg. If the pressure at the turbine inlet is 9 MPa and the temperature is 400ºC, which of the following should be supplied to the water at a flow rate of 50 kg/s? a) 225.5 MW B) 199.7 MW NS) 259.1 MW D) 224.8 MW TO) 144.4 MW
8 - In a Brayton cycle using air as the working fluid, the temperature at the compressor outlet is 530 K and the turbine inlet temperature is 1000 K. Mass flow rate is 24 kg/s. Which of the following is the heat given to the air? a) 12.29 MW B) 11.5 MW NS) 13.91 MW D) 14.18 MW TO) 10.99 MW
In a Rankine cycle, the enthalpies at turbine entry and outlet are 3159 kJ/kg and 2187 kJ/kg. respectively If the specific purp work is 2 kJ/kg. What is the specific steam consumption (in kg/kWh) of the cycle based on net output ?