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Find the mixture temperature before combustion and the work, assuming an adiabatic turbine.
Determine the temperature of the products exiting the chamber. Assume that only H2O, H2, and N2 are present.
Determine the enthalpy of combustion per kilogram of magnesium. Estimate the adiabatic flame temperature when magnesium is burned with theoretical oxygen.
Determine the percentage of theoretical air used in the process and the dew-point temperature of the products.
Find the final pressure, the heat transfer per kmol fuel, and the total entropy generated per kmol fuel in the process.
There is enough excess air to give a flame temperature of 1800 K. What are the percent theoretical air and the irreversibility in the process?
Calculate x if half of the H2O in the products is condensed. Calculate the absolute entropy of the products at the exit conditions.
The gas-turbine cycle in Problem 10.28 has qH = 960 kJ/kg air added by combustion. Assume the fuel is methane gas. Find the air-fuel ratio on a mass basis.
Find the work and heat transfer per kilogram of fuel mixture and also the exhaust temperature.
Find the dew point of the products and the mass of water condensed per kilogram of fuel mixture.
How does the dew point change as the equivalence ratio goes from 0.9 to 1 to 1.1? Why does combustion contribute to global warming?
Why are products measured on a dry basis? What is the dew point of hydrogen burned with stoichiometric pure oxygen? With air?
What makes the fuel cell attractive from a power-generating point of view? Is mass conserved in combustion? Is the number of moles constant?
How is a fuel enthalpy of combustion connected to its enthalpy of formation? What are the higher and lower heating values HHV, LHV of n-butane?
Make a list of design specifications for these bottles and give characteristic sizes and the amount of propane they can hold.
It is desired to design a portable breathing system for an average-sized adult. Determine the size of the system container and the heat exchanger.
Write a program to express the fluid density as a function of reduced temperature and pressure in the region of 1.0 = Tr = 1.2 in reduced temperature.
Write a program to obtain a plot of pressure versus specific volume at various temperatures as predicted by the van der Waals EOS.
Pentene, C5H10, is burned with pure O2 in a steady-flow process. The products at one point are brought. Find the specific heat transfer in the heat exchanger.
One alternative to using petroleum or natural gas as fuels is ethanol (C2H5OH), which is commonly produced from grain. Find the heat transfer per kmol fuel.
A sample of pine bark has the following ultimate analysis on a dry basis, percent by mass: 5.6% H, 53.4% C. Determine the air-fuel ratio on a mass basis.
Wet biomass waste from a food-processing plant is fed to a catalytic reactor. Determine the lower heating value of this fuel gas mixture per unit volume.
Determine the final pressure in the vessel and the heat transfer from the vessel during the process.
After combustion, the products cool down and exit at 500 K. How much heat transfer was given out for 1 kg propane?
Find the number of kmol of liquid water added per kmol of fuel and the dew point of the combined products.