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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.
Assume the products of combustion in Problem 13.67 are sent out of tailpipe and cool to ambient 20oC. Find the fraction of the product water that will condense.
Saturated liquid exits the condenser at 37.5oC. Specific heat for R-123 is Cp0 = 0.6 kJ/kg K. Find the COP.
Find the mass flow rate, the total heat transfer, and the entropy generation, assuming the surroundings are at 25oC.
The fluid enters reversible adiabatic turbine at 160oC, 5.475 MPa and condenser exit condition. Compute the specific turbine work and the specific pump work.
Find the specific work input to the pump and the cycle thermal efficiency using the generalized charts.
A piston/cylinder initially contains propane at T1 = -7oC, quality 50%. What is the cylinder volume at the final state, and how much heat transfer took place?
Saturated liquid ethane at T1 = 14oC is throttled into a steady-flow mixing chamber. Find the rate of heat transfer and the rate of entropy generation.
Determine the volume expansivity, ap, and the isothermal compressibility, ßT, for water at 50 F, 500 lbf/in.2 and at 400 F, 1500 lbf/in.2.
Calculate the entropy per kmol of a real gas mixture of 50% methane, 50% ethane at 20oC, 4 MPa andin terms of the specified reference state values.
A piston contains ethane gas initially at 500 kPa, 100 L and at ambient temperature 0oC. Calculate the heat transfer and the net entropy change for the process.
What is your best estimate for the availability in a steady-flow setup where changes in potential and kinetic energies may be neglected?