Calculate the higher heating value of ethane Determine the f

Calculate the higher heating value of ethane. Determine the flame temperature when liquid methanol (ethyl alcohol) is allowed to react with 75% excess air at standard temperature. Hydrogen peroxide at standard temperature is allowed to decompose into water and oxygen. Find the temperature of the products. The Brayton cycle below takes in 0.2 kg/s of air at 300 K and 100 kPa. The pressure ratio of the compressor is 12. Air leaving the compressor mixes with methane at standard temperature and allowed to react. You must account for the changes in specific heat capacity with temperature and composition, so it is highly recommended that you attempt this in EES. Determine the mass flow rate of methane such that the temperature at 3 does not exceed 1300 K. Find the net power and thermal efficiency of the system. Calculate the total mass (kg) of CO_2 emitted in one year from this plant.

Solution

1.The higher heating value (HHV) refers to a condition in which the water is condensed out of the combustion products. The higher heating value includes the sensible heat and latent heat of vaporization especially for water. In other words, HHV assumes all the water component is in liquid state at the end of combustion

It is 1770 Btu/lb_m  for ethane