You are designing an afterburner to treat 2 m³/s of air at 1.02 atm and 20 °C. The pollutant concentration in the air stream is 3 g/m³. The fuel to be added is methane at a volumetric treated air-to-fuel (AF) ratio of 80. Its heat of combustion is 50,100 kJ/kg (you can assume the same for the pollutant). The reaction chamber following the combustion zone is a cylinder. The design flow velocity is 5 m/s and the residence time for the gas stream is to be 1 s. Find (a) the average temperature of the gas leaving the combustion zone and entering the reaction zone in degrees K; (b) the diameter of the reaction chamber in m, and (c) the length of the reaction chamber in m. You can assume that the polluted air to be treated has the properties of air (so the specific heat is 1.1 kJ/kg-K; also use this for the specific heat of the methane, your added fuel).

Solve the density of liquid ethanol at 180°C and 200 bar.

2. With an initial pressure of 30x105 Pa and constant operating temperature of 200°K in a 40 m³-tank containing ethylene and connected through a long pipe with a length of 1500 m and a diameter of 0.2 m to a reactor operating at atmospheric pressure. a. Calculate the volumetric flow in m3/s to the reactor when the valve is opened. b. Calculate the time needed to halve the pressure in the tank. c. Calculate the mass of gas discharged from the tank from the condition of b.

Problem 7-69 Gasoline at 20°C (sp. gr. 0.719, μ = 0.000292 Pa-s) flows at the rate of 2 L/s through a pipe having an inside diameter of 60 mm Determine the Reynolds number Ans: 104,400

Liquid weighing 0.98 gram and containing 90% of carbon and 8% of hydrogen give the following result in the bomb calorimeter experiment amount of water taken in the calorimeter equal to 450 gram water equivalent of the calorimeter equal to 450 gram rise in temperature of water equal to 1.8 degree centigrade if the latent heat of steam is 587 calorie per gram calculate the cross and net calorific value of the fuel

Mr.X performs the laboratory test and determines that 12 mg/l of alum dose is required to treat the water. What is the quantity of alum required to treat 14 million liters of water per day at a treatment plant. Also determine the amount of carbon dioxide gas produced per liter of water during treatment. B I U GGG 25 85 ET M 69

A power nozzle throws a jet of water which is 30 mm in diameter at a velocity of 40 m/s. What is the power exerted by the nozzle? Select one: O a. 80 hp O b. 30 hp O c. 20 hp O d. 50 hp

A cylindrical tank of methanol has a mass of 40 kg and a volume of 51 L. Determine the methanol’sweight, density, and specific gravity

A nozzle is a device for increasing the velocity of a steadily flowing stream of fluid. At the inlet to a certain nozzle, the specific enthalpy of the fluid is 3320 kJ/kg and the velocity is 60 m/s. At the exit from the nozzle the specific enthalpy is 2530 kJ/kg. The nozzle is horizontal, and the heat supply, the heat loss, the work input, and the work output to or from the nozzle are all negligible. (a) Determine the velocity at the nozzle exit