Exhaust gas from a chemical process flows at a rate of 8,000 acfm from point A (see Figure P2.4) at 250 °F and 1 atm pressure. It flows through a circular duct to a fan where the pressure is boosted to 4 inches of water (gage) and then flows to an incinera- tor. Fuel gas is burned at a rate of 75 pounds per hour and the temperature of the incinerator exhaust gas is 1200 °F. Assuming both the process exhaust and the incinerator exhaust streams have properties similar to air, calculate the enthalpy that has been added by burning the fuel gas (Btu/hour). Assume that you can recover heat from the incinerator exhaust by buying a heat exchanger to cool the gases to 500 °F while recovering useful heat. Assuning that such heat is worth $7.00/million Btu, how much money could you save by recovering that amount of heat ($/day)? 10" circular duct 1200 °F Incinerator 14" circular duct fuel Figure P2,4

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Project Management Techniques

The guideways or the roadways that are undertaken to perform a project efficiently and all the tools required to accomplish the task are the general outlines for project management techniques.