The waste heat of hot exhaust gases from a heat-treating furnace at 500C with a flow...
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The waste heat of hot exhaust gases from a heat-treating furnace at 500°C with a flow rate of 12 m /s is available. The furnace burns propane, whose heating value is 50,330 kJ/kg. The price of the propane is $0.85/kg. The minimum allowable temperature of exhaust gases at the heat recovery equipment is 200°C. The exhaust gases are to be used to preheat combustion air entering the furnace at 27°C. Use the following assumptions: Air-fuel ratio = 20, furnace efficiency = 75 percent, operating hours = 6000 h, U-20 W/m °C. 1. Estimate the fuel and cost savings due to this heat recovery option. 2. 3. Choose an appropriate heat exchanger for this application. Calculate the surface area and the effectiveness of the heat exchanger. The waste heat of hot exhaust gases from a heat-treating furnace at 500°C with a flow rate of 12 m /s is available. The furnace burns propane, whose heating value is 50,330 kJ/kg. The price of the propane is $0.85/kg. The minimum allowable temperature of exhaust gases at the heat recovery equipment is 200°C. The exhaust gases are to be used to preheat combustion air entering the furnace at 27°C. Use the following assumptions: Air-fuel ratio = 20, furnace efficiency = 75 percent, operating hours = 6000 h, U-20 W/m °C. 1. Estimate the fuel and cost savings due to this heat recovery option. 2. 3. Choose an appropriate heat exchanger for this application. Calculate the surface area and the effectiveness of the heat exchanger.
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Answer rating: 100% (QA)
To estimate the fuel and cost savings due to the heat recovery option we need to calculate the amount of heat recovered and the corresponding fuel sav... View the full answer
Related Book For
Elementary Principles of Chemical Processes
ISBN: 978-1119498759
4th edition
Authors: Richard M. Felder, ? Ronald W. Rousseau, ? Lisa G. Bullard
Posted Date:
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