Heat exchange area calculation
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The hot air furnace has a capacity of 2 million kcal/h; the heating temperature is 240°C. The air supply volume to the heat exchanger is 26,500 Nm3/h, while the flue gas volume is 9,500 Nm3/h. The temperature of the flue gas entering the heat exchanger ranges from 750–140°C, and the temperature of the air entering the heat exchanger ranges from 20–240°C. Determine the heat exchange area required
Say nothing – what is the structure of a heat exchanger?
Generally, straight tubes with fins on them are chosen
A gas consumption of 2 million kcal per hour corresponds to approximately 240 cubic meters of natural gas. The heat exchange area is about 260㎡, of which the radiation section of the furnace has a heat exchange area of 30㎡ and the convection section has a heat exchange area of 230㎡