Air is heated in an air heater from 30°C to 110°C, and the hot gases cool from 210°C to 145°C. Calculate the log-mean temperature difference between air and gas with the two fluids in parallel flow and counter-current flow.
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Step 1
For parallel flow: At the inlet, the temperature difference (ΔT1) is 210°C - 30°C = 180°C. At the outlet, the temperature difference (ΔT2) is 145°C - 110°C = 35°C. For counter-current flow: At the inlet, the temperature difference (ΔT1) is 210°C - 30°C = Show more…
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