In a cyclic batch process I have a gas of volume V Nm3/h at 650deg C (generating for 10 minutes) which needs to be cooled to 200 degC. Instead of adding ambient air directly or using spray water or a forced draft cooler to cool the gas, I am planning to use parallel metal plates in the duct which will absorb the heat and cool the gas.
After the heating cycle is over I will pass ambient air to cool the parallel metal plates to keep it ready for the next cycle.
My question is how can I calculate the area required and the time taken for cooling.
Any help shall be highly appreciated
Dear Pradip start to make this easy calculation supposing a 100% heat exchange between the gas mass and metal mass, knowing the heat cpacity of steel and the one of the gas you can easy come to the metal mass it should be required. If this mass has a reasonable value and not an huge one than you could go in more detail knowing that the realistic case will require much more metal to take in account heat exchange less than 100 % (convenction) and temperature of metal that will increase while gas is cooling.
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