Method and Apparatus for Achieving Higher Cooling Rates of a Gas During Bypass Cooling in a Batch Annealing Furnace of Cold Rolling Mills

An apparatus for achieving higher cooling rates of a gas during bypass cooling in a batch annealing furnace, comprising:

• a nanocoolant preparation unit for preparing a nanofluid, and for supplying the nanofluid to a reservoir at a desired flow rate, temperature and pressure, the nanofluid being prepared by mixing industrial grade water with nanoparticles including dispersants using a high speed shear mixture;
• a heat exchanger receiving the nanofluid from the reservoir at a desired flow-rate, the reservoir being supplied with the nanofluid from the preparation unit, wherein the nanofluid exchanges heat with hydrogen and exits the heat exchanger via an outlet provided in the heat exchanger;
• a batch annealing furnace having a base for accommodating cold rolled steel coils, a furnace hood for heating the coils, a cooling hood for cooling the coils, a gas inlet, and a gas outlet, wherein cooled hydrogen gas from the heat exchanger enters the furnace via the gas inlet and heated hydrogen exits the furnace via the gas outlet.