FEASIBLE COOLING CURVE PAIRINGS Corollary of the Second Law of Thermodynamics Heat can only be transferred from a higher temperature to a lower one For heat exchangers this means that the higher temperature cooling curve and the lower temperature heating curve cannot intersect. o When this condition is satisfied, the pairing of a heating and cooling curve is said to be feasible /2499 Heat Exchanger desigr8/24/99 Heat Exchanger Design 7 FEASIBLE COOLING CURVE PAIRINGS u Corollary of the Second Law of Thermodynamics: Heat can only be transferred from a higher temperature to a lower one. u For heat exchangers this means that the higher temperature cooling curve and the lower temperature heating curve cannot intersect. u When this condition is satisfied, the pairing of a heating and cooling curve is said to be feasible