Patent ID: 8567485

Claim:
A heat transfer system comprising working fluid that undergoes compression and evaporation, an evaporator having an inlet and an outlet, and a heat exchanger, said heat exchanger comprising: a first tube having a first end connected to said outlet of the evaporator to allow transmission of said working fluid from said outlet; and, a second tube having a first end connected to said inlet of the evaporator to allow transmission of said working fluid to said inlet, wherein a portion of the length of the first tube is positioned in thermal contact with a portion of the length of the second tube so as to allow an exchange of heat between the working fluid in said first tube and the working fluid in said second tube; said first tube is constructed from a steel alloy having a carbon content of less than 0.03% by mass and a titanium content of between 0.05% and 0.4% by mass, thereby reducing the hardness of the steel alloy to facilitate bending of the first tube during installation within the heat transfer system.