Multiple tube diameter heat exchanger circuit

A heat exchanger assembly comprising:

• a pair of header members;
• a plurality of heat transfer tubes of substantially the same interior cross-sectional area extending between said header members;
• a plurality of convective cooling fins forming an array over said heat transfer tubes, said heat transfer tubes and fins adapted to transfer heat between the exterior of said tubes and fins and a working fluid in a gaseous or liquid phase within said tubes;
• and
• a pressure drop minimizing tube extending between said header members and within said heat transfer tube and fin array, said pressure drop minimizing tube have an interior cross-sectional area significantly larger than said heat transfer tubes and adapted to carry said working fluid in a gaseous phase as an inlet for said heat exchange assembly.

A heat exchanger assembly comprising:

• a pair of header members;
• a plurality of heat transfer tubes extending between said header members, said tubes adapted to transfer heat between the exterior of said tubes and a working fluid in liquid or gaseous phase within said tubes;
• a pressure drop minimizing tube extending between said headers, said pressure drop minimizing tube having a cross sectional area larger than said heat transfer tubes and adapted to carry said working fluid in a gaseous phase as an outlet for said heat exchanger assembly;
• a tube member connecting said pressure drop minimizing tube at one end to at lest one of said heat transfer tubes for transferring gaseous working fluid from said heat transfer tubes to said pressure drop minimizing tube;
• and
• a plurality of header tubes connecting said heat transfer tubes to carry said working fluid.

A heat exchanger assembly comprising:

• a pair of header members;
• a plurality of heat transfer tubes of substantially the same interior cross-sectional area extending between said header members;
• a plurality of convective cooling fins forming an array over said heat transfer tubes, said heat transfer tubes and fins adapted to transfer heat between the exterior of said tubes and fins and a working fluid in a gaseous or liquid phase within said tubes;
• and
• a pressure drop minimizing tube extending between said header members and within said heat transfer tube and fin array, said pressure drop minimizing tube having a interior cross-sectional area significantly larger than said heat transfer tubes and adapted to carry said working fluid in a gaseous phase as an outlet for said heat exchanger assembly.