Heat exchanger with beveled header

A header for a heat exchanger for cooling a heat source, the heat exchanger having a plurality of inner coolant flow tubes extending in a longitudinal direction for carrying coolant flow from a heat source for transferring heat from the coolant fluid to a fluid heat sink, the coolant flow tubes being generally rectangular in cross section, and disposed in a generally parallel relationship, the inner coolant flow tubes having at least one set of open ends in proximity to each other, said header comprising:

• an inlet end portion for receiving coolant from and/or delivering coolant to the open ends of the inner coolant flow tubes;
• and
• a closed end portion opposite said inlet end portion, said closed end portion being transverse to the longitudinal direction towards the coolant flow tubes;
• the closed end portion having a beveled wall beveled from an end plane perpendicular to the longitudinal direction of the coolant flow tubes and located at a part of said closed end portion spaced furthest from the set of open ends of the coolant flow tubes, in the direction towards the coolant flow tubes.

A header for a keel cooler for a water vessel, the keel cooler having a plurality of inner coolant flow tubes extending in a longitudinal direction for carrying coolant flow from a heat source for transferring heat from the coolant fluid to ambient water, the inner coolant flow tubes being generally rectangular in cross section, and disposed in a generally parallel relationship, the inner coolant flow tubes having at least one set of open ends in proximity to each other, said header comprising:

• an inlet end portion receiving from and/or delivering coolant to the open ends of the inner coolant flow tubes;
• and
• a closed end portion opposite said inlet end portion, said closed end portion being transverse to the longitudinal direction toward the inner coolant flow tubes;
• the closed end portion having a beveled wall beveled from an end plane perpendicular to the longitudinal direction of the inner coolant flow tubes and located at a part of said closed end portion spaced furthest from the set of open ends of the inner coolant flow tubes, in the direction towards the inner coolant flow tubes.

A heat exchanger for cooling or heating a heat transfer fluid, said heat exchanger comprising:

• a plurality of parallel, heat transfer fluid flow tubes for carrying heat transfer fluid between a heat source and a heat sink, said flow tubes including inner tubes and exterior side tubes, said inner flow tubes having a set of open ends in proximity to each other;
• and
• a header having a chamber and being connected to said set of open ends of said inner flow tubes, said header having an inner end portion for receiving said set of open ends of said flow tubes and an outer closed end portion opposite said inner end portion, and a roof section;
• said inner end portion, said outer end portion and said roof section defining part of said chamber, said outer closed end portion having a beveled portion beveled at an interior angle with respect to said roof section of less than 90°.

A multiple pass heat exchanger comprising:

• two exterior side tubes having orifices near the opposite ends of said exterior side tubes for conducting heat transfer fluid into and out of said exterior side tubes;
• at least one interior side tube having an orifice near one end and an open opposite end for conducting heat transfer fluid into or out of said interior side tube;
• and
• first and second opposing headers having chambers, said first header having means for receiving from a heat source, heated heat transfer fluid, each header having:
• an inner end portion;
• a roof section;
• a closed outer end portion opposing said inner end portion, said closed outer end portion having a beveled portion beveled with respect to said roof section downwardly toward said inner end portion, the ends of said exterior side tubes forming part of the chambers of said first and second headers, said orifices opening into the chambers;
• and
• said interior side tube extending to said closed outer end portion of one of said headers to divide said first header into multiple chambers, said interior side tube preventing the mixing of heat transfer fluid in said multiple chambers.

A multiple pass heat exchanger comprising:

• at least two sets of parallel heat transfer fluid flow tubes extending in a longitudinal direction for conducting heat transfer fluid in opposite directions, each set of flow tubes including:
• an exterior side tube having orifices for conducting heat transfer fluid into and out of said exterior side tube;
• an interior side tube having open opposite ends for conducting heat transfer fluid into or out of said interior side tube, said interior side tubes being adjacent to each other;
• and
• first and second opposing headers having chambers, each header having;
• an inner end portion;
• a roof section;
• a closed outer end portion opposing said inner end portion, said closed outer end portion having a beveled portion beveled with respect to said roof section downwardly toward said inner end portion, the ends of said exterior side tubes forming part of the chambers of said first and second headers;
• and
• at least one separator plate between said interior side tubes in at least one of said headers for dividing said header(s) into multiple chambers and preventing the mixing with heat transfer fluid between said multiple chambers.

A multiple heat exchanger comprising:

• exterior side tubes having orifices near the opposite ends of said exterior side tubes for conducting heat transfer fluid into and out of said exterior side tubes;
• a pair of adjacent interior side tubes having orifices near the respective ends facing in opposite directions away from each other, for conducting heat transfer fluid into or out of said interior side tube;
• and
• first and second opposing headers having chambers, said first header having means for receiving heated heat transfer fluid, each header having:
• an inner end portion;
• a roof section;
• a closed outer end portion opposing said inner end portion, said closed outer end portion having a beveled portion beveled with respect to said roof section downwardly toward said inner end portion, the ends of said exterior side tubes forming part of the chambers of said first and second headers, said orifices opening into the chambers;
• and
• said interior side tubes extending to said closed outer end portion of said headers to divide said headers into multiple chambers, said interior side tubes preventing the mixing of heat transfer fluid between the chambers, said means for receiving heated heat transfer fluid entering one of said chambers and said means for discharging heat transfer fluid entering another of said chambers.