JP2005512009A5

JP2005512009A5 -

Info

Publication number: JP2005512009A5
Application number: JP2003549821A
Authority: JP
Filing date: 2002-10-30
Publication date: 2006-01-05

Claims

A heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle:
A set of elongated headers having longitudinal axes disposed substantially parallel to each other;
A plurality of elongate tubes spaced apart in parallel along the longitudinal axis of the header, each tube having a flat cross section having a long side and a short side, each tube being between the headers A first end connected to one of the headers and a second end connected to the other header, each tube being continuous from the one header to the other header. The tubes themselves are folded so as to define parallel sections of at least two tubes so that the working fluid flows through at least two parallel fluid paths to each of the parallel sections. Wherein the long sides of the tubes are arranged on a common plane substantially perpendicular to the longitudinal axis of the header and spaced apart from each other; and
Serpentine fins extending between adjacent sets of tubes, each fin extending parallel to the parallel sections of the adjacent tubes and extending over at least two parallel sections of the adjacent tubes A plurality of alternating tabs and elongated gaps each extending parallel to the parallel section, the tabs and the gaps connecting the lateral widths of each fin to each other by the tabs. Is disposed between the parallel sections of the adjacent tubes to divide into separate fin elements, each fin element corresponding to one of the parallel sections of the adjacent tubes, and one of the parallel sections heat exchanger comprising a fin, characterized in that it extends along the One.

The heat exchanger according to claim 1, wherein the long side of each tube is 12.7 mm or less and the short side is 2.54 mm or less.

The heat exchanger according to claim 1, wherein the long side of each of the tubes is 8.13 mm or less and the short side is 1.52 mm or less.

At least two bends to define parallel sections of at least three tubes, such that each tube flows the working fluid continuously from one header to the other through at least three parallel fluid paths. The heat exchanger according to claim 1, wherein

Each fin has a fin height extending parallel to the longitudinal axis of the header from one of the tubes to another adjacent tube, and the long side of the tube is less than or equal to the fin height; The heat exchanger according to claim 1.

The heat exchanger according to claim 1, wherein the long side of the end of the tube extends parallel to the longitudinal axis of the header at a portion where the end of the tube connects to the header.

The heat exchanger according to claim 1, wherein the gap of the fin is a slit that does not require removal of fin material when forming the fin.

The heat exchanger of claim 1, wherein the gap of the fin is a slot that requires removal of fin material when forming the fin.

For at least one of the fins in an unfolded state, the gap and the tab have a length that extends parallel to the length of the fin, and the ratio of the length of the gap to the length of the tab is The heat exchanger according to claim 1, which is 200 to 600.

The heat exchanger of claim 1, wherein at least one of the tubes is a multi-port tube having a hydrodynamic diameter of 0.38 mm to 1.02 mm.

A heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle:
A set of elongated headers having longitudinal axes disposed substantially parallel to each other;
A plurality of elongate tubes spaced apart in parallel along the longitudinal axis of the header, each tube having a flat cross section having a long side and a short side, each tube being between the headers A first end connected to one of the headers and a second end connected to the other header, each tube being continuous from the one header to the other header. The tubes themselves are folded so as to define parallel sections of at least two tubes so that the working fluid flows through at least two parallel fluid paths to each of the parallel sections. The long side of the tube is disposed on a common plane substantially perpendicular to the longitudinal axis of the header; and
Serpentine fins extending between adjacent sets of tubes, each fin extending parallel to the parallel sections of the adjacent tubes and extending over at least two parallel sections of the adjacent tubes A plurality of alternating tabs and elongated gaps each extending parallel to the parallel section, the tabs and the gaps connecting the lateral widths of each fin to each other by the tabs. Is disposed between the parallel sections of the adjacent tubes to divide into separate fin elements, each fin element corresponding to one of the parallel sections of the adjacent tubes, heat exchanger comprising a fin, characterized in that it extends along one.

The heat exchanger according to claim 11, wherein the long side of each tube is 12.7 mm or less and the short side is 2.54 mm or less.

The heat exchanger according to claim 11, wherein the long side of each tube is 8.13 mm or less and the short side is 1.52 mm or less.

At least two bends to define parallel sections of at least three tubes, such that each tube flows the working fluid continuously from one header to the other through at least three parallel fluid paths. The heat exchanger according to claim 11.

The heat exchanger according to claim 11, wherein the long side of the end of the tube extends parallel to the longitudinal axis of the header at a portion where the end of the tube connects to the header.

The heat exchanger of claim 11, wherein the gap of the fin is a slit that does not require removal of fin material when forming the fin.

For at least one of the fins in an unfolded state, the gap and the tab have a length that extends parallel to the length of the fin, and the ratio of the length of the gap to the length of the tab is 12. A heat exchanger according to claim 11 which is 200 to 600.

A heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle:
A set of elongated headers having longitudinal axes disposed substantially parallel to each other;
A plurality of elongate tubes spaced apart in parallel along the longitudinal axis of the header, each tube having a flat cross section having a long side and a short side, the long sides of each tube Is 12.7 mm or less, the short side is 2.54 mm or less, and each tube is connected to a first end connected to one of the headers and the other header to convey working fluid between the headers Parallel sections of at least two tubes such that each tube flows the working fluid through at least two parallel fluid paths continuously from the one header to the other header. And the parallel sections of each pipe are arranged on a common plane in which the long sides of each of the parallel sections are substantially perpendicular to the longitudinal axis of the header. A tube characterized in that; and
A serpentine fins that extend between pairs of adjacent said tube, heat exchange with the fins each fin is characterized in that it has a length that extends parallel to the parallel section of the adjacent tubes vessel.

A heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle:
A set of elongated headers having longitudinal axes disposed substantially parallel to each other;
A plurality of elongate tubes spaced apart in parallel along the longitudinal axis of the header, each tube having a flat cross section having a long side and a short side, each tube being between the headers A first end connected to one of the headers and a second end connected to the other header, each tube being continuous from the one header to the other header. The tube itself is bent at least two times to define parallel sections of at least three tubes so that the working fluid flows through at least three parallel fluid paths to the parallel sections. A tube characterized in that the long sides of each section are arranged on a common plane substantially perpendicular to the longitudinal axis of the header; and
A serpentine fins that extend between pairs of adjacent said tube, heat exchange with the fins each fin is characterized in that it has a length that extends parallel to the parallel section of the adjacent tubes vessel.

A heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle:
A set of elongated headers having longitudinal axes disposed substantially parallel to each other;
A plurality of elongated tubes spaced apart in parallel relation along the longitudinal axis of the header, each tube having a flat cross section with a long side and a short side, each tube being 0.38 mm A multi-port tube having a hydrodynamic diameter from 1.02 mm to 1.02 mm, each tube connected to a first end connected to one of the headers and a second connected to the other header for transferring working fluid between the headers Having two ends and defining a parallel section of at least two tubes such that each tube flows the working fluid through at least two parallel fluid paths sequentially from the one header to the other header In order to do this, the tubes themselves are bent and the parallel sections of each tube are arranged on a common plane in which the long sides of each of the parallel sections are substantially perpendicular to the longitudinal axis of the header A tube characterized by; and ,
A serpentine fins that extend between pairs of adjacent said tube, heat exchange with the fins each fin is characterized in that it has a length that extends parallel to the parallel section of the adjacent tubes vessel.