JP2008546984A5 - - Google Patents

Claims (15)

A heat transfer device,
A venturi-shaped duct including a neck defined by at least one boundary wall;
A heat source external to the boundary wall and in thermal communication with the boundary wall;
(I) the neck portion includes a heat conductive portion substantially at the apex of the neck portion, and has a heat insulating portion around the heat conductive portion;
(Ii) A heat transfer device in which heat is transferred from the heat source to the fluid flowing through the neck through the thermally conductive portion.   The heat transfer device of claim 1, further comprising at least one heat conductive fin extending from the heat conductive portion into the neck.   The heat transfer device according to claim 2, wherein the fin extends over a width of a cross section of the neck portion.   The heat transfer device of claim 2, wherein a plurality of thermally conductive fins form a thermally conductive grid in thermal communication with the thermally conductive portion.   The heat transfer device according to claim 2, wherein the fin is shaped to minimize an aerodynamic drag acting on a fluid flowing through the neck portion.   The heat transfer device of claim 2, wherein the fin is aligned with a streamline of fluid flowing through the neck portion to reduce drag acting on the fluid flow.   The heat transfer device according to claim 2, wherein a cross-sectional area of the fin changes according to a distance from the boundary wall.   The heat transfer device of claim 1, wherein a heat transfer rate is controlled by varying a pressure drop across the neck.   The heat transfer device of claim 1, wherein the neck portion includes a diffuser portion.   The heat transfer device of claim 9, wherein the diffuser portion expands gently enough to maintain a laminar flow of fluid flowing through the neck.   The heat transfer device of claim 1, wherein the duct discharges a flow into its local ambient environment. Bernoulli type heat pump system,
A venturi-shaped duct including a neck defined by at least one boundary wall;
A working fluid flowing through the venturi-shaped duct;
A heat source external to the boundary wall and in thermal communication with the boundary wall, wherein: (i) the neck portion includes a thermally conductive portion substantially at the apex of the neck portion; A heat source having a heat insulating portion around the portion; (ii) heat is transferred from the heat source to the working fluid through the heat conductive portion;
A Bernoulli type heat pump system including a blower mechanism for maintaining a flow of working fluid through the duct. A heat sink,
A heat exchange mechanism for transferring heat from the working fluid to the heat sink;
The Bernoulli type heat pump system according to claim 12, further comprising at least one duct structure connecting the blower mechanism, the heat exchange mechanism, and the venturi-shaped duct. A method of transferring heat to a flow,
Providing a venturi-shaped duct including a neck defined by at least one boundary wall;
A heat source external to the boundary wall and in thermal communication with the boundary wall, the neck portion including a thermally conductive portion substantially at the apex of the neck portion, and around the thermally conductive portion; Has an insulating part,
Providing a working fluid in the duct;
Maintaining a pressure drop of the working fluid across at least a portion of the neck to maintain the flow of the working fluid through the neck so that heat is passed from the heat source through the thermally conductive portion. Transferring to said fluid.   The method of claim 14, wherein a heat transfer rate is controlled by a change in the pressure drop.