Heat exchanger and cooling method
AssigneeTechnische UniversitäT Dresden
InventorsAndreas Wagner, Yixia Xu, Ullrich Hesse
Life of this patent
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Abstract
According to various embodiments of the invention, a heat exchanger can have at least one duct for conveying a coolant, wherein the at least one duct has a first section and a second section, the first section being arranged in the at least one duct upstream relative to the second section, in relation to a flow direction of the coolant, the second section having a cross section area that is larger than a cross section area of the first section, such that a sublimation of the coolant in the second section is made possible.
Claims12
A heat exchanger comprising at least one duct for carrying refrigerant, the at least one duct comprising a first section and a second section;
- wherein the first section is disposed upstream relative to the second section with respect to a direction of flow of the refrigerant in the at least one duct;
- wherein the second section has a cross-sectional area that is larger than a cross-sectional area of the first section so as to allow sublimation of the refrigerant in the second section;
- wherein the at least one duct comprises a narrowing member disposed in the first section such that the cross-sectional area of the first section is reduced.
A cooling method for cooling a fluid by sublimation of a refrigerant comprising the following:
- Providing a refrigerant to a heat exchanger, the heat exchanger comprising at least one duct for carrying refrigerant;
- Guiding the refrigerant into the at least one duct, wherein the at least one duct comprises a first section and a second section;
- wherein the first section is disposed upstream relative to the second section with respect to a direction of flow of the refrigerant in the at least one duct;
- wherein the second section has a cross-sectional area that is larger than a cross-sectional area of the first section o as to allow sublimation of the refrigerant in the second section;
- and wherein the at least one duct comprises a narrowing member disposed in the first section such that the cross-sectional area of the first section is reduced;
- and
- providing heat transfer between the refrigerant flowing into the second section and the fluid to be cooled, such that the refrigerant flowing in the second section is sublimated and the fluid to be cooled is cooled.
A heat exchanger comprising at least one duct for carrying refrigerant, wherein the at least one duct comprises a first section, a second section, and a narrowing member disposed in the first section such that the cross-sectional area of the first section is reduced;
- wherein the first section is disposed upstream relative to the second section with respect to a direction of flow of a refrigerant in the at least one duct,
- wherein the first section is configured such that the refrigerant flowing into the first section is at a pressure level which is above a pressure level of a triple point of the refrigerant, and
- wherein the second section is configured such that a refrigerant flowing into the second section is at a pressure level which is below the pressure level of the triple point of the refrigerant.
Dependencies are inferred from the claim text.