当前申请(专利权)人地址：
Four Coliseum Centre, 2730 West Tyvola Road, Charlotte 28217-4578, North Carolina, United States of America
摘要：
A heat exchanger 200 comprises first and second fluid circuits 206, 214. The first fluid circuit defines a first volume and has a first fluid, such as hot oil. The second circuit defines a second volume and has a second fluid, such as cool air. Each circuit has a fluid supply 208, 216. The first and second volumes are separate and share at least one common wall 215, which may be formed of a thermally isolating material. At least one thermal transfer sheet 234 transfers heat between the circuits. Each sheet has one or more channels (402, fig 4) having a thermodynamic (heat transfer) fluid therein, which may condense and evaporate. Each sheet may be formed from two sheets sandwiched together with the channel(s) formed therebetween. A thermal transfer rate through the at least one common wall 215 is less than a thermal transfer rate of the one or more thermal transfer sheets 234. The fluid circuits may comprise layers 222, 228 having fins 226, 232. The heat exchanger may be used in a gas turbine engine. A method of manufacturing a heat exchanger is disclosed.
权利要求：
CLAIMS:
1. A heat exchanger comprising:
a first fluid circuit defining a first volume and configured to permit a first fluid to flow therethrough;
a first fluid supply connected to the first fluid circuit and configured to supply a first fluid to the first fluid circuit;
a second fluid circuit defining a second volume separate from the first volume and sharing at least one common wall with the first enclosed volume, and configured to permit a second fluid to flow therethrough;
a second fluid supply connected to the second fluid circuit and configured to supply a second fluid to the second fluid circuit; and
one or more thermal transfer sheets defining one or more channels therein, the one or more thermal transfer sheets configured in structural and thermal contact with both the first fluid circuit and the second fluid circuit, the one or more channels having a thermodynamic fluid disposed therein and configured to transfer heat between the first fluid circuit and the second fluid circuit,
wherein a thermal transfer rate through the at least one common wall is less than a thermal transfer rate of the one or more thermal transfer sheets.
2. The heat exchanger of claim 1, wherein each of the one or more thermal transfer sheets is formed from two sheets sandwiched together and the one or more channels are formed therebetween.
3. The heat exchanger of claim 1 or 2, wherein the difference in thermal transfer rates between the common wall and the one or more thermal transfer sheets occurs during operation.
4. The heat exchanger of any preceding claim, wherein the first fluid is a liquid and the second fluid is a gas.
3. The heat exchanger of claim 4, wherein the liquid is oil and the gas is air.
6. The heat exchanger of any preceding claim, wherein the first fluid circuit and the second fluid circuit are physically separated but thermally connected by the one or more thermal transfer sheets.
7. The heat exchanger of any preceding claim, wherein the thermodynamic fluid comprises at least one of water, alcohol, glycol, and naphtha.
8. The heat exchanger of any preceding claim, wherein the heat exchanger is used on a gas turbine engine.
9. A method of manufacturing a heat exchanger, the method comprising:
forming a first portion of a heat exchanger configured to have a first fluid pass therethrough;
forming a second portion of a heat exchanger configured to have a second fluid pass therethrough, the second portion sharing at least one common wall with the first portion; and
thermally connecting the first portion and the second portion with one or more thermal transfer sheets configured to transfer thermal energy from the first portion to the second portion,
wherein a thermal transfer rate through the at least one common wall is less than a thermal transfer rate of the one or more thermal transfer sheets.
10. The method of claim 9, wherein at least one of the first portion, the second portion, and the one or more thermal transfer sheets are formed by additive manufacturing.
11. The method of claim 9 or 10, wherein the first portion and the second portion are manufactured physically separate and physically connected by the one or more thermal transfer sheets.
12. The method of any of claims 9 to 11, further comprising forming one or more channels in the one or more thermal transfer sheets.
13. The method of claim 12, further comprising filling the one or more channels with a thermodynamic fluid.
14. The method of claim 12 or 13, wherein the one or more channels are formed by at least one of additive manufacturing, etching, chemical etching, milling, electrical discharge machining, casting, and machining.
15. The method of any of claims 9 to 14, further comprising configuring the heat exchanger to cool an engine oil of an aircraft.