| 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. |
