POWER SYSTEM AND METHOD

摘要

A power system (90) includes a device (3, 43, 300) for extracting energy from a hot gas stream to power a driveshaft (4a). An evaporative duplex counterheat exchanger (5, 9, 24, 59, 60, 130, 202) is disposed in flow communication with the energy extracting device. The duplex exchanger includes a first heat exchanger (72) having a first main flow channel (80a), and a counterheat channel (82a, b) joined in flow communication therewith. A second heat exchanger (74) includes a second main flow channel (80b) adjacent the counterheat channel (82a, b). And, a evaporative fluid is injected into the counterheat channel to evaporatively cool the flow through both main flow channels.