ONCE-THROUGH HEAT EXCHANGER AND HEAT RECOVERY STEAM GENERATOR INCLUDING THE SAME

Disclosed herein is a once-through heat exchanger that includes a tube stack including a plurality of tubes, a plurality of heads connected to the tubes and configured to accommodate heated steam, a manifold connected to the heads and configured to accommodate heated steam, and a first link pipe and a second link pipe configured to connect the heads and the manifold. The heads are spaced in a direction crossing a longitudinal direction thereof, and the first link pipe and the second link pipe include a first inclined link part or a second inclined link part, respectively, extending at an angle to each other.