Which heat exchanger type has the fluid inside the tubes traveling from one end to the other without changing direction?

Which heat exchanger type has the fluid inside the tubes traveling from one end to the other without changing direction?

• A. Straight Tube
• B. Shell and Tube Type Heat Exchanger
• C. U-Tube
• D. Multi-Pass HXR

Answer: (A)

Think about the path the fluid takes inside the tubes. In a straight-tube heat exchanger, each tube carries fluid in a straight line from one end to the other, so the flow travels without bending or reversing inside the tube. That single, straight pass means the direction doesn’t change as the fluid moves along the tube length. In contrast, a U-tube has tubes that bend into a U shape, so the fluid must turn around to exit, changing direction. Multi-pass or shell-and-tube configurations route flow through several passes, often reversing direction at tube sheets or bends to achieve more heat transfer, so the flow direction within the tubes is not maintained in a straight path. So the option where the fluid maintains a straight path from inlet to outlet through the tubes is the straight-tube heat exchanger.

Think about the path the fluid takes inside the tubes. In a straight-tube heat exchanger, each tube carries fluid in a straight line from one end to the other, so the flow travels without bending or reversing inside the tube. That single, straight pass means the direction doesn’t change as the fluid moves along the tube length.

In contrast, a U-tube has tubes that bend into a U shape, so the fluid must turn around to exit, changing direction. Multi-pass or shell-and-tube configurations route flow through several passes, often reversing direction at tube sheets or bends to achieve more heat transfer, so the flow direction within the tubes is not maintained in a straight path.

So the option where the fluid maintains a straight path from inlet to outlet through the tubes is the straight-tube heat exchanger.