Samavirtalämmönvaihdin

Samavirtalämmönvaihdin, also known as a parallel flow heat exchanger, is a type of device used to transfer heat between two fluids. In a samavirtalämmönvaihdin, both fluids flow in the same direction, moving from one end of the exchanger to the other. This arrangement contrasts with counter-current heat exchangers where the fluids flow in opposite directions. The temperature difference between the two fluids is generally highest at the inlet and decreases along the length of the exchanger. This leads to a more uniform heat transfer rate across the entire surface compared to counter-current designs, but potentially a lower overall thermal efficiency.

The design of a samavirtalämmönvaihdin can vary, but it typically involves channels or tubes through which the fluids pass. One fluid flows through these channels, and the other fluid flows around them, facilitating heat exchange through the separating wall. Applications for samavirtalämmönvaihdin can be found in various industries, including HVAC systems, automotive radiators, and chemical processing. While simpler to design and manufacture in some cases, their efficiency limitations mean they are often chosen when space or cost considerations are paramount, or when a slightly lower level of thermal performance is acceptable. The choice between a samavirtalämmönvaihdin and other heat exchanger types depends heavily on the specific requirements of the application, including desired efficiency, pressure drop, and available space.