该过程是指换热器中介质的相同流动方向上的一组平行流动通道，并且流动路径是指由换热器中的两个相邻板形成的介质流动通道。通常，换热器若干流动路径并联或串联连接以形成冷、热介质通道的不同组合。

应根据换热器传热和流体阻力计算工艺组合，并确定其符合工艺条件。尽量使冷、热水流道中的对流换热系数相等或接近，以获得最佳的换热效果。换热器传热系数得到较大的值，因为传热表面两侧的对流传热系数相等或接近。尽管换热器的板之间的流速不相等，但计算基于传热和流体阻力计算中的平均流速。由于“U”形单流喷嘴固定在压板上，拆卸和组装方便。

英文版：

The process refers to a group of parallel flow channels in the same direction of the medium flow in the heat exchanger, and the flow path refers to the medium flow channel formed by two adjacent plates in the heat exchanger. Usually, several flow paths of heat exchangers are connected in parallel or in series to form different combinations of cold and hot medium channels.

The process combination should be calculated according to the heat transfer and fluid resistance of the heat exchanger, and it is determined that it meets the technological conditions. The convective heat transfer coefficients in cold and hot water runners should be equal or close to each other so as to obtain the best heat transfer effect. The heat transfer coefficient of the heat exchanger is larger because the convective heat transfer coefficients on both sides of the heat transfer surface are equal or close. Although the flow velocities between the plates of a heat exchanger are not equal, the calculation is based on the average flow velocities in heat transfer and fluid resistance calculations. Because the "U" shaped single nozzle is fixed on the pressure plate, it is easy to disassemble and assemble.