Figure 1.
The illustration depicts a cross-sectional view with three distinct layers: two outer layers represent service fluid in pink, while the central layer illustrates process fluid in blue. The service fluid layers are oriented vertically, with red arrows indicating flow direction upwards and downwards, while the process fluid flows horizontally from left to right, marked by a blue arrow. The layout features a linear arrangement of the fluid layers, with the HE axis labeled at the bottom, indicating a specific reference point, and internal flow details represented through curved lines within the process fluid layer.Section view of the system, with reference to the service and process fluids flow direction
Source: Authors’ own work